摘要
以天然鳞片石墨为原料，用改进的Hummers法氧化制备氧化石墨烯，然后用葡萄糖还原制得石墨稀，再用溶胶一凝胶法复合制备了TiO2／2；墨烯的复合材料。用FI-IR、Raman、AFM、SEMvR）3LTGA对石墨烯和TiO2／2；墨烯复合材料进行了表征，并在紫外光照射条件下对比石墨烯、TiO2、TiO：／2；墨烯复合材料对甲基橙的降解效果。结果表明，在紫外光照射下，TiO2的负载率为35％时，TiO2／2；墨烯复合材料光催化降解甲基橙的催化效率明显大于单纯TiO2及石墨烯，光催化4小时后，脱色率达到85％。TiO2／2；墨烯复合材料不失为一种有潜力的光催化降解染料废水催化材料。
The graphite oxide （GO） was prepared from purified natural flake graphite by the modified Hummers method, then graphene sheets （GSs） was prepared by glucose reduction.The composite of titanium dioxide/graphene sheets （TiO2/ GSs） was synthesized by sol-gel method.The features of the composite and graphene sheets were estimated by fourier transform infrared （FT-IR）, Raman spectroscopy （Raman）, atomic force microscopy（AFM）, scanning electron microscopy （SEM）, and thermo gravimetric analyzer（TGA）. The degradation effect of methyl orange on the composites and graphene sheets and titanium dioxide under ultraviolet irradiation were analyzed.h may be concluded that the catalytic efficiency of the composite is obviously higher than those of the graphene or titanium dioxide,when the loading rate of titanium dioxide is 35% under ultraviolet irradiation. After four hours of photochemical catalysis,the decolouring rate of the composite is 85%.The composite of titanium dioxide/graphene sheets is a kind of catalysis material with a great potential to digest the dye wasted water.
出处
《炭素》
2012年第1期40-44,共5页
Carbon
基金
国家自然科学基金（51072125）
