CAJ | 학술논문

本研究采用均匀沉淀法，用磷酸和硝酸钙制备出羟基磷灰石（HAP ）粉末，冷压成型、烧结，得到块状HAP催化剂载体；采用改性溶胶凝胶法制备出TiO2凝胶，再用浸渍－煅烧的方法，制备出成型HAP负载TiO2光催化剂（TiO2／HAP），该催化剂应用于甲基橙溶液的光催化降解。探讨了负载次数、初始浓度、初始pH值等因素对反应的影响。结果表明，试验条件下，催化剂的负载次数以3次为宜；TiO2／HAP催化剂上甲基橙的降解符合一级反应动力学，酸性和强碱性条件下，甲基橙降解较快；所制备的TiO2／HAP催化剂稳定性好，具有较好的应用前景。
본연구채용균균침정법，용린산화초산개제비출간기린회석（HAP ）분말，냉압성형、소결，득도괴상HAP최화제재체；채용개성용효응효법제비출TiO2응효，재용침지－단소적방법，제비출성형HAP부재TiO2광최화제（TiO2／HAP），해최화제응용우갑기등용액적광최화강해。탐토료부재차수、초시농도、초시pH치등인소대반응적영향。결과표명，시험조건하，최화제적부재차수이3차위의；TiO2／HAP최화제상갑기등적강해부합일급반응동역학，산성화강감성조건하，갑기등강해교쾌；소제비적TiO2／HAP최화제은정성호，구유교호적응용전경。
In this work ,Hydroxyapatite power is prepared by homogeneous precipitation method from phosphoric acid and calcium nitrate as raw materials and the bulk HAP carrier is achieved after cold pressing agglomeration and sintering .Titani-um dioxide sol is prepared by the modified sol -gel method ,then ,the TiO2/HAP composite catalyst is obtained ,following the impregnation and calcination technology ,which is applied in the degradation of methyl orange .The effects of load times of catalyst ,initial concentration of methyl orange and initial pH of solution on the reaction are investigated .Results show that 3 load times of catalyst during the preparation is appropriate in this study ,photo-degradation of methyl orange on the TiO2/HAP catalyst fits the first order kinetics and the degradation of methyl orange is fast when the solution at acid or strong basic stage .The prepared TiO2/HAP composite catalyst with good stability has a promising application prospect .