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Article

Application of Self-Assembled Raman Spectrum-Enhanced Substrate in Detection of Dissolved Furfural in Insulating Oil

1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
2
Chengdu Power Supply Company, Chengdu 610041, China
3
Soft Matter and Interdisciplinary Research Center, Chongqing University, Chongqing 400044, China
4
State Grid Zhejiang Electric Power Company, Hangzhou 310000, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(1), 17; https://doi.org/10.3390/nano9010017
Received: 21 November 2018 / Revised: 14 December 2018 / Accepted: 19 December 2018 / Published: 23 December 2018
Accurate detection of dissolved aging features in transformer oil is the key to judging the aging degree of oil-paper insulation. In this work, in order to realize in situ detection of furfural dissolved in transformer oil, silver nanoparticles were self-assembled on the surface of gold film with P-aminophenylthiophenol (PATP) as a coupling agent. Rhodamine-6G (R6G) was used as the probe molecule to test the enhancement effect. By optimizing the molecular concentration, molecular deposition time, and silver sol deposition time of PATP, the nanoparticles were made more uniform and compact, and an enhanced substrate with rich hot spots was obtained. The optimum substrate was developed, and surface-enhanced Raman spectroscopy (SERS) detection of trace furfural dissolved in transformer oil was realized. The results showed that the substrate prepared under the conditions of 0.1 mol/L PATP, 5 h deposition in PATP and 12 h immersion in silver sol, had the best reinforcement effect (that is, uniform and compact particle arrangement and no particle clusters). By use of this substrate, the minimum detectable concentration of furfural in transformer oil was about 1.06 mg/L, which provides a new method for fast and nondestructive detection of transformer aging diagnosis. View Full-Text
Keywords: surface-enhanced Raman spectroscopy; transformer aging; concentration detection surface-enhanced Raman spectroscopy; transformer aging; concentration detection
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MDPI and ACS Style

Shi, H.; Chen, W.; Wan, F.; Du, L.; Zhang, S.; Zhou, W.; Zhang, J.; Huang, Y.; Zhu, C. Application of Self-Assembled Raman Spectrum-Enhanced Substrate in Detection of Dissolved Furfural in Insulating Oil. Nanomaterials 2019, 9, 17. https://doi.org/10.3390/nano9010017

AMA Style

Shi H, Chen W, Wan F, Du L, Zhang S, Zhou W, Zhang J, Huang Y, Zhu C. Application of Self-Assembled Raman Spectrum-Enhanced Substrate in Detection of Dissolved Furfural in Insulating Oil. Nanomaterials. 2019; 9(1):17. https://doi.org/10.3390/nano9010017

Chicago/Turabian Style

Shi, Haiyang, Weigen Chen, Fu Wan, Lingling Du, Shuhua Zhang, Weiran Zhou, Jiayi Zhang, Yingzhou Huang, and Chengzhi Zhu. 2019. "Application of Self-Assembled Raman Spectrum-Enhanced Substrate in Detection of Dissolved Furfural in Insulating Oil" Nanomaterials 9, no. 1: 17. https://doi.org/10.3390/nano9010017

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