Wei Gan, Yan Guo, Dan Zhu, Min Ling, Can Jiang, Shengfu Zhang
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The prepared R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 contained a mass fraction of 42% rutile phase and 58% anatase phase, with the interface between the two phases exhibited a tightly bonded structure. Meanwhile, the heterojunction between the heterophase TiO<sub>2</sub> and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> interfaces improved the photo-quantum efficiency of R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, and the degradation efficiency of Rhodamine B (RhB) by R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 was 77.82% in 2 h under ultraviolet light illumination. Ultimately, the active species capture experiments verified that the primary active species in the photocatalytic reaction was h<sup>+</sup>, ·OH, and·O<sub>2</sub><sup>−</sup>. This work could shed light on the new approach to the rational design of high-efficiency heterophase TiO<sub>2</sub>-based photocatalysts.</p><h3>Graphical Abstract</h3><p>R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> photocatalysts with heterojunctions were controllably synthesized by an EDTA-2Na-assisted hydrothermal method.</p>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement the Photo-Quantum Efficiency in Photocatalytic Reactions via Well-Designed Rutile/Anatase TiO2 Growth on 2D Ti3C2Tx\",\"authors\":\"Wei Gan, Yan Guo, Dan Zhu, Min Ling, Can Jiang, Shengfu Zhang\",\"doi\":\"10.1007/s10562-025-04934-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>With the increasing problems caused by water pollution, the use of photocatalytic oxidation to remove pollutants from wastewater is a sustainable strategy. However, it is challenging to develop well-designed photocatalysts with high photo-quantum efficiency and the comprehension of their photocatalytic reaction mechanisms. Herein, a R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> (R: rutile; A: anatase) photocatalyst with different ratios of rutile and anatase phases was prepared by a facile hydrothermal method. The results showed that the number of rutile and anatase phases could be readily regulated by adjusting the dosage of titanium isopropoxide (TTIP) and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>. The prepared R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 contained a mass fraction of 42% rutile phase and 58% anatase phase, with the interface between the two phases exhibited a tightly bonded structure. Meanwhile, the heterojunction between the heterophase TiO<sub>2</sub> and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> interfaces improved the photo-quantum efficiency of R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, and the degradation efficiency of Rhodamine B (RhB) by R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 was 77.82% in 2 h under ultraviolet light illumination. Ultimately, the active species capture experiments verified that the primary active species in the photocatalytic reaction was h<sup>+</sup>, ·OH, and·O<sub>2</sub><sup>−</sup>. 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引用次数: 0
摘要
随着水污染问题的日益严重，利用光催化氧化技术去除废水中的污染物是一种可持续发展的策略。然而，开发设计良好、光量子效率高的光催化剂及其光催化反应机理是一个挑战。其中，R/ a - tio2 /Ti3C2Tx (R：金红石；采用水热法制备了金红石与锐钛矿不同配比的光催化剂。结果表明，通过调节异丙醇钛（TTIP）和Ti3C2Tx的用量，可以很容易地调节金红石相和锐钛矿相的数量。制备的R/ a - tio2 /Ti3C2Tx-0.2的金红石相质量分数为42%，锐钛矿相质量分数为58%，两相界面呈紧密结合结构。同时，异相TiO2与Ti3C2Tx界面的异质结提高了R/A-TiO2/Ti3C2Tx的光量子效率，在紫外光照射下，R/A-TiO2/Ti3C2Tx-0.2在2 h内对Rhodamine B （RhB）的降解效率为77.82%。最终，活性物质捕获实验验证了光催化反应中的主要活性物质是h+、·OH和·O2−。本研究为合理设计高效异相tio2基光催化剂提供了新思路。采用edta - 2na辅助水热法合成了具有异质结的r /A-TiO2/Ti3C2Tx光催化剂。
Enhancement the Photo-Quantum Efficiency in Photocatalytic Reactions via Well-Designed Rutile/Anatase TiO2 Growth on 2D Ti3C2Tx
With the increasing problems caused by water pollution, the use of photocatalytic oxidation to remove pollutants from wastewater is a sustainable strategy. However, it is challenging to develop well-designed photocatalysts with high photo-quantum efficiency and the comprehension of their photocatalytic reaction mechanisms. Herein, a R/A-TiO2/Ti3C2Tx (R: rutile; A: anatase) photocatalyst with different ratios of rutile and anatase phases was prepared by a facile hydrothermal method. The results showed that the number of rutile and anatase phases could be readily regulated by adjusting the dosage of titanium isopropoxide (TTIP) and Ti3C2Tx. The prepared R/A-TiO2/Ti3C2Tx-0.2 contained a mass fraction of 42% rutile phase and 58% anatase phase, with the interface between the two phases exhibited a tightly bonded structure. Meanwhile, the heterojunction between the heterophase TiO2 and Ti3C2Tx interfaces improved the photo-quantum efficiency of R/A-TiO2/Ti3C2Tx, and the degradation efficiency of Rhodamine B (RhB) by R/A-TiO2/Ti3C2Tx-0.2 was 77.82% in 2 h under ultraviolet light illumination. Ultimately, the active species capture experiments verified that the primary active species in the photocatalytic reaction was h+, ·OH, and·O2−. This work could shed light on the new approach to the rational design of high-efficiency heterophase TiO2-based photocatalysts.
Graphical Abstract
R/A-TiO2/Ti3C2Tx photocatalysts with heterojunctions were controllably synthesized by an EDTA-2Na-assisted hydrothermal method.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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