Carbon-coated anatase for oxidation of methylene blue and NO
Carbon-coated anatase for oxidation of methylene blue and NO
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DOI：
10.1016/j.apcatb.2005.10.021
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发表时间：
2006-04
影响因子：
22.1
通讯作者：
Takafumi Matsunaga;M. Inagaki
中科院分区：
文献类型：
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作者：
Takafumi Matsunaga;M. Inagaki
以质量比为90/10的二氧化钛/聚乙烯醇(PVA)为原料，在500~1000℃、高纯氮气中反应1h，制备了碳包覆TiO2光催化剂。在600℃的低温下制备的碳包覆二氧化钛，碳含量为5.5质量%，适用于NO气体氧化，活性略高于原始锐钛矿粉。然而，对于水中亚甲基蓝的光分解，800℃加热的样品表现出最高的活性，甚至好于没有碳包覆的原始锐钛矿型样品。研究表明，锐钛矿相的结晶度是影响其应用于水或气态污染物的重要因素，甚至在碳包覆TiO2光催化剂中也是如此。
Carbon-coated TiO2photocatalysts were prepared from the powder mixtures of TiO2/PVA of 90/10 in mass at a temperature of 500–1000°C for 1h in high purity nitrogen gas flow. Carbon-coated TiO2prepared at low temperatures as 600°C, of which carbon content was 5.5mass%, was shown to be applicable for NO gas oxidation, a little higher activity than the original anatase powder. For the photodecomposition of methylene blue in water, however, the one heated at 800°C showed the highest activity among the samples used, even better than the original anatase without carbon coating. The crystalliinity of anatase phase was shown to be important factor for the application to whether contaminants in water or gaseous ones even in carbon-coated TiO2photocatalysts.