Preparation and performances of nanosized Ta2O5 powder photocatalyst
Preparation and performances of nanosized Ta2O5 powder photocatalyst
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DOI：
10.1016/j.jssc.2004.11.015
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发表时间：
2005
影响因子：
3.3
通讯作者：
Yongfa Zhu;Fang Yu;Y. Man;Qingyong Tian;Yu He;N. Wu
中科院分区：
文献类型：
--
作者：
Yongfa Zhu;Fang Yu;Y. Man;Qingyong Tian;Yu He;N. Wu
以Tacl{sub5}丁醇溶液为前驱体，采用溶胶-凝胶法成功地合成了纳米级Ta2Osub5}粉末光催化剂。在500℃以下可以形成Ta{sub2}O{sub5}个物种。C通过前体的分解。Ta{sub2}O{sub5}粉末光催化剂经600℃以上焙烧即可得到晶相。C反应4h。Ta{sub2}O{sub5}粉末光催化剂的晶体尺寸和颗粒尺寸约为50 nm。纳米Ta{sub2}O{sub5}粉末对气态甲醛具有良好的光催化降解性能。Ta{sub2}O{sub5}粉末在700℃时形成。C在650℃下放置4h。C处理12h效果最好。焙烧温度和时间对纳米Ta{sub2}O{sub5}粉末的晶化和光催化性能有重要影响。
Nanosized-Ta{sub 2}O{sub 5} powder photocatalyst was successfully synthesized by using sol-gel method via TaCl{sub 5} butanol solution as a precursor. Ta{sub 2}O{sub 5} species can be formed under 500 deg. C via the decomposition of the precursor. The crystalline phase of Ta{sub 2}O{sub 5} powder photocatalyst can be obtained after being calcined above 600 deg. C for 4h. The crystal size and particle size of Ta{sub 2}O{sub 5} powder photocatalyst was about 50nm. A good photocatalytic performance for the degradation of gaseous formaldehyde was obtained for the nanosized-Ta{sub 2}O{sub 5} powder. The Ta{sub 2}O{sub 5} powder formed at 700 deg. C for 4h and at 650 deg. C for 12h showed the best performance. The calcination temperature and time play an important role in the crystallization and photocatalytical performance of nanosized-Ta{sub 2}O{sub 5} powder.