Bi2WO6 Nanosheets Decorated with ZnO Nanorods in 3D Hierarchical Heterostructures: Surfactant-Free Synthesis for Enhanced Visible-Light-Driven Photocatalytic Degradation

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-21 DOI:10.1007/s10562-025-05044-2

Hui Sun, Jingqi Jia, Bingge Chen, Gaoyang Liang, Hui Yu, Hongxia Jing

{"title":"Bi2WO6 Nanosheets Decorated with ZnO Nanorods in 3D Hierarchical Heterostructures: Surfactant-Free Synthesis for Enhanced Visible-Light-Driven Photocatalytic Degradation","authors":"Hui Sun, Jingqi Jia, Bingge Chen, Gaoyang Liang, Hui Yu, Hongxia Jing","doi":"10.1007/s10562-025-05044-2","DOIUrl":null,"url":null,"abstract":"<div><p>Aiming to develop efficient photocatalysts with targeted charge transfer pathways, ZnO/Bi<sub>2</sub>WO<sub>6</sub> Z-scheme heterojunctions were synthesized via a one-step surfactant-free hydrothermal method. The optimized composite (ZnO:Bi<sub>2</sub>WO<sub>6</sub> = 0.3:1) exhibits a 3D hierarchical structure comprising ZnO rods anchoring on Bi<sub>2</sub>WO<sub>6</sub>, nanosheets, leading to a high surface area (48.2 m<sup>2</sup>/g) and abundant surface oxygen vacancies, This unique configuration drives a hole-dominated Z-scheme charge transfer mechanism, where photogenerated holes directly oxidize tetracycline (TC) without relying on secondary radical mediation, achieving 98.1% TC degradation within 90 min (rate constant k = 0.04278 min<sup>–1</sup>, 2.9 times the rate of pure Bi<sub>2</sub>WO<sub>6</sub>). The composite also degrades Rhodamine B (RhB) (97.3%) and Methylene blue (MB) (95.1%) effectively, demonstrating versatile pollutant removal capability, the enhanced charge separation was confirmed by a photocurrent density 10 times higher than that of pure Bi<sub>2</sub>WO<sub>6</sub>, and the efficiency remained at 89% after four cycles. And it has the advantage of scalable synthesis. This work provides new insights into designing direct Z-scheme systems for practical environmental remediation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 6","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05044-2","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Aiming to develop efficient photocatalysts with targeted charge transfer pathways, ZnO/Bi₂WO₆ Z-scheme heterojunctions were synthesized via a one-step surfactant-free hydrothermal method. The optimized composite (ZnO:Bi₂WO₆ = 0.3:1) exhibits a 3D hierarchical structure comprising ZnO rods anchoring on Bi₂WO₆, nanosheets, leading to a high surface area (48.2 m²/g) and abundant surface oxygen vacancies, This unique configuration drives a hole-dominated Z-scheme charge transfer mechanism, where photogenerated holes directly oxidize tetracycline (TC) without relying on secondary radical mediation, achieving 98.1% TC degradation within 90 min (rate constant k = 0.04278 min^–1, 2.9 times the rate of pure Bi₂WO₆). The composite also degrades Rhodamine B (RhB) (97.3%) and Methylene blue (MB) (95.1%) effectively, demonstrating versatile pollutant removal capability, the enhanced charge separation was confirmed by a photocurrent density 10 times higher than that of pure Bi₂WO₆, and the efficiency remained at 89% after four cycles. And it has the advantage of scalable synthesis. This work provides new insights into designing direct Z-scheme systems for practical environmental remediation.

Graphical Abstract

Abstract Image

查看原文本刊更多论文

三维分层异质结构中ZnO纳米棒修饰的Bi2WO6纳米片：无表面活性剂合成增强可见光驱动光催化降解

为了开发具有目标电荷转移途径的高效光催化剂，采用无表面活性剂的水热法一步合成了ZnO/Bi2WO6 z型异质结。优化后的复合材料（ZnO:Bi2WO6 = 0.3:1）呈现出由锚定在Bi2WO6纳米片上的ZnO棒组成的三维分层结构，具有高表面积（48.2 m2/g）和丰富的表面氧空位。这种独特的结构驱动了空穴主导的Z-scheme电荷转移机制，其中光生成的空穴直接氧化四环素（TC），而不依赖于二次自由基的介导，在90分钟内达到98.1%的TC降解（速率恒定k = 0.04278 min - 1）。是纯Bi2WO6的2.9倍)。该复合材料对罗丹明B (RhB)（97.3%）和亚甲基蓝（MB）（95.1%）也有较好的降解效果，具有多用途的污染物去除能力，光电流密度比纯Bi2WO6高10倍，增强了电荷分离，4次循环后效率仍保持在89%。它具有可扩展合成的优势。这项工作为设计用于实际环境修复的直接z方案系统提供了新的见解。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.