Abstract In this work, a set of novel Cu2ZnSnS4/Bi2WO6 (CZTS/BWO) two-dimensional (2D)/two-dimensional (2D) type-II heterojunctions with different CZTS weight ratios (1%, 2%, and 5%) were successfully synthesized via a brief secondary solvothermal process. The successful formation of the heterojunctions was affirmed by characterization methods such as X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. The photocatalytic activity results showed that the prepared CZTS/BWO heterojunctions had excellent photocatalytic behaviors for organic degradation, especially when the mass fraction of CZTS with respect to BWO in the composite was 2%. Moreover, the addition of hydrogen peroxide (H2O2) could further improve the dye and antibiotic degradation efficiencies. The reinforced photocatalytic and photo-Fenton degradation performance were primarily attributable to the introduction of BWO, which afforded increased active sites, expanded the solar spectral response range, and accelerated the cycle of Cu(II)/Cu(I); after four cycling times, its catalytic activity did not decrease significantly. In addition, reasonable hypotheses of the photocatalytic and photo-Fenton catalytic mechanisms were formulated. This study is expected to provide a visual approach for designing a novel photo-Fenton catalyst to jointly utilize the photocatalytic and Fenton activities, which can be better applied to the purification of residual organics in wastewater.

中文翻译：

---

2D/2D II型Cu2ZnSnS4/Bi2WO6异质结促进可见光驱动的光芬顿催化活性

摘要 在这项工作中，一组具有不同 CZTS 重量比（1%、2% 和 5%）的新型 Cu2ZnSnS4/Bi2WO6（CZTS/BWO）二维（2D）/二维（2D）II 型异质结通过简短的二次溶剂热过程成功合成。X射线光电子能谱和高分辨率透射电子显微镜等表征方法证实了异质结的成功形成。光催化活性结果表明，制备的 CZTS/BWO 异质结对有机物降解具有优异的光催化性能，尤其是当复合材料中 CZTS 相对于 BWO 的质量分数为 2% 时。此外，过氧化氢（H2O2）的加入可以进一步提高染料和抗生素的降解效率。增强的光催化和光芬顿降解性能主要归因于 BWO 的引入，增加了活性位点，扩大了太阳光谱响应范围，加速了 Cu(II)/Cu(I) 的循环；四次循环后，其催化活性没有明显下降。此外，提出了光催化和光芬顿催化机理的合理假设。该研究有望为设计一种新型光芬顿催化剂提供一种视觉方法，以共同利用光催化和芬顿活性，更好地应用于废水中残留有机物的净化。加速Cu(II)/Cu(I)的循环；四次循环后，其催化活性没有明显下降。此外，提出了光催化和光芬顿催化机理的合理假设。该研究有望为设计一种新型光芬顿催化剂提供一种视觉方法，以共同利用光催化和芬顿活性，更好地应用于废水中残留有机物的净化。加速Cu(II)/Cu(I)的循环；四次循环后，其催化活性没有明显下降。此外，提出了光催化和光芬顿催化机理的合理假设。该研究有望为设计一种新型光芬顿催化剂提供一种视觉方法，以共同利用光催化和芬顿活性，更好地应用于废水中残留有机物的净化。