Pt nanoparticles/TiO2 for photocatalytic degradation of phenols in wastewater
Pt nanoparticles/TiO2 for photocatalytic degradation of phenols in wastewater
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DOI：
10.1080/09593330.2013.820796
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发表时间：
2014-01-17
影响因子：
2.8
通讯作者：
Kuhn, J. N.
中科院分区：
文献类型：
--
作者：
Barakat, M. A.;Al-Hutailah, R. I.;Kuhn, J. N.
制备了Pt纳米粒子/TiO（2）催化剂，并对苯酚和2-氯苯酚（2-CP）模拟废水进行了紫外光催化降解。通过将胶体Pt纳米颗粒固定到二氧化钛（金红石型TiO（2））上来合成催化剂。利用Brunauer-Emmett-Teller等温线、X射线衍射、透射电镜等分析技术对催化剂及其组分的比表面积、结构和粒度分布进行了研究。在450 W紫外光照射下，在1 L间歇式光反应器中研究了苯酚和2-CP溶液的光催化活性。定期取样，使用紫外可见分光光度计分析样品中苯酚和2-CP的残留浓度。考察了催化剂浓度、溶液pH值、苯酚初始浓度等光催化过程的控制参数。结果表明，Pt/TiO 2对苯酚和2-CP污染物的光催化降解效果优于金红石型TiO 2。在优化条件下（催化剂用量为0.5g/L，污染物浓度为50 mg/L，光照时间为180 min），苯酚和2-氯苯酚的降解率分别达到87.7%和100%。
Pt nanoparticles/TiO (2) catalysts were prepared and evaluated for UV-photocatalytic degradation of phenol and 2-chlorophenol (2-CP) in synthetic wastewater solutions. The catalysts were synthesized by immobilizing colloidal Pt nanoparticles onto titanium dioxide (rutile TiO (2)). Analytical techniques, such as standard Brunauer-Emmett-Teller isotherms, X-ray diffraction, transmission electron microscope, were utillized for investigating the specific surface area, structure, and particle size distribution of the catalysts and its components. The photocatalytic activities of both phenol and 2-CP solutions were studied in a 1L batch photoreactor independently, under 450W UV irradiation. Samples were drawn at regular intervals and residual concentration of phenol and 2-CP in the samples was analysed using an UV-visible spectrophotometer. Parameters controlling the photocatalytic process, including catalyst concentration, solution pH, and initial phenol (2-CP) concentration, were investigated. The obtained results revealed that Pt/TiO2 showed higher photocatalytic degradation for both phenol and 2-CP pollutants in solution (as compared to the rutile TiO2). The degradation efficiencies of 87.7% and 100% were obtained for phenol and 2-CP, respectively, under optimized conditions (0.5g/L catalyst with a pollutant concentration of 50mg/L after irradiation time of 180min).