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Mondal I, Samanta D, Shaik MAS, Shaw M, Bhattacharya A, Basu R, Pathak A. Influence of Nitrogen-Doped Carbon Dots on H • Radical-Mediated Au-H Formation in the Hydrogenation of 4-Nitrophenol Using NCDs-Au Nanohybrids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39186469 DOI: 10.1021/acs.langmuir.4c02422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
The hydrogenation of 4-nitrophenol using carbon dot-stabilized gold (Au) nanoparticles is well-studied, with Au-H species known to catalyze the reaction. However, the impact of specific nitrogen moieties in nitrogen-doped carbon dots on Au-H formation and catalytic activity remains unexplored. These nitrogen species, acting as surface ligands, may influence the catalytic properties through the generation of Au-H species via H• radicals. In this regard, modulation of the catalytic properties of Au nanoparticles has been explored by conjugating their surface with nitrogen-doped carbon dots (NCDs). Three distinct nanohybrid formulations comprising NCDs and Au nanoparticles (i.e., NCDs-Au) have been prepared, where the NCDs were derived from different carbon sources (e.g., citric acid and l-malic acid) and varying mole ratios of the nitrogen source (i.e., urea). The impact of NCDs on Au nanoparticle-mediated catalysis has been investigated using the model reaction of hydrogenation of 4-nitrophenol (4-NP) in the presence of NaBH4. The fractions of different nitrogen species (such as pyrrolic, pyridinic, and amidic) in the different NCDs-Au nanohybrids were quantified through XPS analysis, and their roles in catalytic performance have been studied. Further, the size, shape, crystallinity, defects, and exposed facets of the NCDs-Au nanohybrids have also been assessed (through XRD, HRTEM, and Raman studies), and their structure-activity relationships have been corroborated. The hydrogenation of 4-NP is proposed to happen through the formation of gold-hydride (Au-H) species facilitated by H• radicals, as confirmed by EPR analysis. The NCDs-Au nanohybrid, synthesized from NCDs derived from a 1:3 molar ratio of l-malic acid and urea (MU13-Au), exhibits superior catalytic efficiency with a rate constant of 1.013 min-1, attributed to its abundant defects and a notably high relative content of catalytically favorable pyridinic nitrogen species compared to other tested nanohybrids.
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Affiliation(s)
- Imran Mondal
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Dipanjan Samanta
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Md Abdus Salam Shaik
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Manisha Shaw
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Angana Bhattacharya
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Rajarshi Basu
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
| | - Amita Pathak
- Department of Chemistry, Indian Institute of Technology, Kharagpur, W.B., 721302, India
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Liang B, Qin F, Yang R, Zheng S, Xu Y, Bai Y, Ma Y, Dai K, Tang Y, Zhang C, Hu C, Zhang R. The precursors’ feeding ratio of NCQDs/NaBiO3•2H2O induced the modulation of hydrothermal reaction products and their photocatalytic properties. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Li B, Hu Y, Shen Z, Ji Z, Yao L, Zhang S, Zou Y, Tang D, Qing Y, Wang S, Zhao G, Wang X. Photocatalysis Driven by Near-Infrared Light: Materials Design and Engineering for Environmentally Friendly Photoreactions. ACS ES&T ENGINEERING 2021; 1:947-964. [DOI: doi.org/10.1021/acsestengg.1c00103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Affiliation(s)
- Bingfeng Li
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
- School of Life Science, Shaoxing University, Shaoxing 312000, China
| | - Yezi Hu
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Zewen Shen
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Zhuoyu Ji
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Ling Yao
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Sai Zhang
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Yingtong Zou
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Duoyue Tang
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Yujia Qing
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Shuqin Wang
- School of Life Science, Shaoxing University, Shaoxing 312000, China
| | - Guixia Zhao
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
| | - Xiangke Wang
- College of Environment Science & Engineering, North China Electric Power University, 102206 Beijing, China
- School of Life Science, Shaoxing University, Shaoxing 312000, China
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