High-efficiency reduction of <i>p</i>-nitrophenol on green-synthesized gold nanoparticles decorated on ceria nanorods

Ho, Thanh Gia-Thien; Long, Ba; Pham, Bao Van; Nguyen, Thi Thuy; Phan, Hồng Phương; Nguyen, Hoang Bao; Vo, Pham Phuong Trang; Tri, Nguyen

doi:10.1039/d2ra04557e

Cited by 11 publications

(1 citation statement)

References 54 publications

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“…After calcination, the peak pattern of pCeO 2 was sharper than that of the CeO 2 nanorods. After the modification of AuNPs, a weak diffraction peak appeared at 38.4 • , indicating the successful preparation of the Au-pCeO 2 nanozyme [39]. Moreover, our Au-pCeO 2 nanozyme still had a similar crystal structure compared to pCeO 2 , so our nanozymes have the two features of AuNPs and pCeO 2 , which could provide the chance for the synergistic effect of heterogeneous nanozymes.…”

Section: Comparison Of Ceo 2 Pceo 2 and Au-ceo 2 Nanozymesmentioning

confidence: 82%

A Colorimetric Sensor Enabled with Heterogeneous Nanozymes with Phosphatase-like Activity for the Residue Analysis of Methyl Parathion

Zhao

Wang

et al. 2023

Foods

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In this study, a colorimetric sensor was developed for the detection of organophosphorus pesticides (OPs) using a heterogeneous nanozyme with phosphatase-like activity. Herein, this heterogeneous nanozyme (Au-pCeO2) was obtained by the modification of gold nanoparticles on porous cerium oxide nanorods, resulting in synergistic hydrolysis performance for OPs. Taking methyl parathion (MP) as the target pesticide, the catalytic performance and mechanism of Au-pCeO2 were investigated. Based on the phosphatase-like Au-pCeO2, a dual-mode colorimetric sensor for MP was put forward by the analysis of the hydrolysis product via a UV-visible spectrophotometer and a smartphone. Under optimum conditions, this dual-mode strategy can be used for the on-site analysis of MP with concentrations of 5 to 200 μM. Additionally, it can be applied for MP detection in pear and lettuce samples with recoveries ranging from 85.27% to 115.87% and relative standard deviations (RSDs) not exceeding 6.20%, which can provide a simple and convenient method for OP detection in agricultural products.

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Section: Comparison Of Ceo 2 Pceo 2 and Au-ceo 2 Nanozymesmentioning

confidence: 82%

A Colorimetric Sensor Enabled with Heterogeneous Nanozymes with Phosphatase-like Activity for the Residue Analysis of Methyl Parathion

Zhao

Wang

et al. 2023

Foods

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Diacetyl Monoxime‐Based N∩N Donor Schiff Base and Its Zn(II) Complexes. In Vitro and In Silico Analysis

Shahriari,

Shahraki,

Dehghanian

2024

Applied Organom Chemis

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Schiff bases are introduced as versatile pharmacophores for the design and development of various bioactive compounds. Oxime‐based Schiff base ligands form an important and flexible class of ligands that have attracted attention due to their wide applications in various fields. Here, novel 3‐(2‐hydroxyphenyl‐imino)butan‐2‐one oxime, (HPIO) Schiff base and Zn(II) complexes derived from it, [Zn(bpy)(HPIO)](NO3)2, C1, (bpy = 2,2′‐bipyridine) and [Zn(HPIO)2]Cl2, C2, were synthesized and characterized. Theoretical studies showed that both complexes are reactive and have high pharmacological affinity. Experimental investigations were done to compare some biological properties of the complexes. Antioxidant studies using ·DPPH (2,2‐diphenyl‐1‐picrylhydrazyl) assay presented the following trend: C1 > C2 > HPIO. Considering the importance of the antioxidant enzyme catalase in removing reactive oxygen species (ROS), the binding process of C1/C2 with catalase was evaluated. Kinetic studies showed that C1/C2 can inhibit the catalytic performance of catalase by mixed‐type inhibition mechanism. The C1 and C2 quenched the catalase fluorescence emission with static quenching mechanism. The binding affinity to catalase was higher for C1 than C2 (Kb = 1.51 and 0.89 × 105 M−1 for C1 and C2, respectively at 305 K). In C1/C2 interaction with catalase, which was an exothermic and spontaneous process, hydrogen bonds, van der Waals forces, and hydrophobic interactions played a decisive role and strongly confirmed by molecular docking data. Tracking the structural changes of catalase showed that enzyme undergoes structural changes in the presence of both complexes.

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Green Synthesis of Nanosilver Decorated on Ceria Nanorod for the Catalytic Reduction of Methyl Orange

Bui,

Pham,

Truong

et al. 2023

Arab J Sci Eng

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

Abstract: A green synthesis using extract from Citrus maxima peel was developed to fabricate Au–Ce catalysts for the reduction of p-nitrophenol (PNP).

Cited by 11 publications

References 54 publications

A Colorimetric Sensor Enabled with Heterogeneous Nanozymes with Phosphatase-like Activity for the Residue Analysis of Methyl Parathion

A Colorimetric Sensor Enabled with Heterogeneous Nanozymes with Phosphatase-like Activity for the Residue Analysis of Methyl Parathion

Diacetyl Monoxime‐Based N∩N Donor Schiff Base and Its Zn(II) Complexes. In Vitro and In Silico Analysis

Green Synthesis of Nanosilver Decorated on Ceria Nanorod for the Catalytic Reduction of Methyl Orange

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