Study on construction of Ti3C2 MXene/Ag3VO4 heterojunction catalysts and their photocatalytic CO2 reduction performances

LI Run; WANG Maoying; SUN Longshuai; MENG Xinyue; WANG Chuanyi; ZHU Pengfei

doi:10.12434/j.issn.2097-2547.20250453

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Study on construction of Ti₃C₂ MXene/Ag₃VO₄ heterojunction catalysts and their photocatalytic CO₂ reduction performances

更新时间：2026-02-13

- Study on construction of Ti₃C₂ MXene/Ag₃VO₄ heterojunction catalysts and their photocatalytic CO₂ reduction performances
- Vol. 51, Issue 2, Pages: 20-30(2026)
- 作者机构：
  
  陕西科技大学环境科学与工程学院，陕西西安 710021
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250453
  CLC： TQ032;O643.36
- Received：27 November 2025，
  
  Revised：2025-12-15，
  
  Published：25 February 2026
- 稿件说明：
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李润,王茂颖,孙龙帅等.Ti₃C₂ Mxene/Ag₃VO₄异质结催化剂的构建及其光催化还原CO₂性能研究[J].低碳化学与化工,2026,51(2):20-30.

LI Run,WANG Maoying,SUN Longshuai,et al.Study on construction of Ti₃C₂ MXene/Ag₃VO₄ heterojunction catalysts and their photocatalytic CO₂ reduction performances[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):20-30.
李润,王茂颖,孙龙帅等.Ti₃C₂ Mxene/Ag₃VO₄异质结催化剂的构建及其光催化还原CO₂性能研究[J].低碳化学与化工,2026,51(2):20-30. DOI： 10.12434/j.issn.2097-2547.20250453.

LI Run,WANG Maoying,SUN Longshuai,et al.Study on construction of Ti₃C₂ MXene/Ag₃VO₄ heterojunction catalysts and their photocatalytic CO₂ reduction performances[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):20-30. DOI： 10.12434/j.issn.2097-2547.20250453.

摘要

传统光催化还原CO

反应体系需借助大量牺牲剂来实现还原过程，如何通过设计高效、稳定的催化剂实现无需牺牲剂的光催化反应一直是该领域的研究热点。采用物理混合法制备了一系列Ti

/Ag

新型肖特基异质结光催化剂（TA

，

(Ag

(Ti

)），通过XRD、SEM和TEM等表征了其结构性质，并系统研究了其光催化还原CO

性能及机理。结果表明，Ag

纳米颗粒均匀分布在Ti

纳米片表面，形成紧密的界面结构。在无需添加任何牺牲剂的条件下，TA1.5催化性能最优

，在可见光（

≥ 420 nm）照射3 h后，其CO和CH

产量分别达到80.67 μmol/g和33.67 μmol/g，其中，CO产量分别是Ti

和Ag

的18.5倍和17.2倍。Ti

与Ag

之间形成的肖特基势垒有效驱动了光生电子从Ag

向Ti

的定向迁移，抑制了光生载流子复合，从而大幅提升了催化剂的光催化还原CO

性能。

Abstract

Traditional photocatalytic CO

reduction systems typically require a large amount of substantial sacrificial agents to facilitate the reduction process. How to design efficient and stable catalysts to achieve a photocatalytic reaction without sacrificial agents has always been a research hotspot in this field. A series of novel Schottky heterojunction photocatalysts Ti

/Ag

(TA

(Ag

(Ti

)) were prepared by physical mixing method. Their structural properties were characterized by XRD

SEM and TEM

etc.

and their photocatalytic CO

reduction performance and mechanism were systematically studied. The results show that Ag

nanoparticles are uniformly dispersed onto the surface of Ti

nanosheets

forming an intimate interfacial structure. Under sacrificial-agent-free conditions and visible light irradiation (

≥ 420 nm) for 3 h

TA1.5 exhibits the best photocatalytic CO

reduction performance. The yields of CO and CH

reach 80.67 μmol/g and 33.67 μmol/g

respectively. The yield of CO of TA1.5 is approximately 18.5 times and 17.2 times higher than that of Ti

and Ag

respectively. The Schottky barrier formed between Ti

and Ag

effectively promotes the directional migration of photogenerated electrons from Ag

to Ti

thereby suppressing charge carrier recombination and significantly enhancing the photocatalytic CO

reduction performance.

关键词

Keywords

references

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