ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Mengfei Zhu,Yuepeng Pang,Fuqiang Lu,Xinxin Shi,Junhe Yang,Shiyou Zheng
Li–B–H complexes facilely prepared via partial dehydrogenation of LiBH4 are presented in this study as solid electrolytes for Li batteries. An exceptionally high Li-ion conductivity is found for the Li–B–H complex with 7.5 wt % H2 desorption under 3 bar H2 pressure, which reaches 2.7 × 10–4 S cm–1 at 35 °C, more than 4 orders higher than that of LiBH4. In-depth characterizations show that LiH and [Li2B12H11+1/n]n are in situ formed in the LiBH4 matrix and the interface layer between [Li2B12H11+1/n]n and LiBH4 is believed to be responsible for the high Li-ion conductivity. Moreover, this Li–B–H complex also exhibits excellent electrochemical stability, which enables the stable cycling of all-solid-state batteries at room temperature.
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ChemSusChem
·
2015
·Vol. 8
·期 12
·2066-2072
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IF 7.657
Yehong Wang,Jian Zhang,Jing Liu,Chaofeng Zhang,Zhixin Zhang,Jie Xu,Shutao Xu,Fangjun Wang,Feng Wang
Graphical CO 2 -mediated reactions: CO 2 -mediated metathesis reactions between amines and DMF to synthesize formamides are described. The N -formylation of amines to formamides is achieved by activating amines, not DMF, via a C N and N H bond metathesis reaction. Using this method, primary, secondary, aromatic, and heterocyclic amines as well as diamines can be obtained with good to excellent formamide yields. Herein, we report CO 2 -mediated metathesis reactions between amines and DMF to synthesize formamides. More than 20 amines, including primary, secondary, aromatic, and heterocyclic amines, diamines, and amino acids, are converted to the corresponding formamides with good-to-excellent conversions and selectivities under mild conditions. This strategy employs CO 2 as a mediator to activate the amine under metal-free conditions. The experimental data and in situ NMR and attenuated total reflectance IR spectroscopy measurements support the formation of the N -carbamic acid as an intermediate through the weak acid–base interaction between CO 2 and the amine. The metathesis reaction is driven by the formation of a stable carbamate, and a reaction mechanism is proposed.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xinru Wang,Yannan Zhou,Jiaoyu Peng,Wenhu Li,Xin Liu
Octadecylamine hydrochloride (ODA H) as an efficient flotation collector is extensively employed in KCl manufacturing. However, the residual of ODA-H not only directly influences KCl application fields, but also poses environmental risks owing to its low biodegradability. Meanwhile, the removal cost is comparatively high because of KCl solubility. In this study, a simple yet effective strategy was proposed to achieve efficient in-situ desorption of ODA-H from the solid KCl surface. The desorption behavior and underlying mechanism were systematically investigated, focusing on charge state conversion, interfacial wettability change, and ODA-H aggregation. The results demonstrated that OH − significantly enhanced the removal efficiency of ODA H, with a removal rate of 86 % achieved when the pH of the saturated KCl solution was raised to 14. In-situ Raman spectroscopy and Molecular Dynamics simulation elucidated the mechanism of OH − , which could accelerate ODA-H desorption kinetics by disrupting the electrostatic interaction between ODA-H and KCl surface, thereby altering its aggregation behavior. Furthermore, the disruption mechanism of interfacial hydrogen-bonding networks during the OH − -promoted desorption process was confirmed. The synergistic effects resulting from these enhancements facilitated the highly efficient desorption of ODA-H from the solid KCl surface. Importantly, industrial-grade KCl was refined with the ODA-H desorption efficiency of 73.95 %. This study will provide a new idea and mechanism explanation for the removal of pollutants on the soluble solid surface in high-salt solution.
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TETRAHEDRON
·
2018
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IF 2.377
Jie Zhu,Wenhui Zhu,Ping Xie,Charles U. Pittman,Aihua Zhou
A novel and efficient Ni-catalyzed aryl- and alkyl-selenation of imidazo[1,2-α]pyridines employing selenium powder has been developed for the first time. The significant advantages of this protocol are that it is an inexpensive nickel catalyst and exhibits broad functional-group compatibility and good reaction yields.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Qi Zhang,Minghui Li,Zhuofan Zuo,Tianhang Zhan,Xiaoyan Li,Wei Zhang
Cotton, as one of the world’s most crucial economic crops, suffers from a markedly shortened service life of its fabrics due to microbial degradation. In this study, N-isopropylacrylamide (NIPAM) containing amide bonds was grafted onto cotton fibers via atom transfer radical polymerization (ATRP) to develop a heat-resistant and wash-durable N-halamine functionalized cotton fabric (PN@CF-Cl). The resulting material exhibited rapid and potent antibacterial activity, killing over 85 % of bacteria within 1 min of contact and achieving > 99.9 % inactivation of Staphylococcus aureus and Escherichia coli within 10 min. After 50 washing cycles at 75 °C, the antibacterial activity retention remained above 97 %. Following storage for 30 days, rechlorination restored the active chlorine content to its initial level. Even after 10 consecutive chlorination–reduction cycles, the active chlorine recovery reached 98.9 %. In addition, the fabric demonstrated high hydrophobicity, air permeability, and moisture vapor transmission. Molecular dynamics (MD) simulations further validated the dynamic interconversion between N–Cl and N–H in the material, elucidating the underlying mechanism for its regenerative performance. Functionalized cotton fabrics based on the N–Cl/N–H dynamic cycling mechanism can extend product lifespan and hold significant promise for applications in medical protective equipment and smart home textiles.
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EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
·
2015
·Vol. 2016
·期 2
·325-330
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IF 3.065
Wannian Zhao,Lei Xu,Yingcai Ding,Ben Niu,Ping Xie,Zhaogang Bian,Denghong Zhang,Aihua Zhou
Coumarin derivatives are highly valuable compounds in drug discovery. Herein, we have developed two new coupling reactions that involve coumarins and either aldehydes or di- tert -butyl peroxide (DTBP) in the presence of inexpensive copper or iron catalysts. Both of these reactions proceed through a C(sp 2 )–H functionalization process to regioselectivity generate keto- or methyl-substituted coumarin derivatives in moderate to good yields These coupling reactions will enrich current coumarin chemistry. Graphical Two coupling reactions that regioselectively yield either keto- or methyl-substituted coumarin derivatives by proceeding through a C(sp 2 )–H functionalization process were successfully developed. The coupling of coumarins with either aldehydes or di- tert -butyl peroxide (DTBP) generated the corresponding products in moderate to good yields.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Haoquan Zhuang,Pengcheng Lin,Ying Chen
Janus evaporators achieve an energy utilization efficiency of 97.88%. • Janus evaporators demonstrate evaporation rates of 4.31 kg·m −2 ·h −1 . • Janus evaporators exhibit excellent long-term stability for 12 days. • Janus evaporators produce 18.53 kg·m −2 of fresh water per day. Solar interfacial evaporation is an emerging sustainable freshwater production technology. However, its effectiveness is often hindered by insufficient heat and mass transfer, the inherently high enthalpy of vaporization of water, and salt management issues. This study proposes a Janus-type photothermal semiconductor@biomass porous hydrogel evaporator to achieve high-rate and highly energy-efficient solar interfacial evaporation. Efficient biomass-based water transport channels were constructed through a microphase separation process and in-situ ionic crosslinking. The hydrophilic microenvironment of polar polymers was utilized to regulate the aggregation state of water molecules and reduce the equivalent enthalpy of vaporization. The Janus evaporator was assembled from photothermal semiconductors (tellurium nanoparticles) and biomass porous hydrogels to synergistically improve evaporation efficiency. Under one sun illumination, the evaporator achieved evaporation rates of 4.31 kg·m −2 ·h −1 in deionized water and 3.10 kg·m −2 ·h −1 in 3.5% simulated seawater, with an energy efficiency of 97.88%. Furthermore, due to the salt diffusion facilitated by the porous structure, it exhibited stable salt tolerance in simulated seawater with a high salinity of 10%. Outdoor natural seawater desalination experiments further confirmed its water production capacity and long-term stability, and the desalinated water quality met drinking water standards. This work provides a novel and forward-looking strategy for designing environmentally friendly, efficient, and stable solar evaporators.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 30
·17299-17305
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IF 3.43
Chenyang Zhou,Ya Chu,Linlin Ma,Yingqian Zhong,Chao Wang,Yalan Liu,Haoyue Zhang,Beibei Wang,Xia Feng,Xi Yu,Xiaotao Zhang,Yan Sun,Xiaozeng Li,Guangjiu Zhao
In this work, we introduced halogen-substituted chiral molecules as A-site cations to synthesize a series of novel organic–inorganic hybrid two-dimensional (2D) chiral perovskite materials (R-X-p-mBZA)2PbBr4 (X = H, F, Cl, Br; p: para-position; mBZA = α-methylbenzylamine) for the first time. This halogen-substituted cation strategy collectively solved problems of narrow emission, weak chirality and low photoluminescence quantum yield (PLQY) for the emerged chiral perovskites. Photoluminescence (PL) spectra are significantly broadened due to the additional emission from self-trapped excitons (STEs) besides free excitons (FEs) states modulated by introducing significant disorder to the Pb–Br–Pb angle. The chirality of A-site chiral molecules is transferred and amplified to entire perovskite materials by fixing the chiral molecules at A-site via the interaction of halogen atoms. Furthermore, their PLQYs are improved with the reduction of energy gap and inhibition of the non-radiative transition from STEs to ground state. The halogen-substituted A-site cation strategy can be performed to develop organic–inorganic hybrid chiral perovskites with various optoelectronic applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Kuang Wang,Zhanqiang Fang
In this work, a cost-effective ball-milling technique was employed to synthesize submicron oxalated zero-valent iron co-doped with graphite and nickel (G@Fe OX bm /Ni), aiming to enhance the removal efficiency of the recalcitrant pollutant 2, 2′, 4, 4′ – tetrabromodiphenyl ether (BDE-47) while minimizing secondary risks. The incorporation of graphite significantly improved the debromination efficiency of BDE-47, with a rate constant of 0.26 day −1 in a tetrahydrofuran/water system, which represents a 59.88 % increase over the oxalated zerovalent Fe/Ni without graphite (0.16 day −1 ). The determination of Ni leaching showed that no nickel ions were detected post-reaction over a broad pH range (3–11). Moreover, the reactivity of G@Fe OX bm /Ni was largely unaffected across the pH range (0.26–0.49 day −1 ), exhibiting excellent resistance to acidic and alkaline conditions. In both ultrapure water and real groundwater matrices, the degradation rate constants for BDE-47 increased to 2.98 day −1 and 0.79 day −1 , respectively, achieving debromination yields of 97.86 % and 50.18 % for the final product, diphenyl ether. Based on the established degradation pathway and electrochemical analysis, the debromination of BDE-47 follows a catalytic debromination and hydrogenation process by adsorbed atomic hydrogen (H* ADS ). The graphite doping enhanced the debromination of BDE-47 by increasing the production of H* ADS . The adsorption effect of graphite on metal ions effectively controlled secondary pollution and improved the material’s tolerance to acidic and alkaline environments. This work offers an efficient method for the degradation of low brominated diphenyl ether pollutants at a low cost and without secondary risks.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Wang,Hong Wang,Sinong Huang,Jiao Feng,Yifei Wu,Jing Deng,Junping Liu,Xiang Tu,Xiaoyan Ma,Xueyan Li,Andrea M. Dietrich
Complete dehalogenation of halogenated organic pollutants has attracted increasing attention, and electrocatalytic reduction processes are considered prospective technologies due to their high selectivity for carbon-halogen bonds. In this study, a vitamin B 12 (VB 12 ) composite electrode was prepared and applied to remove the refractory tribromoacetic acid (TBAA). The reduction process dominated by the VB 12 composite electrode showed a degradation efficiency of 55.2 % for 200 μg/L TBAA within 60 min. Interestingly, UV irradiation considerably increased the efficiency of TBAA for dehalogenation on the VB 12 composite electrode. The photoelectrochemical co-catalytic system of a VB 12 composite electrode coupled with UV (LP UV 254 nm) could remove 92.2 % of TBAA in 20 min with a rate constant 12 times higher than the VB 12 -only electrolysis system. The in situ Raman characterization and cyclic voltammetry tests confirmed that the accelerated formation of Co-Br bonds and the enhanced atomic H* mediated ability were responsible for improving debromination efficiency. The degradation of TBAA mainly underwent chemical reactions of debromination and mineralization. Acetic acid, formic acid, formaldehyde, and Br - were the major transformation products of TBAA. Acidic conditions favoured TBAA removal in the UV synergistic VB 12 electrolytic system, and excellent cycling stability of debromination was obtained in complex aqueous environments (actual bodies of water containing various inorganic and organic matter). This research provides an efficient dehalogenation technology for halogenated micropollutants and novel perspectives on the scientific design of photoelectrochemical dehalogenation processes.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Enming Ping,Xiaoxiao Chen,Yunshan Zhou,Lijuan Zhang,Lingyun Kong,Nan Chen
In this work, CAU-10-H@γ-AlOOH is prepared, and then UTSA-16 is loaded on CAU-10-H@γ-AlOOH to obtain UTSA-16@CAU-10-H@γ-AlOOH. Using the as-prepared composites as stationary materials by cryogenic gas chromatography at 77 K, while CAU-10-H@γ-AlOOH achieves the complete separation of ortho-H2 (o-H2) and D2 with a resolution R of 1.66 and a separation time t of 9.52 min, UTSA-16@CAU-10-H@γ-AlOOH achieves higher efficiency separation of hydrogen isotopes in a shorter separation time (4.56 min) with R = 1.7. Molecular simulation results show that CAU-10-H has both chemical affinity quantum sieving and kinetic sieving effects for H2/D2 at 77 K, and UTSA-16 can only exert the kinetic sieving effect. UTSA-16’s load on CAU-10-H@γ-AlOOH weakens the adsorption of hydrogen isotopes, and the presence of Co2+ in UTSA-16 promotes the conversion of para-H2 to ortho-H2. In gas chromatography, H2 was preferentially desorbed from the system due to strong D2 adsorption caused by the chemical affinity quantum sieving effect and faster H2 diffusion caused by the kinetic sieving effect. These additive effects achieved efficient hydrogen isotope separation at 77 K.
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ORGANIC & BIOMOLECULAR CHEMISTRY
·
2026
·
IF 2.8
Lin Chen,Shuang Xu,Zhiming Chen
Direct α-C(sp3)−H arylation of 4-aminopyrazolones involving arynes, enabled by dual phase-transfer catalysis and ultraviolet irradiation, has been developed. The dual phase-transfer catalytic pathway powered by triaminocyclopropenium salts gave rise to the generation of structurally diverse 4-amino-4-arylpyrazolones in moderate to excellent yields, while the photochemical protocol furnished the products with moderate yields. Notably, these products are tentatively proposed as candidates for carbamate pesticides based on the preliminary structural analysis. The synthetic potentials of the methods were shown by gram-scale reactions, and the possibilities for greater structural diversity of the product were highlighted by derivatizations. The results of control experiments indicated that the timely capture of the transient arynes by the activated 4-aminopyrazolone nucleophiles is the key to the success of the reactions.
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