UV-irradiated photocatalytic degradation of nitrobenzene by titania binding on quartz tube
UV-irradiated photocatalytic degradation of nitrobenzene by titania binding on quartz tube
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DOI：
10.1155/2012/681941
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发表时间：
2012-10
影响因子：
3.2
通讯作者：
T. Whang;M. Hsieh;T. Shi;C. Kuei
中科院分区：
文献类型：
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作者：
T. Whang;M. Hsieh;T. Shi;C. Kuei
提出了一种紫外光催化降解硝基苯的新方法，通过在石英管上引入正硅酸乙酯，将纳米二氧化钛粒子包覆在石英管上。讨论了pH值、温度、浓度和进气量对硝基苯光降解的影响，并通过在不同的实验条件下进行反应，获得了反应的活化能、熵、热焓、吸附常数和速率常数等物理性质。在实验条件下，硝基苯残留物的光降解效率最高，为8.8%。通过高效液相色谱、GC/MS、离子色谱(IC)和化学需氧量(COD)分析，研究了光降解途径。
A new method for UV-irradiated degradation of nitrobenzene by titania photocatalysts was proposed, titania nanoparticles were coated on a quartz tube through the introduction of tetraethyl orthosilicate into the matrix. The dependence of nitrobenzene photodegradation on pH, temperature, concentration, and air feeding was discussed, and the physical properties such as the activation energy, entropy, enthalpy, adsorption constant, and rate constant were acquired by conducting the reactions in a variety of experimental conditions. The optimum efficiency of the photodegradation with the nitrobenzene residue as low as 8.8% was achieved according to the experimental conditions indicated. The photodegradation pathways were also investigated through HPLC, GC/MS, ion chromatography (IC), and chemical oxygen demand (COD) analyses.