CAJ | 학술논문

采用溶胶-凝胶法制备了二氧化硅负载H_3PW_(12)O_(40)催化剂,并采用红外光谱、XRD及BET对其进行了表征.研究了其对水中苯酚的光催化降解性.讨论了负载催化剂用量、光照时间对苯酚和TOC去除率的影响.结果表明:PW_(12)/SiO_2负载型催化剂用量为3g/L,光照6h,10mg/L苯酚水溶液中苯酚去除率为93.06%,TOC去除率为73.20%.PW_(12)/SiO_2多相光催化10mg/L苯酚水溶液降解反应和苯酚水溶液直接光解反应均为一级动力学反应.
채용용효-응효법제비료이양화규부재H_3PW_(12)O_(40)최화제,병채용홍외광보、XRD급BET대기진행료표정.연구료기대수중분분적광최화강해성.토론료부재최화제용량、광조시간대분분화TOC거제솔적영향.결과표명:PW_(12)/SiO_2부재형최화제용량위3g/L,광조6h,10mg/L분분수용액중분분거제솔위93.06%,TOC거제솔위73.20%.PW_(12)/SiO_2다상광최화10mg/L분분수용액강해반응화분분수용액직접광해반응균위일급동역학반응.
PW_(12)/SiO_2 is prepared with polyoxometalate (H_3PW_(12)O_(40)) with Keggin structure, which is immobilized into a silica matrix by means of sol-gel technique, is used as a sort of catalyst in photocatalytic degradation of phenol in water, which is then characterized by infra-red spectrum, XRD and BET. This paper describes a bench scale study in this way and the result shows that 10mg/L of phenol in water is removed by 93.06% under the photocatalysis condition: 3g/L of PW_(12)/SiO_2in solution, 6 hours of illumination. It is also concluded that the reactions of phenol photocatalytic degradation either with or without PWL_(12)/SiO_2 follow the fwst-order kinetics.