Effect of the Co-deposition of Pd and Pt on TiO_2 Photoactivity

Belfaa Khaled; Pulido Melian E.; Gonzalez Diaz O.; Dona Rodriguez J. M.; Ammar S.; Gadri A.

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Effect of the Co-deposition of Pd and Pt on TiO_2 Photoactivity

机译：Pd和Pt共沉积对TiO_2光活性的影响

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TiO2 was obtained by a simple sol-gel synthesis and subsequently modified by the addition of Pt and/or Pd particles on the surface by photodeposition. These photocatalysts were characterised by X-ray diffraction analysis, UV-Vis diffuse reflectance spectra, Brunauer-Emmett-Teller measurements, Fourier transform infrared spectroscopy, transmission electron microscopy, electron dispersive spectroscopy and X-ray photoelectron spectroscopy. Their photocatalytic activity was studied by following the degradation, mineralisation and detoxification of solutions of phenol, propanil and methylene blue. For comparison purposes, different commercial TiO2 catalysts were also tested: Kronos vlp7000, Millenium PC100, Aeroxide P90 and Aeroxide P25. This latter catalyst was also modified with Pt and/or Pd. The degradation kinetics of all the pollutants in aqueous solutions satisfactorily followed the pseudo-first order according to the Langmuir-Hinshelwood model in conditions of low concentration values. It was found that the simultaneous photodeposition of Pt and Pd contributed to enhancing photoactivity more than the individual deposition of either Pt or Pd.

机译：通过简单的溶胶-凝胶合成获得TiO2，然后通过光沉积在表面添加Pt和/或Pd颗粒进行改性。这些光催化剂的特征在于X射线衍射分析，UV-Vis漫反射光谱，Brunauer-Emmett-Teller测量，傅立叶变换红外光谱，透射电子显微镜，电子分散光谱和X射线光电子光谱。通过跟踪苯酚，丙烷和亚甲基蓝溶液的降解，矿化和解毒研究了它们的光催化活性。为了比较，还测试了不同的商用TiO2催化剂：Kronos vlp7000，Millennium PC100，Aeroxide P90和Aeroxide P25。后一种催化剂也用Pt和/或Pd改性。根据Langmuir-Hinshelwood模型，在低浓度条件下，水溶液中所有污染物的降解动力学均令人满意地遵循拟一级反应。发现与同时沉积Pt或Pd相比，同时沉积Pt和Pd有助于增强光活性。

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来源
《Arabian Journal for Science and Engineering. Section A, Sciences》 |2019年第1期|131-143|共13页
作者
Belfaa Khaled; Pulido Melian E.; Gonzalez Diaz O.; Dona Rodriguez J. M.; Ammar S.; Gadri A.;
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作者单位

Univ Gabes, Fac Sci Gabes, UREME, Gabes 6072, Tunisia;

Univ Las Palmas Gran Canaria, Grp Fotocatalisis & Espectroscopia Aplicac Medioa, Ctr Instrumental Quim Fis Desarrollo Invest Aplic, Unidad Asociada,CSIC,Dept Quim,Inst Ciencias Mat, Edificio Cent Parque Cient Tecnol, Las Palmas Gran Canaria 35017, Spain|Univ Las Palmas de Gran Canaria ULPGC, Inst Estudios Ambientales & Recursos Nat I UNAT, Las Palmas Gran Canaria 35017, Spain;

Univ Las Palmas Gran Canaria, Grp Fotocatalisis & Espectroscopia Aplicac Medioa, Ctr Instrumental Quim Fis Desarrollo Invest Aplic, Unidad Asociada,CSIC,Dept Quim,Inst Ciencias Mat, Edificio Cent Parque Cient Tecnol, Las Palmas Gran Canaria 35017, Spain|Univ Las Palmas de Gran Canaria ULPGC, Inst Estudios Ambientales & Recursos Nat I UNAT, Las Palmas Gran Canaria 35017, Spain;

Univ Las Palmas Gran Canaria, Grp Fotocatalisis & Espectroscopia Aplicac Medioa, Ctr Instrumental Quim Fis Desarrollo Invest Aplic, Unidad Asociada,CSIC,Dept Quim,Inst Ciencias Mat, Edificio Cent Parque Cient Tecnol, Las Palmas Gran Canaria 35017, Spain|Univ Las Palmas de Gran Canaria ULPGC, Inst Estudios Ambientales & Recursos Nat I UNAT, Las Palmas Gran Canaria 35017, Spain;

Univ Gabes, Fac Sci Gabes, UREME, Gabes 6072, Tunisia;

Univ Gabes, Fac Sci Gabes, UREME, Gabes 6072, Tunisia;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 eng
中图分类
关键词
TiO2; Pt; Pd; Co-deposition; Photocatalysis;

机译：TiO2;Pt;Pd;共沉积;光催化;

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Effect of the Co-deposition of Pd and Pt on TiO_2 Photoactivity

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