JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Pancras Ndokoye,Qidong Zhao,Xinyong Li,Tingting Li,Moses O. Tade,Shaobin Wang
In this study, we demonstrate for the first time that highly branched gold nanostars (AuNSs) and silica-coated AuNSs (AuNSs@mSiO 2 ) could potentially serve as efficient hydrogenation catalysts. The catalytic activity could be promoted by raising the number of tipped-branches of AuNSs, which reveals that the tips play an important role as active sites. The fabricated sharply-pointed AuNSs benefit the electron transfer from BH 4 anions to 4-nitrophenol. Coating AuNSs with mesoporous silica (AuNSs@mSiO 2 ) further enhanced the reduction rate and recyclability, and also contributed to reducing the induction period. The AuNSs@mSiO 2 (50–100 nm in diameter) are large enough to be catalytically inactive, but they consist of sharply-pointed tips with the radius of 2.6–3.6 nm, which are rich in coordinately unsaturated sites similar to those of nanoparticles and clusters. Such features in structure and activity would also extend their application range in heterogeneous catalysis .
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JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 14
·1486-1494
·
IF 3.4
Chenqi Zhao,Penghua Yan,Ruofan Liu,Wei Li,Yushun Jin,Qisong shi,Yibo Wu
The cationic polymerization of isobutene vinyl ether(IBVE) contains waters system was achieved by using triphenylmethylium tetrakis-(pentafluorophenyl)borate [Ph 3 C][B(C 6 F 5 ) 4 ], which overcame the harsh experimental requirements of traditional cationic polymerization. The influences of water content, solvent polarity, and reaction temperature on polymerization were studied. The end structure of the polymer was analyzed by 1 H-NMR. Combined with the effect of the proton trapping agent and triethylamine salt which can trap [H + ], it was found that there was a reversible equilibrium between [Ph 3 C + ] and [H + ] active species during the polymerization process. The cationic polymerizations of isobutyl vinyl ether were initiated by these two active species simultaneously. The controllable cationic polymerization of isobutyl vinyl ether was achieved by the addition of ethyl methyl carbonate and ethyl benzoate. Gaussian 09 W simulation confirms the polymerization mechanism. Graphical
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JOURNAL OF CHROMATOGRAPHY A
·
2021
·
IF 4.759
Jingjing Han,Huiqi Wang,Zhanfeng Li,Zonghua Wang
Chitosan-modified magnetic Schiff base network composite nanospheres (Fe 3 O 4 @SNW@Chitosan) were prepared for the enrichment and detection of hippuric acid (HA) and 4-methyl hippuric acid (4-MHA) via magnetic solid phase extraction (MSPE) connected with HPLC. The SNW was one of the covalent organic framework, which constructed through covalent bonds, shown comprising solvent stability, low density and accessible pores. The obtained Fe 3 O 4 @SNW@Chitosan has many merits as a magnetic sorbent, including a hydrophilic surface, uniform pore size, unique ordered channel structure, and superparamagnetism. The favourable linearity of this MSPE-HPLC method was in the range of 1-1000 μg L −1 , and LODs of HA and 4-MHA were 0.3 μg L −1 and 0.2 μg L −1 , respectively. The recoveries in urine samples were range from 95.3 to 109.0 % with the RSD less than 9.6 %. When employed for the enrichment of HA and 4-MHA, Fe 3 O 4 @SNW@Chitosan exhibited great potential as a candidate for preconcentration.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7035-7041
·
IF 3.288
Mufei Liu,Hao Yang,Zewen Xu,Wenlu Ma,Fang Cui,George Lu,Linxu Xu,Tieyu Cui
Based on green chemistry, 3D hierarchical ZnO microflowers (MFs) constructed from layered 2D nanosheets have been designed as carriers to uniformly load PdO/Pd nanoparticles by the calcination of the precursor (ZnO/Pd(II) microflowers) in air. The ZnO/Pd(II) microflowers are prepared by dipping the 3D ZnO MFs in an ethanolic solution of PdCl2 without involving additional agents. The as-prepared 3D hierarchical ZnO microflowers are a stable support to enhance the dispersibility of PdO/Pd nanoparticles to achieve better catalytic performance for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). In addition, the synergistic effect between the PdO and Pd nanoparticles is another major driver that promotes the catalytic process. Over 98% of 4-NP is reduced within 7 min. Furthermore, structural analysis of the ZnO/PdO/Pd microflowers can provide useful information for understanding structure-performance relationships.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zelin Meng,Yang Liu,Mingyang Song,Na Wang,Heming Zhao,Yang Wang,Shuai Bai,Jianglei Hu,Ruiping Shi
A sustainable one-pot co-condensation strategy was developed for the fabrication of sodium alginate (SA)-silica hybrid carriers (SA-SiO 2 ), via the covalent cross-linking via carboxyl and hydroxyl groups. The SA-SiO 2 matrix was used as a bio-based platform to immobilize Cu 2+ ions via carboxyl coordination, enabling in situ growth of MOF-199 crystals (denoted as MOF-199@xSA-SiO 2 ). FT-IR, XPS, and UV–vis demonstrated the successful cross-linking of SA with SiO 2 , the effective loading of MOF-199 through −COOH in the SA matrix, and the strong interaction between the carrier SA-SiO 2 and MOF-199. Additionally, SEM and N 2 adsorption-desorption analyses showed that the MOF-199@xSA-SiO 2 composites exhibited a spongy pore structure and possessed a typical mesoporous structure. The [email protected] 2 composite exhibited good catalytic activity in the reduction of 4-NP to 4-AP. Under optimal reaction conditions, the K app of the 4-NP reduction reaction was 0.45 min −1 . In contrast, the MOF-199/0.15SA-SiO 2 composite that was prepared using a post-synthesis method achieved a K app of only 0.11 min −1 . The catalyst maintained 98.23 % conversion of 4-NP five cycles, demonstrating good catalytic activity and stability. This study highlights the dual roles of SA as a porous guide and a metal ligand site, providing a green pathway for designing polysaccharide-MOF complexes for efficient environmental catalysis.
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2025
·
IF 4.3
Shicong Liu,Yuanyuan Zhang,Dan Jia,Junqiu Liu,Chunxi Hou
A fluorescent probe based on fluorescent resonance energy transfer (FRET) between the organic fluorophore 1,3,6,8-tetra(4-pyridyl) pyrene (TTPY) and gold nanoparticles (AuNPs) was designed for detecting glutathione (GSH) in foods. TTPY, synthesized via a Suzuki–Miyaura coupling reaction, exhibited excellent fluorescence properties with a maximum emission wavelength of 496 nm. Acting as an energy donor, TTPY transfers energy to AuNPs via FRET, resulting in fluorescence quenching of TTPY. In the presence of GSH, TTPY was displaced from the AuNP surface, restoring the fluorescence of the TTPY chromophore. The developed sensor demonstrated excellent water solubility and selectivity and a low detection limit (54 nM). Moreover, the proposed method was successfully applied for the determination of GSH in food samples, demonstrating its potential for food antioxidant analysis.
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产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Shuai Wang,Jiayang Li,Cong Xie,Wanhui Chen,Huajie Feng,Wenying He
Our previous study found that 1-(4-bromophenyl)-5-phenyl-1H-1,2,3-triazole (BPT) exhibited very low toxicity and higher biology activity. In the present study, BPT was used to investigate its mechanism against Colletotrichum gloeosporioides in mango by chemical proteomics and chemicobiological methods. The experimental results of some phenotypic traits and cytotoxicity indicated that there are some changes in permeability of the cell membranes and BPT has fungistatic activity with lower cytotoxicity. Next, a biotin probe named BPTN with a higher activity (EC 50 value of 11.08 mg/L) than that of BPT(EC 50 value of 14.13 mg/L) was designed and synthesized by the chemical proteomics approach. The major differentially expressed proteins between BPT or BPTN and Colletotrichum gloeosporioides were identified and analyzed by Matrix-assisted laser desorption time-of-flight mass spectrometry (MALDI-TOF-MS) and bioinformatics. The results indicated that there are 25 differentially expressed proteins in Colletotrichum gloeosporioides under BPT intervention, and 29 target proteins in Colletotrichum gloeosporioides captured by BPTN. For BPTN-anthracnose system, the protein No. 8 belonged to cytochrome P450 proteins (CYP) family can be taken as a target protein of BPTN, which confirmed by bioinformatics analysis. Further, a classic fungal target protein of triazoles, sterol 14α-demethylase (CYP51) was used to verify the interaction in the presence of BPT by various spectroscopic and molecular docking methods. The results showed that BPT exhibited strong interactions with CYP51 and it was predominantly driven by hydrophobic forces and hydrogen bonds. The present study has significant theoretical and practical implications for the development of novel 1,2,3-triazole antifungal agents.
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Solar RRL
·
2024
·Vol. 8
·期 13
·2400245
·
IF 6
Kai Fang,Jintao Wang,Shuming Chen,Ning Jiang,Hao Liu,Jian Zhang,Chuannan Li,Yu Duan
Organic–inorganic hybrid perovskite solar cells (PSCs) are ideal candidates for the new generation of photovoltaics (PV) due to their excellent physical and chemical properties. However, the active layer of perovskite may have many defects such as vacancies, interstitials, and substitutions during the solution method preparation process. The defects in films can become fast channels for moisture-oxygen penetration, which promotes the interaction of moisture and oxygen with the defects and accelerates the degradation of PV in air, significantly limiting the efficiency and stability of PSCs. Herein, the curing agent 4-(2-carboxyvinyl) benzoic acid is added to the perovskite precursor solution to enhance the device stability by forming a moisture-oxygen-blocking barrier at the grain boundaries, at the same time, the Lewis base property of the molecule plays a key role to realize the preferred crystal orientation of perovskite films, passivate the defects and enhance the PV performance, which can significantly improve the devices efficiency. The final optimized PSCs achieve an outstanding power conversion efficiency of 20.28% and show excellent stability, with the unencapsulated device maintaining 78% of its initial efficiency after 1000 h of under ambient environment.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Jie Shi,Rongfei Ye,Yuanyuan Yue,Jiangyong Liu
As we strive towards a sustainable future in the field of catalysis, it is imperative to draw inspiration from Mother Nature. In this study, we present a straightforward and environmentally friendly approach for the in situ synthesis of nickel metal nanoparticles encapsulated within nitrogen-doped carbon (NNC), derived from daikon biomass. Among the various examined NNC catalysts, NNC-2 characterized by its substantial surface area and high doping content, emerges as the most promising candidate for catalyzing the reduction of 4-nitrophenol. Ab initio molecular dynamics simulations unveil that NNC-2 facilitates a robust Ni-NC interfacial interaction, which stabilizes Ni nanoparticles and supports the exceptional durability and recyclability. Theoretical calculations further elucidate the structure–activity relationship of the catalyst and the mechanistic aspects of the surface reduction of 4-nitrophenol. This insight enhances our understanding of the catalytic processes over carbon-based catalysts, providing a foundation for optimizing catalytic performance and guiding future developments in the field.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Qiao Yan,Xiao-Yu Wang,Jiu-Ju Feng,Li-Ping Mei,Ai-Jun Wang
Water pollution caused by organic pollutants has aroused great concern to earth sustainability in the last several decades. Herein, a facile one-pot solvothermal approach was developed to construct bimetallic platinum-rhodium alloyed nano-multipods (PtRh ANMPs) in oleylamine (OAm) by adopting creatinine and cetyltrimethylammonium chloride (CTAC) as the co-structure-directing agents. The as-fabricated nanocatalyst exhibited extraordinary catalytic behaviors towards 4-nitrophenol (4-NP) and rhodamine B (RhB) reduction by sodium borohydride (NaBH 4 ). Impressively, the resultant catalyst showed highly facilitated rate constant ( k : 0.209/0.354 min −1 ) and turnover frequency (TOF: 1.0 × 10 −3 /0.44 × 10 −3 mol g −1 min −1 ) towards 4-NP and RhB reduction in comparison with commercial Pt black under the same conditions. This research offers some valuable insights for facile preparation of advanced nanostructures as efficient and recyclable catalyst in environmental remediation field.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Shijian Zhou,Chunxia Liu,Weiming Jin,Lingling Pan,Qichao Jiang,Yingjie Hu,Yan Kong
Noble-metal nanoparticles (NPs), due to their high surface energy, suffer from serious problems, such as ease of agglomeration at high temperatures, which unfortunately causes a significant decline in their original catalytic activity during the reaction and recycling processes. To solve these problems, in this work, a multiple-step synthetic method is proposed to construct an advanced core–shell structure by anchoring ultrasmall Au nanoparticles on the inner surface of mesoporous Co3O4 (m-Co3O4). The m-Co3O4, which has a high surface area, is fabricated by a hard-templating method, and the ultrasmall Au NPs (1.9 nm) are confined to the inner surface of the m-Co3O4. The target sample of Au–m-Co3O4 is found to achieve the highest catalytic efficiency in the probe reaction of the catalytic reduction of 4-nitrophenol to 4-aminophenol, and more importantly, thermal stability tests demonstrate that the Au–m-Co3O4 catalyst is more stable at higher temperatures. Furthermore, DFT calculations have verified that both activated hydrogen adsorption and 4-aminophenol desorption are significantly promoted on the surface of the Au–m-Co3O4 catalyst due to a strong synergetic effect between Au and the m-Co3O4. The construction of this advanced architecture for Au-based catalysts could provide a facile method for stabilizing ultrasmall noble-metal NPs and reasonably designing noble-metal catalysts with desirable activity and stability.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2020
·
IF 5.647
Yang Wang,Pengcheng Gao,Yingying Wei,Yajin Jin,Si Sun,Zhifei Wang,Yong Jiang
A facile and cost-effective preparation of silver nanoparticles decorated magnetic composite for the effective catalytic degradation of 4-nitrophenol (4-NP) and Methylene blue (MB) and Rhodamine B (RhB) was investigated. Fe 3 O 4 @Polystyrene@Ag (Fe 3 O 4 @PS@Ag) catalyst was prepared via a two-step procedure. Firstly, carboxyl groups modified magnetic microspheres (Fe 3 O 4 @PS-COOH) has been successfully synthesized by microemulsion polymerization. Then Ag ions were adsorbed and in-situ reduced on the surface of Fe 3 O 4 @PS microspheres . To estimate the catalytic activity of Fe 3 O 4 @PS@Ag catalyst, the reduction experiments of MB, RhB and 4-NP were performed in the presence of NaBH 4 . The results indicated that Fe 3 O 4 @PS@Ag catalyst has a good catalytic performance and these dyes can be reduced in a very short time, which the apparent rate coefficients are 0.0089 s −1 , 0.0187 s −1 and 0.0086 s −1 for MB, RhB and 4-NP respectively. In addition, it could be easily collected from aqueous solution by a magnet so that the catalyst could be recovered and reused after the catalytic process. The catalytic activity was still high after seven cycles. This catalytic reaction is in agreement with the pseudo-first-order kinetic equation . Furthermore, the as-prepared Fe 3 O 4 @PS@Ag catalyst outperforms other catalysts in the degradation of these organic dyes.
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