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

Tiến sĩChâu Tấn PhátVan Thuan Le, Truong Giang Duong, Van Tan Le, Thanh Long Phan, Thi Lan Huong Nguyen, Van-Dat Doan

Viện Khoa học Công nghệ Ứng dụng

Thể loại: Bài báo

Sơ lược nội dung

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 À1 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 mM in a linear range of 0-1000 mM. 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.

Thông tin chung
Thể loại
Bài báo
Năm xuất bản
Thg5 2021
Ngôn ngữ gốc
Tiếng Anh
Tạp chí công bố
RSC Advances
Ấn phẩm số
Vol. 11
Loại tạp chí
Danh mục ISI/Scopus
Chất lượng

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