氧化锌(ZnO)量子点(QDs)包埋对二氧化钛(TiO2)纳米粒子物理化学性质和光催化活性的影响

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Journal of Physical Science Pub Date : 2021-08-25 DOI:10.21315/jps2021.32.2.6

A. Iqbal, U. Saidu, Farook Adam, S. Sreekantan, Normawati Jasni, M. Ahmad

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引用次数: 5

摘要

研究了氧化锌(ZnO)量子点(QDs)包埋对锐钛矿型二氧化钛(TiO2)理化性质的影响。采用溶胶-凝胶辅助水热法制备了高孔纳米复合材料ZQT。粉末x射线衍射(XRD)分析表明，ZnO量子点、锐钛矿型TiO2 (TiO2 NPs)和ZQT的平均晶粒尺寸分别为4.45 nm、9.22 nm和11.38 nm。光致发光(PL)分析发现ZQT中存在与TiO2、氧空位和ZnO量子点的量子约束效应(QCE)相关的缺陷。在48瓦的荧光照射下，相比于TiO2NPs(32.4%)和ZnO QDs (68.8%)， ZQT(98.0%)增强了四环素(TC)的光降解。光降解活性主要由O2●−驱动，其次是●OH和h+。

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The Effects of Zinc Oxide (ZnO) Quantum Dots (QDs) Embedment on the Physicochemical Properties and Photocatalytic Activity of Titanium Dioxide (TiO2) Nanoparticles

In this study, a detailed investigation on the effect of zinc oxide (ZnO) quantum dots (QDs) embedment on the physicochemical properties of anatase titanium dioxide (TiO2) was conducted. The highly porous nanocomposite labelled as ZQT was prepared via the sol-gel assisted hydrothermal method. The powder X-ray diffraction (XRD) analysis indicates that the average crystallite size of the ZnO QDs, anatase TiO2 (TiO2 NPs) and ZQT were 4.45 nm, 9.22 nm and 11.38 nm, respectively. Photoluminescent (PL) analysis detected the presence of defects related to TiO2, oxygen vacancies and quantum confinement effect (QCE) of the ZnO QDs in ZQT. These features enhanced the photodegradation of tetracycline (TC) under 48 watt of fluorescent light irradiation when ZQT (98.0%) was used compared to TiO2NPs (32.4%) and ZnO QDs (68.8%). The photodegradation activity was driven by O2●− followed by ●OH and h+.

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来源期刊

Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.