Effective reduction of nitrophenols and colorimetric detection of Pb(ii) ions by Siraitia grosvenorii fruit extract capped gold nanoparticles.

Autor:	Le VT; Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University 03 Quang Trung Da Nang City 550000 Vietnam.; The Faculty of Environmental and Chemical Engineering, Duy Tan University 03 Quang Trung Da Nang City 550000 Vietnam., Duong TG; Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Ho Chi Minh City 700000 Vietnam doanvandat@iuh.edu.vn., Le VT; Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Ho Chi Minh City 700000 Vietnam doanvandat@iuh.edu.vn., Phan TL; Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Ho Chi Minh City 700000 Vietnam doanvandat@iuh.edu.vn., Huong Nguyen TL; Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City Ho Chi Minh City 700000 Vietnam., Chau TP; Institute of Applied Science & Technology, Van Lang University Ho Chi Minh City 700000 Vietnam., Doan VD; Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Ho Chi Minh City 700000 Vietnam doanvandat@iuh.edu.vn.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2021 Apr 26; Vol. 11 (25), pp. 15438-15448. Date of Electronic Publication: 2021 Apr 26 (Print Publication: 2021).
DOI:	10.1039/d1ra01593a
Abstrakt:	This study presents a simple and green approach for the synthesis of Siraitia grosvenorii fruit extract capped gold nanoparticles (SG-AuNPs). The SG-AuNPs samples prepared under the optimized conditions were characterized by various techniques (UV-Vis, XRD, FTIR, HR-TEM, EDX, DLS). The biosynthesized nanoparticles were then studied for the reduction of 2-nitrophenol (2-NP) and 3-nitrophenols (3-NP) and for colorimetric detection of Pb 2+ ions. The characterization results revealed that the crystals of SG-AuNPs were spherical with an average size of 7.5 nm. The FTIR and DLS analyses proved the presence of the biomolecule layer around AuNPs, which played an important role in stabilizing the nanoparticles. The SG-AuNPs showed excellent catalytic activity in the reduction of 3-NP and 2-NP, achieving complete conversion within 14 min. The catalytic process was endothermic and followed pseudo-first-order kinetics. The activation energy was determined to be 10.64 and 26.53 kJ mol -1 for 2-NP and 3-NP, respectively. SG-AuNPs maintained high catalytic performance after five recycles. The fabricated material was also found to be highly sensitive and selective to Pb 2+ ions with the detection limit of 0.018 μM in a linear range of 0-1000 μM. The practicality of the material was validated through the analyses of Pb 2+ in mimic pond water samples. The developed nanoparticles could find tremendous applications in environmental monitoring. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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