采用均匀沉淀法制备了锐钛型二氧化钛,然后在适当酸度、DBS浓度、处理温度及反应物浓度环境下将二氧化钛进行了处理,对处理后样品进行了XRD、N_2吸附、粒度分析表征样品的结构、晶体形貌、物性情况及粒度分布情况,发现二氧化钛物性情况...采用均匀沉淀法制备了锐钛型二氧化钛,然后在适当酸度、DBS浓度、处理温度及反应物浓度环境下将二氧化钛进行了处理,对处理后样品进行了XRD、N_2吸附、粒度分析表征样品的结构、晶体形貌、物性情况及粒度分布情况,发现二氧化钛物性情况有较为明显的改善,处理后的TiO_2样品比表面积达346 m^2·g^(-1),孔容达0.31 m L·g^(-1),TiO_2粒子平均粒径不大于10 nm。展开更多
Most of volatile organic compounds (VOCs) are harmful to the atmosphere and human health. Cata‐lytic combustion is an effective way to eliminate VOCs. The key issue is the availability of high per‐formance catalys...Most of volatile organic compounds (VOCs) are harmful to the atmosphere and human health. Cata‐lytic combustion is an effective way to eliminate VOCs. The key issue is the availability of high per‐formance catalysts. Many catalysts including transition metal oxides, mixed metal oxides, and sup‐ported noble metals have been developed. Among these catalysts, the porous ones attract much attention. In this review, we focus on recent advances in the synthesis of ordered mesoporous and macroporous transition metal oxides, perovskites, and supported noble metal catalysts and their catalytic oxidation of VOCs. The porous catalysts outperformed their bulk counterparts. This excel‐lent catalytic performance was due to their high surface areas, high concentration of adsorbed oxy‐gen species, low temperature reducibility, strong interaction between noble metal and support and highly dispersed noble metal nanoparticles and unique porous structures. Catalytic oxidation of carbon monoxide over typical catalysts was also discussed. We made conclusive remarks and pro‐posed future work for the removal of VOCs.展开更多
文摘采用均匀沉淀法制备了锐钛型二氧化钛,然后在适当酸度、DBS浓度、处理温度及反应物浓度环境下将二氧化钛进行了处理,对处理后样品进行了XRD、N_2吸附、粒度分析表征样品的结构、晶体形貌、物性情况及粒度分布情况,发现二氧化钛物性情况有较为明显的改善,处理后的TiO_2样品比表面积达346 m^2·g^(-1),孔容达0.31 m L·g^(-1),TiO_2粒子平均粒径不大于10 nm。
基金supported by the National High Technology Research and Development Program (863 Program,2015AA034603)the National Natural Science Foundation of China (21377008,201077007,20973017)+1 种基金Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal InstitutionsScientific Research Base Construction-Science and Technology Creation Platform National Materials Research Base Construction~~
文摘Most of volatile organic compounds (VOCs) are harmful to the atmosphere and human health. Cata‐lytic combustion is an effective way to eliminate VOCs. The key issue is the availability of high per‐formance catalysts. Many catalysts including transition metal oxides, mixed metal oxides, and sup‐ported noble metals have been developed. Among these catalysts, the porous ones attract much attention. In this review, we focus on recent advances in the synthesis of ordered mesoporous and macroporous transition metal oxides, perovskites, and supported noble metal catalysts and their catalytic oxidation of VOCs. The porous catalysts outperformed their bulk counterparts. This excel‐lent catalytic performance was due to their high surface areas, high concentration of adsorbed oxy‐gen species, low temperature reducibility, strong interaction between noble metal and support and highly dispersed noble metal nanoparticles and unique porous structures. Catalytic oxidation of carbon monoxide over typical catalysts was also discussed. We made conclusive remarks and pro‐posed future work for the removal of VOCs.