CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Jiajun Wan,Jiyang Tian,Qian Zhang,Jie Liu
Developing renewable green energy is one of key approaches to achieve dual carbon goals, which is supported by high-efficiency energy storage technologies. Aqueous Zn-I 2 batteries (AZIBs) are quite promising grid energy storage systems due to their intrinsic safety and low cost, but are plagued by polyiodide shuttling and sluggish conversion kinetics. To tackle the issues, a binder-free Bi 2 O 3 @N-CNTs aerogel electrode with hierarchical pore structure has been developed, featured by Bi 2 O 3 nanoparticles embedded in the N-doped CNTs matrix. Removing of polymer binder not only reduces the inactive component in the electrode but also avoids covering active sites. Notably, polyiodide affinity and catalytic capability of novel Bi 2 O 3 electrocatalyst can be enhanced significantly via the formation of Bi–N bonds, which has been demonstrated by the X-ray photoelectron spectroscopy and systematic electrochemical tests. The resultant AZIB demonstrates superior cycling stability, maintaining a capacity of 148.7 mA·h·g −1 after 5,000 cycles with a high capacity retention of 87.1%. Specially, the high-loading pouch cell can also deliver a stable capacity of 2 mA·h over 40 cycles with an areal loading of 10 mg·cm −2 , highlighting the practicality of the Bi 2 O 3 @N-CNTs aerogel electrode.
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Asian Journal of Organic Chemistry
·
2026
·Vol. 15
·期 9
·e70547
·
IF 2.3
Yan Wang,Yunjun Wu,Yawen Li,Qingqing Liu,Jiang-Fei Li,Shaoyin Wang
A Lewis acid-catalyzed cascade reaction to carbazole, naphthalene, tetrahydropyrano[4,3- b ]indole, and isochromane frameworks from readily available 2-arylethan-1-ol and propargylic alcohols is described. A plausible reaction pathway is deduced from the identification and structural analysis of a key intermediate. Furthermore, the scalability of this protocol was demonstrated through a gram-scale synthesis.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Hongxia Zhang,Junxin Huang,Ming Zhong,Bitao Su,Ziqiang Lei
Carbon nitride-based heterojunction catalysts show broad application prospects for the degradation of wastewater pollutants (e.g. antibiotics and dyes), yet their performance remains challenges in narrow light absorption range and high carrier recombination rate. The introduction of components with matched band structures and surface plasmon resonance can mitigate these limitations. Herein, a Schottky heterojunction composed of plasma Bi and MoO 2 -incorporated carbon nitride (Bi/MoO 2 @CN) is designed and synthesized via solvothermal-calcination method. Multiple preparation parameters are optimized to achieve the reduction of Bi 2 MoO 6 (BMO) to plasma Bi metal and MoO 2 . The synergistic structural and compositional effects endow the optimal material with exceptional adsorption-photocatalytic activity, achieving 96.19% tetracycline (TC) degradation within 90 min under visible light. The first-order kinetic constant is seven times higher than CN. The catalyst also demonstrates versatility in removing diverse organic dyes. Active species trapping experiments identify holes (h + ) and superoxide radicals ( ⸱O 2 − ) as primary reactive species. Furthermore, enhanced photocatalytic mechanism is elucidated through band structure analysis, Schottky heterojunction characterization, and TC degradation pathway study.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yan Lai,Luying Chen,Qiucheng Fu,Liang Jiang,Yongjuan Chen,Jiao He,Ning Zhang,Zhiying Yan
In this study, we propose a novel composite system combining black phosphorus (BP) nanosheets with Bi-MOF to overcome the three main limitations of conventional photocatalysts, narrow photoresponse range, high carrier recombination rate, and poor stability. The unique properties of BP, characterized by their narrow bandgap, are leveraged to expand the spectral response spectrum. The heterojunction interface facilitates the directed separation of charge carriers, while the MOF skeleton provides protection against environmental degradation, thus enhancing overall stability. In the experiments, a combined hydrothermal-ultrasonic approach was employed to ensure close interfacial contact between BP and rod-like Bi–BTC, resulting in the formation of an effective heterojunction. The BP/Bi–BTC composite exhibits remarkable broad-spectrum absorption characteristics, substantially expanding the photoresponse range and effectively inhibiting carrier complexation. Concurrently, the protective Bi–BTC skeleton successfully prevents direct environmental exposure of black phosphorus, enhancing its stability. The BP/Bi–BTC composite displays exceptional photocatalytic performance in the degradation of RhB, achieving an impressive degradation efficiency of 98.7% within just 30 min of UV–visible irradiation. This performance surpasses both single-component systems and conventional catalysts. Notably, the material retains 94.1% of its initial activity even after three consecutive catalytic cycles. Characterization analysis elucidated the interfacial charge transfer and uncovered the underlying catalytic mechanism of the composite system.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Ming Wang,Xiang Sui,Xingrui Liu,Zhen Yu,Yijing Chen,Pengkun Li,Angelo Vicini,Shaowei Chen,Wenming Sun,Qiang Wang
Bi/Bi 2 Ce 2 O 7 heterojunctions produced hydrothermally in the presence of mannitol. • Photocatalytic fixation of nitrogen to ammonium up to 49 times that of Bi 2 Ce 2 O 7. • Localized surface plasmon resonance (LSPR) of in situ produced metallic Bi. • Synergy with oxygen vacancy facilitates nitrogen adsorption and activation. Metallic bismuth exhibits unique localized surface plasmon resonance (LSPR) and persistent catalytic activity, due to effective absorption in the UV–visible region that can trigger LSPR and promote the separation of photogenerated charge carriers, leading to efficient photocatalysis. In this study, Bi/Bi 2 Ce 2 O 7 (Bi/BCO) heterojunctions are in situ constructed via hydrothermal treatment of cerium(III) chloride and bismuth(III) chloride in the presence of a calculated amount of mannitol. Among the series, Bi/BCO-2, prepared with a 4 mmol feed of mannitol, exhibits the greatest photocurrent under visible light irradiation, which is 18 times that of Bi 2 Ce 2 O 7 (BCO) prepared in the absence of mannitol. In photocatalytic nitrogen fixation, the Bi/BCO-2 sample achieves the highest ammonium generation rate of 248.4 μmol g −1 h −1 , 49 times greater than that of BCO. This is accounted for by the in situ formation of metallic Bi on BCO, where the LSPR effect, in synergy with oxygen vacancies in BCO, facilitates the adsorption and activation of nitrogen and intermediates and reduces the energy barriers of key steps in the catalytic reduction of nitrogen to ammonia. Download: Download high-res image (173KB) Download: Download full-size image
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PubMed
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 12
·e70865
·
IF 4.1
Yacong Yang,YaKun Qu,Zhixiong Yang,Yu Wu,Xiaoguang Zhao,Haibo Yin,Yuning Huo,Zongli Xie
Photocatalytic reduction of nitrate (NO 3 − ) to ammonia (NH 3 ) has garnered growing attention as a sustainable route for simultaneous nitrate pollution remediation and value-added ammonia synthesis under ambient conditions. However, its efficiency remains severely limited by the intrinsically high structural stability of nitrate anions and inefficient charge-carrier utilization. In this study, a Fe-doped Bi/Bi 2 WO 6 photocatalyst (H-Fe-B/BWO) is constructed via a facile hydrothermal method followed by calcination in a reducing atmosphere. The experimental results reveal that the optimized H-Fe-B/BWO exhibits significantly enhanced photocatalytic nitrate reduction performance, achieving an NH 3 production rate of 2.419 mmol g cat −1 h −1 with a high selectivity of 99.3% in the presence of ethylene glycol (EG), representing an approximately 4.5-fold improvement compared with pristine Bi 2 WO 6 . The remarkable enhancement originates from the synergistic effect between Lewis acidic sites generated by Fe dopants with unsaturated coordination environments and the surface plasmon resonance of metallic Bi, which collectively facilitates nitrate activation and improves charge-carrier separation and utilization. This work provides a rational strategy for designing efficient photocatalysts for selective NO 3 − -to-NH 3 conversion under environmentally benign conditions, contributing to sustainable nitrogen management and circular economy-driven resource recovery. Graphical The enhanced photocatalytic nitrate-to-ammonia conversion over H-Fe-B/BWO can be summarized as a cooperative process involving surface reaction chemistry and charge-carrier dynamics. Fe dopants introduced into the Bi 2 WO 6 lattice generate coordinatively unsaturated metal centers, which function as Lewis acidic sites capable of strongly interacting with nitrate anions through O-metal coordination. This interaction promotes nitrate adsorption and induces structural distortion of the NO 3 − species, thereby lowering the activation barrier for the initial N─O bond cleavage. Simultaneously, reductive calcination leads to the in situ formation of metallic Bi on the catalyst surface, which serves as a plasmonic component under visible light irradiation. The surface plasmon resonance of metallic Bi not only broadens the light-harvesting capability but also enhances local electromagnetic fields, facilitating the separation and migration of photogenerated charge carriers. As a result, photogenerated electrons are more efficiently delivered to nitrate species adsorbed at Lewis acidic sites, enabling a sustained multi-electron reduction pathway toward ammonia while suppressing competing reactions. The intimate coupling between nitrate activation at Fe-derived Lewis acidic sites and plasmon-induced charge utilization accounts for the high activity and selectivity observed over the H-Fe-B/BWO photocatalyst.
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Advanced Science
·
2026
·
IF 14.1
Yuqing Zeng,Chao He,Zhibin He,Hongbo Chen,Fang Cheng,Yongjiang Zheng
The immunosuppressive bone marrow microenvironment (BMM) and cytokine dysregulation remain major barriers to curing multiple myeloma (MM). Despite the promise of B-cell maturation antigen (BCMA)-targeted therapies, their clinical utility is often limited by antigen escape and insufficient immune activation. Here, we developed DB Exo, a cell-free therapeutic platform utilizing allogeneic dendritic cell-derived exosomes engineered to surface display BCMA. Mechanistically, DB Exo act as molecular decoys that predominantly sequester soluble APRIL with partial BAFF attenuation, thereby effectively disrupting NF-κB pro-survival signaling in MM cells. Concurrently, DB Exo retain inherited costimulatory molecules (CD80, CD86, and MHC-II) to trigger strong host immune activation, expanding CD8 + T cells and enhancing the secretion of cytotoxic effector molecules. In an orthotopic murine model, DB Exo suppress tumor burden by ∼72% and remodel the BMM by increasing cytotoxic T-lymphocyte infiltration and elevating serum IFN-γ and Granzyme B levels. The robust antitumor efficacy was further validated in a subcutaneous model, with DB Exo achieving a ∼75% reduction in tumor weight. Our findings establish DB Exo as a potent bi-functional exosome platform that integrates targeted cytokine blockade with in situ immune activation, offering a promising cell-free strategy for MM treatment.
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高影响因子
Carbohydrate Polymer Technologies and Applications
·
2025
·
IF 6.5
Jiheng Xiao,Tianqi Liu,Wentian Wang,Hao Liu,Wei Chang,Yiran Zhang,Xianglin Zhang,Yingze Zhang,Bin Wu,Liming Xiong
The exposed bone wound is defined as a kind of wound with bone denuded of periosteum and the deficiency of full-thickness skin and muscles. The wound have no matrix microenvironment and is prone to infection and, hence, hard to heal. Granulation tissue is significant during wound healing, providing a matrix and resisting infection. 3D printing is adopted to fabricate dermis and epidermis regeneration. However, the porosity of most 3D-printed scaffolds is low, leading to a poor drug-loading capacity. To address these limitations, this study developed an alginate-based hierarchical porous scaffold fabricated via cryogenic bi-nozzle 3D printing, enabling dual-factor spatial delivery of VEGF and LL-37 to simultaneously promote angiogenesis and immunomodulation. The alternating dual nozzle printing allows the scaffolds to carry two biological factors with spatial distribution while maintaining the structure integrity. In vitro studies demonstrated enhanced tube formation and endothelial migration, while in vivo implantation in rabbit exposed bone wounds revealed accelerated granulation tissue regeneration and re-epithelialization. The drug-loaded scaffolds can induce the tube formation of vascular endothelial cells, assist inflammatory cells in resisting infection, and ultimately form a fully functional granulation tissue. These results demonstrate the potential clinical applicability of this immunomodulatory dual-factor scaffold for challenging exposed bone wound repair.
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CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Ruishan Zhang,Shunning Li,Feng Pan,Bingkai Zhang
Li2ZrCl6 (LZC), a halide-based solid-state electrolyte, combines high ionic conductivity with cost-effectiveness, yet its atomic-scale ion transport mechanisms and doping strategies are insufficiently understood. Using first-principles calculations and ab initio molecular dynamics (AIMD) simulations, we first evaluated the intrinsic Li-ion migration behavior in bulk LZC. Potential energy surface analysis based on Li-ion site energies, combined with AIMD calculations, confirms the potential promotional effect of bismuth (Bi) cation doping on bulk ionic conductivity, increasing it to 10.93 mS cm–1 and reducing the activation energy to 241.77 meV. Experimental results also demonstrate that Bi doping significantly enhances the electrical conductivity of LZC. This improvement is attributed to a transition from short- to long-range cooperative Li-ion migration. Additionally, 50% bromine (Br) substitution helped to reduce energy fluctuations caused by cation disorder, leading to a more uniform migration pathway. Statistical analysis across multiple solid-state electrolyte (SSE) systems further showed that shorter nearest-neighbor Li–Li distances are strongly correlated with higher conductivity and lower activation energies. This work highlights the importance of local structure and short-range interactions in halide SSEs and proposes a Bi-doped LZC as a cost-effective, high-performance candidate for next-generation solid-state batteries.
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CATALYSIS LETTERS
·
2020
·Vol. 151
·期 3
·901-908
·
IF 2.482
Wu Yuting,Yang Long,Wu Bo,Li Jie,Liu Binyao,Ke Gaili,Dong Faqin,Zhou Yong,He Huichao
It has been reported that β -MnO 2 has photocatalytic activity for the oxidative-coupling of 2-naphthols into 1,1′-bi-2-naphthols. Nevertheless, it is hard to exclude the possibility that the oxidative-coupling of 2-naphthols is initiated by β -MnO 2 catalysis in dark due to the insufficient investigations in the related reports. In the present work, the oxidative-coupling of 2-naphthols into 1,1′-bi-2-naphthols with different phases MnO 2 catalysis in dark and under visible-light irradiation were systematically investigated. The results revealed that the oxidative-coupling of 2-naphthols is jointly initiated by MnO 2 catalysis and O 2 -oxidation, not by MnO 2 photocatalysis. Among the α -MnO 2 , β -MnO 2 , γ -MnO 2 and δ -MnO 2 catalysis, β -MnO 2 catalysis has the optimal performance, its selectivity for the oxidative-coupling of 2-naphthols into 1,1′-bi-2-naphthols is close to 100%, and its catalytic capacity could be well retained after multiple using. Our findings provide comprehensive and accurate understanding the catalytic role of MnO 2 for the oxidative-coupling of 2-naphthols into 1,1′-bi-2-naphthols. Graphic In the present work, the oxidative-coupling of 2-naphthols into 1,1′-bi-2-naphthols was proved to be jointly initiated by MnO 2 catalysis and O 2 -oxidation, not by MnO 2 photocatalysis. β -MnO 2 has the optimal catalytic activity for the oxidative-coupling of 2-naphthols relative to α -MnO 2 , γ -MnO 2 and δ -MnO 2 .
研究领域:
催化化学
·
有机合成
·
材料化学
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物理化学
·
纳米催化
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122633
·
IF 7.5
Xiaoxuan Li,Ying Lv,Jiaxin Du,Xuelian Chen,Meixia Xiao,Shubin Lei
Defect engineering coupled with heterojunction construction represents a pivotal strategy for optimizing the charge separation dynamics of photocatalysts. Herein, we report the fabrication of a novel Z-scheme heterojunction composed of bismuth-based metal-organic frameworks (NOTT-220) and layered Bi 2 O 2 [BO 2 (OH)] nanosheets via a hydrothermal approach. To further potentiate the photocatalytic activity, surface oxygen vacancies (OVs) were precisely introduced into the heterostructure through controlled ultraviolet (UV) irradiation. This defect-rich engineering strategy significantly broadened the visible-light absorption range and facilitated the separation of photogenerated carriers. Consequently, the optimized catalyst (OVs-BN-20) exhibited a superior photocatalytic reaction rate constant of 0.8133 min −1 , achieving 95.9% degradation rate of CIP within 2 h. Detailed mechanistic investigations, including liquid chromatography-mass spectrometry (LC-MS) and electron spin resonance (ESR), elucidated the degradation pathways and confirmed the synergistic role of superoxide radicals (·O 2 -) and photogenerated holes (h + ). This work not only provides a facile pathway for designing defect-modulated Z-scheme photocatalysts but also offers profound insights into the mineralization mechanisms of persistent antibiotic pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Chenglong Xie,Xinxin Zhang,Haitao Yu,Ying Xie
Designing efficient, stable, and inexpensive catalysts for water splitting was critical for efficient, sustainable energy conversion. Here, a one-pot hot-colloidal route was adopted to synthesize the mono-dispersed NiCoP catalyst with a particle size of∼5.0 nm. To further improve the structural stability and electronic conductivity of the catalysts, carbon nanotubes (CNTs) were introduced. The theoretical calculations suggested that a synergistic effect between Ni and Co in the NiCoP catalyst not only leads to an obvious charge redistribution but also facilitates the electron transfer from the surface to the reactant intermediates, being responsible for the optimal ΔG H* of the catalyst. As a result, NiCoP/CNTs exhibited good HER performance both in acidic and alkaline electrolytes . The overpotentials under alkaline and acidic electrolytes were 110 mV and114 mV at a current density of 10 mA cm −2 , respectively. In comparison with pristine Ni 2 P(Co 2 P), the overpotential of NiCoP/CNTs in acidic and alkaline electrolytes was reduced by 50(24) and 62(30) mV at the current density of 10 mA cm −2 . Even at the current densities of 50 and 200 mA cm −2 , NiCoP/CNTs still retains a much lower overpotential than other samples. Our results revealed the important roles of the synergistic effect between the transition metals and the interaction between CNTs and the phosphides, which provides some useful information for the design and optimization of relevant HER catalysts.
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