Au nanoparticles modified three-dimensional ZnO sheet@ZnO nanorod hybrids for enhancing the photocatalytic H2 evolution ability

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-03-11 DOI:10.1016/j.vacuum.2025.114247

Xiaohai Deng , Chuansheng Chen , Yi Huang , Bin Zeng

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Abstract

In order to overcome the high recombination rate of the photo-excitated carriers and narrow spectrum response range, the three-dimensional ZnO sheet@ZnO nanorod hybrids (3D ZS@ZR) were synthesized in situ via co-precipitation method, and then the surface of ZnO sheets or nanorods was decorated by using Au nanoparticles. Experimental results illustrate that the three-dimensional ZnO sheet/nanorod hybrids were synthetized, which is composed of ZnO sheet and ZnO nanorod decorated by Au nanoparticles. Moreover, the fine Au nanoparticle significantly enhances the photocatalytic H₂ evolution ability of 3D ZS@ZR. When Au content is 1.5 w%, the resultant 3D AuZS@AuZR (1.5 Au) possesses the best photocatalytic activity, and its average H₂ production velocity is 0.7859 mmol g⁻¹ h⁻¹, which is approximately 18.7 times higher compared to the 3D ZS@ZR. The enhancement for H₂ evolution efficiency is that the Au modification enlarges the spectrum responded range, reduces the impedance, and decreases the recombination rate of photo-excited electron-hole pairs.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.