Carbon coating of anatase-type TiO2 and photoactivity
Carbon coating of anatase-type TiO2 and photoactivity
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DOI：
10.1039/b201942f
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发表时间：
2002-04
影响因子：
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通讯作者：
T. Tsumura;N. Kojitani;Ikuichiro Izumi;N. Iwashita;M. Toyoda;M. Inagaki
中科院分区：
文献类型：
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作者：
T. Tsumura;N. Kojitani;Ikuichiro Izumi;N. Iwashita;M. Toyoda;M. Inagaki
通过在高于700 °C的温度下在N2气流下加热聚乙烯醇和TiO2的粉末混合物，成功地进行了光催化锐钛矿型TiO2粉末的碳包覆。所有的二氧化钛颗粒都被碳层覆盖，看起来是黑色的。对于亚甲基蓝（MB）水溶液，碳包覆纳米管粉末在紫外光照射下表现出明显的吸附和分解作用，并被证实与未包覆碳的纳米管粉末几乎保持相同的光活性。碳涂层的锐钛矿型二氧化钛被发现给不同的优点，光活性性能，抑制在高温下从金红石到金红石的相变，MB的快速吸附到碳层，吸附的MB的二氧化钛和防止的相互作用的二氧化钛与粘合剂树脂的分解。实验证实了亚甲基蓝在水溶液中的吸附和分解的重复循环。
Carbon coating of photocatalytic anatase-type TiO2 powders was successfully carried out by heating a powder mixture of poly(vinyl alcohol) and TiO2 under N2 gas flow at temperatures above 700 °C. All particles of TiO2 were covered by a carbon layer and looked black. For methylene blue (MB) in aqueous solution, carbon-coated anatase powders thus prepared showed marked adsorption and decomposition under UV irradiation and were confirmed to keep almost the same photoactivity as that without any carbon coating. Carbon coating of anatase-type TiO2 was found to give different merits for photoactive performance; suppression of phase transformation from anatase to rutile at high temperatures, quick adsorption of MB into the carbon layer, decomposition of adsorbed MB by TiO2 and prevention of the interaction of TiO2 with binder resin. Repeated cycles of adsorption and decomposition of methylene blue in aqueous solution were experimentally confirmed.