文献类型：期刊文献

英文题名：Synthesis of graphene quantum dots with temperature-sensitive properties from sea rice for rapid and highly selective detection of 4-nitrophenol

作者：Luo, Kun[1];Luo, Xiaoyu[1];Wu, Yulian[1];Liang, Zhibin[1];Kang, Xinhuang[1];Wen, Yanmei[1]

机构：[1]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China

年份：2023

卷号：135

外文期刊名：DIAMOND AND RELATED MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000957365500001)、、EI(收录号：20231213752663)、Scopus(收录号：2-s2.0-85150238748)、WOS

基金：This work was supported by the Natural Science Foundation of Guangdong [No. 2021A1515010304] ; Project of Enhancing School with Innovation of Guangdong Ocean University [No. 230419054] ; and Laboratory of Marine Chemistry Resource Utilization and Research [No. Q17092] .

语种：英文

外文关键词：Biomass; Fluorescence; 4-Nitrophenol detection; Green synthesis; Temperature-sensitive; Graphene quantum dots

外文摘要：The green transformation of biomass materials into carbon nanomaterials with high application value has always been of great interest. In this study, we successfully synthesized temperature-sensitive and narrow-size distribution graphene quantum dots (GQDs) via mild oxidation, which were derived from 250 degrees C carbonized sea rice. This synthetic approach is green, supports large-scale operations, and consumes low amounts of energy. Through the use of TEM, DLS, AFM, XRD, Raman, FTIR, XPS, UV-vis, and PL technologies characterized GQDs. The GQDs exhibited good dispersion, temperature-sensitive properties, light stability, and tunable photoluminescence. The GQDs particle sizes were 1.20 +/- 0.40 nm, and lambda em = 458 nm at 340 nm excitation. Furthermore, we successfully detected trace amounts of 4-nitrophenol (4-NP), which exhibited a significant linear correlation between 0 and 1000 mu M; the detection limit was 0.034 mu M. The GQDs fluorescence probe was selective even with the distractors. Additionally, the quenching between the GDQs and 4-NP was caused by the internal filtering effect. Standard recovery experiments indicated that the recovery rates ranged from 97.6 % to 101.3 % for real water samples. Our research serves as a foundation for the creation of high-performance temperature-sensitive sensor devices for use in biomedical and environmental applications.