Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123598
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IF 7.5
Di Li,Huimin Zhu,Yuan Zhang,Shaofei Yang,Ruiyu Zhu,Jiaoe Dang,Fang Song,Jun Zhou
The escalating global energy crisis and environmental pollution has drawn increasing attention. As a green and sustainable alternative, photocatalytic H 2 O 2 synthesis has attracted widespread interest. In this study, we has designed a novel exciton-regulated photocatalyst (Bi@g-C 3 N 4 /ST-NS) by integrating bismuth-doped graphitic carbon nitride with porphyrin-based supramolecular nanostructures (ST-NS). The composite was synthesized through a sequential process involving solvothermal reaction, high-temperature calcination, and solution-phase self-assembly. We systematically investigated its crystal structure, photoelectronic properties, and the mechanistic basis of photocatalytic H 2 O 2 production. Characterization results confirmed the successful incorporation of Bi single atoms into the sixfold cavities of g-C 3 N 4 , forming a p-n heterojunction with ST-NS while preserving the crystallinity of the host matrix. The built-in interfacial electric field not only promoted efficient charge separation but also extended the visible-light absorption range and prolonged the carrier lifetime. Performance evaluations revealed that Bi@g-C 3 N 4 /ST-NS exhibited significantly enhanced H 2 O 2 generation activity compared to pristine Bi@g-C 3 N 4 , with optimal performance achieved at a 10:1 mass ratio. Under visible-light irradiation, the H 2 O 2 concentration reached 1134 μM in the reaction solution, representing a 2.5-fold improvement over Bi@g-C 3 N 4 . Mechanistic studies indicated that the heterojunction facilitated efficient intersystem crossing from singlet to triplet excitons. Rather than following the conventional superoxide radical (·O 2 - ) pathway, these triplet excitons activated ground-state oxygen to generate singlet oxygen ( 1 O 2 ) via resonance energy transfer. The subsequent highly selective two-electron reduction of 1 O 2 yielded H 2 O 2 , effectively circumventing the high-energy barrier steps associated with traditional pathways. This work thus presented a promising strategy for the rational design of high-efficiency photocatalytic systems through exciton regulation.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Yuxin Ge,Zhenchao Li,Tong Zhang,Yang Lu,Lijin Xie,Danyang Yu,Xiaochuan Ren
Flexible carbon buffering and rigid TiO 2 confinement stabilize Bi nanoparticles. • Amorphous TiO 2 with pseudocapacitive ion storage acts as an ion-transport bridge for fast Na + shuttling to Bi. • The as-prepared electrode exhibits excellent fast-charging capability and long-term cycling stability. Developing fast-charging sodium-ion batteries (SIBs) is highly desirable yet fundamentally challenging due to the sluggish Na + diffusion kinetics and severe structural degradation of electrode materials. Despite their high theoretical capacity, alloy-type Bi anodes suffer from severe volume expansion and inherently sluggish solid-state sodiation kinetics, which lead to limited rate capability. Herein, Bi/TiO 2 /C composite nanofibers (BTC) are fabricated via electrospinning and carbonization, achieving uniform embedding of Bi nanoparticles in an amorphous TiO 2 -decorated carbon nanofiber. The carbon framework provides flexible buffering and a conductive network. Amorphous TiO 2 not only acts as a rigid filler to further buffer the expansion and aggregation of Bi but also exhibits pseudocapacitive Na + storage behavior, allowing it to function as a local Na + reservoir and ion-transport bridge. This structure enables rapid Na + supply to adjacent Bi active sites, thereby accelerating the stepwise alloying reaction and maintaining fast reaction kinetics even at ultrahigh rates. This synergistic effect enables the BTC anode to deliver 226.16 mAh g -1 after 3000 cycles at 20 A g -1 , and the assembled Na 3 V 2 (PO 4 ) 3 @C (NVP@C)//BTC full cell maintains 207.72 mAh g -1 after 4000 cycles. This study offers an innovative strategy for structural regulation and performance optimization of anode materials for high-capacity fast-charging SIBs. A novel Bi/TiO 2 /C composite nanofiber anode is rationally designed via electrospinning and carbonization for fast-charging sodium storage. Amorphous TiO 2 serves dual roles as ion-transport bridges that enrich Na + and as dispersants that prevent Bi agglomeration, while the carbon matrix buffers volume expansion, thereby synergistically accelerating sodiation kinetics and enabling ultrahigh rate capability with long-term cycling stability. Download: Download high-res image (267KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Qiu-ran Lu,Ying-jie Sun,Ya-mei Xue,Xiao-jing Wang,Hui-ying Mu,Fa-tang Li
A dual-scale Ag-Bi/TiO 2 -Ov architecture couples photogenerated electrons with interfacial protons, resolving the kinetic disconnect in CO 2 methanation. • Adjacent Ag-Bi sites synergistically lower the barrier for *COOH formation while facilitating proton spillover from TiO 2 -Ov. • The optimized photocatalyst achieves a CH₄ evolution rate of 75.17μmol·g −1 ·h −1 with 97.2% selectivity under sacrificial-agent-free conditions. Solar-driven CO 2 -to-CH 4 conversion could help close the anthropogenic carbon loop, yet its practical realization is consistently undermined by poor selectivity and a kinetic disconnect between interfacial electron transfer and proton availability. Herein, we address these limitations by constructing a dual-scale architecture that deliberately couples proton spillover dynamics with CO 2 activation pathways. Highly dispersed Ag-Bi hetero-bimetallic nanoalloys are integrated onto oxygen-vacancy-enriched TiO 2 through a one-step reductive transformation of metal oxyacid precursors, establishing atomically intimate Ag-Bi dual active sites. Operando diffuse reflectance infrared Fourier transform spectroscopy coupled with density functional theory calculations reveals that this bimetallic interface not only lowers the *CO 2 →*COOH free-energy barrier and stabilizes *CO intermediates to suppress parasitic desorption, but also orchestrates directional proton spillover via localized electrostatic modulation. Electrons relayed from the oxygen-vacancy-rich TiO 2 converge spatially with protons generated in situ at surface oxygen vacancies, establishing a concerted proton-coupled electron transfer channel that governs the sequential hydrogenation of adsorbed *CO to CH 4 . Guided by this mechanistic rationale, the optimized photocatalyst (A 1 B 1 T30) achieves a CH 4 production rate of 75.17 μmol·g −1 ·h −1 with 97.2% selectivity. By resolving how electrons and protons converge at the interface, the work identifies a concrete materials lever for selective C 1 photoreduction. Download: Download high-res image (196KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
He Zhao,Chu Xu,Caobin Zhou,Ling Zhang,Chunzhong Li
Existing triboelectric nanogenerators (TENGs) for wearable sweat sensors are plagued by low power density, which restricts their practical application. This study focuses on boosting TENGs output power via a fluorinated bi-layer electronic textile (e-textile) fabricated by electrospinning rotary collection, enabling self-powered dual functionality: real-time electrochemical sweat sensing and human motion detection. The key design includes a PCLU-HFDD negative triboelectric layer (molecularly incorporated with hexadecafluorodecanediol to enhance electron affinity) and a poly(lactic- co -glycolic acid) (PLGA) positive layer. Rotary collection creates vein-like nanostructures on PCLU-HFDD yarns (6.2 μm roughness, 114.8° water contact angle), increasing contact area. The PCLU-HFDD TENG achieves a high power density of 0.66 W m −2 , an open-circuit voltage (Voc) of 117.08 V, and excellent stability over 35,000 contact-separation cycles. Critically, integrated with both sweat-sensing and motion-detection capabilities, the e-textile enables 180-min continuous glucose monitoring (under sedentary conditions) and recognition of human motions. This work confirms that the power enhancement not only overcomes the bottleneck of TENGs for wearable sensors but also facilitates dual-modal health monitoring, advancing the development of practical wearable bioelectronics.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
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IF 7.7
Shikun Li,Qin Zhou,Junru An,Silong Qiang,Weihao Hu,Zhixiu Sun,Jianjun Liao,Shiwei Lin
Traditional electrochemical methods often face challenges in accurately detecting heavy metal ions in seawater due to high salinity and complex organic matrices. Herein, a porous, defect-rich graphitic carbon nitride/bismuth–bismuth oxide (pdr-g-C 3 N 4 /Bi@Bi 2 O 3 ) composite was fabricated via two-step calcination and hydrothermal assembly, and applied for simultaneous Cd(II) and Pb(II) detection by SWASV. The unique porous structure and abundant defect sites facilitate efficient ion preconcentration and electron transfer, leading to high sensitivity and selectivity. Under optimized conditions in sodium acetate–acetic acid buffer (pH 6.0), the sensor exhibits linear detection ranges of 5–200 ppb for both Cd(II) and Pb(II), with limits of detection (LOD) of 0.513 ppb and 0.313 ppb, respectively. Remarkably, the sensor demonstrates excellent stability and accuracy even in unprocessed seawater samples, achieving LODs of 0.32 ppb for Cd(II) and 10.13 ppb for Pb(II). These results confirm the feasibility of direct, on-site detection of trace heavy metals in complex marine environments, offering a practical strategy for rapid environmental monitoring.
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ACS Catalysis
·
2026
·
IF 13.6
Shunwu Wang,Zhenbo Guo,Bing Tang,Jinglin Du,Qianling Zou,Ligang Wang,Xiaohui Li,Xiaodong Zhou,Lang Liu,Yadong Li
Developing chemoselective hydrogenation of alkynes into alkenes is one of the major strategies of the fine chemical industry; however, it presents significant challenges in achieving the semi-hydrogenation of carbon−carbon triple bond (C=C) to carbon−carbon double bond (C=C) without further hydrogenation. Herein, it is proposed that d−p orbital hybridization between the Pd single-atom-cluster sites and the bismuth species can serve as a descriptor for revealing the catalytic activity. Guided by DFT simulation, the well-dispersed Pd clusters and single-atom Pd−O4 sites on Bi-doped hydroxyapatite (PdSA+C/HAP-Bi) are fabricated for semi-hydrogenation of phenylacetylene, realizing the trade-off between activity and selectivity with a robust turnover frequency of 10,140 h−1, surpassing those of the commercial Pd/C catalyst and most of the reported catalysts. It also displays good stability for enduring six cycles with minimal declines in conversion and selectivity. Notably, this catalyst offers a general platform, showcasing broad substrate compatibility across at least 30 types of alkynes. Particularly, the introduction of well-dispersed Bi and PdC can induce prominent electron redistribution at the Pd−O4 sites and adjust the hybridization between the central Pd 3d and Bi 4f orbitals. Simultaneously, the strong electronic coupling in Pd−O−Bi pairs facilitated the d-electron domination near the Fermi level, boosted the activation of H2 and phenylacetylene at PdC sites, and improved the desorption capacity of styrene at Pd−O4 sites. This synergy ultimately lowers the energy barrier for the phenylacetylene semi-hydrogenation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Wei Mao,Liguo Wei,Xiaohu Xu,Lishuang Zhao,Junyun Liu,Zihan Zhang
To screen out suitable electrode materials and overcome the shortcomings of the existed electrode materials for the application in dye-sensitized solar cells and supercapacitors , NiS 2 /reduced graphene oxide (NiS 2 /rGO) composite material was prepared by a simple one-step hydrothermal method in this paper and applied in the field of both dye-sensitized solar cells and supercapacitors as electrode material. In an electrolyte of 6 M KOH, the NiS 2 /rGO composite material with bilayer capacitance characteristics exhibited a high specific capacitance of 259.20 F g −1 at the current density of 0.6 A g −1 , which was significantly higher than that of rGO (188.94 F g −1 ). Moreover, at a current density of 2 A g −1 , the NiS 2 /rGO composite material had 92.85% capacitance retention after 2000 cycles. When applied as counter electrode material for the dye-sensitized solar cells, the NiS 2 /rGO composite material counter electrode exhibited a satisfactory photoelectric conversion efficiency ( η ) of 3.16% under standard simulated sunlight (AM 1.5 G), which was significantly higher than that of single rGO counter electrode (improved by 90.40%). The NiS 2 /rGO composite electrode material prepared by a simple one-step hydrothermal method is a potential bi-functional composite electrode materials for both dye-sensitized solar cells and supercapacitors.
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Defence Technology
·
2023
·
IF 5.1
Chao Wang,Ying Liu,Mingze Wu,Jia Li,Ying Feng,Xianjin Ning,Hong Li,Ningfei Wang,Baolu Shi
A novel design of micro-aluminum ( μ Al) powder coated with bi-/tri-component alloy layer, such as: Ni–P and Ni–P–Cu (namely, Al@Ni–P, Al@Ni–P–Cu, respectively), as combustion catalysts, were introduced to release its huge energy inside Al-core and promote rapid pyrolysis of ammonium perchlorate (AP) at a lower temperature in aluminized propellants. The microstructure of Al@Ni–P–Cu demonstrates that a three-layer Ni–P–Cu shell, with the thickness of ∼100 nm, is uniformly supported by μ Al carrier (fuel unit), which has an amorphous surface with a thickness of ∼2.3 nm (catalytic unit). The peak temperature of AP with the addition of Al@Ni–P–Cu (3.5%) could significantly drop to 316.2 °C at high-temperature thermal decomposition, reduced by 124.3 °C, in comparison to that of pure AP with 440.5 °C. It illustrated that the introduction of Al@Ni–P–Cu could weaken or even eliminate the obstacle of AP pyrolysis due to its reduction of activation energy with 118.28 kJ/mol. The laser ignition results showed that the ignition delay time of Al@Ni–P–Cu/AP mixture with 78 ms in air is shorter than that of Al@Ni–P/AP (118 ms), decreased by 33.90%. Those astonishing breakthroughs were attributed to the synergistic effects of adequate active sites on amorphous surface and oxidation exothermic reactions (7597.7 J/g) of Al@Ni–P–Cu, resulting in accelerated mass and/or heat transfer rate to catalyze AP pyrolysis and combustion. Moreover, it is believed to provide an alternative Al-based combustion catalyst for propellant designer, to promote the development the propellants toward a higher energy.
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DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 2
·476-486
·
IF 4.569
Junlei Wang,Kuan Wang,Zhen-Hong He,Tong Sun,Run-Jing You,Jian-Gang Chen,Weitao Wang,Yang Yang,Zhao-Tie Liu
Oxygen-containing organics, which are generated from the selective oxidation of their corresponding hydrocarbons, have high value in the chemical and pharmaceutical industries. However, their oxidation reactions are very challenging as the products are more active than the substrates, especially for the oxidation of cyclohexane (CHA). Herein, we focused on the one-step preparation of Bi2WO6 with double active sites of tunable metallic Bi and oxygen vacancies (OV–Bi/Bi2WO6) by a facile solvothermal treatment. Then, OV–Bi/Bi2WO6 was used as an efficient photocatalyst for the partial oxidation of CHA to cyclohexanone (CHA-one) for the first time in air as an oxidant under solvent-free and room temperature conditions. The Bi : Bi2WO6 ratio in the as-prepared OV–Bi/Bi2WO6 heterojunction could be tailored from 0.08 to 8.43 by controlling the solvothermal temperature, and the synergistic effect between DMF and EG could increase the reduction of MDF/EG and promote the production of Bi. Moreover, OV–Bi/Bi2WO6-160 yielded 4.4 and 8.8 times more CHA-one (128.8 μmol) than pure Bi2WO6 and metallic Bi, respectively, and achieved 93.6% selectivity to CHA-one in air as an oxidant under solvent-free conditions. The results revealed that the highly enhanced photocatalytic activity was mainly attributed to the superior specific surface area, outstanding photo-absorption, abundant oxygen vacancies, and efficient electron–hole separation. Moreover, for the unique double active sites in OV–Bi/Bi2WO6, oxygen vacancies can enhance the adsorption and activation capacity of Bi2WO6 for O2, while metallic Bi can improve the adsorption and activation capacity of Bi2WO6 for CHA. Meanwhile, OV–Bi/Bi2WO6 also exhibited excellent durability due to the strong interaction between metallic Bi and Bi2WO6. The present work provides a flexible approach for tailoring the Bi : Bi2WO6 ratio and outlines an effective method for producing CHA-one from CHA under mild conditions.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Lan Ding,Yongping Ding,Fenghua Bai,Gonglai Chen,Shuwei Zhang,Xiaoxue Yang,Huiqin Li,Xiaojing Wang
Given the global warming caused by excess CO2 accumulation in the atmosphere, it is essential to reduce CO2 by capturing and converting it to chemical feedstock using solar energy. Herein, a novel Cs3Bi2Br9/bismuth-based metal–organic framework (Bi-MOF) composite was prepared via an in situ growth strategy of Cs3Bi2Br9 quantum dots (QDs) on the surface of Bi-MOF nanosheets through coshared bismuth atoms. The prepared Cs3Bi2Br9/Bi-MOF exhibits bifunctional merits for both the high capture and effective conversion of CO2, among which the optimized 3Cs3Bi2Br9/Bi-MOF sample shows a CO2–CO conversion yield as high as 572.24 μmol g–1 h–1 under the irradiation of a 300 W Xe lamp. In addition, the composite shows good stability after five recycles in humid air, and the CO2 photoreduction efficiency does not decrease significantly. The mechanistic investigation uncovers that the intimate atomic-level contact between Cs3Bi2Br9 and Bi-MOF via the coshared atoms not only improves the dispersion of Cs3Bi2Br9 QDs over Bi-MOF nanosheets but also accelerates interfacial charge transfer by forming a strong bonding linkage, which endows it with the best performance of CO2 photoreduction. Our new finding of bismuth-based metal–organic framework/lead-free halide perovskite by cosharing atoms opens a new avenue for a novel preparation strategy of the heterojunction with atomic-level contact and potential applications in capture and photocatalytic conversion of CO2.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Ding Jiang,Yuting He,Jinrui Zhang,Jie Yin,Jing Ding,Shuang Wang,Hongping Li
Conjugate acid-base bi-functional PILs (CAB-PILs) with carboxylate and carboxyl branches were synthesized and used as catalysts for the cycloaddition reaction of glycidol with CO 2 . Two functional ionic monomers, 3-(carboxymethyl)-1-vinyl-1H-imidazol-3-ium chloride (CEImCl) and 2-(1-vinyl-1H-imidazol-3-ium-3-yl) acetate (CCIm), were introduced into the CAB-PILs skeleton. In this case, we proved the excellent characteristics of the catalyst containing both Lewis base and Bronsted acid sites for converting CO 2 to cyclic carbonate under mild conditions. The catalyst showed good reusability and remained excellent activity after five reaction cycles. Combined with XPS, FTIR and DFT calculations, it is proved that the CCIm ionic monomer not only play the role of CO 2 absorption center, but also has synergistic effect with CEImCl in CAB-PILs to promote cycloaddition reaction.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lixia Wang,Yanjing Qin,Huatong Li,Zhiyang Huang,Mingcheng Gao,Tayirjan Taylor Isimjan,Xiulin Yang
Designing multi-channel mesoporous structure and introducing oxygen vacancies to synergistically enhance oxygen reduction reaction (ORR) activity is crucial for the practical application of zinc-air batteries (ZABs) in the field of energy storage and conversion. Herein, a novel multi-channel mesoporous Bi-Fe 2 O 3 microsphere with abundant oxygen vacancies supported on nitrogen-doped carbon (denoted as Bi-Fe 2 O 3 @NC) is constructed and the designated catalyst demonstrates a higher half-wave potential (0.88 V), large limiting current density (5.8 mA cm −2 @0.4 V), and superior stability. Besides, the aqueous ZAB utilizing Bi-Fe 2 O 3 @NC cathode achieves a high power density of 198.6 mW cm −2 and maintains exceptional stability for 459 h at 5 mA cm −2 , superior to most previously reported catalysts. Furthermore, a solid-state ZAB assembled with Bi-Fe 2 O 3 @NC shows a power density of 55.9 mW cm −2 , highlighting its potential for flexible ZAB applications. The prominent ORR performance of Bi-Fe 2 O 3 @NC can be ascribed to its unique multi-channel mesoporous structure and abundant oxygen vacancies, which increase the exposure of active sites and facilitate efficient electron/mass transport. This work provides valuable insights for the rational design of advanced ORR catalysts for the practical requirements of aqueous/flexible ZABs in energy storage and conversion.
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