Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632 115, India.
Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632 115, India.
Environ Res. 2021 Sep;200:111365. doi: 10.1016/j.envres.2021.111365. Epub 2021 May 24.
In the present work, a visible light driven AgVO/BiOI nanocomposite photocatalyst with different wt % (1, 2, 3) of AgVO was fabricated by using facile hydrothermal method. Further, the nanocomposite was characterized by FT-IR, XRD, SEM, TEM, EDS, UV-vis DRS, photoluminescence and photoelectrochemical studies. The structural characterization showed nanorods on nanosheet surface. Among different AgVO loaded samples, the photocatalytic efficiency of 1 wt % AgVO/BiOI nanocomposite was found to be comparatively higher than the pure BiOI and AgVO. The photodegradation rate constant values of pure BiOI, AgVO and 1, 2, 3 wt % AgVO/BiOI nanocomposites are 0.006, 0.0033, 0.0255, 0.01575, 0.0116 min respectively. This enhanced photocatalytic activity was due to the increasing visible light absorption ability and efficient separation of the charge carriers. Thereby, the 1 wt % AgVO/BiOI nanocomposite photocatalyst exhibited increased photodegradation activity, photostability and recyclability characteristics. The radical trapping experiment confirmed the role of OH and h in the photocatalytic degradation of RhB. Based on this, the probable mechanism of degradation of RhB under visible light irradiation has also been proposed. Hence, we believe it could be a promising material that can be employed for the photodegradation of organic pollutants present in wastewater.
在本工作中，通过简便的水热法制备了具有不同 wt %（1、2、3）AgVO 的可见光驱动 AgVO/BiOI 纳米复合材料光催化剂。此外，通过 FT-IR、XRD、SEM、TEM、EDS、UV-vis DRS、光致发光和光电化学研究对纳米复合材料进行了表征。结构表征显示出纳米片表面上的纳米棒。在不同负载 AgVO 的样品中，发现 1 wt % AgVO/BiOI 纳米复合材料的光催化效率比纯 BiOI 和 AgVO 要高。纯 BiOI、AgVO 和 1、2、3 wt % AgVO/BiOI 纳米复合材料的光降解速率常数值分别为 0.006、0.0033、0.0255、0.01575、0.0116 min。这种增强的光催化活性归因于增加的可见光吸收能力和载流子的有效分离。因此，1 wt % AgVO/BiOI 纳米复合材料光催化剂表现出增强的光降解活性、光稳定性和可回收性特征。自由基捕获实验证实了 OH 和 h 在 RhB 光催化降解中的作用。基于此，还提出了在可见光照射下 RhB 降解的可能机制。因此，我们相信它可能是一种有前途的材料，可以用于光降解废水中存在的有机污染物。
