具有高光催化活性的新型 Z 型 Bi2WO6/Bi2MoO6 p-n 结光催化剂的简便合成：结构、动力学和机理方法,Materials Research Bulletin

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具有高光催化活性的新型 Z 型 Bi2WO6/Bi2MoO6 p-n 结光催化剂的简便合成：结构、动力学和机理方法
Materials Research Bulletin ( IF 5.3 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.materresbull.2020.110979
Hadi Salari

摘要设计并合成了3D花状金属氧化物纳米复合材料Bi2WO6/Bi2MoO6。通过XPS、XRD、SEM、IR、TEM、BET、PL、PC、EDX和DRS分析了光催化剂的物理、电化学和光学性质以及相结构和形貌。Bi2MoO6 提高了 Bi2WO6 的光催化活性，光学带隙的研究表明 Bi2WO6/Bi2MoO6 是一种可见光活化的光催化剂。制备的 Bi2WO6/Bi2MoO6 在可见光照射下表现出较高的光催化性能和良好的重复使用能力。酸性蓝 92 用作偶氮染料用于研究光催化活性，观察到在可见光照射 20 分钟后，染料完全降解。不同的参数，如染料浓度、Bi2MoO6 与 Bi2WO6 的重量百分比、优化了 pH 值和催化剂用量。Bi2WO6/Bi2MoO6纳米结构的强氧化能力、有效的电荷分离和电子-空穴转移是高光催化活性的主要原因。研究了Bi2WO6/Bi2MoO6的光催化反应动力学和机理。还提出了光反应机理模式。

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Facile synthesis of new Z-scheme Bi2WO6/Bi2MoO6 p–n junction photocatalysts with high photocatalytic activity: structure, kinetics and mechanism approach

Abstract 3D flower like metal oxide nanocomposites, Bi2WO6/Bi2MoO6, were designed and synthesized. The physical, electrochemical and optical properties as well as phase structure and morphology of photocatalysts were analyzed by XPS, XRD, SEM, IR, TEM, BET, PL, PC, EDX and DRS. Bi2MoO6 elevated the Bi2WO6 photocatalytic activity and investigation of optical band gap showed that Bi2WO6/Bi2MoO6 is a visible light activated photocatalyst. The fabricated Bi2WO6/Bi2MoO6 exhibited high photocatalytic performance and excellent reusability capability under visible light irradiation. Acid blue 92 was used as an azo dye for investigation of photocatalytic activity and it was observed that after 20 min of visible light irradiation, the dye was degraded completely. Different parameters such as dye concentration, weight percent ratio of Bi2MoO6 to Bi2WO6, pH and catalyst dosage were optimized. Strong oxidative ability, efficient charge separation and transfer the electron-hole through the Bi2WO6/Bi2MoO6 nanostructure are main reasons for high photocatalytic activity. The photocatalytic reaction kinetics and mechanism with the Bi2WO6/Bi2MoO6 were studied. The photoreaction mechanism mode was also proposed.

更新日期：2020-11-01

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