CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Minghui Sun,Muthu Murugananthan,Zhiming Zhou,Yan Shen,Yanrong Zhang,Xiaoguang Wang
Great efforts have been made for H 2 O 2 production by an artificial photosynthetic approach. However, the poor solubility of oxygen in the liquid phase, sluggish mass transfer, and additional concentration step to produce H 2 O 2 have limited the development of this technology. Herein, a unique fluorocarbon/hydrophobic photocatalysts/water system is reported, which ensures an efficient photosynthesis and spontaneous self-separation of H 2 O 2. The presence of an ultra-thin dense gas layer between the perfluorous solvent and the photocatalysts enables rapid oxygen supply through a nano-confinement effect. Thus, a maximum photosynthetic efficiency of 4.9 mM g −1 h −1 of H 2 O 2 is achieved, 6 times higher compared to its counterpart gas–liquid-solid triphase system. Importantly, the independent hierarchical structure of the present system, allows functional applications, such as the Fenton reaction using pre-added Fe 2+ in the aqueous solution. This feature makes the fluorocarbon/water systems is an advantageous one and of extraordinary significance for similar types of gas–liquid reactions.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2024
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IF 5.7
Qin Tang,Lingyue Wang,Yang Liu,Yuye Zhang,Deyang Ji,Hongbo Li
The size and morphology of organic single crystals play an important role in their physical properties and device performance, and are mainly driven by the self-assembly process via solvent engineering. Here, a facile solution processing method with self-separation is employed to fabricate two types of fullerene nanorods directly in solution. The as-obtained nanorods suspended in solution demonstrate smaller diameters and longer length (average diameter ∼230 nm and lengths ranging from tens of microns to a few millimeters), while the nanorods that settle at the bottom of the solution demonstrate an average diameter of 980 nm and average length of 14.9 μm. The different sizes of the nanorods may be caused by the different growth direction of the fullerene C60 crystals in the solution and the intercalation of solvent molecules in the crystalline structures. Both of these 1D nanocrystals demonstrate good photoresponse under 365-nm illumination, indicating their potential applications in optoelectronics. The results suggest that desirable solvent engineering provides a novel strategy for the rational design of new carbon-based crystalline nanomaterials.
研究领域:
材料科学
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有机电子学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Lin Wang,Lijun Wang,Jiming Wu,Lei Wang,Weiwei Cong,Xiao Wang,Rong Hu,Weili Li,Mike Tebyetekerwa,Ben Zhong Tang
Self-stratifying coatings are excellent replacements for traditional coatings, which need primers and sealers during their application on substrates. In this work, we introduced aggregation-induced emission (AIE) luminogens (AIEgens) during the synthesis of self-stratifying coating to study and trace the mechanism and reactions between the individual components of the coating resin, its film-forming properties, and response to the environment in real time. The AIEgens introduced into the coating materials were a backbone to these studies. They can emit light (under excitation) with different properties depending on how their molecular rotors are restricted or free to move. More still, the reported fluorescent AIE-based self-stratifying coatings demonstrated reliable hydrophobicity and self-cleaning properties (contact angle above 130°), good thermal tolerance (above 350°), excellent toughness, chemical, and corrosion resistance . Such coatings can find use in various home and industrial applications.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
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2019
·Vol. 33
·期 10
·e5145
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IF 3.259
Zhiguo Lv,Shuying Zhang,Zhenmei Guo,Xi Cheng,Jiaomei Wang,Chao Zhang
The synthesis of alcohol ester 12 is one of the valuable industrial processes, but it was impeded by poor separating property and recycling ability of the catalytic systems. Herein, four novel DBU-based basic ionic liquids (DBILs) of [BDBU]IM, [BDBU]OH, [ODBU]IM, [[ODBU]OH were synthesized successfully by introducing the alkyl chains of 1-bromobutane or 1-bromooctane to 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU), and then, employing imidazole (IM − ) or hydroxide (OH − ) as counter ions. The above obtained four ionic liquids were applied in the synthesis of alcohol ester 12 in isobutyraldehyde (IBD)/aqueous media for the first time. Interestingly, after reaction, production of alcohol ester 12 can be self-separated from ionic liquids/water (ILs/W) catalytic system automatically. Furthermore, the self-separated ILs/W can be recycled and used in next catalytic reaction for at least 5 times without obvious loss of catalytic performance. In this work, the structure, purity, thermal stability and alkalinity of DBILs were characterized systematically. [BDBU]IM shows high alkalinity and thus enhances yield of 66.17%. From thermo gravimetric analyzer (TGA), [BDBU]IM also exhibits excellent thermal stability. So [BDBU]IM was chosen for the further studying. Furthermore, quantum chemistry is applied to calculate the interaction forces and electron energies of reactants by DFT, and the calculation results illustrate the feasibility of synthetic process of DBILs. The self-separation strategy of DBILS in this work may open up a new avenue for the clean synthesis of other industrial products.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Chundong Liu,Maosen Yang,Jing Yu,Fengcai Lei,Yisheng Wei,Qianqian Peng,Chonghui Li,Zhen Li,Chao Zhang,Baoyuan Man
Surface-enhanced Raman spectroscopy (SERS) is widely used in chemical analysis, with very promising application prospects in daily life. However, there are still lots of problems in actual operation, for instance, pollutant detection from sewage, in which the analyte is often dispersed in nonhomogeneous solutions, leading to inaccurate Raman signal collection. Adjusting surface wettability to realize selective self-separation of multiphase liquids in situ on SERS substrate is an effective and challenging approach. In this work, a complex of CuO@Ag nanowires on Cu mesh modified by different wettability, converting from hydrophilic to hydrophobic by simple infrared illumination, is prepared as a multifunctional SERS substrate. Benefitting from the controllable wettability of the substrate, the multiphase solution can be self-separated and adsorbed at the two opposite terminals of it, and the 10 −9 M of malachite green and 10 −5 M of thiram used as two kinds of probe molecules can be separately detected at these two terminals. In addition, after fully hydrophobic modification, the substrate can be also used to extract the organic phase in the ‘water/oil’ mixture and perform in situ detection of the probe molecules in the ‘oil’.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
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2024
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IF 4.9
Wang Jihong,Zhang Min,Yang Yunchu,Dai Gaole,Pan Qiubo,Kong Yuan,Zhou Bo,Dong Haolu,Qu Yixiao,Ma Zhengyuan,Fang Haiping,He Hui,Liu Zheng,Wang Jun,Chen Ruoyang
The contamination of multi-pollutants in source water, e.g., bacterial and organic pollutants, has been a long-term problem that influences our daily lives and industries. Despite great efforts in developing rapid detection methods, most of them require extra operations for pollutant separation and/or analyte purification prior to detection, which are very complicated and can easily cause secondary pollution. Here we report a one-step and effective detection method for multi-pollutants in water, by fabricating a cellulose-based platform through the in-situ growth of gold nanoparticles. Our experiments show that it allows the self-separation of bacterial and organic pollutants or multi-molecules in different sizes, e.g., human serum albumin/phenol mixtures and carbaryl/dimercaptosuccinic acid mixtures, and meanwhile, has the effective surface-enhanced Raman scattering (SERS) activity for separated pollutants/molecules. We further demonstrate that the SERS activity has a positive relation with the analyte concentration and ensures a very low limit of detection (down to 10 −12 M). We note that this detection platform excludes extra operations for pollutant separation and analyte purification, and thus promises a wide range of application fields, e.g., water research, food sanitation, and environmental engineering.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Jiawei Ruan,Lifang Chen,Xinzi Wu,Shaokang Qian,Kunchi Xie,Xiaoyi Zhang,Hongye Cheng,Zhen Song,Zhiwen Qi
Direct synthesis of dimethyl carbonate (DMC) from CO 2 is promising for CO 2 utilization, however its efficiency remains far from industrial-scale implementation for lack of customized catalysts. Herein, a hydroxyl-functionalized ionic liquid (HFIL) was developed to enhance catalytic activity, and importantly, to facilitate IL recovery through spontaneous phase separation. A high DMC yield (6.5 g DMC ·kg cat −1 ·h −1 ) over HFIL was achieved under mild conditions compared to non- hydroxyl IL. Self-diffusion coefficients characterization revealed intensified diffusion of CH 3 OH and HFIL, alongside reduced blockage of active sites after hydroxyl functionalization. Density functional theory calculations elucidated that cation polarization induced by hydroxyl group facilitated the synergistic activation of both substrates and monomethyl carbonate intermediate. The reaction mechanism was further verified through diffuse reflectance infrared Fourier transform spectroscopy and theoretical calculations. The self-separation behavior was demonstrated by molecular dynamics simulations. The deep insights into hydroxyl effects towards direct DMC synthesis provide a pioneering perspective for CO 2 capture and utilization using functionalized ILs.
研究领域:
化学工程
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催化科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2017
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IF 2.813
Yongle Chen,Shiya Ding,Wentao Zheng,Yiyang Zhang,Youting Wu,Xingbang Hu
Special proton-gradient-transfer acid complexes (PGTACs) in which the bonded protons are not equivalent and have gradients in transfer ability, acidity, and reactivity were reported. The acidity gradient of the protons gave the PGTACs excellent catalytic activity and selectivity in the esterification of terpenols. These PGTACs are “reaction-induced self-separation catalysts” and can be easily reused. The kinetics with PGTACs as catalyst in the esterification of geraniol were also studied for use in engineering design.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
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2023
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IF 5.6
Changou Pan,Peng Liu
Palygorskite (Pal) had been widely investigated as adsorbent, owing to its plentiful tunnels in crystals and channels on surface. But the two main challenges restricted its practical application: inconvenient separation and reuse. Here, Pal-based self-separable nano-adsorbent was developed via the surface olefin cross-metathesis (OCM) of nitrile butadiene rubber (NBR) from the methacryloxypropyl-modified Pal nanorods (M-Pal). The P-Pal microgels as small covalent aggregates with higher Pal content, could be easily dispersed into water, and interestingly, settled down completely within 6 min after adsorption of methylene blue (MB) with capacity of 33.0 mg g −1 , slightly higher than the pristine Pal nanorods . The adsorbed MB could be completely desorbed by twenty times of desorption with 1.0 M HCl/ethanol. However, the desorption in repeated use was controlled by the adsorption/desorption equilibrium of MB in the tunnels of Pal nanorods , maintaining adsorption capacity of about 3.0 mg g −1 and 4.6 mg g −1 for reuse with ethanol or 1.0 M HCl/ethanol as eluent.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）