浓HNO3和酸性K2Cr2O7都具有一定的氧化性,分别利用浓HNO3和酸性K2Cr2O7对阳极碳布进行氧化改性处理。通过红外光谱测试显示,碳布表面附着了羟基(—OH)和羧基(—COOH)。通过扫描电镜观察,碳布经过氧化改性后表面明显变粗糙。同时,循环伏...浓HNO3和酸性K2Cr2O7都具有一定的氧化性,分别利用浓HNO3和酸性K2Cr2O7对阳极碳布进行氧化改性处理。通过红外光谱测试显示,碳布表面附着了羟基(—OH)和羧基(—COOH)。通过扫描电镜观察,碳布经过氧化改性后表面明显变粗糙。同时,循环伏安曲线(CV)和交流阻抗曲线(EIS)测试表明,经过改性后的碳布具有良好的电化学特性。分别以经过浓HNO3和酸性K2Cr2O7改性处理后的碳布作为微生物燃料电池(MFC)的阳极,获得的最大功率密度分别为291.11 m W·m-2和438.08 m W·m-2,比未经过改性处理的碳布阳极的功率密度分别提升了21%和82%。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
The mesoporous photocatalyst InVO4 was synthesized by the template-directing self-assembling method.The synthesized InVO4 was characterized by means of X-ray diffraction,transmission electron microscopy,N2 adsorption,...The mesoporous photocatalyst InVO4 was synthesized by the template-directing self-assembling method.The synthesized InVO4 was characterized by means of X-ray diffraction,transmission electron microscopy,N2 adsorption,and ultraviolet-visible spectroscopy.The results showed that the crystal structure of InVO4 could be controlled by changing the calcination temperature.Compared with the anatase TiO2 and conventional InVO4,the mesoporous InVO4 was more responsive toward visible light.The evolution rate of H2 from water over the mesoporous InVO4 achieved（1?836） μmol/（g·h） under UV light irradiation, which was much higher than the anatase TiO2 and conventional InVO4.展开更多
文摘浓HNO3和酸性K2Cr2O7都具有一定的氧化性,分别利用浓HNO3和酸性K2Cr2O7对阳极碳布进行氧化改性处理。通过红外光谱测试显示,碳布表面附着了羟基(—OH)和羧基(—COOH)。通过扫描电镜观察,碳布经过氧化改性后表面明显变粗糙。同时,循环伏安曲线(CV)和交流阻抗曲线(EIS)测试表明,经过改性后的碳布具有良好的电化学特性。分别以经过浓HNO3和酸性K2Cr2O7改性处理后的碳布作为微生物燃料电池(MFC)的阳极,获得的最大功率密度分别为291.11 m W·m-2和438.08 m W·m-2,比未经过改性处理的碳布阳极的功率密度分别提升了21%和82%。
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.
文摘The mesoporous photocatalyst InVO4 was synthesized by the template-directing self-assembling method.The synthesized InVO4 was characterized by means of X-ray diffraction,transmission electron microscopy,N2 adsorption,and ultraviolet-visible spectroscopy.The results showed that the crystal structure of InVO4 could be controlled by changing the calcination temperature.Compared with the anatase TiO2 and conventional InVO4,the mesoporous InVO4 was more responsive toward visible light.The evolution rate of H2 from water over the mesoporous InVO4 achieved（1?836） μmol/（g·h） under UV light irradiation, which was much higher than the anatase TiO2 and conventional InVO4.
基金supported by the National Natural Science Foundation of China (21077007)the Discipline and Postgraduate Education Foundation (005000541212014)+1 种基金the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (PHR201107104)Hong Kong Baptist University Foundation (FRG2/09‐10/023)~~
