摘要
以自制氧化石墨烯和钛酸丁酯为主要原料,用溶胶-凝胶法制备TiO2/GO纳米复合材料,采用FT-IR、XRD、Raman等对其结构进行了表征,然后以K2Cr2O7溶液为预处理废水,研究纳米复合材料对Cr6+的光催化还原性能.实验结果表明,GO纳米复合材料中生成了锐钛矿型TiO2球形颗粒,在紫外光下纳米复合材料能将Cr6+还原为Cr3+,含5%GO的TiO2/GO复合材料100min内对Cr6+的还原率可达91%,研究结果对于含有危害较大的Cr6+废水的高效快速处理具有潜在的应用价值.
TiO2/graphene oxide（TiO2/GO）nanocomposites have been successfully synthesized through sol-gel method using homemade GO and tetrabutyl titanate as starting materials.The structure of nanocomposites was characterized by Fourier transform infrared spectroscopy（FTIR）,X-ray diffraction（XRD）,Raman spectroscopy.K2Cr2O7 solution as pretreatment waste water,photocatalytic reduction of hexavalent chromium was researched.The results show that the anatase TiO2 spherical particles were produced in the nanocomposites,and the nanocomposites could reduce Cr6＋to Cr3＋in ultraviolet light.The TiO2/GO nanocomposites with the content of 5% GO could make the reduction rate reach 91% within 100 minutes.The result has great potential for application in quickly and efficient treating the waste water contained with toxic Cr6＋.
出处
《陕西科技大学学报（自然科学版）》
2015年第4期51-55,共5页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(21276152)
关键词
氧化石墨烯
TIO2
光催化还原
Cr6+
graphene oxide
TiO2
photocatalytic reduction
hexavalent chromium
