Journal of Inorganic and Organometallic Polymers and Materials - Polymeric-inorganic composites are promising for the efficient treatment of contaminated water. In this work, the recyclable... 相似文献
The ordered tin disulfide (SnS2) nanowire arrays were first fabricated by sulfurizing the Sn nanowires, which are embedded in the nanochannels of anodic
aluminum oxide (AAO) template. SnS2 nanowire arrays are highly ordered and highly dense. X-ray diffraction (XRD) and corresponding selected area electron diffraction
(SAED) patterns demonstrate the SnS2 nanowire is hexagonal polycrystalline. The study of UV/Visible/NIR absorption shows the SnS2 nanowire is a wide-band semiconductor with three band gap energies (3.3, 4.4, and 5.8 eV). 相似文献
This study depicts the electrochemical synthesis of nanocomposites based on polyaniline nanorods (NRs) wrap with reduced graphene oxide (PANI–rGO) on ITO substrates for photocurrent generation, photodegradation, and antibacterial applications. The synthesis of PANI–rGO nanocomposites was elaborated by the incorporation of rGO into PANI thin films during electropolymerization in the presence of sulfuric acid. The synthesis of rGO was done by modification on the well-known Hammer’s method. The thin film nanocomposites were characterized by X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (FESEM), UV–Visible and electrochemical photocurrent spectroscopy. FESEM revealed the formation of PANI NRs with diameters of between 50 and 150 nm. The XPS was employed to confirm the compositions of the PANI–rGO nanocomposites. From photoelectrochemical results, the generated photocurrent was improved in the presence of rGO in PANI NRs. Whereas experimental findings show that the introduction of rGO into PANI improved the photoresponse from 7 to 13 µA cm?2. Integration of 3D rGO into PANI results in better photocatalytic performance for the degradation of Congo red (CR). The enhanced photocatalytic activity with the presence of rGO revealed the good potential of PANI-GO nanocomposites for dye degradation. The effective removal of CR of up to 90% has been observed in an acidic medium and is acceptable compared to the surface area of the substrate. At optimum conditions, also the nature of the antibacterial activities has been investigated by ITO/PANI and ITO/PANI–rGO thin films, and the results have shown exhibited antibacterial activity against the growth of E. coli gram-negative bacteria.
To improve the photocatalytic activity of Bi2WO6, ZIF-8 was successfully introduced with the in-situ growth for the first time. The addition of ZIF-8 effectively inhibited the recombination of photogenerated electron–hole pairs with further improved electron utilization efficiency. The superoxide anion, .O2?, generated, greatly improved the photocatalytic activity. The performance of Bi2WO6/ZIF-8 in the photodegradation of tetracycline (TC) was studied under different conditions, including the proportions of ZIF-8, the dosage of catalyst, and the concentration of TC. The results indicated that 10 mg of B/Z/5/1 offered the best photocatalytic activity under UV light, achieving 97.8% degradation of TC (20 mg/L) within 80 min. The measured rate constant (k) for TC degradation was almost 3 times that of pure Bi2WO6. The effects of pH, HA, and inorganic anions on the degradation of TC were also studied for the simulated real water. Further, B/Z/5/1 could be reutilized up to five cycles without reduction of the catalysis performance. Therefore, the Bi2WO6/ZIF-8 heterojunction composite material can be utilized as an efficient photocatalyst for remediation of environmental pollution.
In this work in-situ preparation of novel poly(urethane-imide)/graphene, graphene oxide and reduced graphene oxide nanocomposite is reported by the reaction of 4,4´-diphenylmethane diisocyanate, polypropylene glycol, 3,3’,4,4′-benzophenone tetra carboxylic dianhydride and nanomaterials in the loadings levels of 0.5, 1.5, 2.5, and 3.5 pbw in propylene carbonate as an alternative green solvent. The synthesized poly(urethane-imide) nanocomposite was characterized by Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance spectroscopy (1HNMR), thermogravimetric analysis (TGA), attenuated total reflection (ATR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. The resulting nanocomposite showed enhanced thermal stability when compared with pristine and unfilled poly(urethane-imide) sample. 相似文献
A new AgO.CuO.WO3/rGO nanocomposite was designed for the investigation of the degradation ability of the hybrid material under visible light irradiation. The AgO, CuO, WO3 NPs, and AgO.CuO.WO3 hetero-metallic oxides were fabricated via the chemical co-precipitation method. The crystallite sizes and phase analyses were investigated by recording X-ray diffraction patterns. The crystallite sizes of three metal oxides in the AgO.CuO.WO3 hetero metal oxide were 16.7, 15.9, and 16.9 nm, respectively. The FESEM images at various magnifications were probed to study the morphology of synthesized materials. The micrographs of hetero-metallic oxides AgO.CuO.WO3 exposed that three metal oxides merged like small particles and gives a large bulbous appearance. EDX analyses confirmed the formation of required materials with high purity. FTIR data was in agreement with the literature which facilitated to ensure the purity of synthesized samples. The optical bandgap energy was calculated via the Tauc plot indicating that the blend of three metal oxides generated a new energy level in the electronic structure is suitable for photocatalysis in the presence of visible light. The bandgap energy of hetero metallic oxides was 1.25 eV which is less than individual metal oxides signifying the tuning of the bandgap. The incorporation of rGO in AgO.CuO.WO3 hetero-metallic oxides gives a new photocatalyst for optimum photodegradation of methylene blue in minimum time. The percentage degradation via AgO.CuO.WO3 was 87.20% in 70 min while the percentage degradation via AgO.CuO.WO3/rGO recorded by photocatalytic experiment was 95% in 40 min. The photocatalysis data revealed that AgO.CuO.WO3 hetero-metallic oxides-rGO nanocomposite ensured a strong potential to uptake organic dyes from water by promoting redox reactions during photocatalysis in the minimum time limit. 相似文献
Journal of Inorganic and Organometallic Polymers and Materials - The existence of thiophene (TP) in fuel processing technology is considered a real threat to the environment. So the development of... 相似文献