G-C_3N_4/CeO_2光催化剂的制备及其还原CO_2的性能研究

Preparation of g-C_3N_4/CeO_2 Photocatalysts and Their Performance for Photoreduction of CO_2

环境和能源问题是人类在21世纪面临的两个重大问题。利用有效的光催化剂将CO_2催化转化为碳氢燃料既有利于改善环境,又可以缓解能源问题。将类石墨相氮化碳(g-C_3N_4)与氧化铈(Ce O2)复合形成异质结复合材料作为光催化剂。利用XRD、TEM、FT-IR、DRS、光致发光等手段对制备的光催化剂进行表征,表征结果表明中空氧化铈纳米球分布在g-C_3N_4表面,引进氧化铈增强g-C_3N_4的光学性能;在可见光条件下进行光催化还原CO_2的实验,光催化结果表明,氧化铈的引进提高了g-C_3N_4的光催化效率。

Environment and energy issues were two major problems for human in the 21st century. Using effective photocatalysts to convert CO2 to hydrocarbon fuels is an effective method to solve the problems. In this work, graphene carbon nitride combined with cerium oxide was used to construct hetero-junction composite materials as photocatalysts. The samples were characterized by XRD, TEM, FT-IR, DRS, and photoluminesenee, et al. The characterization results indicated that hollow cerium oxide was distributed on the surface of g-C3N4 nanosheets, and introduced cerium oxide enhanced the optical properties of g-C3N4; The experiment of photoreduction CO2 was carried out under visible light. The results showed that the photocatalytic efficiency was improved after introduction cerium oxide.