【作者】 胥利先； 桑丽霞； 戴洪兴； 马重芳；

【Author】 XU Li-xian SANG Li-xia DAI Hong-xing MA Chong-fang (Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education of China,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100022,China)

【机构】 北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室；

【摘要】 为了提高光催化分解 H₂O制 H₂的效率,采用模板水热法合成 SBA-15介孔分子筛,并以 SBA-15为模板制备 InV₄/SBA-15光催化剂,采用 XRD、HRSEM、TEM、SAED、BET 以及 UV-VIS 技术对样品的表面形貌、晶相组成、比表面积和吸光性进行表征,讨论煅烧温度和负载量对催化剂物理性质的影响。结果表明:介孔 SBA-15具有高度发达的有序孔结构,比表面积在780 m²/g 以上;通过控制煅烧温度,可以制备不同晶形的 InVO₄/SBA-15光催化剂;600℃煅烧时30%InVO₄/SBA-15具有最佳的介孔结构,比表面积较大（约251.45 m²/g）, 此时 InVO₄平均粒径较小（≤10nm）,且均匀分布在 SBA-15表面:与 P25及体相 InVO₄催化剂相比,InVO₄/SBA-15 催化剂在可见光区的吸光性能显著改善,50%InVO₄/SBA-15的吸光性能最佳。更多还原

【Abstract】 To improve the efficiency of photocatalytic water decomposition,SBA-15 mesoporous molecular sieve was prepared by templating hydrothermal synthesis and InVO₄/SBA-15 photocatalyst was synthesized using the SBA-15 as template.The morphologies,crystal structures,surface areas,and photon absorption properties of the synthesized SBA-15 and InVO₄/SBA-15 were characterized by XRD,HRSEM,TEM,SAED,BET and UV-Vis techniques, respectively.The effects of InVO₄-loading and calcination temperature on the catalyst physical properties were studied. The results indicate that the synthesized mesoporous SBA-15 possesses well-defined ordered pore structures with surface areas above 780 m²/g.InVO₄/SBA-15 with different crystal structures can be selectively obtained by changing the calcination temperature.Calcined at 600℃,30%InVO₄/SBA-15 sample possesses the best mesoporous structure with a surface area as large as 251.45 m²/g.The average particle size of InVO₄ is small （≤10 nm） and it scatters on the surface of SBA-15 uniformly.Compared with P25 and bulk InVO₄,the light absorbance ability of InVO₄/SBA-15 is much improved in visible light region,and the 50% loading InVO₄/SBA-15 has the best visible light respondence ability.更多还原