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采用溶胶-凝胶法制备了纯锐钛矿相的纳米Eu/TiO2粉末,少量铕的掺杂可抑制TiO2晶粒的增长,提高其光催化产氢性能.研究结果表明,铕的掺杂量为5%、煅烧温度为500℃、煅烧时间为2h条件下制备的Eu/TiO2光催化产氢性能最好.以甲酸水溶液为牺牲剂,分别考察Eu/TiO2用量、甲酸初始浓度、溶液pH对产氢过程的影响.结果表明,最佳的Eu/TiO2用量为0.08g/L时,最大氢气产量为204mL;甲酸初始浓度为0.08mol/L,此时每摩尔甲酸的氢气转化率约为5930mL;当溶液pH为3时,甲酸的氢气转化率最高. 相似文献
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以硫酸氧钛和氢氧化钠为主要原料,采用液相沉积法在片状Al粉表面包覆TiO2,制备TiO2/Al颜料,并进一步制得含有该颜料的自清洁涂料。以油酸为污染模拟物,用油酸的分解率作为评价手段,考察反应pH、煅烧温度、涂膜厚度对该涂料自清洁性能的影响。通过XRD仪对颜料结构进行表征,并对颜料的分散性和耐腐蚀性能进行研究。结果表明:在pH为4.5、煅烧温度为600℃条件下TiO2/Al表面的TiO2晶型为锐钛矿型,因而具有最强的自清洁能力。当颜料涂膜厚75μm时,经紫外灯光照3 h后油酸的分解率达到91%。用752S型可见分光光度计于λ=420 nm处分别测得Al粉和TiO2/Al颜料的透光率,来表征其分散性,结果证明Al粉的透光率比TiO2/Al高30%;用浓度0.1 mol/L的HCl溶液进行腐蚀实验,TiO2/Al颜料的耐腐蚀性能显著提高。 相似文献
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铈或钕掺杂TiO2光催化陶瓷及其自洁净抗菌性能研究 总被引:6,自引:0,他引:6
采用溶胶-凝胶法和浸渍提拉法在陶瓷表面覆盖了Ce或Nd掺杂的TiO2薄膜.稀土掺杂量为Ce/TiO2=0.007,Nd/TiO2=0.003(摩尔比)时,铈或钕掺杂TiO2光催化陶瓷分别对甲基橙的降解率最大.稀土掺杂TiO2光催化陶瓷对大肠杆菌的抗菌率高达99%,较纯TiO2光催化陶瓷的91%更高. 相似文献
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Ag^+掺杂TiO2纳米粉体制备及光催化性能研究 总被引:2,自引:0,他引:2
以钛酸四丁酯为原料,利用溶胶凝胶法制备Ag 掺杂TiO2纳米粉体,采用正交实验考察了掺杂量、浓硝酸、冰醋酸、煅烧温度等因素对其制备的影响,从而确定制备工艺最佳条件.通过XRD、TEM、TG-DSC等测试技术对掺杂纳米TiO2粉体进行表征.最佳工艺条件为:掺Ag 量0.5 %(摩尔分数),冰醋酸1mL,浓硝酸0.2mL,煅烧温度450℃,制得颗粒粒径为12.16nm.以甲基橙为降解物,通过自制光催化反应装置,研究了光催化剂的活性,结果表明:Ag 掺杂制备的TiO2纳米粉体具有较高的光催化活性,试验条件下Ag 掺杂TiO2纳米粉体最高降解率为79.38%. 相似文献
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WO3/TiO2薄膜光催化降解ARB性能研究 总被引:5,自引:2,他引:3
采用溶胶-凝胶法,在玻璃珠表面涂覆均匀透明的WO3/TiO2薄膜,并制成光催化反应器对水溶液中酸性红B(ARB)的光催化降解进行了研究。采用XRD对催化剂进行了表征,讨论了催化剂的组成、煅烧温度、酸性红B的起始浓度、pH值、光照时间等因素对光催化反应活性的影响。结果表明:当ω(WO3)=4.0%,煅烧温度为500℃,[ARB]=20 mg.L^-1,pH=7.1,光照时间为8 h时,酸性红B的脱色率可达94.8%。 相似文献
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溶胶-凝胶法制备TiO2薄膜及其对甲醛溶液的光催化性能研究 总被引:1,自引:0,他引:1
以钛酸丁酯和无水乙醇为原料,采用溶胶-凝胶法制备不锈钢网负载型TiO2薄膜来进行对醛溶液的光催化实验.研究了在光催化过程中,分别掺杂不同元素时的降解效率.结果表明,应用此法时PEG-400的投加量为1.5 mL,提拉速度为2 mm/s,锻烧的最佳温度为500 ℃,煅烧的最佳时间为2 h,负载次数为5次时,降解效率最好,降解率达到49.0%. 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献