Mineralization and toxicity reduction of textile dye neutral red in aqueous phase using BiOCl photocatalysis.
Mineralization and toxicity reduction of textile dye neutral red in aqueous phase using BiOCl photocatalysis.
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DOI：
10.1016/j.jphotobiol.2012.07.006
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
B. Sarwan;B. Pare;A. D. Acharya;S. Jonnalagadda
中科院分区：
文献类型：
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作者：
B. Sarwan;B. Pare;A. D. Acharya;S. Jonnalagadda
采用水解法制备了BiOCl催化剂。通过XRD、SEM、TEM、UV-vis和BET比表面积等手段对产物进行了表征。所制备的材料平均孔径为6- 13 nm。样品的BET比表面积约为40 m2/g。研究了合成的BiOCl光催化降解纺织染料中性红（NR）的效果。OH自由基形成的分析通过荧光技术进行。采用高效液相色谱-光电二极管阵列-电喷雾电离-质谱（HPLC-ESI-DAD-MS）技术对降解中间体和最终产物进行检测。光降解染料溶液的化学需氧量（COD）和染料吸光度的下降表明NR完全矿化为CO2和无机离子。循环实验证实了催化剂的相对稳定性。最后，利用发光海洋细菌费氏弧菌（Vibrio fischeri）对光催化处理前后的样品进行急性毒性评价，发现光催化降解后毒性完全消除。
The BiOCl catalyst was prepared by hydrolysis method. The compound was extensively characterized by XRD, SEM, TEM, UV–vis measurements and BET surface area. The prepared material had average pore diameter about 6–13nm. The BET surface area of the sample is about 40m2/g. The photocatalytic degradation and toxicity reduction of textile dye neutral red (NR) was investigated in the presence of as prepared BiOCl. The analysis of OH radical formation was performed by fluorescence technique. The intermediates and the final products of degradation were detected by high-performance liquid chromatography–photodiode array-electrospray ionization-mass spectrometry (HPLC–ESI-DAD-MS) technology. Decrease in chemical oxygen demand (COD) and dye absorbance of the photodegraded dye solution revealed a complete mineralization of NR into CO2and inorganic ions. The recycling experiments confirmed the relative stability of the catalyst. Finally, the luminescent marine bacteria Vibrio fischeri was used to assess the acute toxicity of samples prior to and after the photocatalytic treatment and it was found that toxicity was fully eliminated following photocatalytic degradation.