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Z-scheme heterojunction based on NiWO4/WO3 microspheres with enhanced photocatalytic performance under visible light
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-09-03 , DOI: 10.1039/d1dt02558a Jianhua Ge 1 , Yangang Sun 1 , Weiwei Chen 1 , Fengge Song 1 , Yu Xie 1 , Yuanyuan Zheng 1 , Pinhua Rao 1
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-09-03 , DOI: 10.1039/d1dt02558a Jianhua Ge 1 , Yangang Sun 1 , Weiwei Chen 1 , Fengge Song 1 , Yu Xie 1 , Yuanyuan Zheng 1 , Pinhua Rao 1
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The green treatment of dye wastewater has always been a research hotspot in the environmental field. The photocatalytic technology is considered to be a simple and effective strategy to remove dyes in wastewater. A new type of NiWO4/WO3 Z-scheme heterojunction microspheres were synthesized by a simple hydrothermal method and impregnation-calcination process. The crystal structure, microscopic morphology, optical and electrochemical properties of the samples were systematically characterized. The photocatalytic activity of methylene blue (MB) was studied by visible light irradiation. The results show that the direct Z-scheme heterojunction formed by NiWO4/WO3 effectively reduces the transfer resistance of photogenerated carriers and improves the separation efficiency of photogenerated carriers. The degradation rates of NiWO4/WO3-4 Z-scheme heterojunction microspheres to MB dye are 1.8 and 3.2 times higher than that of pure WO3·2H2O and WO3 microspheres, respectively. Combined with the Mott–Schottky curve and the active species capture experiments, a possible Z-scheme photogenerated carrier transfer mechanism is proposed. This study provides a method for the development and design of Z-scheme heterojunction photocatalysts in the field of wastewater purification.
中文翻译：
基于NiWO4/WO3微球的Z型异质结在可见光下具有增强的光催化性能
染料废水的绿色化处理一直是环境领域的研究热点。光催化技术被认为是去除废水中染料的一种简单有效的策略。采用简单的水热法和浸渍-煅烧工艺合成了一种新型NiWO 4 /WO 3 Z型异质结微球。系统地表征了样品的晶体结构、微观形貌、光学和电化学性能。通过可见光照射研究了亚甲基蓝 (MB) 的光催化活性。结果表明，NiWO 4 /WO 3形成的直接Z型异质结有效降低了光生载流子的转移阻力，提高了光生载流子的分离效率。NiWO 4 /WO 3 -4 Z型异质结微球对MB染料的降解率分别是纯WO 3 ·2H 2 O和WO 3微球的1.8倍和3.2倍。结合Mott-Schottky曲线和活性物质捕获实验，提出了一种可能的Z-scheme光生载流子转移机制。该研究为污水净化领域Z型异质结光催化剂的开发和设计提供了一种方法。
更新日期：2021-09-14
中文翻译：
基于NiWO4/WO3微球的Z型异质结在可见光下具有增强的光催化性能
染料废水的绿色化处理一直是环境领域的研究热点。光催化技术被认为是去除废水中染料的一种简单有效的策略。采用简单的水热法和浸渍-煅烧工艺合成了一种新型NiWO 4 /WO 3 Z型异质结微球。系统地表征了样品的晶体结构、微观形貌、光学和电化学性能。通过可见光照射研究了亚甲基蓝 (MB) 的光催化活性。结果表明，NiWO 4 /WO 3形成的直接Z型异质结有效降低了光生载流子的转移阻力，提高了光生载流子的分离效率。NiWO 4 /WO 3 -4 Z型异质结微球对MB染料的降解率分别是纯WO 3 ·2H 2 O和WO 3微球的1.8倍和3.2倍。结合Mott-Schottky曲线和活性物质捕获实验，提出了一种可能的Z-scheme光生载流子转移机制。该研究为污水净化领域Z型异质结光催化剂的开发和设计提供了一种方法。
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