Photocatalytic performances of Ti-doped Li<sub>2</sub>MnO<sub>3</sub> catalysts for tetracycline degradation

JIANG Qingmei; ZHOU Ying; DAI Peng; PENG Qinlei; LI Yuanyuan

doi:10.12434/j.issn.2097-2547.20250166

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Photocatalytic performances of Ti-doped Li₂MnO₃ catalysts for tetracycline degradation

更新时间：2026-03-19

- Photocatalytic performances of Ti-doped Li₂MnO₃ catalysts for tetracycline degradation
- Vol. 51, Issue 3, Pages: 131-138(2026)
- 作者机构：
  
  1.重庆化工职业学院化学工程学院，重庆 400020
  2.重庆理工大学化学化工学院，重庆 400054
  3.石河子大学化学化工学院，新疆石河子 832003
  4.重庆第二师范学院生物与化学工程学院，重庆 400067
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250166
  CLC： TQ426.8;O64
- Received：09 April 2025，
  
  Revised：2025-05-12，
  
  Published：25 March 2026
- 稿件说明：
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蒋清梅,周颖,代朋等.Ti掺杂Li₂MnO₃催化剂光催化降解四环素的性能研究[J].低碳化学与化工,2026,51(3):131-138.

JIANG Qingmei,ZHOU Ying,DAI Peng,et al.Photocatalytic performances of Ti-doped Li₂MnO₃ catalysts for tetracycline degradation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):131-138.
蒋清梅,周颖,代朋等.Ti掺杂Li₂MnO₃催化剂光催化降解四环素的性能研究[J].低碳化学与化工,2026,51(3):131-138. DOI： 10.12434/j.issn.2097-2547.20250166.

JIANG Qingmei,ZHOU Ying,DAI Peng,et al.Photocatalytic performances of Ti-doped Li₂MnO₃ catalysts for tetracycline degradation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):131-138. DOI： 10.12434/j.issn.2097-2547.20250166.

摘要

针对四环素等抗生素残留引发的水体污染问题，采用高温固相法合成了不同Ti掺杂量的Li

（

= 0、0.1、0.2、0.3或0.4）催化剂，旨在通过调控Li

MnO

的能带结构提升其光催化性能。通过XRD和FT-IR等表征分析了催化剂的物化性质，发现所有催化剂均保持纯相结构。光催化实验结果表明，在500 W汞灯下照射30 min，Li

0.7

0.3

展现出最优的光催化性能，其四环素降解率达66.7%，表观动力学速率常数为0.08480 L/(mg∙min)，约为Li

MnO

的1.90倍。莫特-肖特基和阻抗测试表明，Ti掺杂使Li

MnO

导带电位负移，同时提升了载流子分离效率。自由基捕获实验证实空穴（h

）和超氧阴离子自由基（•O

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175163&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175162&type=

1.10066664

3.89466691

）是降解过程的主要活性物种。

Abstract

To address the water pollution caused by antibiotic residues such as tetracycline

a series of Ti-doped Li

(

= 0

0.1

0.2

0.3 or 0.4) catalysts via a high-temperature solid-state method were synthesized

aiming to enhance the photocatalytic performance of Li

MnO

through band structure modulation. Comprehensive characte

rizations such as XRD and FT-IR confirm that all synthesized samples maintain pure-phase structures without secondary phase formation. The results of photocatalytic experiments reveal that under irradiation by 500 W mercury lamp for 30 minutes

0.7

0.3

exhibits the optimal photocatalytic performance

achieving a tetracycline degradation rate of 66.7%

with an apparent rate constant of 0.08480 L/(mg·min)

which is approximately 1.90 times than that of Li

MnO

. Mott-Schottky and EIS tests demonstrate that Ti doping induces a negative shift in the conduction band potential while significantly improving charge carrier separation efficiency. Radical trapping experiments identify holes (h

) and superoxide anion radicals (•O

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175176&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175164&type=

1.10066664

3.64066648

) as the dominant active species in the degradation process.

关键词

Keywords

references

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Related Institution

Department of Biological and Chemical Engineering, Chongqing University of Education

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Key Laboratory of Low Carbon Technology of Hydrogen Metallurgy in Hebei Province

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Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University

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Photocatalytic performances of Ti-doped Li2MnO3 catalysts for tetracycline degradation

DOI：10.12434/j.issn.2097-2547.20250166

摘要

Abstract

关键词

Keywords

references

Photocatalytic performances of Ti-doped Li₂MnO₃ catalysts for tetracycline degradation