共搜索到356条信息，每页显示10条信息，共36页。用时：0小时0分0秒614毫秒
, the degradation rate reaches 97% in 15 min. Key words: industrial titanium sulphate solution; N-doped TiO2; urea; visible light; photocatalysis ...?4. b. 在煅烧过程中,氮取代TiO2中的晶格氧,导致氮掺杂样品较空白样品在可将光范围内均有明显的吸收,红移明显. c. 在可见光下,氮掺杂TiO2对甲基橙具有较强的光催化活性,反应15 min可使甲基橙脱色率达到97%,而未掺杂TiO2几乎没有作用. 参考文献: [1] Fujishima A, Honda K. Electrochemical photocatalysis......
of photocatalysis that need to be solved. TiO2 is a high band gap (Eg≈3.2 eV) material that can only be excited by high energy UV radiation with a wavelength of no longer than 387.5 nm [4]. But the content...): 101-106. [7] LINSEBIGLER A L, LU G, YATES J T. Photocatalysis on TiO2 surfaces: Principles, mechanisms, and selected results [J]. Chem Rev, 1995, 95(3): 735-758. [8] YANG Hai-gui, DAI Zhen-wen, SUN Zhi-wei......
M, BAHNEMANN W. Understanding TiO2 photocatalysis: Mechanisms and materials[J]. Chemical Reviews, 2014, 114(19): 9919-9986. [4] OHNO T, SARUKAWA K, MATSUMURA M. Crystal faces of rutile and anatase... TiO2, nanocrystals with exposed {001} facets for improved visible light photocatalytic activity[J]. Applied Catalysis B Environmental, 2014, 147(7): 958-964. [17] LINSEBIGLER A L. Photocatalysis on TiO2......
; trichloromethane; transition metal ions; co-doping; photocatalysis 氯化消毒以其工艺简单, 经济实用, 杀菌效果好而成为一般水厂净化水质的主要手段. 但是饮用水氯化后会产生以三氯甲烷为主的有机氯化物[1]. 这些物质大多具有致癌性, 故饮用水的氯化对人体健康的影响越来越被人们所关注[2]. TiO2光......
; photocatalysis 纳米钛基材料因其具有特殊的性能和广泛的用途而备受各国科研人员的青睐[1-5],并已被成功地应用于各个领域,如光催化,锂离子电池和太阳能电池[6-7].纳米钛基材料的电子传导性能,光催化能力等物化特性强烈地依赖于其晶体结构,粒径,形貌和微结构等特征.为有效控制纳米钛基材料的晶型和结构,JUNG等[8-14]尝试采用多种不同的物理或化学的手段,如模板法,水热和溶剂热法,各向异性腐蚀,溶胶-凝胶法......
......
纳米ZnO薄膜的制备及其光催化性能郑磊1,鲁道荣1,黄长萍1,吴素贞1(1.安徽省合肥市合肥工业大学化学工程学院)摘 要:采用溶胶-凝胶法制备纳米ZnO,用X射线衍射仪和透射电镜表征纳米ZnO的结构和形貌,制成薄膜研究其光催化性能.结果表明,在450~650℃范围内,随着焙烧温度增加,ZnO的结晶度和晶粒尺寸均增大.纳米ZnO的光催化性能在焙烧温度为650℃时较好.ZnO薄膜(4 cm×2 cm)光催化氧化降解苯酚溶液的适宜条件为苯酚溶液初始浓度0.145g/L,H2O2(30%)用量70.0mL/L,膜的纳米......
掺杂稀土金属对含钛高炉渣光催化性能影响周密1,杨合1,卜二军1,薛向欣1,杨泽健1(1.辽宁省沈阳市东北大学材料与冶金学院)摘 要:含钛高炉渣作为一种光催化材料其量子利用率以及对太阳能的利用率都很低,考虑到稀土元素由于其特殊的电子结构在形成氧化物时具有良好的半导体特性,其金属氧化物的掺杂能在一定程度上改良含钛高炉渣的光催化性能的特点,将掺杂稀土氧化物的含钛高炉渣用于紫外线照射条件下亚甲基蓝溶液的降解试验中,并通过射线衍射(XRD),扫描电子显微镜(SEM)等分析手段检测寻找最佳稀土元素掺杂量.试验结果表明:稀土......
investigated, demonstrating that the kinetics of RhB degradation follows apparent first-order kinetics and fits the Langmuir-Hinshelwood model. Key words: microstructure; semiconductors; photocatalysis; BiOX 1 Introduction Degrading organic compounds and splitting water into hydrogen by photocatalysis is considered as a safe, cost-effective, and "green" technology, which has received global attention......
......
