CAJ | 학술논문

采用水热法，以钛酸四正丁酯及氧化石墨烯（GO）为原料，在水性体系中合成了一系列具有不同 GO质量分数的TiO2/GO复合光催化剂。FE-SEM分析结果表明，分散的钛酸四正丁酯以多分子层的形式吸附到氧化石墨烯的表面，最后在水热过程中转化为锐钛型 TiO2粒子。当氧化石墨烯的质量分数低于3%时，产物中含有纯TiO2微球及TiO2/GO复合物；当氧化石墨烯质量分数大于5%时，产物为单纯的TiO2/GO复合物。电化学性能测试结果表明，GO复合后，TiO2电极中载流子的传输效率提高。氧化石墨烯复合量为10%时，复合光催化剂显示了对亚甲基蓝最佳的光催化活性。当复合氧化石墨烯转化为石墨烯后，其光催化活性可得到进一步大幅度的提高。
채용수열법，이태산사정정지급양화석묵희（GO）위원료，재수성체계중합성료일계렬구유불동 GO질량분수적TiO2/GO복합광최화제。FE-SEM분석결과표명，분산적태산사정정지이다분자층적형식흡부도양화석묵희적표면，최후재수열과정중전화위예태형 TiO2입자。당양화석묵희적질량분수저우3%시，산물중함유순TiO2미구급TiO2/GO복합물；당양화석묵희질량분수대우5%시，산물위단순적TiO2/GO복합물。전화학성능측시결과표명，GO복합후，TiO2전겁중재류자적전수효솔제고。양화석묵희복합량위10%시，복합광최화제현시료대아갑기람최가적광최화활성。당복합양화석묵희전화위석묵희후，기광최화활성가득도진일보대폭도적제고。
A series of titania/graphene oxide (TiO2/GO) composite photocatalysts with different mass fractions of graphene oxide were prepared in an aqueous system by hydrothermal method,using tetrabutyl titanate and graphene oxide as starting raw materials. FE-SEM results show that the TBOT is adsorbed on graphene oxide surface in multimolecular layer,and finally transformed into anatase TiO2 during hydrothermal process. When the mass fraction of graphene oxide is below 3%,the product photocatalyst consists of pure TiO2 and TiO2/GO composite. As the graphene oxide content exceeds 5%,the product consists of only TiO2/GO composite. The results of electrochemical measurement indicate that the carrier transport efficiency in TiO2 electrode increases after TiO2 is combined with GO. As the mass fraction of graphene oxide reaches 10%,the composite photocatalyst shows the highest photocatalytic activity for methylene. The photocatalytic activity can be further greatly enhanced after the bound graphene oxide is reduced to graphene.