EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Yejun Luo,Suqin Deng,Zheng Li,Lijiu Cao,Yuan He,Yufang Chen,Tao Jin
Hydrophobic modified cotton filter fabric is a key material in the chemical industry, as it is used in common industrial filtration and precision separation processes. Most studies have focused on improving the hydrophobicity of cotton filter fabric. However, the hydrophobic durability, which is the most critical factor that determines the application scope of the material, remains unaddressed. Herein, we report that CS 2 activation and subsequent 1-octadecene graft copolymerization via ARGET-ATRP of the cotton filter fabric leads to a modified material that is largely superior to the traditional cotton filter fabric. The modified cotton filter fabric exhibits high hydrophobicity, with an initial water contact angle of 141.0° and excellent hydrophobic durability, as demonstrated by the residual water contact angle of 126.7° after a 150 min droplet holding time. Moreover, the modified hydrophobic sample fabric was resistant to a variety of physical stresses and chemicals, maintaining its hydrophobic properties following multiple resistance tests, such as immersion in oily water for 10 days, immersion in organic solvents for 72 h, or when subjected to UV radiation for 24 h.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Junying Hu,Jingkai Bi,Emmanuel Tuyizere,Zhiwei Men
In the spectroscopic study of polyatomic molecules, Fermi resonance (FR) is a vibrational coupling and energy transfer phenomenon that widely exists intra- and intermolecular. In particular, the FR coupling between the fundamental mode ν 1 and the doubling mode 2ν 2 of the CS 2 molecule has attracted extensive research. In this work, we investigate the effect of local field on tuning the FR of CS 2 . By analyzing the Raman spectra of CS 2 mixed with methanol and ethanol with different mole fractions, the results indicated that weak HBs interactions in binary solutions can be reflected by the linear frequency shift of the C–H bond vibrations (in methanol and ethanol) with different molar concentrations. Furthermore, the geometrical structure was optimized using DFT simulation, and the vibration analysis and interaction energy were carried out. The simulated Raman spectra are in good agreement with the experiments. In addition, high-pressure Raman spectra of CS 2 were obtained by diamond anvil cell technique (up to 9.19 GPa) and a pressure-induced phase transition was observed at 1.71 GPa. The results demonstrated that the pressure-induced polymerization phase transition of CS 2 molecules causes the close packing and more orderly arrangement of molecules, resulting in the enhancement of FR coupling. HB and high pressure tune the FR of the CS 2 molecule differently.
研究领域:
物理化学
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分子光谱学
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计算化学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 41
·期 10
·1563-1576
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IF 4.3
Zhang Jie,Ye Fan,Huo Jin-Lei,Peng Jian-Wen,Hu Rong-Rong,Tang Ben Zhong
Multicomponent polymerizations (MCPs) are powerful tools to synthesize functional polymers with great structural diversity, low cost and high efficiency, which usually generate single polymer product. Herein, a robust one-pot diamines, CS 2 and monoisocyanide-participated catalyst-free polymerization was developed at room temperature to produce polythiourea and thioformamide simultaneously in equal equivalent, which was featured with cheap monomers, simple operation and mild condition, affording various polythioureas with high M w s of up to 47500 g/mol in high yields of up to 98%. Polythioureas with varied chain composition and sequence-controlled structure could be synthesized in 62 g-scale from copolymerization or multicomponent tandem polymerization, enabling facile tuning of thermal property, crystallinity, mechanical property, and fluorescence. The abundant irregular hydrogen bonds endowed the polythioureas excellent glassy state self-healing property at room temperature or below 0 °C. This polymerization provided an efficient and economic approach to access functional polythioureas.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Hong Qian Dai,Yuan Lu,Zhi Hin Ou,Min Xu
Fe3O4-APTES-CS2 was prepared by modification of Fe3O4 with 3-aminopropyltriethoxysilane (APTES) and carbon disulfide (CS2). Lipase was covalently bonded to Fe3O4-APTES-CS2 to obtain the immobilized lipase Fe3O4-APTES-CS2-lipase. The textural characteristic of Fe3O4-APTES-CS2-lipase was assessed by scanning electron microscopy. The optimal immobilization conditions were 2.5 mg/mL lipase, pH 7.0, 35 °C, 3 h. The loading amount of lipase was 119.0 mg/g carrier. The immobilization efficiency reached 57%. (R)-(+)-N-acetyl-1-methyl-3-amphetamine was synthesized by Fe3O4-APTES-CS2-Li- pase. The conversion, enantiomeric excess of (R)-(+)-N-acetyl-1-methyl-3-amphet-a- mine and E value reached 36.8%, 98.5% and 132, respectivel.
研究领域:
化学
·
生物化学
·
材料科学
·
催化
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuyan Zheng,Zinan Li,Meiling Chen,Jiyang Zuo,Tao Yang,Wenhua Miao,Yadong Zhao,Fei Liu,Jinggang Wang,Jin Zhu
The high value-added utilization of cellulose with various functions is a hot topic in the field of bio-based materials. The existing high value-added utilization methods mainly rely on the dissolution and functionalization of cellulose in two steps in a homogeneous system. Herein, a new CS 2 /DBU/DMSO solvent system was successfully designed by combining viscose and CO 2 switchable solvent, and then obtained regenerated product (DCC) with metal ion detection and antibacterial functions through a simple process from dissolution to regeneration. Cellulose dissolves mildly and efficiently in this system. In addition, the metal ion test paper prepared from DCC can quickly respond to Co 2+ , Cu 2+ , and Fe 3+ ions and produce significant visual color changes in a short period of time. Finally, the experiment showed that the DCC film has good antibacterial activity against S. aureus and E. coli . This study lays the foundation for the dissolution, derivation, and processing of cellulose, and provides new ideas for the production of functional materials using cellulose in the future.
研究领域:
生物基材料
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化学工程
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Xiaoqing Yue,Qiang Li,Bin Li,Long Zhao,Yu Wu,Tingyu Yang,Kai Liu,Jianbin Zhang,Ning Zhu
In the past two decades, a large number of organic sulfur compounds such as CS 2 have been released into the atmosphere, which has caused some impacts on the environment. At present, most of the industrial treatment methods of CS 2 have a series of problems, such as high energy consumption, the use of catalysts and additional treatment of by-products, which are not advisable from the economic point of view. Therefore, in this work, a method of efficient and rapid storage of CS 2 by EDAs + EGs ionic liquid systems at room temperature and pressure without catalyst were proposed. At the same time, the change trend of temperature and conductivity of EDAs + EGs systems during CS 2 storage were determined. Secondly, in order to realize the resource utilization of CS 2 SM, the mechanism of EDAs + EGs system storage CS 2 and the properties of CS 2 SM were further studied by NMR, FTIR, XPS , XRD and other modern spectral techniques. The results showed that white precipitate with high melting point (127–224 °C) and high thermal stability were formed after CS 2 is stored in the systems. These white precipitates had a similar chemical structure ([ + H 3 NR 1 NH 3 + − SC(=S)OR 2 (R 3 )O(S = )CS − ] n ), which were named as carbon disulfide storage material (CS 2 SM). Furthermore, CS 2 SMs were used as raw materials to one-step synthesize nano-metal sulfides (MSs) with excellent photocatalytic activity in the reduction of CO 2 . This provides a new method for the rapid storage and utilization of CS 2 , and it also has important practical significance for reducing CS 2 emissions and realizing effective utilization of CS 2 . This efficient, green and universally applicable CS 2 capture method is of great significance to reduce its hazards and obtain valuable chemicals.
研究领域:
环境科学
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材料科学
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化学工程
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催化
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可持续化学
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产品关联
DOI
高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 5
·
IF 2.515
Pingfeng Fu,Gen Li,Xiaoting Wu,Xiaofeng Lin,Bolan Lei
The decomposition of toxic flotation reagents upon UV185+254 nm irradiation was attractive due to operational simplicity and no dosage of oxidants. In this work, the degradation of typical thiol collectors (potassium ethyl xanthate (PEX), sodium diethyl dithiocarbamate (SDD), O-isopropyl-N-ethyl thionocarbamate (IET) and dianilino dithiophoshoric acid (DDA)) was investigated by UV185+254 nm photolysis. The degradation efficiencies and mineralization extents of collectors were assessed. The formation of CS2 and H2S byproducts was studied, and the mechanisms of collector degradation were proposed under UV185+254 nm irradiation. The PEX, SDD and IET were decomposed with nearly 100% removal upon 75 min of UV185+254 nm irradiation. The decomposition rate constants decreased in the order SDD > PEX > IET ≫ DDA, and the DDA was the refractory collector. After 120 min of UV185+254 nm irradiation, 15−45% of carbon and 25−75% of sulfur of collectors were completely mineralized, and the mineralization extent decreased in the order PEX > SDD > IET > DDA. The percentage of gaseous sulfur (CS2 and H2S) ranged from 0.48 to 4.85% for four collectors, showing the fraction of emitted sulfur byproducts was small. The aqueous CS2 concentration increased in the first 10−20 min, and was decreased to a low level of 0.05–0.1 mg l−1 at 120 min. Two mechanisms, i.e. direct UV254 nm photolysis and indirect oxidation with free radicals, were responsible for collector decomposition in the UV185+254 nm photolysis.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2017
·Vol. 19
·期 4
·1102-1108
·
IF 9.125
Chunqing Lou,Ning Zhu,Ronghua Fan,Hailong Hong,Limin Han,Jianbin Zhang,Quanling Suo
A convenient and efficient method for the synthesis of 2-mercaptobenzothiazoles from disulfide and CS2 mediated by a metal sulfide in water is described. This synthetic methodology could be used to prepare diverse 2-mercaptobenzothiazole derivatives in good to excellent yields. In this paper, the concept of metal sulfide–disulfide dynamic interchange reaction was put forward. Then the intermediates of the interchange reaction between NaHS and a disulfide were detected by LC-MS, which demonstrated that the S–S bond of the disulfide could be broken by the metal sulfide through the dynamic interchange reaction. In addition, NaHS was eventually transformed into sulfur S8 by the dynamic interchange reaction. Moreover, the underlying mechanism of 2-mercaptobenzothiazole formation is proposed, in which NaHS not only acts as an S–S bond cleaving agent but also as an activator of CS2. As a result, a novel synthetic route for the preparation of sulfur-containing heterocycles from a disulfide is developed.
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yufan Jiang,Yanfei Zheng,Cangpeng Shan,Ning Hou,Hao Wang,Qinwei Jia,Rui Han,Qingling Liu,Weichao Wang
Catalytic hydrolysis reaction is an effective technology for treating industrial waste gas carbon disulfide (CS 2 ). However, catalyst deactivation caused by passivation of active sites and sulfate-induced sulfur poisoning remains a key obstacle to this technology. Here, a ternary composite system of Ti 0.05 Ce 0.8 La 0.2 O x was successfully constructed. Titanium dioxide (TiO 2 ) was incorporated into the Ce 0.8 La 0.2 O x solid solution through mechanical grinding. The Ti 0.05 Ce 0.8 La 0.2 O x catalyst achieved the complete conversion of CS 2 at 140 °C and maintained stable performance within 320 h of continuous operation, which was significantly superior to the Ce 0.8 La 0.2 O x catalyst and previous reports. The research found that the incorporation of TiO 2 increased the diversity and density of surface hydroxyl groups (-OH), promoting the adsorption and dissociation of CS 2 . Meanwhile, it induced more lattice distortions, significantly increasing the concentration of oxygen vacancies in the catalyst and providing efficient active sites for the dissociation of water molecules (H 2 O). Importantly, the weak acidity of TiO 2 effectively regulates the distribution of basic sites on the catalyst surface, thereby reducing H 2 S adsorption and oxidation side reactions, and simultaneously inhibiting the irreversible accumulation of sulfates/sulfides. Therefore, this study provides valuable insights for the development of industrial-grade long-lasting organic sulfur hydrolysis catalysts.
研究领域:
催化化学
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环境工程
·
材料科学
·
工业催化
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2026
·
IF 3.4
Bo Wang,Jingrui Zhang,Liangyi Gu,Jiahong Li,Jian Wang,Limin Zhang,Yuxiao Wu,Xiaoshuang Li
Lead-free halide perovskites have drawn considerable interest, owing to their low-toxicity and favorable photophysical characteristics. However, achieving efficient near-infrared (NIR) emission often suffers from a trade-off between the red shift and quantum yield. Herein, we report a synergistic host-dopant strategy in zero-dimensional Cs2-xRbxInBr5·H2O perovskites. Controlled Rb+ alloying induces lattice contraction, which unexpectedly weakens electron–phonon coupling and suppresses nonradiative decay, leading to a high photoluminescence quantum yield (PLQY) of 53.2%. Subsequently Mn2+ doping further passivates defect states, boosting the PLQY to 67.5%. Density functional theory calculations and temperature-dependent spectroscopy elucidate the role of the lattice strain in regulating self-trapped exciton emission. A prototype NIR phosphor-converted light-emitting diode (pc-LED) fabricated from the optimized material demonstrates a promising performance in night-vision imaging and plant growth applications. This work provides a viable design strategy for efficient and stable NIR phosphors via a coupled lattice and defect engineering.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Wei Lu,Peng Xiao,Zhenzhong Liu,Jincui Gu,Jiawei Zhang,Youju Huang,Qing Huang,Tao Chen
The detection of highly toxic CS2, which is known as a notorious occupational hazard in various industrial processes, is important from both environmental and public safety perspectives. We describe here a robust type of chemical-reaction-based supramolecular fluorescent nanoprobes for ratiometric determination of CS2 with high selectivity and sensitivity in water medium. The micellar nanoprobes self-assemble from amphiphilic pyrene-modified hyperbranched polyethylenimine (Py-HPEI) polymers with intense pyrene excimer emission. Selective sensing is based on a CS2-specific reaction with hydrophilic amino groups to produce hydrophobic dithiocarbamate moieties, which can strongly quench the pyrene excimer emission via a known photoinduced electron transfer (PET) mechanism. Therefore, the developed micellar nanoprobes are free of the H2S interference problem often encountered in the widely used colorimetric assays and proved to show high selectivity over many potentially competing chemical species. Importantly, the developed approach is capable of CS2 sensing even in complex tap and river water samples. In addition, in view of the modular design principle of these powerful micellar nanoprobes, the sensing strategy used here is expected to be applicable to the development of various sensory systems for other environmentally important guest species.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2103724
·
IF 17.521
Xingwen Cheng,Zhi Xie,Wei Zheng,Renfu Li,Zhonghua Deng,Datao Tu,Xiaoying Shang,Jin Xu,Zhongliang Gong,Xingjun Li,Xueyuan Chen
Fundamental understanding of the effect of doping on the optical properties of 3D double perovskites (DPs) especially the dynamics of self-trapped excitons (STEs) is of vital importance for their optoelectronic applications. Herein, a unique strategy via Cu + doping to achieve efficient STE emission in the alloyed lead-free Cs 2 (Ag/Na)InCl 6 DPs is reported. A small amount (1.0 mol%) of Cu + doping results in boosted STE emission in the crystals, with photoluminescence (PL) quantum yield increasing from 19.0% to 62.6% and excitation band shifting from 310 to 365 nm. Temperature-dependent PL and femtosecond transient absorption spectroscopies reveal that the remarkable PL enhancement originates from the increased radiative recombination rate and density of STEs, as a result of symmetry breakdown of the STE wavefunction at the octahedral Ag + site. These findings provide deep insights into the STE dynamics in Cu + -doped Cs 2 (Ag/Na)InCl 6 , thereby laying a foundation for the future design of new lead-free DPs with efficient STE emission.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）