CAJ | 학술논문

采用溶胶—凝胶法制备掺锌纳米TiO2光催化剂,用XRD、SEM等方法表征了催化剂的晶体结构及表面形貌,并实验研究了光催化去除水中腐殖酸的能力。结果表明：Zn2＋掺杂能够提高纳米TiO2的光催化活性,当掺锌量为2%时,焙烧温度为500℃,制备的催化剂活性较好。当腐殖酸浓度为10 mg/L,溶液pH=6.5,催化剂投加量为2 g/L时,在紫外灯光照射3 h下,掺锌量为2%的纳米TiO2对水中腐殖酸的降解率可达94.19%。
채용용효—응효법제비참자납미TiO2광최화제,용XRD、SEM등방법표정료최화제적정체결구급표면형모,병실험연구료광최화거제수중부식산적능력。결과표명：Zn2＋참잡능구제고납미TiO2적광최화활성,당참자량위2%시,배소온도위500℃,제비적최화제활성교호。당부식산농도위10 mg/L,용액pH=6.5,최화제투가량위2 g/L시,재자외등광조사3 h하,참자량위2%적납미TiO2대수중부식산적강해솔가체94.19%。
Zn doped nano-TiO2 photo-catalyst based on the doping modification was prepared by the sol-gel method, and was characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The pho- to-catalytic activity of Zn-doped TiO2 on degradation of humic acid was experimentally studied. The results showed that the addition of Zn〉 to TiO2 enhanced its photocatalytic activity, and the catalyst activity was better when the doped zinc was 2% and the calcination temperature was 500℃. When the humic acid concentration was 10 mg/L, solution pH=6.5, catalyst dosage 2 g/L, UV light irradiation 3 h, and doped zinc 2%, the nano-TiO2 degradation rate of humic acid in water was up to 94.19%.