Solution-Based Fabrication of Ag/Anatase-/Rutile-TiO2 Composites for Visible-Light Photocatalytic Applications

IF 3.7 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2025-11-25 DOI:10.1007/s11244-025-02246-1

C.-T. Wu, T. N. N. Nguyen, M.-Y. Lin, M.-Y. Chen, K.-S. Chang

{"title":"Solution-Based Fabrication of Ag/Anatase-/Rutile-TiO2 Composites for Visible-Light Photocatalytic Applications","authors":"C.-T. Wu, T. N. N. Nguyen, M.-Y. Lin, M.-Y. Chen, K.-S. Chang","doi":"10.1007/s11244-025-02246-1","DOIUrl":null,"url":null,"abstract":"<div><p>Multijunction composites of Ag-decorated anatase-/rutile-TiO<sub>2</sub> (Ag/A-/R-TiO<sub>2</sub>) heterostructures were synthesized for efficient visible-light-driven photodegradation and disinfection. The A-TiO<sub>2</sub> layer was spin-coated onto the hydrothermally grown R-TiO<sub>2</sub> nanorod array films, followed by decoration with Ag nanoparticles via chemical reduction on the A-/R-TiO<sub>2</sub> surface. The crystalline phases, morphologies, microstructures, and optical properties of the prepared samples were investigated. The composite after forming gas annealing (Ag/A-/R-TiO<sub>2</sub>–FGA) exhibited outstanding photodegradation performance, achieving 100% degradation of Rhodamine B in 80 min under visible-light irradiation. The sample also exhibited promising antibacterial performance, with approximately 82% of bacteriophage MS2 disinfected in 40 min under visible-light irradiation. Energy band structures were constructed to elucidate these superior activities, which were synergistically caused by improved visible-light absorption owing to multiple light scattering in the R-TiO<sub>2</sub> nanorod arrays, localized surface plasmon resonance induced by the reduced oxidation of the Ag nanoparticles, and charge carrier transport facilitated by the formation of multi-heterojunctions and a dye-sensitized process. Our results highlight the potential of the Ag/A-/R-TiO<sub>2</sub> composite for practical environmental applications under visible light illumination.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"69 15-16","pages":"2161 - 2174"},"PeriodicalIF":3.7000,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Topics in Catalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11244-025-02246-1","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

Multijunction composites of Ag-decorated anatase-/rutile-TiO₂ (Ag/A-/R-TiO₂) heterostructures were synthesized for efficient visible-light-driven photodegradation and disinfection. The A-TiO₂ layer was spin-coated onto the hydrothermally grown R-TiO₂ nanorod array films, followed by decoration with Ag nanoparticles via chemical reduction on the A-/R-TiO₂ surface. The crystalline phases, morphologies, microstructures, and optical properties of the prepared samples were investigated. The composite after forming gas annealing (Ag/A-/R-TiO₂–FGA) exhibited outstanding photodegradation performance, achieving 100% degradation of Rhodamine B in 80 min under visible-light irradiation. The sample also exhibited promising antibacterial performance, with approximately 82% of bacteriophage MS2 disinfected in 40 min under visible-light irradiation. Energy band structures were constructed to elucidate these superior activities, which were synergistically caused by improved visible-light absorption owing to multiple light scattering in the R-TiO₂ nanorod arrays, localized surface plasmon resonance induced by the reduced oxidation of the Ag nanoparticles, and charge carrier transport facilitated by the formation of multi-heterojunctions and a dye-sensitized process. Our results highlight the potential of the Ag/A-/R-TiO₂ composite for practical environmental applications under visible light illumination.

Graphical Abstract

查看原文本刊更多论文

银/锐钛矿/金红石- tio2可见光催化复合材料的溶液制备

合成了Ag修饰锐钛矿-/金红石- tio2 （Ag/A-/R-TiO2）异质结构的多结复合材料，用于高效的可见光降解和消毒。将A- tio2层自旋涂覆在水热生长的R-TiO2纳米棒阵列薄膜上，然后在A-/R-TiO2表面化学还原镀银纳米粒子。研究了制备样品的晶相、形貌、显微结构和光学性能。形成气体退火后的复合材料（Ag/A-/ R-TiO2-FGA）表现出优异的光降解性能，在可见光照射下80 min内对罗丹明B的降解率达到100%。该样品还显示出良好的抗菌性能，在可见光照射下，约82%的噬菌体MS2在40分钟内被消毒。研究人员构建了能带结构来解释这些优越的活性，这些活性是由R-TiO2纳米棒阵列中多次光散射提高可见光吸收、Ag纳米颗粒氧化还原引起的局部表面等离子体共振以及多异质结的形成和染料敏化过程促进的载流子传输协同引起的。我们的研究结果突出了Ag/A-/R-TiO2复合材料在可见光照明下的实际环境应用潜力。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.