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1.
Qiang Chu Linhua Liao Bin Liu Gaorong Han Xiang Li 《Advanced functional materials》2021,31(33):2103262
As a type of unique gaseous molecules, SO2 presents capabilities in the feasible cellular influx and the induction of apoptosis by generating intracellular toxic radicals. Developing therapeutic platforms to enable effective SO2 gas release at the tumor site is highly demanded in the exploration of more “green” and effective treatment protocols for cancer therapy but remains challenging. Here for the first time, fine nanosheets composing of Mg-Al layered double hydroxides (MgAl LDH) are synthesized and inserted with sulfite in its layered structures (MgAl-SO3 LDH). After the loading of glucose oxidase (GOx/MgAl-SO3 LDH), the composite nanosheets present the controllable SO2 gas release in an acidic responsive manner. Owing to the glycolysis effect of GOx, the gluconic acid generated agitates the intracellular SO2 release from nanosheets, and excessive H2O2 reacts with SO2 effectively and facilitates the production of toxic radicals, inducing remarkable oxidative damages to tumor cells. Meanwhile, the consumption of intracellular glucose by GOx/MgAl-SO3 LDH depletes the energy supply of tumor cells, favoring the tumor inhibition both in vitro and in vivo in a synergistic fashion. Therefore, this study has provided distinctive perspectives in the exploration of therapeutic platforms with green functionalities and biodegradability for effective tumor treatment. 相似文献
2.
The dramatically increasing demand of high‐energy lithium‐ion batteries (LIBs) urgently requires advanced substitution for graphite‐based anodes. Herein, inspired from the extra capacity of lithium storage in solid‐electrolyte interface (SEI) films, layered hydroxide cobalt acetates (LHCA, Co(Ac)0.48(OH)1.52·0.55H2O) are introduced as novel and high‐efficiency anode materials. Furthermore, ultrathin LHCA nanoplates are face‐to‐face anchored on the surface of graphene nanosheets (GNS) through a facile solvothermal method to improve the electronic transport and avoid agglomeration during repeated cycles. Profiting from the parallel structure, LHCA//GNS nanosheets exhibit extraordinary long‐term and high‐rate performance. At the current densities of 1000 and 4000 mA g?1, the reversible capacities maintain ≈1050 mAh g?1 after 200 cycles and ≈780 mAh g?1 after 300 cycles, respectively, much higher than the theoretical value of LHCA according to the conversion mechanism. Fourier transform infrared spectroscopy confirms the conversion from acetate to acetaldehyde after lithiation. A reasonable mechanism is proposed to elucidate the lithium storage behaviors referring to the electrocatalytic conversion of OH groups with Co nanocatalysts. This work can help further understand the contribution of SEI components (especially LiOH and LiAc) to lithium storage. It is envisaged that layered transition metal hydroxides can be used as advanced materials for energy storage devices. 相似文献
3.
Enkhbayar Enkhtuvshin Sunghwan Yeo Hyojeong Choi Kang Min Kim Byeong-Seon An Swarup Biswas Yongju Lee Arpan Kumar Nayak Jin Uk Jang Kyeong-Han Na Won-Youl Choi Ghulam Ali Keun Hwa Chae Muhammad Akbar Kyung Yoon Chung Kyoungmin Yoo Yong-Chae Chung Tae Ho Shin Hyeok Kim Chan-Yeup Chung HyukSu Han 《Advanced functional materials》2023,33(22):2214069
Generation of hydrogen fuel via electrochemical water splitting powered by sustainable energy, such as wind or solar energy, is an attractive path toward the future renewable energy landscape. However, current water electrolysis requires desalinated water resources, eventually leading to energy costs and water scarcity. The development of cost-effective electrocatalysts capable of splitting saline water feeds directly can be an evident solution. Herein, a surface reconstructed nickel-iron layered double hydroxide (NF-LDH) is reported as an exceptionally active and durable bifunctional electrocatalyst for saline water splitting without chloride corrosion. The surface reconstructed NF-LDH consists of Ni3Fe alloy phase interconnected in a 2D network in which an ultrathin (≈2 nm) and low-crystalline NiFe (oxy)hydroxide phase are formed on the surface. The NiFe (oxy)hydroxide phase draws large anodic current densities, satisfying the level of practical application, while the Ni3Fe alloy phase is simultaneously responsible for the high catalytic activity for cathodic reactions and superior corrosion resistance. The surface reconstructed NF-LDH electrode can be easily fabricated in a large electrode area (up to 25 cm2) and can successfully produce hydrogen fuels from saline water powered by the laboratory-made low-intensity photovoltaic cell. 相似文献
4.
Xiaorui Gao Ximeng Liu Dajun Wu Bin Qian Zongkui Kou Zhenghui Pan Yajun Pang Linqing Miao John Wang 《Advanced functional materials》2019,29(36)
The Al effect on the electrochemical properties of layered double hydroxides (LDHs) is not properly probed, although it is demonstrated to notably promote the capacitive behavior of LDHs. Herein, ternary NiCo2Alx layered double hydroxides with varying levels of Al stoichiometry are purposely developed, grown directly on mechanically flexible and electrically conducting carbon cloth (CC@NiCo2Alx‐LDH). Al plays a significant role in determining the structure, morphology, and electrochemical behavior of NiCo2Alx‐LDHs. At an increasing level of Al in NiCo2Alx‐LDHs, there is a steady evolution from 1D nanowire to 2D nanosheets. The CC@NiCo2Al‐LDH at an appropriate level of Al and with the nanowire–nanosheet mixed morphology exhibits both significantly enhanced electrochemical performance and excellent structural stability, with about a 2.3‐fold capacitance of NiCo2‐OH. When applied as the anode in a flexible asymmetric supercapacitor (ASC), the CC@NiCo2Al‐LDH gives rise to a remarkable energy density of 44 Wh kg?1 at the power density of 462 W kg?1, together with remarkable cyclic stability with 91.2% capacitance retention over 15 000 charge–discharge cycles. The present study demonstrates a new pathway to significantly improve the electrochemical performance and stability of transition metal LDHs, which are otherwise unstable in structure and poorly performing in both rate and cycling capability. 相似文献
5.
Seungho Cho Ji‐Wook Jang Ki‐jeong Kong Eun Sun Kim Kun‐Hong Lee Jae Sung Lee 《Advanced functional materials》2013,23(19):2348-2356
Mixed metal oxide (MMO) nanostructures co‐doped uniformly by carbon and nitrogen are synthesized for the first time by annealing a terephthalate‐intercalated layered double hydroxide (LDH) under ammonia gas flow. The interlayer gallery of LDH allows effective access of NH3 and the carbon source to its crystal lattice for a uniform nitrogen and carbon doping. Such co‐doped MMO exhibit significantly red‐shifted absorption spectra to visible light region relative to pure MMO. Photoelectrochemical water oxidation and incident‐photon‐to‐current‐conversion efficiency of LDH‐derived photocatalysts demonstrate that all the visible light absorption caused by the anion doping contributes to the photocatalytic activity over the entire absorbed wavelength range of <610 nm. Density functional theory calculations of electronic structures are performed to elucidate the possibility of bandgap narrowing upon nitrogen and carbon co‐doping on MMO structures. 相似文献
6.
Jinchan Zhao Mingliang Zhang Sinong Wang Zhongjie Cui Zhenyu Dai Haiyang He Shuaitao Qin Shiliang Mei Wanlu Zhang Ruiqian Guo 《Advanced functional materials》2024,34(36):2401067
Paper-based cultural relics are of great value and have been facing irreversible damage caused by multiple factors, among which acid hydrolysis and ultraviolet photodegradation are the main processes leading to paper deterioration. Paper protection highly relies on a limited range of materials with single functions, and the design of new materials that ensure long-term safety and efficiency by simultaneously addressing the issues of acidification and UV degradation in paper is highly desired. In this study, the introduction of carbon dots (CDs)-enhanced layered double hydroxides (LDH) 0D/2D nanohybrids (CDs/Mg-Al LDH) is proposed as novel dual-functional materials for paper protection against UV degradation and acidification. Through a CDs-assisted in situ growth strategy, CDs/Mg-Al LDH with ultrathin thickness (≈9.1 nm) and CDs-intercalated structure are achieved. The CDs/Mg-Al LDH nanohybrids demonstrate high dispersibility, strong UV absorption, and remarkable photostability, resulting in protected-paper with decelerated acidification, oxidation, and yellowing degradation processes under both accelerated UV-aging and dry-heat conditions. Additionally, the protected-paper can emit uniform blue light under 365 nm UV excitation allows for easy identification of the distributed CDs/Mg-Al LDH within the paper, marking a unique and practical feature. This research paces a new direction for the protection of paper-based relics with emerging carbon dots-based 0D/2D nanomaterials. 相似文献
7.
Debarani Devi Khumujam Tolendra Kshetri Thangjam Ibomcha Singh Nam Hoon Kim Joong Hee Lee 《Advanced functional materials》2023,33(40):2302388
The judicious design of highly electrochemically active materials on 1D fiber substrate to form a hierarchical integrated hybrid structure is an efficient technique to improve the limited cylindrical space and volumetric energy density of fiber-shaped supercapacitors (FSCs). Herein, a 3D negative electrode, consisting of vertically aligned interconnected mesoporous Co-N/C leaf-like structure on 1D MXene-carbon fiber (Co-N/C@MX/CF) is prepared by controlling the composition and morphology. At the same time, a 3D positive electrode is also prepared by introducing Mo in NiCo-LDH anchored on Co-N/C@MX/CF (Mo-NiCo-LDH@Co-N/C@MX/CF) by electrodeposition method. Benefitting from the systematic hierarchical structures with highly accessible surface area, adequate pore size and easy permeation of electrolyte, both positive and negative electrodes demonstrate highly improved electrochemical performance with areal capacity/capacitance of 0.96 mAh cm−2/4.55 mF cm−2 at a current density of 3.86 mA cm−2, respectively. Furthermore, the fiber-shaped solid-state hybrid supercapacitor (FSHSC) based on Mo1.5NiCo-LDH@Co-N/C@MX/CF(+)//Co-N/C0.5@MX/CF(−) is fabricated, exhibiting compelling energy density of 86.72 mWh cm−3 at a power density of 480.30 mW cm−3 with an outstanding capacitance retention of 80.2% after 20000 galvanostatic-charge-discharge cycles. This study puts forward a new perspective on the development of highly efficient FSCs for practical application. 相似文献
8.
Yanqun Tang Haoming Shen Jinqian Cheng Zibin Liang Chong Qu Hassina Tabassum Ruqiang Zou 《Advanced functional materials》2020,30(11)
The rational design of advanced structures consisting of multiple components with excellent electrochemical capacitive properties is one of the crucial hindrances to be overcome for high‐performance supercapacitors (SCs). Herein, a superfast and facile synthesis of flower‐like NiMn‐layered double hydroxides (NiMn‐LDH) with high SC performance using an electrodeposition process on nickel foam is proposed. Oxygen vacancies are then modulated via mild H2O2 treatment for the first time, significantly promoting the electrochemical energy storage performance. The oxygen‐vacancy abundant NiMn‐LDH (Ov‐LDH) reaches a maximum specific capacity of 1183 C g?1 at the current density of 1 A g?1 and retains a high capacity retention of 835 C g?1 even at a current density of up to 10 A g?1. Furthermore, the assembled asymmetric SC device achieves a high specific energy density of 46.7 Wh kg?1 at a power density of 1.7 kW kg?1. Oxygen vacancies are proven to play a vital role in the improvement of electrochemistry performance of LDH based on experimental and theoretical studies. This vacancy engineering strategy provides a new insight into SC active materials and should be beneficial for the design of the next generation of energy storage devices. 相似文献
9.
Bingqing Wang Xiang Yang Yingyan Fang Xulin Zhou Runtao Jiang Xu Han Shiji Wang Yanjun Lin Junfeng Liu Xue Duan 《Advanced functional materials》2024,34(45):2404828
The exploitation of effective and nontoxic materials with antioxidant activity to mitigate or inhibit the damage caused by elevated levels of free radicals has attracted considerable attention across diverse fields. Herein, this study demonstrates that a biocompatible MgAl-layered double hydroxide (LDH) can be activated for multiple types of free radical scavenging with unexpected activity through amorphization (a-MgAl-LDH). Detailed characterization reveals that numerous oxygen defects are introduced after amorphization. Mechanistic studies and theoretical simulations indicate that amorphization-induced oxygen defects in a-MgAl-LDH promote radical adsorption and reduce the reaction energy barriers, thereby resulting in enhanced radical scavenging activities. Consequently, a-MgAl-LDH demonstrated remarkable efficiency in mitigating the oxidative injury induced by Rosup in cells and provided thermal stabilization of polyvinyl chloride against degradation. This study demonstrates the transformation of inert MgAl-LDH into a promising, nontoxic, and cost-effective nano-antioxidant option for antioxidative therapy or polymer stabilization and highlights the significance of crystallinity engineering of nanomaterials for efficient free radical scavenging. 相似文献
10.
Shuixin Xia Binbin Yang Hebin Zhang Junhe Yang Wei Liu Shiyou Zheng 《Advanced functional materials》2021,31(28):2101168
Solid electrolytes are the most promising substitutes for liquid electrolytes to construct high-safety and high-energy-density energy storage devices. Nevertheless, the poor lithium ion mobility and ionic conductivity at room temperature (RT) have seriously hindered their practical usage. Herein, single-layer layered-double-hydroxide nanosheets (SLN) reinforced poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite polymer electrolyte is designed, which delivers an exceptionally high ionic conductivity of 2.2 × 10−4 S cm−1 (25 ° C), superior Li+ transfer number ( ≈ 0.78) and wide electrochemical window ( ≈ 4.9 V) with a low SLN loading ( ≈ 1 wt%). The Li symmetric cells demonstrate ultra-long lifespan stable cycling over ≈ 900 h at 0.1 mA cm−2, RT. Moreover, the all-solid-state Li|LiFePO4 cells can run stably with a high capacity retention of 98.6% over 190 cycles at 0.1 C, RT. Moreover, using LiCoO2/LiNi0.8Co0.1Mn0.1O2, the all-solid-state lithium metal batteries also demonstrate excellent cycling at RT. Density functional theory calculations are performed to elucidate the working mechanism of SLN in the polymer matrix. This is the first report of all-solid-state lithium batteries working at RT with PVDF-HFP based solid electrolyte, providing a novel strategy and significant step toward cost-effective and scalable solid electrolytes for practical usage at RT. 相似文献
11.
Jintong Niu;Yang Guo;Guoxin Jing;Hong Wang;Li Yang;Youyuan Li;Yi Gao;Huichao Wang;Ang Li;Xiaorong Xu;Yechang Qian;Jian Fei;Shilong Wang; 《Advanced functional materials》2024,34(14):2305042
Inflammatory bowel disease (IBD) is a chronic and destructive autoimmune disease that has created a global burden. However, the pathogenesis and treatment strategies of IBD remain difficult problems to overcome. The anti-inflammatory action of anion-dependent layered double hydroxide (LDH) is evaluated in IBD. Raw264.7 macrophages induced by Lipopolysaccharide (LPS) produced low levels of pro-inflammatory cytokines after LDH treatment. The results from dextran sulfate sodium (DSS)-induced murine colitis models show that LDHs significantly reduce pro-inflammatory cytokines in the colon tissue and inhibit colon atrophy. Most importantly, LDH with NO3− as the interlayer anion (LDH-NO3−) demonstrates superior anti-inflammatory ability compared to LDH with Cl− as the interlayer anion (LDH-Cl−), both in vitro and in vivo. LDH-NO3− promotes the differentiation of CD206+CX3CR1+ lamina propria macrophages, reduces the abundance of T helper 17 (Th17) cells, and inhibits the activation of the IL-17 signaling pathway. LDH-NO3− also limits the pro-inflammatory effects of IL-17A on macrophages, and the anti-inflammatory effects of LDH-NO3− are reversed by IL-17RA-siRNA. Suggesting that LDH effectively inhibits the inflammatory reaction induced by the interaction between macrophages and Th17 cells. This study demonstrates that LDH-NO3− is a drug-free nanomedicine that acts against IBD, providing application prospects for LDH-NO3− in IBD treatment. 相似文献
12.
Supported multimetallic alloy nanoparticles (NPs) have shown great potential for applications owing to combined functions of constituent metals, and more remarkably, enhanced physicochemical properties and even novel synergistic effects that are not possessed by their parent metals. Nevertheless, synthesizing this kind of nanocomposites has been a long‐standing challenge using conventional wet chemistry. Here, this study reports an efficient, versatile strategy for the preparation of multimetallic alloy NPs supported by layered double hydroxides (LDH) and/or layered double oxides (LDO). In this approach, different metal precursors are intercalated stepwise into the gallery space of LDH. Along with the coordination reaction between the metal precursors, 2D cyanide bridged coordination polymers (CP) are formed in the confined space. Afterward, supported multimetallic alloy NPs can be obtained via either liquid‐phase reduction or thermal autoreduction. Due to the homogeneous mixing of metals in the 2D CP, ultrafine alloy NPs can be obtained with high particulate uniformity and compositional tailorability. A large series of supported binary alloy NPs (FePd, FePt, CoPd, CoPt, NiPd, NiPt, and PtPd) and ternary alloy NPs (FePdPt, FeNiPt, FeCoPt, and NiCoPt) are successfully synthesized with this approach. The resulting supported multimetallic alloy NPs present great potential in numerous applications. To demonstrate their workability, one class of LDH/NiPd nanocomposite is explored as a model heterogeneous catalyst with respect to the carbon–carbon cross‐coupling reactions (Suzuki–Miyaura, Heck, and Sonogashira cross‐coupling reactions). 相似文献
13.
Lei Zhou Cong Zhang Yunqi Zhang Zhenhua Li Mingfei Shao 《Advanced functional materials》2021,31(15):2009743
Layered double hydroxides (LDHs) are regarded as an earth-abundant and highly efficient electrocatalyst for oxygen evolution reaction (OER). In this work, a systematic strategy is demonstrated to simultaneously optimize the OER thermodynamic and kinetic activity via introducing a series of transition and main group metal atoms into the NiFe-LDH host layers. Typically, V, Co, and Cr dopants largely promote the intrinsic activity of NiFe-LDH through the effective electron transfer from Fe3+ in NiFe-LDH laminate to the doping metals, while the introduction of V, Ti, and Mn into NiFe-LDH facilitates the kinetics of water oxidation due to the increased conductivity induced by dopants. Furthermore, the detailed experiments and density functional theory calculations illustrate that the presence of suitable heteroatoms (V) lowers the activation energy barrier for OER rate-limiting step as well as promotes the electron transfers by effective electronic modification. This work provides an effective strategy to modulate the OER activity of LDHs and determine their performance trends for a more rational design of high-performed OER electrocatalysts. 相似文献
14.
Shunfa Zhou Huawei He Jing Li Zihao Ye Zhao Liu Jiawei Shi Yang Hu Weiwei Cai 《Advanced functional materials》2024,34(12):2313770
Realizing rapid transformation of hydroxide to high-active oxyhydroxide species in layered double hydroxide (LDH) catalyst plays a significant role in enhancing its activity toward oxygen evolution reaction (OER) for hydrogen production from water. Here, a scalable strategy is developed to synthesize defect-rich few-layered NiFe-LDH nanosheets (f-NiFe-LDH-B) with in situ borate modified for boosted and stable OER due to that the borate can narrow the bandgap for Ni sites to realize a more conductive electronic structure. Besides, the adsorbed borate can tune the d band center of Ni sites to promote of hydroxide transformation and facilitate the adsorption of the OER intermediates. The f-NiFe-LDH-B catalyst, therefore, requires only 209 and 249 mV overpotential to deliver 10 and 100 mA cm−2 OER, respectively, with a Tafel slope of 43.5 mV dec−1. Moreover, only 1.8 V cell voltage is required to reach Ampere-level overall water splitting for 500 h at room temperature. 相似文献
15.
Kai Zeng Ming Chao Meng Tian Shuhao Jiang Yijia Zhaoshi Jiawen Feng Zhihui Sun Yibing Li 《Advanced functional materials》2024,34(22):2315080
Manipulating the electronic structure and coordination configuration of heterogeneous electrocatalyst is an advantageous strategy to motivate the intrinsic activity but remains challenging. Herein, guided by the theoretical mechanism of the d-band center and valence-bond theory, the high-valence metal-modulated nickel-vanadium layered double hydroxides (M-NiV LDH, M = Zr, and Mo) with interfacial oxygen bridge bonding structure are rationally designed and fabricated, affording a 3D vertically staggered and porous nanosheets array network. Benefitting from the abundant unfilled antibonding orbitals induced by the optimized Zr d-orbital and O p-orbital hybridization, the introduction of Zr site is beneficial to accelerate charge transfer kinetics and optimize the deprotonation of OH* as well as lower the O* → OOH* free energy. As a result, the as-prepared Zr-NiV LDH exhibits a promising oxygen evolution reaction performance with low overpotential and favorable long-term stability. This work provides valuable insights into the design of electrocatalysts for electronic regulation and intrinsic activity improvement. 相似文献
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17.
Keyu Zhu Jiyi Chen Wenjie Wang Jiangwen Liao Juncai Dong Mason Oliver Lam Chee Ning Wang Pei Dong Pulickel M. Ajayan Shangpeng Gao Jianfeng Shen Mingxin Ye 《Advanced functional materials》2020,30(35)
Exploring highly active and inexpensive bifunctional electrocatalysts for water‐splitting is considered to be one of the prerequisites for developing hydrogen energy technology. Here, an efficient simultaneous etching‐doping sedimentation equilibrium (EDSE) strategy is proposed to design and prepare hollow Rh‐doped CoFe‐layered double hydroxides for overall water splitting. The elaborate electrocatalyst with optimized composition and typical hollow structure accelerates the electrochemical reactions, which can achieve a current density of 10 mA cm?2 at an overpotential of 28 mV (600 mA cm?2 at 188 mV) for hydrogen evolution reaction (HER) and 100 mA cm?2 at 245 mV for oxygen evolution reaction (OER). The cell voltage for overall water splitting of the electrolyzer assembled by this electrocatalyst is only 1.46 V, a value far lower than that of commercial electrolyzer constructed by Pt/C and RuO2 and most reported bifunctional electrocatalysts. Furthermore, the existence of Fe vacancies introduced by Rh doping and the typical hollow structure are demonstrated to optimize the entire HER and OER processes. EDSE associates doping with template‐directed hollow structures and paves a new avenue for developing bifunctional electrocatalysts for overall water splitting. It is also believed to be practical in other catalysis fields as well. 相似文献
18.
Jing Hu Chenguang Yuan Liping Zhi Huamin Zhang Zhizhang Yuan Xianfeng Li 《Advanced functional materials》2021,31(31):2102167
Rechargeable aqueous zinc-based flow batteries (ZFBs) are promising candidates for large scale energy storage devices. However, the challenges from zinc dendrites and limited areal capacity considerably impede their wide application. Here, an in situ vertical growth of layered double hydroxide membrane (LDH-G) is constructed to enable long-life ZFBs. Owing to the high hydroxide ion conductivity and ion selectivity nature of LDH nanosheets, specifically, the precise control of directional ion transport in vertical arrangement LDHs, a superior battery performance can be realized. Moreover, the defect-free LDHs layer serves as a buffer layer to enable a uniform Zn deposition, which effectively enhances the areal capacity of the battery. As a result, the designed membrane endows an alkaline zinc-iron flow battery with excellent rate performance and cycling stability, maintaining an energy efficiency of 80% at 260 mA cm−2 for 800 cycles, which is the highest performance ever reported. Most importantly, the LDHs layer enables the battery for 1200 h long-cycle stability with a uniform Zn deposition and high areal capacity of 240 mAh cm−2. This work realizes an in situ growth of 3D LDHs arrays on the polymer substrate, which provides a strategy toward high areal capacity and dendrite-free Zn deposition for ZFBs. 相似文献
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20.
Chen Chen Li Tao Shiqian Du Wei Chen Yanyong Wang Yuqin Zou Shuangyin Wang 《Advanced functional materials》2020,30(14)
Along with the increasing aggravation of energy and environmental problems, the demand and utilization of renewable energy have increased. The rational design of advanced functional materials serves as a critical point for the improvement of performance and the practical application in renewable energy devices. Layered double hydroxides (LDHs) with 2D layered structures are promising energy materials for their unique physical and chemical properties. Nevertheless, the applications are limited by the structure of stacking with irrational electronic structure, sluggish mass transfer, and low activity. The exfoliation of LDHs into single‐ or few‐layered nanosheets appears to be a promising approach to overcome the above disadvantages. Herein, the recent progress on the development of exfoliation strategies for LDHs including liquid phase exfoliation, plasma‐induced exfoliation, and other advanced exfoliation strategies is highlighted and the applications in energy conversion and storage are systematically introduced. 相似文献
