CAJ | 학술논문

[目的] 将杂多酸固载在载体上制得固载化催化剂.[方法] 以溶胶-凝胶法合成的SiO2作载体,固载磷钨酸制得固载化光催化剂,并对甲基橙溶液进行催化降解、矿化处理.[结果] 在催化剂浓度为4.2 g/L的条件下,光照1.5 h, 4 mg/kg甲基橙溶液的脱色率达到98.8%,但矿化率仅有47.6%;而光照6.0 h后,矿化率可达92.7%.这意味着甲基橙的光催化降解是先发生脱色过程,然后再进一步矿化成CO2,且所制备的光催化剂在没有进行任何处理的条件下,重复使用10次,脱色率依然保持在65%以上.[结论] 成功制备了固载化光催化剂,该固载化磷钨酸光催化剂对甲基橙的光催化降解反应具有较好的催化活性,且对甲基橙溶液的脱色和矿化并不同步.
[목적] 장잡다산고재재재체상제득고재화최화제.[방법] 이용효-응효법합성적SiO2작재체,고재린오산제득고재화광최화제,병대갑기등용액진행최화강해、광화처리.[결과] 재최화제농도위4.2 g/L적조건하,광조1.5 h, 4 mg/kg갑기등용액적탈색솔체도98.8%,단광화솔부유47.6%;이광조6.0 h후,광화솔가체92.7%.저의미착갑기등적광최화강해시선발생탈색과정,연후재진일보광화성CO2,차소제비적광최화제재몰유진행임하처리적조건하,중복사용10차,탈색솔의연보지재65%이상.[결론] 성공제비료고재화광최화제,해고재화린오산광최화제대갑기등적광최화강해반응구유교호적최화활성,차대갑기등용액적탈색화광화병불동보.
[Objective] Heteropolyacid was loaded onto the surface of photocatalytic carrier effectively.[Method] The loaded phosphotungis acid photocatalyst, which prepared by supporting phosphotungis acid on SiO2 carrier synthesized by sol-gel process.The photocatalytic and mineralizable behaviors of the composites were evaluated by degradation of aqueous methyl orange solution under the irradiation of two UV lamps (254 nm).[Results] When the catalyst was irradiated 1.5 h, under the optimum conditions of the initial concentration of the methyl orange solution of 4 mg/kg, catalyst quantity of 4.2 g/L, the decoloring ratio of methyl orange was up to 98.8%,and its ratio of mineralization was up to 47.6%; while irradiated 6.0 h, the mineralizing ratio of methyl orange was up to 98.8% .The loaded catalysts can be reused 10 times and still keep well activity.[Conclusions] The results showed that the loaded phosphotungis acid catalysts revealed well photocatalysic activity on photodegradation of methyl orange, but the rates of decolor and mineralization weren't synchronous.