Surfaces and Interfaces
·
2022
·
IF 6.137
Ling-Ling He,Xiao-Yan Li,Jing-Yi Bai,Song Li,Shuang Qi,Xin Wang,Yu Li
A novel ZnWO 4 /MgWO 4 n-n heterojunction (0.9% ZnWO 4 /MgWO 4 ) was fabricated successfully and characterized by different techniques. The methylene blue (MB) was removed to confirm the sonocatalytic activity by the 0.9% ZnWO 4 /MgWO 4 composite. The sonocatalytic removal ratio of MB using MgWO 4 was 40.04±4.34(%). It was significantly increased to 93.82±3.44(%) in the presence of 0.9% ZnWO 4 /MgWO 4 composite. The significantly improved sonocatalytic performance was due to the form of n-n heterojunction, which could hinder the recombination of electron and hole ( e − - h + ) pairs effectively. The mechanism showed that hydroxyl radical (•OH) and h + had important roles for the elimination of MB. Moreover, the 0.9% ZnWO 4 /MgWO 4 composite had remarkable stability during the process of MB removal under the ultrasonic irradiation. The results suggested that the fabrication of heterojunction is a valid method to promote the sonocatalytic performance of catalyst. The results of this paper would provide valuable references for the development of new sonocatalysts used in environmental remediation.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qian Zhu,Xun Sun,Hong Zhao,Dan Xu,Zhengping Dong
The N, S co-doped carbon nanotube-encapsulated Co nanoparticle (NP) material was prepared by one-pot pyrolysis of cheap precursor materials. As-prepared Co@NSC-800 exhibited excellent catalytic activity in transfer hydrogenation and N-formylation of nitroarenes, and the solvent and hydrogen source were the critical factors affecting the selectivity of aniline and benzamide. Moreover, the synergistic effect between Co NPs and N, S atoms was beneficial to improve the catalytic efficiency of Co@NSC-800; especially, the incorporation of S atoms greatly boosted the selectivity of N-formylation. Despite the use of HCOONH4 (HCOOH) as a hydrogen donor for hydrogenation and formylation of nitroarenes, the special nanotube structure of the Co@NSC-800 catalyst effectively prevented the corrosion of Co NPs and showed excellent durability under harsh reaction conditions. In addition, the catalyst maintained excellent catalytic activity after six cycles and was easily separated using an external magnet. Thus, this study can provide an effective method for the transfer hydrogenation and formylation of nitroarenes.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Yue Sun,Shi-Qi Cheng,Junkai Ma,Fei Zhu,Wei Hong,Haibing Li
N-acetylglucosamine analogues exist in nature as an important saccharide in human body and can regulate a variety of life activities captured through biological nanochannels. Herein we describe a biomimetic strategy via supramolecular host-guest chemistry for constructing artificial nanochannels to detect N-acetylglucosamine analogues. The functional nanochannels exhibited a high selectivity and good reversibility towards N-acetylglucosamine. Further studies indicate that the detecting behaviors was probably due to the multiple hydrogen bonding interactions and an appropriately fitting the functional and geometric requirements between the tryptophan-decorated pillararenes and N-acetylglucosamine, leading to the change of the surface charge and wettability within the nanochannels. These studies can give interesting insight for the research of biological processes caused by N-acetylglucosamine-sensitive ion channels, and also help to develop the platform for detecting N-acetylglucosamine in vitro.
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JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 49
·期 9
·3391-3399
·
IF 2.305
Jie Zhiqiang,Zhang Bing,Zhao Lianhong,Yan Xiufang,Liang Jie
A novel regenerable antimicrobial silica gel was prepared by a dehydration between silanols of silica gel and hydrolyzed 3-chloropropyltrimethoxysilane, a quaternization between grafted hydrolyzed 3-chloropropyltrimethoxysilane and (5,5-dimethylhydantoinyl-3-ylethyl)-dimethylamine (DHEDA), and a chlorination of amide groups of DHEDA. The as-prepared antimicrobial silica gel was characterized by FT-IR and X-ray photoelectron spectroscopy. Antimicrobial tests showed that the as-prepared antimicrobial silica gel was capable of about a 6-log inactivation of Staphylococcus aureus and Escherichia coli O157:H7 within 10 min of contact. Interestingly, more than 2 × 10 4 CFU/mL of Escherichia coli O157:H7 could be almost inactivated under flowing water condition. Furthermore, the as-prepared antimicrobial silica gel exhibits good regenerability and storage stability.
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ANALYTICAL CHEMISTRY
·
2014
·
IF 5.825
Jing Li,Laizhong Chen,Wenxiao Wu,Wei Zhang,Zhao Ma,Yanna Cheng,Lupei Du,Minyong Li
To find an approach that can image the hydrolysis activity of aminopeptidase N (APN) both in vitro and in vivo, three bioluminescent probes have been well designed and synthesized herein. All of them can be recognized and hydrolyzed by APN to produce bioluminescence emission in the presence of firefly luciferase. To the best of our knowledge, they are the first bioluminescent probes for imaging APN in deep tissues and living animals.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Pan Liu,Xiangyu Li,Long Cheng,Xuqiang Zhu,Yanchun Li,Dongming Song
A new type of nanothermite composed of n-Al (metal fuel) and FeF 3 (oxidizer) was investigated in this paper. The thermal behavior and combustion properties of the n-Al/FeF 3 nanothermite were compared with that of n-Al/Fe 2 O 3 nanothermite by TG/DSC-MS, XRD, SEM and high-speed camera. The results showed that the decomposition of FeF 3 begins at 300 °C and releases free F ions. The F ions react with Al 2 O 3 shell covered on the surface of aluminum. The start and exothermic peak temperatures of the major reaction of n-Al/FeF 3 are at 415 °C and 520 °C respectively, which are 95 °C and 34 °C lower than those of n-Al/Fe 2 O 3 . Furthermore, the FeF 3 will be reduced to Fe completely at 700 °C. However, the Fe 2 O 3 could only be converted to Fe 3 O 4 . It demonstrates that the reaction of n-Al/FeF 3 is completely, but only a part of n-Al/Fe 2 O 3 reacts at 700 °C. The n-Al/FeF 3 has larger, brighter flame and shorter burning time than n-Al/Fe 2 O 3 in open air.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Junjie Zhang,Yansheng Wu,Li Zhang,Wenran Gao
Nitrogen-doped graphene has been regarded as one of the most promising materials for nonradical peroxymonosulfate (PMS) activation. However, facile construction of nitrogen-doped graphene and systematic investigation of its nonradical PMS activation in a practical environment still far lag behind. Herein, graphitic N-rich graphene was prepared by one-step pyrolysis of urea. The obtained urea-derived graphitic N-rich graphene (UGNG) possessed a high N content of 12.12 at. % and a graphitic N proportion of 41.12%, giving a high graphitic N content of 4.98 at. %. We confirmed that PMS donated electrons to the graphitic N in UGNG, resulting in the cleavage of PMS to singlet oxygen for nonradical oxidation. The turnover frequency for the oxidation reached the highest value of 10.5 min–1. Also, the reaction could be conducted in a wide temperature (5–45 °C) range, even with the existence of common matrix species and different natural water matrixes. This work presented the direct conversion of N-rich organic urea to UGNG and systematically investigated its nonradical PMS activation, which is believed to be helpful to its further practical use.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Xuan Yue,Xiying Fu,Feibo Li,Aifeng Liu
Polymer particles with precisely controlled shapes and internal architectures have garnered significant attention owing to their unique physical properties and diverse potential applications. In this study, we present a systematic investigation of the morphological evolution of polystyrene-block-poly(4-vinyl pyridine) (PS-b-P4VP) assemblies under three-dimensional (3D) confinement, induced by n-butanol through hydrogen bonding interactions with 4VP units. The selective localization of n-butanol within the P4VP domains leads to an expansion of its volume fraction and a substantial alteration in the hydrophilicity of the P4VP block. Consequently, these PS-b-P4VP self-assemble into particles with onion-like structure or spherical internal structure. Notably, the synergistic co-assembly of gold nanoparticles (AuNPs) with PS-b-P4VP yields core–shell-corona hybrid spheres and hybrid onion-like nanoparticles, which exhibit remarkable potential for applications in advanced sensing technologies, heterogeneous catalysis, and targeted drug delivery systems.
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PubMed
高影响因子
CATALYSIS LETTERS
·
2012
·Vol. 142
·期 3
·378-383
·
IF 2.242
Zhang Rui,Huang Lei,Zhang Yanfang,Chen Xiaorong,Xing Weihong,Huang Jun
A heterogeneous silver catalyst was prepared and applied efficiently for the selective bromination of aromatics with NBS. The silver nanoparticles combined with the acidic support HMB can activate both the aromatic ring and NBS, and the synergistic effects between the silver nanoparticles and the HMB highly enhanced the efficiency of the bromination reaction. Graphical
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Scientific Reports
·
2019
·Vol. 9
·期 1
·1-8
·
IF 4.011
Xu Airong,Wang Yongxin,Liu Rukuan
The utilization of cellulose in industrial applicat is of great significance to sustainable development of human society and reducing dependence on dwindling fossil resources. Nevertheless, this utilization of cellulose has actually been limited due to its insolubilization. Here, novel solvents consisting of diallylimidazolium methoxy acetate ([A 2 im][CH 3 OCH 2 COO]) and N- methylpyrrolidinone (NMP) were developed. The solubility of cellulose in [A 2 im][CH 3 OCH 2 COO]/NMP was determined, and the influence of [A 2 im][CH 3 OCH 2 COO]/NMP molar ratio on cellulose dissolution was systematically investigated. Meanwhile, we also presented the affecting factors of the cellulose material fabrication including preparation approach, [A 2 im][CH 3 OCH 2 COO] and cellulose solution concentration. Attractively, the [A 2 im][CH 3 OCH 2 COO]/NMP solvents display much powerful dissolution capacity for cellulose even at 25 °C (25.4 g 100 g −1 ). This is mainly ascribed to the combined factors: The hydrogen bond interactions of the H2, H4 and H6 in [A 2 im] + and carboxyl O atom in [CH 3 OCH 2 COO] − with the hydroxyl H atom and O atom in cellulose; the dissociation of NMP towards [A 2 im][CH 3 OCH 2 COO]; the stabilization of NMP towards the dissolved cellulose chains. In addition, the thermostability and chemical structure of the regenerated cellulose from the solvents was also estimated.
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PubMed
高影响因子
GLYCOCONJUGATE JOURNAL
·
2018
·Vol. 35
·期 4
·411-420
·
IF 2.548
Wang Chengjian,Yang Meifang,Gao Xi,Li Cheng,Zou Zihua,Han Jianli,Huang Linjuan,Wang Zhongfu
Despite the great significance of release and analysis of glycans from glycoproteins, the existing N -glycan release methods are undermined by some limitations and deficiencies. The traditional enzymatic protocols feature high N -glycan release specificity but are generally costly and inefficient for some types of N -glycans. The existing chemical methods require harsh reaction conditions or are accompanied by the remarkable formation of by-products. Herein, we describe a versatile chemical method for the release and analysis of N -glycans from glycoproteins. This method differs from the existing methods as only aqueous ammonia is used to catalyze the N -glycan release reactions. Optimization of reaction conditions was performed using RNase B as a model glycoprotein and the obtained results indicated a highest N -glycan yield in ammonia at 60 °C for 16 h. Comparison of this method with traditional enzymatic protocols and recently reported NaClO methods confirmed the good reliability and efficiency of the novel approach. We also successfully applied this method to some complex biological samples, such as Ginkgo seed protein, fetal bovine serum (FBS) and hen egg white, and demonstrated its great compatibility with various neutral N -glycans, core α-1,3-fucosylated N -glycans and sialylated N -glycans. This method is very simple and cost-effective, enabling convenient analysis and large-scale preparation of released reducing N- glycans from various biological samples for structural and functional glycomics studies.
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PubMed
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 10
·e4483
·
IF 3.581
Xufeng Wu,Lingyu Li,Wenlong Jiang,Lihong Zhou,Qingle Zeng
Tosylhydrazones are a kind of labile and highly reactive compounds, which are apt to be transformed into reactive diazo compounds and then into extremely reactive carbenes under the basic condition. In order to fulfil the valuable C-N coupling reaction, diaryliodonium salts are evaluated and prove to be a class of efficient electrophiles. The reaction with ligand-free copper salt as catalyst shows a wide range of substrate scope. A plausible mechanism is proposed.
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危险品化学品经营许可证（带存储）