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首页> 外文期刊>Bulletin of materials science >Study of optical properties of TiO$_2$ nanoparticles and CdS@TiO$_2$ nanocomposites and their use for photocatalytic degradation of rhodamine B under natural light irradiation
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Study of optical properties of TiO$_2$ nanoparticles and CdS@TiO$_2$ nanocomposites and their use for photocatalytic degradation of rhodamine B under natural light irradiation

机译：TiO $ _2 $纳米粒子和CDS @ TiO $ _2 $纳米复合材料的光学性质研究及其用于自然光照射下罗丹明B的光催化降解的用途

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摘要

In this study, we report the synthesis of two CdS@TiO$_2$ nanocomposites (CT1 and CT2) by two-step low temperature solvothermal decomposition method using two different stoichiometric combinations between CdS and TiO$_2$ nanoparticles (NPs). CdCl$_2$(3-chlorobenzaldehyde thiosemicarbazone)$_2$ was used as a molecular precursor to obtain CdSNPs, whereas titanium isopropoxide was used to obtain TiO$_2$ NPs. The as-prepared CT nanocomposites were characterizedby powder X-ray diffraction, field emission scanning electron microscopy, Raman spectroscopy, transmission electron microscopy and X-ray photoelectron spectroscopy to evaluate their structures and properties. Further, these nanocomposites were used for the photocatalytic degradation of rhodamine B under solar light irradiation. It is found thatCdS@TiO$_2$ (CT1) nanocomposite shows highest degradation efficiency of 98.74% within 60 min as compared to bare TiO$_2$ NPs which shows only 66.40% degradation efficiency. The enhanced photocatalytic efficiency due to charge transfer properties of bare NPs and CT nanocomposites was further investigated by electrochemical analysis and photoluminescencestudies.
机译：在这项研究中，我们通过CDS和TiO $ _2 $纳米粒子（NPS）之间的两种不同化学计量组合，通过两步低温溶剂热分解方法报告两种CDS @ TiO $ _2 $纳米复合材料（CT1和CT2）的合成。 CDCl $ _2 $（3-氯苯甲醛硫代硫脲）$ _2 $被用作分子前体获得CDSNPS，而使用钛等丙氧化钛以获得TIO $ _2 $ NPS。粉末X射线衍射，场发射扫描电子显微镜，拉曼光谱，透射电子显微镜和X射线光电子能谱，粉末X射线衍射，用于评估它们的结构和性质的制备的CT纳米复合材料。此外，这些纳米复合材料用于太阳光照射下罗丹明B的光催化降解。结果发现，与裸机_2 $ NPS相比，在60分钟内显示出最高的降解效率为98.74％的最高降解效率为66.40％的降解效率。通过电化学分析和光致作用进一步研究了引起的裸NPS和CT纳米复合材料的电荷转移性能引起的增强的光催化效率。

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