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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Catalytic degradation of methylene blue and in situ SERS monitoring

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亚甲基蓝的催化降解和原位 SERS 监测

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2025, Vol.48 No.6: 811-816

DOI: 10.3969/j.issn.1003-5060.2025.06.015

Authors

GENG Yuchuang, SU Mengke, WANG Xian, ZHENG Liqin, LIU Honglin

(School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China)

Abstract and Keywords

Abstract: In this paper, surface-enhanced Raman scattering (SERS) technique was used to monitor the degradation process of methylene blue in situ and in real time. Using silver nanowires and styrene-ethylene-butene-styrene (SEBS) block copolymer as materials, an efficient and universal SERS substrate was successfully prepared by interface assembly method. The substrate has a superhydrophobic effect and the contact angle reaches $ 121.3^{\circ} $, which ensures the in situ real-time monitoring of methylene blue degradation process. Meanwhile, the SERS response is extremely high. Experiments prove that the detection limit of methylene blue is as low as $ 10^{-13} $ mol/L. The substrate also has good signal reproducibility, with a relative standard deviation (RSD) of 9.26%. In addition, as a practical SERS substrate, it can catalyze the degradation of methylene blue by sodium borohydride. The results show that the SERS substrate has a good catalytic effect, and the degradation rate of methylene blue is up to 99.90% in 150 s.

Keywords: surface-enhanced Raman scattering (SERS); interface assembly; silver nanowires; block copolymer; methylene blue; catalytic degradation

作者信息

耿玉闯，苏梦可，王贤，郑立勤，刘洪林

（合肥工业大学食品与生物工程学院，安徽合肥230601）

摘要和关键词

摘要: 文章采用表面增强拉曼散射(surface-enhanced Raman scattering, SERS)技术对亚甲基蓝的降解反应过程进行原位实时监测。以银纳米线和苯乙烯-乙烯-丁烯-苯乙烯(SEBS)嵌段共聚物为材料，通过界面组装方法成功制备了高效、通用的SERS基底。该基底具有超疏水作用，接触角达到121.3°，保证了亚甲基蓝降解过程的原位实时监测；该基底具有超高的SERS响应，实验证明，基底对亚甲基蓝的检出限低至 $ 10^{-13} $ mol/L；具有良好的信号重现性，相对标准偏差(relative standard deviation, RSD)为9.26%。此外，作为一种实用的SERS基底，能够催化硼氢化钠对亚甲基蓝的降解，结果表明，SERS基底具有良好的催化效果，在150 s内亚甲基蓝的降解率高达99.90%。

关键词: 表面增强拉曼散射（SERS）；界面组装；银纳米线；嵌段共聚物；亚甲基蓝；催化降解

Funding

国家自然科学基金资助项目（21922403；22274034；22204039）；安徽省重点研究与开发计划资助项目（202104a07020013）和安徽省自然科学基金资助项目（2108085QB84）

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