Surface Epitaxial Growth of 2D/2D Bi2O2S/CdS Heterojunction Photoanodes and Their Photoelectrochemical Properties

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2024-10-21 DOI:10.1021/acs.langmuir.4c03156

Xueling Wei, Zhen Ma, Yuanhao Yang, Qiujie Li, Qian Sun, Dekai Zhang, Enzhou Liu, Hui Miao

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Abstract

Constructing high catalytic activity heterojunctions to compensate for the shortcomings of single catalysts has promoted the development of semiconductor catalysts in photoelectrochemical (PEC) water splitting. In this case, the 2D/2D Bi₂O₂S/CdS composite was successfully constructed by an in situ surface epitaxial growth method. At 1.23 V vs RHE, the catalytic activity of Bi₂O₂S/CdS with a 2D/2D heterojunction is the highest, and the current density of the Bi₂O₂S/CdS photoanode is 3.46 mA/cm². Compared with the Bi₂O₂S photoanode (0.59 mA/cm²), the performance has been improved by 5.86 times. In electrochemical impedance spectroscopy testing, the arc radius of 2D/2D Bi₂O₂S/CdS is smaller than that of Bi₂O₂S, indicating faster charge-transfer kinetics. The data show that the 2D/2D heterojunction with surface–surface contact successfully enhances the catalytic activity of Bi₂O₂S, greatly elevating the efficiency of charge separation and migration. This study provides a method to enhance the PEC activity in type-I heterojunction photoelectrodes, promoting the application of Bi₂O₂S-based materials in photoelectrochemistry.

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二维/二维 Bi2O2S/CdS 异质结光阳极的表面外延生长及其光电化学特性

构建高催化活性异质结以弥补单一催化剂的不足，促进了光电化学（PEC）水分离半导体催化剂的发展。在本实验中，采用原位表面外延生长法成功构建了 2D/2D Bi2O2S/CdS 复合材料。在 1.23 V vs RHE 条件下，具有 2D/2D 异质结的 Bi2O2S/CdS 的催化活性最高，Bi2O2S/CdS 光阳极的电流密度为 3.46 mA/cm2。与 Bi2O2S 光阳极（0.59 mA/cm2）相比，性能提高了 5.86 倍。在电化学阻抗谱测试中，2D/2D Bi2O2S/CdS 的电弧半径小于 Bi2O2S，表明电荷转移动力学更快。数据表明，具有表面-表面接触的 2D/2D 异质结成功地增强了 Bi2O2S 的催化活性，大大提高了电荷分离和迁移的效率。该研究为提高 I 型异质结光电极的 PEC 活性提供了一种方法，促进了 Bi2O2S 基材料在光电化学中的应用。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).