Nature Communications
·
2026
·
IF 18.1
Liu Zheyang,Mao Liang,Liu Yifan,Nie Kaiqi,Zhou Min,Yan Binhang,Jiang Zhifeng,Shi Weidong,Liu Bin
Photocatalytic CO 2 -to-ethanol conversion offers an interesting route for intermittent solar energy utilization. However, the performance is impeded by slow mass-transfer and high dimerization barrier (>1.0 eV) of *CO intermediates, coupled with a kinetic mismatch between the short-lived carriers and the 12 e⁻ reaction. Herein, we develop a Z-scheme Cu δ+ O/floral-like BN photocatalyst that achieves CO 2 -to-ethanol conversion with near 100% selectivity. The photocatalyst utilizes the three-dimensional structure and alkaline surface of BN to concentrate CO 2 and directs transfer of long-lived carriers to unsaturated Cu⁺ sites, stabilizing them for flexible electron donation to the π* orbital of CO 2 . Enhanced ethanol photosynthesis activity/selectivity stems from a new pathway: CO 2 is first reduced to HCOOH at Cu δ+ O sites, lowering the C–C coupling barrier to 0.44 eV. Liquid formate is then concentrated and protonated to C 2 precursor, minimizing side reactions for high selectivity. Here, we show the feasibility of selective ethanol photosynthesis and uncovers a new formate intermediate pathway.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2019
·Vol. 80
·期 5
·950-960
·
IF 1.624
Zhang Caiduan,Liu Feng,Wang Fengjia,Li Haotian,Zeng Fang,Ma Yongliang,Wang Lidong
In order to achieve efficient recovery of ions from the simultaneous desulfurization and denitrification wastewater, the effects of various factors (i.e. the saturation temperature, the cooling termination temperature, the stirring rate and the cooling rate) on crystallization yield, metastable zone width and crystal morphology were investigated to determine the optimal crystallization conditions of Mg 2+ //SO 4 2− , NO 3 – -H 2 O system. According to the results of experiments, the nucleation kinetics were also speculated by Nývlt self-consistent equation and classical 3D nucleation theory. Also, the crystallization products were characterized by X-ray diffraction and scanning electron microscopy. Under the determined optimal conditions, the yield of the crystal can reach 78%, and the crystal products were verified as pure MgSO 4 · 7H 2 O, whose morphology is complete without defects.
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IONICS
·
2022
·Vol. 28
·期 11
·5243-5250
·
IF 2.961
Liu Min,Zhang Qiang,Gao Jianxin,Liu Qianfeng,Wang Erdong,Wang Zhenbo
Mg-air battery is a promising electrochemical system for high-energy–density, long storage application. However, its commercialization is hindered by the low anode utilization rate mainly caused by the serious hydrogen evolution reaction (HER) in traditional NaCl aqueous electrolyte. Herein, we report NaBF 4 -dimethyl sulfoxide (DMSO)/NaCl-H 2 O biphasic electrolytes to alleviate the anode HER corrosion by allowing anodic reaction to take place in organic solution DMSO while ensuring high cathode activity with applying cathode reaction to occur in NaCl-H 2 O solution. The discharge results show that its utilization rate of AZ61 alloy in NaBF 4 -DMSO/NaCl-H 2 O biphasic electrolytes is increased to 67% at 1 mA cm −2 which is 17% higher than in NaCl-H 2 O single electrolyte, and the anode energy density is up to 2020 Wh kg −1 . In addition, even at 15 mA cm −2 , its discharge voltage is still up to 1.02 V which is higher than that in similar literatures using organic electrolytes for Mg anode.
研究领域:
电化学
·
材料科学
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Zhong Yuan,Wang Xue,Huang Zhou,Wei Yao,Tang Qing,Gu Songqi,Li Tingting,Dong Weinan,Jiang Feng,Zhu Haifeng,Shi Yujia,Zhou Zhi,Zhang Yu,Bai Xue,Wu Zhennan
The modulation of traps has found attractive attention to optimize the performance of luminescent materials, while the understanding of trap-involved photoluminescence management of metal nanoclusters greatly lags behind, thus extensively impeding their increasing acceptance as the promising chromophores. Here, we report an efficient passivation of the structural oxygen vacancies in AuAg nanoclusters by leveraging the H 2 O molecules, achieving a sensitive color tuning from 536 to 480 nm and remarkably boosting photoluminescence quantum yield from 5.3% (trap-state emission) to 91.6% (native-state emission). In detail, favored electron transfer relevant to the structural oxygen vacancies of AuAg nanoclusters contributes to the weak trap-state emission, which is capable of being restrained by the H 2 O molecules by taking Au-O and Ag-O bonds. This scenario allows the dominated native-state emission with a faster radiative rate. In parallel, the H 2 O molecules can rigidify the landscape of AuAg nanoclusters leveraging on the hydrogen bonding, thus enabling an efficient suppression of electron-optical phonon coupling with a decelerated non-radiative rate. The presented study deepens the understanding of tailoring the photoluminescence properties of metal nanoclusters by manipulating surface trap chemistry and electron relaxation dynamics, which would shed new light on luminescent metal nanoclusters with customizable performance.
研究领域:
材料科学
·
光学
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JOURNAL OF CHEMICAL RESEARCH
·
2023
·
IF 1.4
Mei Wang,Shenghu Yan,Yue Zhang,Shunlin Gu
A new continuous flow synthetic method for preparing indole and its derivatives are successfully developed to overcome the disadvantages of traditional batch methods, such as low conversion rates, long reaction times, and amplification effects. The method represents a sustainable and efficient preparation of indole and its derivatives without the need for additional catalysts. By investigating the effects of the reaction temperature, the solvent, the equivalence ratio, and the residence time, high conversion rates and excellent yields were simultaneously achieved within 20 min under optimized conditions. For the template reaction, DMSO/H2O/AcOH = 2:1:1 is used as the solvent, the reaction temperature is 110 °C, and the ratio of phenylhydrazine hydrochloride to cyclopentanone is 1:1.05. Indole and a wide array of its derivatives are synthesized to verify the universality of the method, and most of the reactions exhibit satisfactory conversion rates and high yields are obtained. This new continuous flow method is more suitable for industrial scale-up relative to traditional batch methods.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chao Song,Tong Wang,Xiaohuan Sun,Yimin Hu,Lei Fan,Rong Guo
The lamellar liquid crystal (LLCS) system constructed by surfactant aggregation was demonstrated to exhibit superior tribological properties due to its unique lamellar structure and creep recovery properties. However, the lubrication performance of this kind of liquid crystal system was greatly hindered by its soft nature. Emerging as two-dimensional material, MXene has been promising candidate in tribology on account of its unique layer structure and versatile composition . Taking account of the above fact, herein, nonionic surfactant polyoxyethylene lauryl ether (Brij30), MXene (Ti 3 C 2 T x ), and H 2 O were employed to construct a triple-component composite LLCS system and the related tribological properties were systematically investigated. The results demonstrated that the lubrication performance of the liquid crystal system formed in the presence of Ti 3 C 2 T x was significantly improved compared with that of Brij30/H 2 O LLCS. The average friction coefficient of the composite LLCS system was in the range of 0.1155–0.1266, and the best lubrication performance was achieved when the Ti 3 C 2 T x content was kept as 6 mg/mL. MXene is also able to achieve good dispersion in liquid crystal systems. The enhanced lubrication performance of the composite LLCS system was mainly due to the synergistic effect of MXene nanosheets and LLCS. In addition, the iron oxides generated by the reaction during the friction process also promote lubrication. It is believed that the current work provides an alternative method for the development of MXene/LLCS-lubricating materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xia Hongbo,Li Dan,Wu Suli,Feng Shuai,Meng Chao,Dong Bin
Responsive photonic crystals have attracted much attention due to their strong capability to manipulate the propagation of light in the visible region, but it is still a big challenge to invisibility and mechanical stability. Here, the novel Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals, which have high mechanical stability and can release visible patterns after wetting with water, are discussed. The Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals are also responsive to the concentration of ethanol, and the structural color response times increase with increasing ethanol concentration. This design uses the selective infiltration, hydrogen bonding and capillary action of solvent to realize the spectral diversity of reflectance. Owing to the high polarity and hydrogen bonding ability of carboxyl groups, water molecules are adsorbed easily by the poly(acrylic acid) gel. Subsequently, the encrypted information is decrypted due to the redshift of the structural color. Because of its lower polarity and hydrogen bonding ability relative to water, ethanol can impede the absorption of solvent by gel. Therefore, the ethanol concentration can be identified based on the structural color response time. Furthermore, reliable information decryption methods make Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals potentially uesful as trusted encryption devices.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Caidi Jin,Ning Xiang,Xiao Zhu,Shuang E,Kuichuan Sheng,Ximing Zhang
5-hydroxymethylfurfural (HMF) can be widely converted into value-added chemicals and fuels production. Herein, we reported a sustainable and efficient approach for synthesizing HMF directly from cellulose. Facile formylation of cellulose with green and recyclable formic acid was developed for cellulose formate (CF) production. CF with special net-like structure and high degree of formyl substitution was prepared. The resultant CF exhibited excellent catalytic conversion and selectivity for HMF production comparable to monomeric glucose as reactant in dimethyl sulfoxide (DMSO)-H 2 O media. In our work, we presented molecular dynamics simulations to elaborate the preferential coordination of DMSO around formyl group, which promoted the solvation of formylated substrate in DMSO-H 2 O mixture, and the HMF yielded could be protected by DMSO without further degradation to levulinic acid or humins.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 16
·e55253
·
IF 2.7
Xiaocan Zhang,Siqin Zeng,Jiashu Long,Xuesong Li,Yutong Zhao
Using porous materials to selectively adsorb H 2 O from natural gas is a promising method to dehydrate methane (CH 4 ). The structure of a Zirconium metal-organic framework (Zr-MOF), namely, MIP-202, features a high density of amino groups, which can produce strong hydrogen bonding with H 2 O molecules. MIP-202 is cost-effective, green and scalable, and it exhibits good chemical stability under various conditions. This work incorporated MIP-202 nanoparticles into the high permeability polymer polyetherimide (PEI), and the obtained Mixed Matrix Membranes (MMMs) was used for the gas separation of H 2 O/CH 4 . It is found that MMMs loaded with 20 wt% of MIP-202 demonstrated a high H 2 O/CH 4 selectivity of 832.2, which was about 760 times of that of the pure PEI. This approach offers a new route to fabricate functional membranes for energy-efficient gas separations.
研究领域:
材料科学
·
环境工程
·
化学工程
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ENVIRONMENTAL TECHNOLOGY
·
2014
·
IF 1.197
Rui-tang Guo,Wen-long Zhen,Wei-guo Pan,Jie-nan Hong,Qiang Jin,Cheng-gang Ding,Shi-yi Guo
CeO2–CuO/Al2O3 catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3 were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol–gel (SG) method showed the best SCR activity and resistance to SO2 and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer–Emmett–Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2–CuO/Al2O3 catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3 adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption.
研究领域:
环境科学
·
催化材料科学
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Journal of Environmental Sciences
·
2020
·
IF 4.302
Yanke Yu,Jiali Zhang,Changwei Chen,Chi He,Jifa Miao,Huirong Li,Jinsheng Chen
CuSO 4 /TiO 2 catalysts with high catalytic activity and excellent resistant to SO 2 and H 2 O, were thought to be promising catalysts used in Selective catalytic reduction of nitrogen oxides by NH 3 . The performance of catalysts is largely affected by calcination temperature. Here, effects of calcination temperature on physicochemical property and catalytic activity of CuSO 4 /TiO 2 catalysts were investigated in depth. Catalyst samples calcined at different temperatures were prepared first and then physicochemical properties of the catalyst were characterized by N 2 adsorption-desorption, X-ray diffraction, thermogravimetric analysis , Raman spectra , Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption of NH 3 , temperature-programmed reduction of H 2 and in situ diffuse reflectance infrared Fourier transform spectroscopy . Results revealed that high calcination temperature had three main effects on the catalyst. First, sintering and anatase transform into rutile with increase of calcination temperature, causing a decrement of specific surface area. Second, decomposition of CuSO 4 under higher calcination temperature, resulting in disappears of Brønsted acid sites (S–OH), which had an adverse effect on surface acidity. Third, CuO from the decomposition of CuSO 4 changed surface reducibility of the catalyst and favored the process of NH 3 oxidation to nitrogen oxides (NO x ). Thus, catalytic activity of the catalyst calcined under high temperatures (≥600°C) decreased largely.
研究领域:
催化
·
环境化学
·
材料科学
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Zhan-Ping Qiao,Xin Chen,Qi-Chao Yang
Using an isothermal equilibrium method, the phase equilibrium of the ternary systems CsCl–CdCl 2 –H 2 O and CsBr–CdBr 2 –H 2 O were studied at T = 298.1 K. In the phase diagram of the system CsCl–CdCl 2 –H 2 O, the solid phases of CsCdCl 3 and Cs 2 CdCl 4 , besides CsCl and CdCl 2 ·2.5H 2 O, were discovered. The phase diagram of the system CsBr–CdBr 2 –H 2 O contains five crystallization fields for the solid phases CdBr 2 ·4H 2 O, CsCdBr 3 , Cs 5 Cd 2 Br 9 , Cs 3 CdBr 5 and CsBr. The new solid phases of CsCdCl 3 and CsCdBr 3 are congruently soluble, and Cs 2 CdCl 4 , Cs 5 Cd 2 Br 9 and Cs 3 CdBr 5 are incongruently soluble in the aqueous system. The experimental solubility data and phase diagram s for the ternary systems show more practical application for the obtained cadmium-based halide perovskite. The five new solid phase have been analyzed by X-ray diffraction and thermogravimetry/derivative thermogravimetry. By measuring the standard molar enthalpies of solution of the compounds, the standard molar enthalpies of formation of CsCdCl 3 , Cs 2 CdCl 4 , CsCdBr 3 , Cs 5 Cd 2 Br 9 , Cs 3 CdBr 5 were determined to be –(873.3 ± 0.7) kJ·mol −1 , –(1325.6 ± 0.9) kJ·mol −1 , –(742.8 ± 0.7) kJ·mol −1 , –(2710.0 ± 1.3) kJ·mol −1 and –(1558.1 ± 1.0) kJ·mol −1 , respectively.
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