Scholarlink

Abstract <p>Interfacing two semiconductors for heterojuctions construction has been considered as an effective way to facilitate electron-hole separation, thus improving the photocatalytic activity. In this paper, PCN-224/g-C<sub>3</sub>N<sub>4</sub> heterojunction was constructed by PCN-224 and g-C<sub>3</sub>N<sub>4</sub> using a solvothermal method. Transmission electron microscopy (TEM) images reveal a well-matched, smooth interface between PCN-224 and g-C<sub>3</sub>N<sub>4</sub>, demonstrating the successful formation of a tight junction. Photoelectric performance tests confirm that the heterojunction significantly enhances the light absorption capability within the visible range and improves the efficiency of electron-hole separation. Herein, the PCN-224/g-C<sub>3</sub>N<sub>4</sub> heterojunction exhibited excellent photocatalytic activity in both disinfection and organic pollutant degradation. Under visible light irradiation (λ &gt; 420 nm) for 3 h, it completely degraded phenol and effectively inactivated <i>E. coli</i>. In the photocatalytic process, electrons migrate from the conduction band of g-C<sub>3</sub>N<sub>4</sub> to PCN-224, while holes transfer from the valence band of PCN-224 to the valence band of g-C<sub>3</sub>N<sub>4</sub>, thereby generating <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10975_2025_8564_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="31" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{O}}_{2}^{{\bullet - }}\)</EquationSource> <!--KinCat2460210Jiang-m1--> </InlineEquation> and <i>h</i><sup>+</sup> radicals. These generated radicals effectively oxidize and degrade phenol.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structuring Tight Heterojunction between PCN-224 and g-C3N4 for Enhanced Photocatalytic Water Purification

  • 期刊论文

  • 发表日期：

    2025年6月1日

查看全文
  • Xin Jiang,
  • Zhenxing Zeng

摘要

Abstract

Interfacing two semiconductors for heterojuctions construction has been considered as an effective way to facilitate electron-hole separation, thus improving the photocatalytic activity. In this paper, PCN-224/g-C3N4 heterojunction was constructed by PCN-224 and g-C3N4 using a solvothermal method. Transmission electron microscopy (TEM) images reveal a well-matched, smooth interface between PCN-224 and g-C3N4, demonstrating the successful formation of a tight junction. Photoelectric performance tests confirm that the heterojunction significantly enhances the light absorption capability within the visible range and improves the efficiency of electron-hole separation. Herein, the PCN-224/g-C3N4 heterojunction exhibited excellent photocatalytic activity in both disinfection and organic pollutant degradation. Under visible light irradiation (λ > 420 nm) for 3 h, it completely degraded phenol and effectively inactivated E. coli. In the photocatalytic process, electrons migrate from the conduction band of g-C3N4 to PCN-224, while holes transfer from the valence band of PCN-224 to the valence band of g-C3N4, thereby generating \({\text{O}}_{2}^{{\bullet - }}\) and h+ radicals. These generated radicals effectively oxidize and degrade phenol.