ACS Catalysis
·
2026
·Vol. 16
·期 15
·14804-14817
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IF 13.6
Liu Hongjing,Ren Shan,Li Xiaodi,Liu Manyi,Chen Peng,He Chi,Bai Bofeng,Chai Shouning,Dong Fan
Efficient photocatalytic mitigation of nitrogen oxides (NO x ) under ambient conditions remains challenging due to limited charge-carrier separation and poor selectivity in regulating reactive oxygen species (ROS), which often results in undesirable NO 2 accumulation. In this study, bismuth molybdate (Bi 2 MoO 6 ) was employed as a model photocatalyst, on which dual active sites composed of plasmonic metallic Bi nanoparticles and ultrasmall spin-polarized NiO were in situ constructed. Plasmonic Bi enhances visible-light absorption and hot-electron generation via localized surface plasmon resonance, while NiO establishes a spin-selective electron-transfer pathway that facilitates efficient O 2 activation. This cooperative interface suppresses exciton recombination and promotes a superoxide (·O 2 – )-dominated oxidation pathway. Consequently, the optimized Bi-NiO@BMO achieves 77.0% NO removal, 76.7% nitrate selectivity, and minimal NO 2 accumulation (<11 ppb), representing a 9.7-fold enhancement compared with pristine Bi 2 MoO 6 . In practical applications, the PTFE-assisted loading technique allows the material to be fixed onto ceramic foam, achieving an 84% NO removal efficiency and further enhancing photocatalytic performance. Spectroscopic analyses combined with density functional theory (DFT) calculations confirm that the plasmon–spin interaction lowers the free-energy barriers for ·O 2 – formation and deep NO oxidation. This work provides a mechanistic insight into plasmon-spin-regulated ROS generation and offers a rational design strategy of highly selective photocatalysts for environmental NO x abatement.
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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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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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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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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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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
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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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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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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Nature Communications
·
2026
·Vol. 17
·期 1
·1699
·
IF 15.7
Sui Huiting,Lou Wenhua,Xiao Shibing,He Jia,Wu Fuling,Liu Ying,Wei Jianbiao,Lu Haijie,Sun Huajun,Ma Xiaoguang,Zhang Shujun
Defect microstructures, particularly dislocations, are pivotal in determining the functional properties of ferroelectric thin films. While their density is routinely considered, the critical role of their spatial configuration has remained largely unexplored and difficult to control. Here, we develop a controlled self-assembly strategy for dislocations in Bi(Fe,Mn)O 3 thin films on Ni-Cr that directly addresses this challenge. By employing a LaNiO 3 buffer layer, we template a discontinuous-columnar grain structure and guide the self-assembly of edge dislocations along grain boundaries in a topologically-protected configuration. The resulting ordered microstructure promotes a more uniform strain field and more coherent FeO 6 octahedral tilting, significantly enhances polarization homogeneity, leading to a lower domain-switching barrier and a more uniform domain pinning effect. Consequently, the BFMO thin film exhibits dramatically superior aging stability after 60 days at 60 °C, exhibiting far smaller reductions in remanent polarization (~20%) and coercive field (~35%) compared to the BFMO thin film grown directly on Ni-Cr. These findings establish a defect engineering paradigm wherein the deliberate dislocation rearrangement is leveraged to unlock superior ferroelectric performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
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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ULTRASONICS SONOCHEMISTRY
·
2022
·
IF 9.336
Shanghai Dong,Liying Wang,Weiyi Lou,Yunxin Shi,Zhenzhu Cao,Yongfeng Zhang,Junmin Sun
For the first time, piezocatalysis activity has been observed in bismuth-based MOFs (ultrasound vibration treatment) with two different morphologies, namely FCAU-17 (flakes) and CAU-17 (rods). CAU-17 and FCAU-17 were synthesized by solvothermal and ultrasonic methods, respectively, with the same organic ligand (1,3,5-benzenetricarboxylic acid) and metal salt (Bi(NO 3 ) 3 ·5H 2 O). Among these, the apparent rate constant k of CAU-17 in piezo-photocatalysis is 3.9 × 10 −2 min −1 , which is ∼3.9 and ∼ 1.5 times of those in photocatalysis and piezocatalysis, respectively. CAU-17 showed much high piezo-photocatalytic activity during degradation of RhB. Efficiently coupling between piezocatalysis and photocatalysis has been realized in rod-like CAU-17 (ultrasound vibration treatment). Our results provide a new strategy to improve catalytic performance of Bi MOFs through an efficient synergistic piezo-photocatalysis approach for environmental remediation.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Hao Li,Liqun Wang,Nan Li,Jianmin Feng,Feng Hou,Sihui Wang,Ji Liang
Electrocatalytic nitrogen reduction reaction (eNRR) at the ambient conditions is attractive for ammonia (NH 3 ) synthesis due to its energy-efficient and eco-friendly features. However, the extremely strong N≡N triple-bonds in nitrogen molecules and the competitive hydrogen evolution reaction lead to the unsatisfactory NH 3 yield and the Faradaic efficiency (FE) of eNRR, making the development of high-performance catalysts with adequate active sites and high selectivity essential for further development of eNRR. Addressing this, we herein report a Bi and K dual-doped titanium oxide (BTO@KTO) material, which is prepared by a cation exchange reaction between K 2 Ti 4 O 9 and molten BiCl 3 , for high-performance eNRR catalysts. Benefiting from the controllable molten-salt cation exchange process, a highly active surface containing Bi/K sites and rich oxygen vacancies has been obtained on titanium oxide. Under the synergy of these two merits, an efficient eNRR catalysis, with the NH 3 yield rate of 32.02 μg h −1 mg cat. −1 and the FE of 12.71%, has been achieved, much superior to that of pristine K 2 Ti 4 O 9 . This work thus offers a high-performance electrocatalyst for eNRR, and more importantly, a versatile cation-exchange strategy for efficiently manipulating materials' functionalities.
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