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以Cu(NO_3)_2·3H_2O和Ce(NO_3)_3·6H_2O为改性剂,采用溶胶-凝胶法制备Cu-Ce/TiO_2。利用XRD、LPSA、SEM、BET、UV-Vis和DVS对Cu-Ce/TiO_2的物质组成、粒度分布、微观形貌、孔结构和光学性能进行表征。结果表明,Cu-Ce/TiO_2具有大量锐钛矿型TiO_2,促使其吸收边带呈现明显的拓展与红移。Cu-Ce/TiO_2呈现较为规则的球状且结构致密,其粒径较大且局部出现团聚。Cu-Ce/TiO_2的比表面积为107.06m2/g、孔体积为0.1268~0.1354mL/g、平均孔直径为4.29~5.47nm,具有良好的孔结构。Cu-Ce/TiO_2在4h的甲醛降解效率为50.9%,在相对湿度35%~75%的平衡含湿量为0.0143~0.1005g/g,具有良好的光催化性能与吸放湿性能。
Cu-Ce / TiO_2 was prepared by sol-gel method using Cu (NO_3) _2 · 3H_2O and Ce (NO_3) _3 · 6H_2O as modifiers. The composition, particle size distribution, micro-morphology, pore structure and optical properties of Cu-Ce / TiO 2 were characterized by XRD, LPSA, SEM, BET, UV-Vis and DVS. The results show that Cu-Ce / TiO 2 has a large amount of anatase TiO 2, which leads to the obvious expansion and red shift of the absorption edge. Cu-Ce / TiO 2 has a regular spherical shape and dense structure, and its particle size is larger and locally agglomerated. The specific surface area of Cu-Ce / TiO 2 is 107.06m 2 / g, the pore volume is 0.1268 ~ 0.1354mL / g, the average pore diameter is 4.29 ~ 5.47nm, and has good pore structure. The formaldehyde degradation efficiency of Cu-Ce / TiO_2 was 50.9% at 4h, and the equilibrium moisture content was 0.0143 ~ 0.1005g / g at relative humidity of 35% -75%. It had good photocatalytic performance and moisture absorption and desorption performance.