文章信息/Info

Title:

One-Step Hydrothermal Synthesis and Photoelectrochemical Properties of ZnO/Pt Photoanodes

文章編號:

1674-3962(2024)03-0238-06

作者:

王小磊; 邱志勇

大連理工大學材料科學與工程學院 三束材料改性教育部重點實驗室，遼寧 大連 116000

Author(s):

WANG Xiaolei;  QIU Zhiyong

Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,Ministry of Education, School of Materials Science and Engineering,Dalian University of Technology, Dalian 116000, China

關鍵詞:

一步水熱法; ZnO; Pt; 光電化學; 水分解

Keywords:

one-step hydrothermal method; zinc oxide; platinum; photoelectrochemical; water splitting

分類號:

O643.36

DOI:

10.7502/j.issn.1674-3962.202303003

文獻標志碼:

A

摘要:

展示了一種非傳統(tǒng)的水熱方法，由金屬薄膜與超純水的一步水熱法合成制備ZnO薄膜負載Pt納米粒子的光陽極催化劑。通過改變初始金屬薄膜的成分，可以調節(jié)光陽極中Pt納米粒子的負載量，并通過對光電化學催化水分解效率的測量，系統(tǒng)探討Pt負載量對光陽極催化劑光電化學性能的影響。由于該水熱法所生成的光陽極催化劑具有獨特微納結構，因此該ZnO/Pt復合光陽極即使在催化劑質量為微克級時仍表現出高的催化活性，并且隨著Pt納米粒子負載量的增加，其水分解性能得到提高。當Pt納米粒子的物質的量分數為5.6%時，ZnO/Pt復合光陽極光電流密度達到最大值，約為純ZnO光陽極光電流密度的1.3倍。不僅制備出一種高催化活性的復合光電催化劑，而且為氧化物半導體貴金屬復合催化劑的制備提供了一種簡單、綠色的新方法。

Abstract:

This study presents a non-traditional hydrothermal method for synthesizing a zinc oxide film-supported platinum nanoparticle photocatalyst in a one-step reaction between a metal film and ultrapure water. By changing the composition of the initial metal film, the loading amount of platinum nanoparticles in the photocatalyst was modulated, and the effect of the platinum loading amount on its photoelectrochemical performance was systematically discussed through the measurement of the catalytic efficiency for water splitting. The unique micro/nanostructure generated by this hydrothermal method enabled the ZnO/Pt composite photocatalyst in this study to exhibit high catalytic activity, even at microgram levels. Its water-splitting performance was enhanced with an increasing platinum nanoparticle loading amount. The photocurrent density reached a maximum of about 1.3 times the pure zinc oxide water splitting efficiency when the amount of substance fraction of platinum nanoparticles was 5.6%. This study prepared a high active composite photoelectrochemical catalyst and provided a simple and environmentally friendly method for preparing oxide semiconductor noble metal composite catalysts.