Department of Chemistry, MPMM SN Trusts College, Shoranur, Kerala, 679122, India.
Department of Applied Chemistry, Cochin University of Science and Technology, Cochin, Kerala, 682022, India.
Environ Sci Pollut Res Int. 2018 Jul;25(21):20510-20517. doi: 10.1007/s11356-017-0350-2. Epub 2017 Oct 23.
The current study focused on pollution control by titania through photocatalytic degradation of aldicarb pesticide in aqueous medium. Titania, which is an efficient photocatalyst, can bring about degradation of aqueous organic pollutants under UV and visible light irradiation. Here, we prepared titania by sol-gel method from titanium tetraisopropoxide and doped non-metals like N and S from sources such as urea and thiourea, respectively. The prepared catalyst was characterized by XRD, UV-Vis.DRS, TEM, XPS, etc. Photocatalytic activity of the catalyst was evaluated from extend of degradation of aldicarb pesticide by measuring its concentration with the help of HPLC. It was found that the modified catalyst showed better photocatalytic degradation than pure titania in visible light.
本研究通过光催化降解水中的涕灭威农药来实现二氧化钛的污染控制。二氧化钛作为一种高效的光催化剂，可以在紫外光和可见光照射下使水中的有机污染物发生降解。在这里，我们采用钛四异丙醇酯的溶胶-凝胶法，分别从尿素和硫脲等来源中掺杂 N 和 S 等非金属元素来制备二氧化钛。通过 X 射线衍射（XRD）、紫外可见漫反射光谱（UV-Vis.DRS）、透射电子显微镜（TEM）、X 射线光电子能谱（XPS）等手段对所制备的催化剂进行了表征。借助高效液相色谱法（HPLC）测定涕灭威农药的浓度，评估了催化剂的光催化活性。结果表明，改性催化剂在可见光下的光催化降解性能优于纯二氧化钛。
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