【摘 要】
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Porous α-Fe2O3 was synthesized by a simple hydrothermal treatment of FeCl3 aqueous solution followed by a calcination process.In the synthesis of porous α-Fe2
【机 构】
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Petroleum & Chemistry Engineering Department,TKL of Metal-and Molecule-Based Material Chemistry and
【基金项目】
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This work was financially supported by the National Natural Science Foundation of China;the Science and Technology Commission Foundation of Tianjin
论文部分内容阅读
Porous α-Fe2O3 was synthesized by a simple hydrothermal treatment of FeCl3 aqueous solution followed by a calcination process.In the synthesis of porous α-Fe2O3,no templates or pore-directing agents were used.The as-prepared porous α-Fe2O3 was further employed as a support for loading Pt nanoparticles.The gas sensing performance of the obtained porous α-Fe2O3-supported Pt to VOCs was investigated.The sensor presented a high response and fast response-recovery characteristic to several VOCs including acetone,ether,methanol,ethanol,butanol and hexanol.Meanwhile,it exhibited a much higher response than the pure α-Fe2O3 at the operating temperature of 260℃.The enhanced sensing properties may be related to the unique porous structure of the α-Fe2O3 support and the promoting effect of active Pt nanoparticles for the sensing reactions.
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