CAJ | 학술논문

分别采用共沉淀法和溶胶-凝胶法制备了ZnFe_2O_4和掺杂ZnFe_2O_4的纳米级TiO_2光催化剂,进行了XRD、TEM和UV visDRS表征,以卤素灯为光源对纳米TiO_2降解水溶液中乙酰甲胺磷农药进行了研究.考察了反应液初始pH值、催化剂用量、H_2O_2用量对降解率的影响.实验结果表明,焙烧温度为400℃、掺杂量为0.5%的ZnFe_2O_4/TiO_2纳米粉体降解效果最佳,在相同条件下,反应2h后农药降解率可比纯TiO_2提高20%左右.正交实验优化了降解反应条件,在常温常压下,起始pH值为12、H_2O_2浓度为12mmol/L、催化剂浓度为0.5g/L、反应3h后,初始浓度为1.0×10~(-4)mol/L的乙酰甲胺磷农药降解率可达61.2%.
분별채용공침정법화용효-응효법제비료ZnFe_2O_4화참잡ZnFe_2O_4적납미급TiO_2광최화제,진행료XRD、TEM화UV visDRS표정,이서소등위광원대납미TiO_2강해수용액중을선갑알린농약진행료연구.고찰료반응액초시pH치、최화제용량、H_2O_2용량대강해솔적영향.실험결과표명,배소온도위400℃、참잡량위0.5%적ZnFe_2O_4/TiO_2납미분체강해효과최가,재상동조건하,반응2h후농약강해솔가비순TiO_2제고20%좌우.정교실험우화료강해반응조건,재상온상압하,기시pH치위12、H_2O_2농도위12mmol/L、최화제농도위0.5g/L、반응3h후,초시농도위1.0×10~(-4)mol/L적을선갑알린농약강해솔가체61.2%.
ZnFe_2O_2 and ZnFe_2O_2 doped TiO_2 nanoparticles were prepared by coprecipitation and sol-gel methods respectively, characterized by means of XRD, TEM and UV-visDRS. Photodegradation of acephate pesticide in aqueous solution by nano-sized TiO_2 process was studied, which was irradiated by a 500w halogen lamp. The effect of factors including initial pH value, catalyst dosage and concentration of H_2O_2 were investigated. Results showed that TiO_2 nanoparticles which was baked under 400℃ and intermingled with 0.5% ZnFe_2O_4 had the best degradation effect, degradation efficiency of pesticide can be improved about 20% relative to pure TiO_2 nanomaterials after 2h under the same conditions. Conditions that affect the degradation efficiency of organophosphorus pesticide were optimized by orthogonal experiment. In the optimal conditions with the initial pH 12, concentration of H_2O_2 12mmol/L and concentration of catalyst 0.5g/L, degradation rate of acephate pesticide with the initial concentration of 1.0×10~(-4)mol/L can reach up to 61.2%.