Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor
Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor
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DOI：
10.1021/ie101259p
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发表时间：
2011-02
影响因子：
4.2
通讯作者：
Jeevitha R. Raji;K. Palanivelu
中科院分区：
文献类型：
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作者：
Jeevitha R. Raji;K. Palanivelu
本研究尝试在低温下通过超声辅助溶胶-凝胶法制备纳米二氧化钛催化剂。合成的二氧化钛改性与从椰子油作为碳前驱体在两个不同的比例，然后进行热处理和微波处理。通过XRD、SEM、HR-SEM/EDX、UV-维斯吸收光谱和BET表面积分析完成了纯的和碳改性的二氧化钛催化剂的表征。发现碳改性的TiO 2催化剂的平均尺寸在90 nm的范围内。通过对阳离子染料亚甲基蓝和阴离子染料甲基橙子的降解来监测催化剂的太阳光催化活性。研究了pH值对染料降解的影响。研究表明，阳离子染料的降解是非常显着的碱性pH值，而阴离子染料的降解是有效的酸性pH值。
An attempt has been made in this study to prepare a nanosized titanium dioxide catalyst by an ultrasonication assisted sol−gel process at low temperature. The as-synthesized titania was modified with carbon from coconut oil as a carbon precursor in two different proportions and then subjected to thermal and microwave treatment. The characterization of the pure and carbon modified titania catalysts was accomplished by XRD, SEM, HR-SEM/EDX, UV−vis absorption spectroscopy, and BET surface area analysis. The average size of the carbon modified TiO2 catalysts was found to be in the range of 90 nm. The solar photocatalytic activity of the catalysts was monitored by the degradation of a cationic dye, methylene blue, and an anionic dye, methyl orange. The effect of pH on the degradation of the dyes was also investigated. The study revealed that the degradation of the cationic dye was highly pronounced in the alkaline pH, whereas, the degradation of the anionic dye was effective in acidic pH. A solar photochemical...