Dye-sensitized nanoparticles for heterogeneous photocatalysis: Cases studies with TiO2, ZnO, fullerene and graphene for water purification
Dye-sensitized nanoparticles for heterogeneous photocatalysis: Cases studies with TiO2, ZnO, fullerene and graphene for water purification
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DOI：
10.1016/j.dyepig.2018.06.002
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发表时间：
2018-12
影响因子：
4.5
通讯作者：
Z. Youssef;L. Colombeau;N. Yesmurzayeva;F. Baros;R. Vanderesse;T. Hamieh;J. Toufaily;C. Frochot
中科院分区：
文献类型：
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作者：
Z. Youssef;L. Colombeau;N. Yesmurzayeva;F. Baros;R. Vanderesse;T. Hamieh;J. Toufaily;C. Frochot
本文综述了染料敏化纳米颗粒在水净化相关的多相光催化中的应用。有机光敏剂(PSS)的染料敏化是提高光催化效率，特别是将活性扩展到可见光区域的一种相关的替代方法。讨论了几个参数对各种污染物光降解性能的影响。这些因素包括NPs的类型、PS的性质和含量、PS与NPs表面的连接方式(物理吸附、共价接枝)、PS环上配位的重金属原子的存在以及用于激活的光的类型(紫外线、可见光或太阳能)。这些过程主要是用二氧化钛与卟啉或酞菁偶联进行的。通过对PS/TiO2材料光降解性能的研究，提取了PS性质、键合方式、PS含量、金属重原子性质对PS/TiO2光降解性能影响的主要趋势。在替代光催化剂的研究中，由于氧化锌与二氧化钛有许多相似之处，人们对PS/氧化锌体系进行了评价。还讨论了近年来基于碳材料的复合光催化剂，如PS/富勒烯和PS/石墨烯。对于每个体系和在每个辐照光源下，还详细描述了光诱导电荷转移的机制和产生的自由基的性质。必要时，除了水处理外，还考虑了相同光催化剂的其他应用，以说明一些现象和机理，如电荷转移和自由基性质。
In this review, the use of dye-sensitized nanoparticles (NPs) for heterogeneous photocatalysis related to water purification is considered. The dye-sensitization by the mean of organic photosensitizers (PSs) appears as a relevant alternative method to enhance the photocatalytic efficiency and, particularly, to extend the activity towards visible light domain. The discussion covers the impact of several parameters on the photodegradation performances of various pollutants. Those factors include the type of NPs, the nature and the content of the PS, the linkage mode between the PS and the surface of the NPs (physisorption, covalent grafting), the presence of a heavy-metal atom coordinated to the ring of the PS, and the type of light used for the activation (UV, visible or solar). These processes have been conducted principally with TiO2coupled with porphyrin or phthalocyanine. The main trends in terms of the effect of the PS nature, the linkage mode, the PS content, the nature of metallic heavy atoms are extracted by studying the photodegradation performance of the PS/TiO2materials. In the research of alternative photocatalysts, PS/ZnO systems has been evaluated since ZnO shares many similarities with titania. Recent hybrid photocatalysts based on carbon materials such as PS/fullerene and PS/graphene are also discussed. For each system and under each irradiation source, the mechanism of the light-induced charge transfer and the nature of the radicals generated is also thoroughly described. When necessary, besides water treatment, other applications of the same photocatalysts are considered to illustrate some phenomena and mechanisms such as charge transfer and radicals nature.