SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lin Qiao,Ze Zhang,Pengfei Yuan,Dong Fu
In recent years, CO 2 adsorption technology has garnered widespread attention, making the development of efficient CO 2 adsorbents a critical issue. This study has synthesized N, S co-doped carbon spheres (NxSyCz) using hydrothermal, impregnation, and one-step carbonization-activation methods, and systematically investigated their CO 2 adsorption performance. Characterization results reveal that NxSyCz possesses a rich microporous structure and a high specific surface area, with nitrogen and sulfur elements successfully doped into the carbon framework in various forms. Furthermore, CO 2 adsorption experiments demonstrate that NxSyCz exhibits excellent static CO 2 adsorption capacity (3.42 mmol/g at 298.15 K) and superior dynamic CO 2 adsorption capacity (3.08 mmol/g at 318.15 K). Additionally, NxSyCz displays good cyclic regeneration performance and high CO 2 /N 2 adsorption selectivity (IAST Selectivity = 117). Density Functional Theory (DFT) calculations further confirm that the presence of N and S functional groups significantly enhances the CO 2 adsorption selectivity of the adsorbent. Overall, the doping of N and S elements, along with the formation of a rich microporous structure, greatly enhances the CO 2 adsorption capacity of NxSyCz. Therefore, NxSyCz is expected to have promising applications in the field of CO 2 separation from coal-fired flue gases.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Rong Zhang,Jiaqi Wang,Shiying Yang,Wenjun Kuang
Gold-cyanide complex (Au(CN) 2 − ) prevalent in alkaline metallurgical/electroplating wastewater poses significant hazards, requiring environmentally friendly treatments. As a prominent amphoteric reductant, aluminum (Al 0 ) tends to react with water, regulating its electron transport process is crucial. Herein, a novel copper-modified aluminum composite (Cu@Al 0 ) was synthesized via one-step ball milling to tailor electron transport rate and direction, enabling rapid and efficient removal of Au(CN) 2 − (nearly 100% in 30 min) with simultaneous recovery of metallic gold. Specifically, over 92.13% of the gold was recovered as zero-valent gold (Au 0 ), whereas ∼100% total cyanide retained in the solution. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirmed that Au(I) was reduced to Au 0 and attached to Cu@Al 0 surface. The recovery of gold was primarily relied on the high electron utilization efficiency of Al 0 (94.51%), where electrons were preferentially allocated to the reduction of Au(CN) 2 − rather than to the side reaction of hydrogen production. It was observed that copper played a crucial role. During ball milling, interfacial interaction between Al 0 and CuSO 4 ·5H 2 O was induced, contributing to the in situ formation of zero-valent copper (Cu 0 ) through a solid-phase chemical reaction. During the decomplexation of Au(CN) 2 − , Cu 0 served as the affinity site for gold and an electron transport bridge, preventing the excessive corrosion of Al 0 under alkaline conditions, and controlling the transmission rate and direction of electrons and providing more electrons to Au(CN) 2 − . In conclusion, this study employs a novel approach to recover valuable resource from Au(CN) 2 − , offering a promising avenue for the treatment of metallurgical/electroplating wastewater.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Tao Yang,Peihang Li,Yingxue Mei,Dong Cai,Chongju Chen,Shuo Yang,Zhi Yang
To address the severe lithium polysulfide (LiPS) shuttle effect and sluggish redox kinetics of lithium–sulfur (Li–S) batteries, especially under high-temperature conditions, we introduce a high-efficiency natural thermostable catalyst, oxalate oxidase (OxOx), into the cathodes. Endowed with a unique hexameric structure, OxOx maintains robust catalytic activity at elevated temperatures (≥60 °C) and facilitates rapid electron/Li⁺ transport via its C-terminal α-helices. More importantly, its manganese-active center enhances LiPS adsorption and accelerates the liquid-solid conversion of sulfur species by lowering reaction energy barriers. Consequently, the OxOx-modified cathode delivers outstanding rate performance, long-cycle stability with ultra-low capacity decay, and effective shuttle suppression even under harsh high-temperature operating conditions.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Long Bai,Yifei Chen,Xuedi Wu,Nan Chang,Ren Li,Zhi Yao,Weiping Li
In this study, a series of g-C 3 N 4 /BiOBr S-scheme heterojunction photocatalysts with varying BiOBr contents were synthesized via an in-situ hydrothermal strategy. The optimized composite, CB-15 (15 wt% BiOBr), exhibited a remarkable hydrogen evolution rate of 1925.9 μmol g −1 h −1 under visible light, significantly surpassing those of pristine g-C 3 N 4 and BiOBr. Comprehensive characterizations revealed enhanced light absorption, expanded surface area, improved surface wettability, interfacial coupling, and electrochemical active surface area (ECSA) as confirmed by water contact angle, in situ XPS, and CV measurements. Photophysical analyses and femtosecond transient absorption spectroscopy provided further insights into the charge transfer mechanism, supporting the conclusion that g-C 3 N 4 and BiOBr form a direct S-type heterojunction structure. Density Functional Theory calculations validated this mechanism, revealing enhanced interfacial charge redistribution and a reduced Gibbs free energy barrier for hydrogen evolution. Electron Paramagnetic Resonance analysis showed the co-generation of •O 2 − and •OH radicals, aligning with the proposed S-scheme pathway. This work provides a comprehensive strategy for the rational design of high-performance photocatalysts for solar-driven hydrogen production.
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Materials
·
2026
·Vol. 19
·期 5
·845
·
IF 3.7
Hongfei Wu,Yanlong Gao,Senwei Wu,Xiujian Zhao,Yi Xie,Shouqin Tian
Organic dye pollution in industrial wastewater poses a serious environmental challenge, with methylene blue (MB) serving as a typical persistent pollutant due to its stable chemical structure, recalcitrance to degradation, and eco-toxicity. Conventional physical, chemical, and biological treatment methods suffer from limitations such as insufficient efficiency, high cost, or the tendency to generate secondary pollution. Based on green and sustainable photocatalysis technology, this study designed and prepared a NiO/SrTiO3p-n heterojunction photocatalysts, aiming to broaden the light-response range and enhance charge-carrier separation efficiency. The optimal sample (NiO (10%)/SrTiO3) achieved complete photocatalytic degradation of MB within 9 min, with an apparent rate constant 34.6 times that of pure SrTiO3. It also showed good cyclic stability. Trapping experiments confirmed that •OH and •O2−were the key active species in the degradation process. Combined with band structure and PL analyses, an S-scheme charge-transfer mechanism was proposed, clarifying the critical role of the built-in electric field at the heterojunction interface in promoting carrier separation while maintaining high redox capability. This work not only provides a new pathway for developing efficient and stable SrTiO3-based photocatalysts but also offers theoretical and experimental support for the practical application of p-n heterojunction photocatalysts in environmental pollution control.
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SENSORS
·
2026
·Vol. 26
·期 11
·3569
·
IF 4
Xiao Liu,Pengbo Zhu,Hao Ren,Yao Wang,Jun Li,Yan Zhang,Qiao Wang,Soo Wohn Lee,Laurence A. Belfiore,Mikhail Artemyev,Jianguo Tang
HighlightsWhat are the main findings?We have successfully fabricated a novel fluorescent cotton fabric (FCF) sensor grafted with hydrophilic MPA-stabilized Cu-In-Zn-S core–shell QDs.The FCF sensor demonstrates a PL response when in contact with aqueous solutions containing various anions, including Br−, Cl−, F−, PO43−, and OH−.What are the implications of the main finding?This preparation method is simple, reproducible, and cost-effective, with broad application prospects.Negatively charged molecules and anions are widely present in the natural environment and can pose a threat to aquatic life, affecting their survival and reproduction. As the understanding of the hazards of negatively charged molecules and ions deepens, the need for real-time monitoring governs the development of highly sensitive and convenient sensing materials. Here, highly luminescent Zn-Cu-In-S core–shell colloidal quantum dots were grafted onto cotton fabric to produce a fluorescence cotton fabric (FCF) optical sensor demonstrating photoluminescence response to the presence of several anions in water, such as phosphate (PO43−), hydroxide (OH−), fluoride (F−), chloride (Cl−), or bromide (Br−). After contact with water solutions containing these anions, PL output from FCF remarkably decreases, with specific functional dependence on the concentration of the selected anions. The fluorescent fabric sensing material is easy to operate, achieving real-time detection of negatively charged groups and showing great potential for application in environmental monitoring.
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Polymers
·
2026
·Vol. 18
·期 10
·1202
·
IF 5.8
Liangcong Fan,Peisen Xu,Hongyu Wang,Zhifeng Cai,Juan Zuo,Cong Liu,Xiaohang Tan,Fengxiong Long,Hao Luo,Qingqing Gao
A novel transition-metal-free alkyne–thiol click polymerization with 100% atom economy is reported. Using t BuOLi as a catalyst at 80 °C, the polymerization efficiently yields poly(vinyl sulfide)s (PVSs) with molecular weights up to 11,800 g/mol and yields up to 91%. These sulfur-rich polymers exhibit high thermal stability ( T d up to 293 °C) and high refractive indices (1.8375–1.6383) across the visible range. By integrating abundant sulfur coordination sites with aggregation-induced emission (AIE) properties, the PVS aggregates serve as high-performance fluorescent chemosensors. The sensor enables exclusive, sensitive trace detection of Pd 2+ and Au 3+ with remarkable anti-interference capability and pH robustness (pH 1–7). Notably, an ultrafast response (1–2 min) for Pd 2+ is achieved, with limits of detection (LOD) reaching 7.11 × 10 −7 M for Pd 2+ and 1.06 × 10 −6 M for Au 3+ , and corresponding limits of quantification (LOQ) reaching 2.37 × 10 −6 M and 3.53 × 10 −6 M, respectively. This methodology offers a sustainable route to heteroatom-rich macromolecules for next-generation optical engineering and environmental monitoring.
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Science China-Materials
·
2019
·Vol. 63
·期 4
·533-543
·
IF 5.636
Wang Chenyi,Tao Zhengwang,Zhao Xiaoyan,Li Jian,Ren Qiang
In order to effectively improve the properties of anion exchange membrane (AEM) materials, a series of novel poly(aryl ether nitrile)s with flexible side-chain-type quaternary phosphonium cations (PAEN-TPP- x ) were designed and prepared on the basis of considering the influences of polymer backbone, cationic group species and the connection way between the cations and polymer chains. The synthetic method, structure and ion-exchange capacity, water absorption, swelling, hydroxide conductivity and alkaline stability of the obtained AEMs were studied. A comparative study with other reported AEMs was also performed for further exploration of the relationship between the structure and properties. These AEMs with flexible side-chain-type quaternary phosphonium cations displayed good comprehensive properties. Their water uptakes and swelling ratios were in the range of 11.6%–22.7% and 4.4%–7.8% at 60°C, respectively. They had hydroxide conductivity in the range of 28.6–45.8 mS cm −1 at 60°C. Moreover, these AEMs also exhibited improved alkaline stability, and the hydroxide conductivity for PAEN-TPP-0.35 could remain 82.1% and 80.6% of its initial value at 60 and 90°C in 2 mol L −1 NaOH solution for 480 h, respectively.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Zhenwei Li,Shaoshao Jiao,Di Yu,Qian Zhang,Kang Liu,Jishu Han,Ziyang Guo,Jie Liu,Lei Wang
Because of the advantages of high theoretical capacity, low cost, and environmental friendliness, lithium–sulfur (Li–S) batteries have attracted wide attention as promising energy storage system for electric vehicles and smart power grids. However, their commercialization is still greatly restricted by their poor cycle stability, resulting from the severe shuttling of soluble lithium polysulfides (LiPSs) during cycling. Herein, we designed a CNT@cationic polymer/rGO (CNT@CP/rGO) blocking layer on a commercial PP separator. Such a blocking layer can strongly fix LiPSs by the electrostatic attraction effect between the cationic polymer backbones and the polysulfide anions. As a result, a Li–S battery equipped with a CNTs@CP/rGO-functionalized separator showed much improved cycling stability with a capacity fading rate as low as 0.06% per cycle during 700 cycles at 1 C. Especially, high areal capacity of 6.3 mAh cm–2 was also achieved with a high sulfur loading of 8.5 mg cm–2 after 50 cycles. This work highly emphasizes that the electrostatic attraction mechanism between cationic polymers and polysulfides can effectively restrain the polysulfide shuttling and thus significantly improve the electrochemical performance of Li–S batteries.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yilong Lin,Dongdong Chen,Shuanjin Wang,Dongmei Han,Min Xiao,Yuezhong Meng
The effective passivation of a sulfur electrode in Li–S pouch cells is addressed by increasing the discharging cutoff voltage from 1.6 to 2.0 V. This simple method can effectively suppress the generation of solid and insulated Li2S deposition while reserves the majority of capacity and improves the cyclic stability of Li–S pouch cells. Upon increasing the discharging cutoff voltage from 1.6 to 2.0 V, the Li–S pouch cell loses only 8% of the initial discharge capacity and remarkably promotes the capacity retention rate from 62.4 to 91.6% within 40 cycles at 0.05C. The analysis of electrochemistry and physics of a sulfur cathode demonstrates that the less Li2S deposition under the discharging cutoff voltage of 2.0 V can ensure fast reaction kinetics in Li–S pouch cells with high areal sulfur loadings and lean electrolyte. The mechanism of the passivation of a sulfur electrode is studied and discussed in detail. This brand new methodology may provide an effective approach to enhance the cyclic stability of a Li–S battery.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
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ACS Catalysis
·
2026
·
IF 13.6
Zhibo Su,Guoqiang Peng,Min Li,Guowei Zhou,Jiandong Pang,Falu Hu
Photocatalytic CO2 conversion into high-value-added products represents a promising approach to mitigating global energy demands and environmental problems. S-scheme heterojunctions hold significant potential for photocatalytic CO2 reduction owing to their efficient spatial charge separation and preserved strong redox capabilities, with the internal electric field (IEF) serving as the primary driving force for directional charge transfer. However, achieving precise and rational modulation of the IEF to further boost photocatalytic CO2 conversion efficiency remains a considerable challenge. Herein, we propose a crystal facet engineering strategy to finely tailor the IEF in S-scheme heterojunctions by employing metal−organic frameworks (MOFs) with well-defined exposed facets. A series of NH2-MIL-125@ZnIn2S4 (NM@ZIS) heterojunctions were constructed, and among them, the NM111@ZIS heterojunction interfaced exclusively with the (111) facet was demonstrated to possess the strongest IEF, as unambiguously verified by combined experimental characterization and density functional theory (DFT) calculations. This optimized charge configuration resulted in good photocatalytic CO2 reduction performance, yielding a CO evolution rate of 145.55 μmol·g−1·h−1, substantially outperforming counterparts with mixed or other facet orientations. This work provides a viable pathway for customizing the IEF in S-scheme heterojunctions through MOF crystal facet engineering, offering generalizable insights for the rational design of high-performance photocatalysts.
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CHIRALITY
·
2023
·Vol. 35
·期 4
·247-255
·
IF 2
Yan He,Mengdi Qin,Mo Li,Defu Zhi,Baocheng Tian,Feng Qin
Flurbiprofen axetil (FA) is a prodrug of flurbiprofen (FP), and it is hydrolyzed to the active FP by carboxylesterase in plasma after intravenous injection. The pharmacological action of FP is closely related to its chirality, and S-FP shows better analgesic effects than R-FP. Therefore, it is of great significance to compare the in vivo pharmacokinetic behaviors of R-FP and S-FP. In this study, we designed a sensitive high performance liquid chromatography–tandem mass spectrometry method and used CHIRALPAK-IG3 column for chiral separation to quantify the concentrations of R-FP and S-FP in rat plasma. The results show that this method can accurately and effectively analyze the contents of R-FP and S-FP in plasma. In addition, the systemic exposure was approximately 3.09-folds for the S-FP compared with the R-FP following intravenous administration of the FA to rats at a single dose of 4.5 mg/kg. More importantly, the clearance rate of S-FP is significantly smaller than that of R-FP. Therefore, the development of S-FA injectable emulsion for clinical treatment of postoperative pain is very necessary.
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