期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 530, 期 -, 页码 361-371出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.06.069
关键词
Bi2S3; X-ray photoelectron spectroscopy; Amperometry; Hydrogen peroxide
资金
- National Research Foundation (NRF) of Republic of Korea [NRF-2014R1A6A1031189]
- Basic Science Research Program - Ministry of Education of Korea [NRF-2015R1D1A1A09060292]
- International Cooperation Program [NRF-2015K2A2A7053101]
This paper reports a facile solvothermal method for the synthesis of Bi2S3 flower-like nanostructures grown in situ on a nitrogen-doped reduced graphene oxide (Bi2S3@N-G) surface. Thiourea was used as the nitrogen source and reducing agent for graphene oxide. The surface morphology of the as-prepared Bi2S3@N-G composites was analyzed by field emission scanning electron microscopy and transmission electron microscopy. The crystalline structure and surface chemical states were examined by X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The as-prepared Bi2S3@N-G composite was deposited on a glassy carbon (GC) electrode, and the modified electrode was employed for the electrocatalytic detection of H2O2. The calculated diffusion coefficient and catalytic rate constant of the Bi2S3@N-G modified electrode were 4.9 x 10(-6) cm(2) s(-1) and 5671 M-1 s(-1), respectively. The Bi2S3@N-G/GC electrode demonstrated a wide concentration range for H2O2, from 10 to 42,960 mu M, with a sensitivity of 0.1535 mu A mu M-1 and an obtained limit of detection of 1.9 mu M. (C) 2018 Elsevier Inc. All rights reserved.
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