Increasing the photocatalytic efficiency of ZnWO4 by synthesizing a Bi2WO6/ZnWO4 composite photocatalyst

Zinc tungstate: a review on its application as heterogeneous photocatalyst

“…Similarly, Ojha and Kim [76], Carvalho et al [77], He et al [78], and Kumar et al [79] reported that preparing heterojunctions at different molar ratios promotes an enhanced photocatalytic efficiency compared to ZnWO 4 , ZnO and Bi 2 WO 6 pristine materials. Therefore, the formation of different heterojunctions can substantially enhance the photocatalytic properties of these semiconductors.…”

“…The photocatalytic efficiency of the heterojunctions, especially the 0.1Bi 2 WO 6 / ZnWO 4 , was attributed to the lower recombination rate of the electron-hole pairs, induced by the band structure alignment, as photoinduced charges have a longer time to participate in the photocatalytic reaction before recombination. On the other hand, Kumar et al [79] synthesized the Bi 2 WO 6 / ZnWO 4 heterostructures by the modified hydrothermal method using different molar ratios of Bi 2 WO 6 in relation to ZnWO 4 (0.1, 0.2 and 0.3) for degradation of plasmocorinth B dye solution in a concentration of 12 mg.L -1 and the catalyst concentration of 500 mg.L -1 under UV irradiation. The transfer and separation mechanisms of the photogenerated charge carriers are analogous to the one already mentioned.…”

Adducing Knowledge Capabilities of Instrumental Techniques Through the Exploration of Heterostructures’ Modification Methods

“…Extensions to future research which enhance the efficacy of semiconductor materials at greater turnover numbers in the presence of natural visible light can be envisaged. The literature is abundant with upcoming research topics; Bi 2 WO 6 ZnWO 4 with Bi 3+ ion introduction, reducing the band gap from 4.7 to 3.5 eV for photodegrading plasmocorinth B, a designed‐alternative‐stacking approach of CdS loaded on hollow carbon, followed by ZnIn 2 S 4 (C/CdS@ZnIn 2 S 4 ) for photochemical control of CO 2 ‐to‐CO conversion and developing Schottky junction heterojunction photocatalysts using hydrothermal processes (ZnIn 2 S 4 /WC) for hydrogen production (up to 2400.3 μ mol h −1 g cat −1 ) [78–80] . The continual exploring of heterojunctions, Schottky Barriers and novel photocatalytic techniques will surely extend the knowledge basis tremendously.…”

Amine-Functionalized Crystalline Carbon Nanodots Decorated on Bi2WO6 Nanoplates as Solar Photocatalysts for Efficient Degradation of Tetracycline and Ciprofloxacin

“…Among these, Bi 2 WO 6 (bismuth tungstate) has emerged as a promising visible light-responsive photocatalyst with a narrow band gap and excellent chemical stability for degradation of a wide range of pollutants . Compared to pristine Bi 2 WO 6 , heterojunctions of Bi 2 WO 6 with any of the secondary photocatalysts, e.g., Bi 2 MoO 6 , SnS 2 , ZnWO 4 , and C 3 N 5 nanosheets, exhibited enhanced rates of photocatalytic degradation, owing to the formation of Z-scheme or S-scheme heterostructures. , In addition, the semiconductor-type photocatalyst comprising carbonaceous nanomaterials exhibited an enhanced rate of photocatalytic degradation. , The role of carbonaceous nanomaterials is attributed to various favorable phenomena, e.g., broad spectrum absorption of UV and visible light, separation of photoinduced electrons and holes, and electron transfer capabilities . Besides, carbon quantum dots act as photosensitizers for supplying electrons to the conduction bands of semiconductor photocatalysts .…”

“…Among these, Bi 2 WO 6 (bismuth tungstate) has emerged as a promising visible light-responsive photocatalyst with a narrow band gap and excellent chemical stability for degradation of a wide range of pollutants. 31 Compared to pristine Bi 2 WO 6 , heterojunctions of Bi 2 WO 6 with any of the secondary photocatalysts, e.g., Bi 2 MoO 6 , 32 SnS 2 , 33 ZnWO 4 , 34 and C 3 N 5 nanosheets, 35 exhibited enhanced rates of photocatalytic degradation, owing to the formation of Z-scheme or S-scheme heterostructures. 36,37 In addition, the semiconductor-type photocatalyst comprising carbonaceous nanomaterials exhibited an enhanced rate of photocatalytic degradation.…”