High-efficiency reduction of p -nitrophenol on green-synthesized gold nanoparticles decorated on ceria nanorods.

Autor: Gia-Thien Ho T; Institute of Chemical Technology, Vietnam Academy of Science and Technology No. 1A, TL29 Str., Thanh Loc Ward, Dist. 12 Ho Chi Minh City Vietnam ntri@ict.vast.vn., Do BL; Institute of Chemical Technology, Vietnam Academy of Science and Technology No. 1A, TL29 Str., Thanh Loc Ward, Dist. 12 Ho Chi Minh City Vietnam ntri@ict.vast.vn., Pham BV; Ho Chi Minh City University of Food Industry 140 Le Trong Tan Str. Ho Chi Minh City Vietnam., Nguyen TTV; Institute of Chemical Technology, Vietnam Academy of Science and Technology No. 1A, TL29 Str., Thanh Loc Ward, Dist. 12 Ho Chi Minh City Vietnam ntri@ict.vast.vn., Phan HP; Vietnam National University Ho Chi Minh City Linh Trung Ward, Thu Duc Dist. Ho Chi Minh City Vietnam.; Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet Str., Dist. 10 Ho Chi Minh City Vietnam., Nguyen HB; Vietnam National University Ho Chi Minh City Linh Trung Ward, Thu Duc Dist. Ho Chi Minh City Vietnam.; Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet Str., Dist. 10 Ho Chi Minh City Vietnam., Vo PPT; Ho Chi Minh City University of Food Industry 140 Le Trong Tan Str. Ho Chi Minh City Vietnam., Tri N; Institute of Chemical Technology, Vietnam Academy of Science and Technology No. 1A, TL29 Str., Thanh Loc Ward, Dist. 12 Ho Chi Minh City Vietnam ntri@ict.vast.vn.; Ho Chi Minh City Open University 97 Vo Van Tan Str. Ho Chi Minh City Vietnam.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2022 Sep 09; Vol. 12 (39), pp. 25753-25763. Date of Electronic Publication: 2022 Sep 09 (Print Publication: 2022).
DOI: 10.1039/d2ra04557e
Abstrakt: A green synthesis using extract from Citrus maxima peel was developed to fabricate Au-Ce catalysts for the reduction of p -nitrophenol (PNP). Au nanoparticles with a diameter of 6.6 ± 2.5 nm were deposited onto the surface of CeO 2 nanorods with a length of 33.1 ± 15.0 nm and a diameter of 7.1 ± 2.1 nm. The mesoporous and non-porous capillary structures of these materials were observed. The interaction between Au and CeO 2 increased the specific surface area, pore diameter, and pore volume compared with pure CeO 2 (90 m 2 g -1 , 23.8 Å, and 0.110 cm 3 g -1 versus 72 m 2 g -1 , 23.0 Å, and 0.089 cm 3 g -1 ). The splitting peaks of the surface oxygen and their shifting at lower temperatures compared with CeO 2 nanorods were found thanks to the Au-CeO 2 interaction, suggesting that their reduction occurred more easily. The synthesized Au-Ce catalysts exhibited excellent activity in the reduction of PNP to p -aminophenol. The 0.2Au-Ce catalyst was the most efficient one for PNP reduction, enabling the conversion of PNP in 30 minutes with a catalyst concentration of 20 mg L -1 and a PNP/NaBH 4 molar ratio of 1/200. Moreover, the 0.2Au-Ce catalyst could be reused for at least five consecutive cycles without considerable loss of its activity.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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