Small
·
2021
·Vol. 17
·期 46
·2103374
·
IF 13.281
Xiaowei Yu,Kaikai Liu,Hongyue Zhang,Bolun Wang,Wenyan Ma,Jiyang Li,Jihong Yu
Multilevel luminescence materials have aroused wide attention for their advanced anti-counterfeiting abilities. However, various complicated stimuli factors involved in multilevel luminescence anti-counterfeiting (MlLA) limit the practical applications of such materials. Herein, carbon dots (CDs) are in situ introduced into Eu-substituted AlPO 4 -5 zeolite (named CDs@EuAPO-5) via a solvent-free thermal crystallization method, which exhibits triple emissions including pink fluorescence mainly associated with Eu 3+ in the zeolite framework, blue fluorescence and green room temperature phosphorescence (RTP) associated with CDs. CDs are uniformly embedded in the EuAPO-5 zeolite matrix. Such composite displays excellent photo-, thermo-, and solvent resistance, as well as long-term storage-stability. Moreover, the triple emissions of the composite only need two kinds of common excitation lights to trigger, without involving other complicated stimuli. A triple-level luminescence anti-counterfeiting (TlLA) label has been built, realizing facile, quick, and advanced luminescence anti-counterfeiting that is hard to copy.
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高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Xu Li,Guodong Qi,Richard J. Lewis,Mark J. Howard,Barry A. Murrer,Brian Harrison,David J. Morgan,Christopher J. Kiely,Qian He,Thomas E. Davies,David J. Willock,Michael Bowker,Jingxian Cao,Feng Deng,Jun Xu,Graham J. Hutchings
The selective oxidation of methane to form methanol and acetic acid has been studied using AuPd nanoparticles supported on the zeolite H-ZSM-5 in water at 240 °C using molecular oxygen as the terminal oxidant in the absence of any added coreductant. The addition of Pd to Au/ZSM-5 significantly increases the selectivity to acetic acid to levels approaching almost complete selectivity within the oxygenated products. However, we observe that the reaction conditions employed lead to the corrosion of the stainless-steel components of the autoclave reactor and also leaching of iron from the ZSM-5 zeolite, and hence the AuPd nanoparticles, on reaction, become coated or partially coated with an oxidic Fe shell. The presence of the oxidized iron coating hinders nanoparticle agglomeration preventing deactivation of the AuPd/ZSM-5 catalyst but does not adversely affect the observed catalysis.
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yunyuan Dong,Qifu Zheng,Honglin Zhou,Kangqian Qiu,Chen Jin,Wenxiu Yuan,Xiang Shao,Qincheng Ma,Min Zhang,Jianming Liao,Xiaobin Chen,Ying Wang,Jun Tang
Selective oxidation of biomass compounds is one of the most important routes for the synthesis of high-value-added chemical intermediates, but multiple oxidation products are often generated during the oxidative process, resulting in poor selectivity. In this work, we construct raspberry-like amphiphilic polymeric nanoparticles by regulating the proportions of hydrophilic and hydrophobic monomers during polymerization using excess surfactant-stabilized microemulsion as templates. Next, the precursor on the surface of the polymers is converted to reactive 2,2,6,6-tetramethylpiperidoxyl (TEMPO) through a post-oxidation procedure to obtain a polymeric catalyst. Such amphiphilic polymer particles are used as efficient interfacial catalysts in an oil–water biphasic system, which can be tightly adsorbed at the biphasic interfaces to construct a Pickering emulsion system for improving catalytic efficiency. As a result, this TEMPO-mediated oxidation reaction resulted in >99.0% conversion of 5-hydroxymethylfurfural (HMF) with >99.0% selectivity toward 2,5-diformylfuran (DFF). Moreover, this interfacial catalytic system exhibited a high turnover frequency (TOF) value of 5.75 min–1, which outperformed superior catalytic activity compared to the reported results. At the end of the reaction, the CO2-responsive polymeric catalyst can be recovered and used for subsequent oxidation runs. This polymer-based Pickering emulsion system provides a promising route for the selective oxidation of high-value-added biomass compounds.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhefei Zhao,Minhao Chen,Fengjiao Jian,Siqi Wang,Linlin Zhang,Huajun Zheng
The electrochemical transformation of biomass-based compounds has been regarded as an economical and eco-friendly route. In this aspect, converting 5-hydroxymethylfurfural (HMF) to 2,5-bishydroxymethylfuran (BHMF) via electrocatalytic hydrogenation technology is a promising topic. Although Cu-based catalysts demonstrate excellent performance in numerous electrocatalytic hydrogenation processes, their efficacy in BHMF production requires further improvement. Herein, we report a nanodendritic CuAg-based electrocatalyst on copper foam (CF) substrates (CuAg/CF). The CuAg-based electrode exhibits superior performance with 96.9% of HMF conversion, 97.6% of BHMF selectivity, and 96.8% of faradic efficiency (FE), surpassing the pure Cu and Ag electrode. In-situ experiments combined with calculating analysis using density functional theory (DFT) demonstrate that the improved reactivity for BHMF generation on the CuAg bimetallic catalyst is owing to the regulated electronic structure of CuAg through the synergistic effect between Cu and Ag, which results in the facilitated adsorption of HMF and reduced reaction energy barrier of the rate-determining step, respectively.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 16
·11311-11321
·
IF 3.9
Tong Wan,Qianqian Zhang,Guocheng Jin,Shiai Xu
This work aims to determine the optimal conditions for emulsion cross-linking of chitosan (CHS) with various molecular weights using glutaraldehyde as a cross-linking agent to produce 5-fluorouracil-loaded CHS microspheres (5-FU/CHS). Their drug loading and encapsulation efficiencies are found to be in the range of 3.87–12.35% and 20.13–70.45%, respectively. The dynamic light scattering results show that 5-FU/CHS microspheres are micron-sized with a uniform size distribution, and the scanning electron microscopy results show that they are spherical. The results of thermogravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy demonstrate that 5-FU is successfully incorporated into the microspheres. The in vitro release tests show that 5-FU/CHS have a prolonged, pH-responsive release pattern of 5-FU, and the cumulative release rate under acidic condition is much larger than that under neutral conditions. The drug release kinetic analysis further demonstrates that the release of 5-FU can be well described by the Fickian diffusion model.
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Rui Zhu,Fang Gao,Xinglong Li
The development of efficient catalysts for the stepwise oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformyl furan (DFF), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), 5-Formyl-2-furancarboxylic acid (FFCA) or 2,5-furandicarboxylic acid (FDCA) is critical for biomass valorization. Herein, we reported a bimetallic Co-Mn catalyst anchored on nitrogen-doped porous carbon, which was used for the oxidation of HMF to FDCA, avoiding the use of high temperature and high-pressure oxygen. High FDCA selectivity (>95 %) was achieved through reaction condition optimization. And HMF→DFF→FFCA→FDCA was considered to be the main reaction pathway during the whole oxidation process. Additionally, the chemical environment of the constituent elements of the used catalyst was analyzed by XPS. TEM revealed that the catalyst retained its porous structure and excellent metal dispersion after the reaction. This structural stability was corroborated by sustained >90 % FDCA selectivity over five consecutive reaction cycles. This work established a dual-metal synergy strategy for multi-step oxidation pathways, offering insights into the design of robust catalysts for biomass-derived platform molecule upgrading.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Penglong Yao,Zhaosheng Yan,Aoqun Jian,Jinsuo Bai,Haoyu Wang,Xing Guo,Shengbo Sang,Chuangang Zhou,Dong Zhao,Xiushan Dong
The real-time detection of neurotransmitters had attracted more attention due to the potential to provide vital information for pathology research, disease diagnosis, and clinical efficacy evaluation. Here, a magnetic-mediated nano sensor was developed to improve sensitivity for detection of serotonin (5-HT). The PDMS membrane doped with magnetic particles serves as a conversion element, enhancing the deformation of the thin film caused by surface stress under the action of a magnetic field and amplifying the resistance response signal of the nano sensor. The 5-HT detection associated with neurotransmitter diseases serve as a proof of concept revealing the magnetic sensitization. The detection limit of the 5-HT was decreased to 3.21 nM in the linear range of 5–500 nM, which was lower than that of the nano sensor without magnetic field. The clinical 5-HT samples were also been accurately detected, indicating a positive application potential of the as-prepared magnetic-mediated nano sensor. All these results reveal the high sensitivity and practicality of the as-prepared magnetic-mediated nano sensor and provide a new method for neurotransmitter diseases diagnosis.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2018
·
IF 4.521
Jingjie Cao,Mingwei Ma,Jinchan Liu,Yongquan Yang,Hui Liu,Xingliang Xu,Jiahui Huang,Huijuan Yue,Ge Tian,Shouhua Feng
Aluminum ion-exchanged Ca-montmorillonite with different concentrations of aluminum ion were prepared and applied in the conversion of carbohydrates to 5-hydroxymethylfurfural (HMF). It was found that two types of acid sites were present in the catalyst, Lewis acid sites for isomerization of glucose and Brønsted acid sites for dehydration of fructose. With Al-mont-10 as catalyst, the yield of HMF converted from glucose was 80.4% in a biphase system (THF: NaCl solution) at 180 °C for 2.5 h. Further, the catalyst also shows excellent catalytic performance in the conversion of starch and inulin, and the yield of HMF reached 60.1% and 81.6% under identical conditions, respectively.
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高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Zhongwen Dong,Chuanyu Yang,Dongpu Zhao,Yanan Wang,Weifeng Chu,Zhaochi Feng,Xiangxue Zhu,Wenjie Xin,Yongchen Shang,Shenglin Liu,Longya Xu
The interzeolite transformation approach has been used extensively for the quick synthesis of zeolites at a lower cost. Herein, an interzeolite transformation method for the quick synthesis of co-crystalline ZSM-5/ZSM-11 (CDM-5) nanoaggregates has been developed by precisely controlling the synthesis parameters and using 1,6-hexamethylenediamine as an organic structure-directing agent. In contrast, the irregular CDM-5 zeolite block obtained from an amorphous aluminosilicate gel takes a longer crystallization time using the conventional method. Combined with the related results of characterization, UV-Raman spectra show that double 6-membered rings in the parent USY zeolite framework are broken, and an ordered aluminosilicate aggregate species (OAAS) containing 4-membered rings (4Rs) are formed during the interzeolite transformation. HRTEM and SEM images demonstrate that the block OAAS is dissolved into amorphous nanoparticles, followed by converting into CDM-5 nanoaggregates. These results reveal that an OAAS is essential for the synthesis of CDM-5 nanoaggregates via the interzeolite transformation method. In addition, the CDM-5 nanoaggregate catalyst exhibits superior stability and resistance to carbon deposition in the alkylation reaction of benzene with ethanol compared with the irregular block CDM-5 catalyst.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Xiaoxue Li,Xiaopo Niu,Shuaikang Zhu,Shuang Xu,Zheyuan Wang,Xiangwen Zhang,Qingfa Wang
Fabricating zeolite-supported catalysts with excellent catalytic performance for hydroconversion of bio-oils into high-quality fuels is still a great challenge. Herein, hierarchical ZSM-5 zeolites were successfully synthesized with 3-[(trimethoxysilyl) propyl] octadecyldimethylammonium chloride as a mesoporous template. The hierarchical ZSM-5 supported Pt catalysts (Pt/HZ-x) were used to enhance the hydrodeoxygenation of dibenzofuran into bicyclohexane, and the influence of acidity distribution on the reaction pathways was investigated by tailoring the Si/Al molar ratios (50, 75, and 100). For all catalysts, cycloalkanes were produced via the partial hydrogenation of the aromatic rings to generate tetrahydrodibenzofuran, followed by the cleavage of C—O bond. The optimal bicyclohexane selectivity (86.8%) was obtained on Pt/HZ-75 catalyst due to the good synergistic effect between metal dispersion and acid distribution. This catalyst also showed excellent stability because of its strong metal–support interactions. Even after reused five times, the catalytic activity was almost unchanged compared with the fresh one. Furthermore, the possible reaction pathways for conversion of dibenzofuran into bicyclohexane over Pt/HZ-x catalysts were developed.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Dan Yang,Xi nan Yang,Ming Liu,Li xia Chen,Qing Li,Hang Cong,Zhu Tao,Xin Xiao
Organic micropollutants pose a tremendous challenge to global water resources, for nonbiodegradable synthetic chemicals, especially. In this investigation, we loaded Cucurbit [5]uril on polymer BPEIH to prepare supramolecular polymer Q[5]@BPEIH with pore structure , which is used to adsorb and remove organic micropollutants in water. The experimental results show that the adsorbent can remove organic micropollutants from water quickly and with high loading, which is better effect than that of traditional activated carbon. In particular, the polymer is an excellent adsorbent for 2,7-dihydroxynaphthalene and Neutral Red pollutants. It also has classy adsorption properties for 1-naphthylamine, Amaranth, Metallic Yellow, 8-hydroxy-1,3,6-trisulfonic acid pyrene, Methyl Orange and Crystal Violet. This adsorbent can also adsorb I 2 . When the adsorption tends to equilibrium, the calculated adsorption rate is 87.2%. These outstanding adsorption effects show that this adsorbent can help to remove a variety of micropollutants in the process of wastewater treatment . More importantly, Q[5]@BPEIH that we designed and synthesized has the characteristics of low synthesis cost, simple synthesis and preparation process, high product yield, fast adsorption speed and strong removal ability. The admirable removal ability of pollutant proved the prospect of Q [5]@BPEIH for rapid sewage disposal.
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高影响因子
Canadian Journal of Chemistry
·
2024
·Vol. 102
·期 9
·
IF 1.1
Yuanyuan Zhang,Mengyi Ba,Wen Li,Yanli Song,Xiang Xu,Haixin Liu,Wenxuan Zhao,Tao Sun,Zhiqiang Cai
Herein, we synthesized and used a novel pillar[5]arene with two functionalizable rims (AP5A-C10-OAc) as stationary phase in gas chromatography (GC). The AP5A-C10-OAc column (0.25 mm, i.d.) showed a high column efficiency of 4107 plates/m and medium polarity. The AP5A-C10-OAc stationary phase possesses unique amphiphilic structure, including a π-electron rich cavity and two functionalized arms composed of five nonpolar alkyl chains and five polar ester chains, and showed good separation performance for diverse types of analytes and isomers (apolar/polar, aliphatic/aromatic). Particularly, the AP5A-C10-OAc phase showed high selectivity for the challenging isomers of chloronitrobenzenes, bromonitrobenzenes, benzenediols, and iodoanilines with distinct advantages if compared with the commercial polysiloxane column.
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高影响因子
危险品化学品经营许可证（带存储）