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不同方法制备碳载金催化剂对臭氧的催化分解 被引量:1
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作者 张博 徐九华 +1 位作者 李宏煦 史蕊 《有色金属》 CSCD 北大核心 2011年第1期105-108,共4页
采用浸渍法和溶胶负载法制备以改性活性碳为载体以纳米金为活性组分的催化剂,通过BET,SEM和XPS表征制备方法对催化剂比表面积、孔隙结构、表面形貌及表面元素组成的影响,测试催化剂在室温下对低浓度臭氧的催化分解性能。结果显示,在室温... 采用浸渍法和溶胶负载法制备以改性活性碳为载体以纳米金为活性组分的催化剂,通过BET,SEM和XPS表征制备方法对催化剂比表面积、孔隙结构、表面形貌及表面元素组成的影响,测试催化剂在室温下对低浓度臭氧的催化分解性能。结果显示,在室温,相对湿度为45±5%,空速为96000h-1,臭氧初始浓度为50mg/m3,气体与催化剂的接触时间为0.04 s的条件下,在1200m in时采用浸渍法制备的催化剂对臭氧的分解率为85%,而溶胶负载法制备的催化剂此时对臭氧的分解效率仍在94%以上。采用溶胶负载法制备的催化剂纳米金颗粒粒径更小、更均匀,在催化剂表面的覆盖率更大是其催化活性更高的主要原因。 展开更多
关键词 环境工程 臭氧分解 载金催化剂 浸渍 溶胶负载法
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Enhanced Photocatalytic Properties of Silver Oxide Loaded Bismuth Vanadate 被引量:2
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作者 单连伟 米金波 +2 位作者 董丽敏 韩志东 刘波 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第8期909-913,共5页
In this work, BiV04 powders were synthesized by a sol-gel method, and the BiV04 gels with different calcination temperature were investigated by X-ray diffraction (XRD). Absorption range and band gap energy, which a... In this work, BiV04 powders were synthesized by a sol-gel method, and the BiV04 gels with different calcination temperature were investigated by X-ray diffraction (XRD). Absorption range and band gap energy, which are respon- sible for the observed photocatalyst behavior, were investigated by UV/vis diffuse reflectance spectroscopy (DRS) for pure and silver oxide loaded BiV04. Pbotocatalytic properties of the prepared samples were examined by studying the degradation of the methyl orange. When using NaCI02 as an electron acceptor, the possible photocatalytic mech- anism has been discussed by photocatalytic reactions. With the help of electron acceptor, the results show clearly that the BiV04 loaded silver oxide exhibited superior photocatalytic activity in simulated dye wastewater treatment. 展开更多
关键词 Bismuth vanadate Photocatalytic properties Sol-gel method
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