Bhatti Muhammad Ali, Shah Aqeel Ahmed, Almaani Khalida Faryal, Tahira Aneela, Chandio Ali Dad, Willander Magnus, Nur Omer, Mugheri Abdul Qayoom, Bhatti Adeel Liaquat, Waryani Baradi, Nafady Ayman, Ibupoto Zafar Hussain
Department of Environmental Sciences University of Sindh Jamshoro, 76080, Sindh Pakistan.
Nadirshaw Eduljee Dinshaw (NED) University of Engineering and Technology Karachi, 75270, Pakistan.
J Nanosci Nanotechnol. 2021 Apr 1;21(4):2511-2519. doi: 10.1166/jnn.2021.19107.
In this research work, we have produced a composite material consisting titanium dioxide (TiO₂) and zinc oxide (ZnO) nanostructures via precipitation method. Scanning electron microscopy (SEM) study has shown the mixture of nanostructures consisting nanorods and nano flower. Energy dispersive spectroscopy (EDS) study has confirmed the presence of Ti, Zn and O as main elements in the composite. X-ray diffraction (XRD) study has revealed that the successful presence of TiO₂ and ZnO in the composite. The composite material exhibits small optical energy band gap which led to reduction of the charge recombination rate of electron-hole pairs. The band gap for the composite TiO₂/ZnO samples namely 1, 2, 3 and 4 is 3.18, 3.00, 2.97 and 2.83 eV respectively. Small optical bandgap gives less relaxation time for the recombination of electron and hole pairs, thus favorable photodegradation is found. The degradation efficiency for the TiO₂/ZnO samples for methylene blue in order of 55.03%, 75.7%, 85.14% and 90.08% is found for the samples 1, 2, 3 and 4 respectively. The proposed study of titanium dioxide addition into ZnO is facile and inexpensive for the development of efficient photocatalysts. This can be capitalized at large scale for the energy and.
在这项研究工作中，我们通过沉淀法制备了一种由二氧化钛（TiO₂）和氧化锌（ZnO）纳米结构组成的复合材料。扫描电子显微镜（SEM）研究表明，该纳米结构混合物由纳米棒和纳米花组成。能量色散光谱（EDS）研究证实了复合材料中Ti、Zn和O作为主要元素的存在。X射线衍射（XRD）研究表明复合材料中成功存在TiO₂和ZnO。该复合材料表现出较小的光学能带隙，这导致电子-空穴对的电荷复合率降低。TiO₂/ZnO样品1、2、3和4的带隙分别为3.18、3.00、2.97和2.83 eV。较小的光学带隙为电子和空穴对的复合提供了更短的弛豫时间，因此发现了良好的光降解效果。样品1、2、3和4对亚甲基蓝的TiO₂/ZnO样品降解效率分别为55.03%、75.7%、85.14%和90.08%。所提出的将二氧化钛添加到氧化锌中的研究对于开发高效光催化剂来说简便且成本低廉。这可以大规模地用于能源领域。
