Synthesis of TiO2/ramie fiber composite and its photocatalytic effect on the degradation of a dye in wastewater
Synthesis of TiO2/ramie fiber composite and its photocatalytic effect on the degradation of a dye in wastewater
复制标题
TiO2/苎麻纤维复合材料的合成及其对废水中染料降解的光催化作用
DOI：
10.1007/s11144-013-0602-1
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发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
Jianliang Xiao
中科院分区：
文献类型：
--
作者：
Zhong-Wen Liu;Jian Lu;Zhengping Hao;Jianliang Xiao
采用水热法制备了TiO 2。将其与可生物降解苎麻纤维制备的羧甲基纤维素进行化学复合，得到TiO 2/苎麻纤维复合材料。采用X射线衍射仪、环境扫描电镜和傅里叶变换红外光谱对TiO 2/苎麻纤维复合材料进行了表征。结果表明，TiO 2与苎麻纤维发生了化学结合，可重复使用5次以上，且TiO 2无明显损失。以橙子（MO）阴离子染料和罗丹明B（RB）阳离子染料溶液为降解对象，研究了TiO 2和TiO 2/苎麻纤维复合材料的光催化性能。结果表明，TiO 2分散在苎麻纤维上后，其光催化活性得到了显著提高。当0.5 g的TiO 2/苎麻纤维复合材料被添加到染料溶液中3 h时，初始浓度（20 mg/L的MO和12 mg/L的RB）的降解率大于90%。MO的光催化降解符合零级反应。
TiO2was prepared by a hydrothermal method. It was chemically combined with carboxymethyl cellulose prepared from biodegradable ramie fiber to obtain the TiO2/ramie fiber composite. The TiO2/ramie fiber composites were characterized by an X-ray diffractometer, an environmental scanning electron microscope, and a Fourier-transform infrared spectra. The results indicate that TiO2is chemically combined with ramie fiber, and it can be reused more than five times without obvious TiO2loss. The photocatalytic performances of TiO2and TiO2/ramie fiber composite used to degrade both a methyl orange (MO) anionic dye and a rhodamine B (RB) cationic dye solution indicate that the photocatalytic activities of TiO2for the degradation of the above described solutions are greatly improved when the TiO2is dispersed on ramie fiber. When 0.5 g of the TiO2/ramie fiber composite is added to a dye solution for 3 h, the degradation rates for the initial concentrations (20 mg/L of MO and 12 mg/L of RB) are greater than 90 %. The photocatalytic degradation of MO can be described as a zeroth order reaction.
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