Photocatalytic Activity of ZnO/Ag Nanoparticles Fabricated by a Spray Pyrolysis Method with Different O2:N2 Carrier Gas Ratios and Ag Contents
Photocatalytic Activity of ZnO/Ag Nanoparticles Fabricated by a Spray Pyrolysis Method with Different O2:N2 Carrier Gas Ratios and Ag Contents
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DOI：
10.3390/catal12111374
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发表时间：
2022-11-01
期刊：
影响因子：
3.9
通讯作者：
Kusdianto, Kusdianto
中科院分区：
文献类型：
--
作者：
Hudandini, Meditha;Puri, Nurdiana Ratna;Kusdianto, Kusdianto
纺织工业的废水，例如，在印度尼西亚Gresik产生的废物可能对环境构成威胁，应在处置前进行处理。光降解是一个更有前途的方法来克服这个问题比传统的方法，如生物降解。ZnO因其独特的物理化学性质和稳定性而被广泛用于光降解。本研究将Ag负载到ZnO上，ZnO无毒、价廉，可以改善电子空穴分离，具有显著的催化潜力。采用超声喷雾热分解法制备了不同Ag含量（1、5和10 wt%）的ZnO和ZnO-Ag纳米粒子。还改变载气比（0 -2：N-2）（1：0、1：2、1：1、2：1和0：1）以检查其对纳米颗粒特性的影响。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和Brunauer、Emmett和Teller（BET）比表面积检查纳米颗粒特性。结果进行了解释，在紫外光照射下的光降解。在载气比为0：1时，ZnO-Ag催化剂的活性比未反应的ZnO催化剂的活性有所提高，反应速率常数分别为0.0059和0.0025 min（-1）。
Wastewaters of the textile industry, e.g., those generated in Gresik, Indonesia, are a possible threat to the environment and should be treated before disposal. Photodegradation is a more promising method to overcome this problem than conventional methods such as biodegradation. ZnO is widely used for photodegradation due to its unique physical and chemical properties and stability. In this study, Ag was loaded onto ZnO, which is non-toxic and inexpensive, can improve the electron-hole separation, and has a significant catalytic potential. Pristine ZnO and ZnO-Ag nanoparticles were fabricated by an ultrasonic spray pyrolysis system at different Ag contents (1, 5, and 10 wt%). The carrier gas ratio (O-2:N-2) was also changed (1:0, 1:2, 1:1, 2:1, and 0:1) to examine its effects on the nanoparticle characteristics. The nanoparticle characteristics were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer, Emmett, and Teller (BET) specific surface area. The results were interpreted in relation to photodegradation under UV light irradiation. An increase in the ZnO-Ag activity compared with pristine ZnO was observed at a carrier gas ratio of 0:1 with reaction rate constants of 0.0059 and 0.0025 min(-1), respectively.