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Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A.
Environ Sci Technol. 2016 Apr 19; 50(8):4430-8.ES

Abstract

A photorefreshable and photoenhanced electrochemical sensing platform for bisphenol A (BPA) detection based on Au nanoparticles (NPs) decorated carbon doped TiO2 nanotube arrays (TiO2/Au NTAs) is described. The TiO2/Au NTAs were prepared by quick annealing of anodized nanotubes in argon, followed by controllable electrodeposition of Au NPs. The decoration of Au NPs not only improved photoelectrochemical behavior but also enhanced electrocatalytic activities of the resulted hybrid NTAs. Meanwhile, the high photocatalytic activity of the NTAs allowed the electrode to be readily renewed without damaging the microstructures and surface states after a short UV treatment. The electrochemical detection of BPA on TiO2/Au NTAs electrode was significantly improved under UV irradiation as the electrode could provide fresh reaction surface continuously and the further increased photocurrent resulting from the improved separation efficiency of the photogenerated electron-hole pairs derived from the consumption of holes by BPA. The results showed that the refreshable TiO2/Au NTAs electrode is a promising sensor for long-term BPA monitoring with the detection limit (S/N = 3) of 6.2 nM and the sensitivity of 2.8 μA·μM(-1)·cm(-2).

Authors+Show Affiliations

Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong. Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong.Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong. Key Laboratory of Biochip Technology, Shenzhen Biotech and Health Centre, City University of Hong Kong , Shenzhen 518057, People's Republic of China. State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.Department of Physics and Materials Science, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong. State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.Department of Physics and Materials Science, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong.Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong. Key Laboratory of Biochip Technology, Shenzhen Biotech and Health Centre, City University of Hong Kong , Shenzhen 518057, People's Republic of China. State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

27002339

Citation

Hu, Liangsheng, et al. "Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A." Environmental Science & Technology, vol. 50, no. 8, 2016, pp. 4430-8.
Hu L, Fong CC, Zhang X, et al. Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A. Environ Sci Technol. 2016;50(8):4430-8.
Hu, L., Fong, C. C., Zhang, X., Chan, L. L., Lam, P. K., Chu, P. K., Wong, K. Y., & Yang, M. (2016). Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A. Environmental Science & Technology, 50(8), 4430-8. https://doi.org/10.1021/acs.est.5b05857
Hu L, et al. Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A. Environ Sci Technol. 2016 Apr 19;50(8):4430-8. PubMed PMID: 27002339.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A. AU - Hu,Liangsheng, AU - Fong,Chi-Chun, AU - Zhang,Xuming, AU - Chan,Leo Lai, AU - Lam,Paul K S, AU - Chu,Paul K, AU - Wong,Kwok-Yin, AU - Yang,Mengsu, Y1 - 2016/03/31/ PY - 2016/3/23/entrez PY - 2016/3/24/pubmed PY - 2016/12/15/medline SP - 4430 EP - 8 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 50 IS - 8 N2 - A photorefreshable and photoenhanced electrochemical sensing platform for bisphenol A (BPA) detection based on Au nanoparticles (NPs) decorated carbon doped TiO2 nanotube arrays (TiO2/Au NTAs) is described. The TiO2/Au NTAs were prepared by quick annealing of anodized nanotubes in argon, followed by controllable electrodeposition of Au NPs. The decoration of Au NPs not only improved photoelectrochemical behavior but also enhanced electrocatalytic activities of the resulted hybrid NTAs. Meanwhile, the high photocatalytic activity of the NTAs allowed the electrode to be readily renewed without damaging the microstructures and surface states after a short UV treatment. The electrochemical detection of BPA on TiO2/Au NTAs electrode was significantly improved under UV irradiation as the electrode could provide fresh reaction surface continuously and the further increased photocurrent resulting from the improved separation efficiency of the photogenerated electron-hole pairs derived from the consumption of holes by BPA. The results showed that the refreshable TiO2/Au NTAs electrode is a promising sensor for long-term BPA monitoring with the detection limit (S/N = 3) of 6.2 nM and the sensitivity of 2.8 μA·μM(-1)·cm(-2). SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/27002339/Au_Nanoparticles_Decorated_TiO2_Nanotube_Arrays_as_a_Recyclable_Sensor_for_Photoenhanced_Electrochemical_Detection_of_Bisphenol_A_ L2 - https://dx.doi.org/10.1021/acs.est.5b05857 DB - PRIME DP - Unbound Medicine ER -