石墨烯由于其大的比表面积和良好的电子传输特性,在光催化领域具有巨大的应用潜力.本文通过水热法原位合成制备得到CuO/TiO2/煤基石墨烯复合材料(CTG),采用XRD、SEM、TEM等手段对样品结构、形貌等进行了表征和分析;进而以CuO/TiO2/煤基石墨烯复合材料为光催化剂,在可见光条件下还原CO2制备甲醇以考察其光催化性能.结果表明,CuO/TiO2/煤基石墨烯复合材料具有良好的光催化活性,当其中Cu的负载量为2％(质量分数)时,目标产物甲醇的产率最高可达94.79 μmol/g.cat,为同样条件下单独采用煤基石墨烯作为光催化剂时甲醇产率的5倍.
In this paper,we report a facile hydrothermal method toward in situ growth of ultradispersed CuO/TiO2 nanoparticles on coal-based graphene composites (CTG).The structure and morphology of composite materials were characterized by XRD,SEM and TEM,respectively.Then,the photocatalytic performance of CTG was evaluated based on photocatalytic reduction of CO2 to methanol under visible light irradiation.The results showed that the yield of product methanol was highest when Cu contained in CuO/TiO2/coal-based graphene composite was 2％ (mass fraction) which showed a 5 fold increase in methanol production activity (94.79 μmol/g.cat) in comparison with coal-based graphene(19.05 μmol/g.cat) under the same conditions.
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