ChemSusChem
·
2025
·
IF 6.6
Kuan Wang,Yuan-Xiao Du,Huan Ma,Rui Luo,Zhe Cao,Zhen-Hong He,Jian-Gang Chen,Weitao Wang,Huan Wang,Zhao-Tie Liu
In the context of energy shortage and global warming, the transformation of carbon dioxide (CO 2 ) into value-added chemicals through photocatalytic processes has garnered significant attention. However, constructing highly efficient photocatalytic materials for CO 2 reduction continues to present substantial challenges, especially for the customization of highly efficient heterojunction photocatalysts. Herein, honeycomb-like BiOCl/Bi 2 Ti 2 O 7 S-scheme heterojunctions with enriched oxygen vacancies are successfully fabricated by an interlayer self-assembly strategy. The experimental results demonstrated that the photocatalytic CO production over BiOCl/Bi 2 Ti 2 O 7 -3 composites reached 48.16 μmol g −1 h −1 , exhibiting a high selectivity (96.6%) and an excellent stability. The photocatalytic activity exhibited a remarkable improvement, achieving 2.4- and 133.7-fold enhancement compared with that of the pristine BiOCl and Bi 2 Ti 2 O 7 , demonstrating a superior performance of the synthesized composite catalyst. The remarkable enhancement in photocatalytic performance stems from the synergistic effect among the unique interface structure of S-scheme heterojunction, oxygen vacancy engineering, and the porous honeycomb-like morphology. The S-scheme heterojunction, with its unique band structure, can effectively enhance light utilization efficiency, improve the reduction capacity of photogenerated carriers, and thereby accelerate their separation and transfer. This meticulous design presents a unique approach for the customization of S-scheme heterostructures with desirable charge transfer for efficient photoreduction of CO 2 applications. Graphical A honeycomb-like BiOCl/Bi 2 Ti 2 O 7 S-scheme heterojunction with enriched oxygen vacancies wasis fabricated by an interlayer self-assembly strategy, boosting the photocatalytic CO 2 reduction performance.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Benhua Liu,Zhaoyu Ma,Na Zheng,Chunxiao Ren,Ju Tang,Fan Zhang,Guo Chen
N-, S-, and B-doped carbon quantum dots (CQDs) were synthesised via a hydrothermal method, with N and S derived from cysteine, and B derived from boric acid. Then the CQDs were combined with ZnO to obtain a new type of surface-functionalised photocatalytic degradation materials. The photocatalytic degradation performance of these composites against various common organic pollutants and sulphonamide antibiotics was systematically studied. Results showed that CQDs modification enhanced photocatalytic efficiency and degradation rate. Doping with individual elements further improved performance, while co-doping with N, S, and B achieved the highest degradation rate. The degradation rate of rhodamine B reached 97.56 %. More importantly, the pH level had a remarkable influence on the photocatalytic activity of the composites with acidic conditions favouring the photocatalytic reaction. Free-radical trapping experiments indicate that ·O 2 – and ·OH played dominant roles in the photocatalytic process. In addition, the composites maintained good photocatalytic degradation performance after multiple cycles, demonstrating excellent stability.
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高影响因子
Nature Catalysis
·
2022
·Vol. 5
·期 3
·193-201
·
IF 40.706
Cao Deqing,Shen Xiaoxiao,Wang Aiping,Yu Fengjiao,Wu Yuping,Shi Siqi,Freunberger Stefan A.,Chen Yuhui
Redox mediators could catalyse otherwise slow and energy-inefficient cycling of Li–S and Li–O 2 batteries by shuttling electrons or holes between the electrode and the solid insulating storage materials. For mediators to work efficiently they need to oxidize the solid with fast kinetics but with the lowest possible overpotential. However, the dependence of kinetics and overpotential is unclear, which hinders informed improvement. Here, we find that when the redox potentials of mediators are tuned via, for example, Li + concentration in the electrolyte, they exhibit distinct threshold potentials, where the kinetics accelerate several-fold within a range as small as 10 mV. This phenomenon is independent of types of mediator and electrolyte. The acceleration originates from the overpotentials required to activate fast Li + /e − extraction and the following chemical step at specific abundant surface facets. Efficient redox catalysis at insulating solids therefore requires careful consideration of the surface conditions of the storage materials and electrolyte-dependent redox potentials, which may be tuned by salt concentrations or solvents.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2013
·Vol. 51
·期 24
·5248-5256
·
IF 3.543
Yu Zhang,Keke Gao,Zhongfu Zhao,Dongmei Yue,Yanming Hu,Toshio Masuda
Novel acetylenic monomers containing Schiff-base and amino groups, ( S )- N -(4-ethynylbenzylidene)-1-phenylethanamine ( 1a ), ( R )- N -(4-ethynylbenzylidene)-1-phenylethanamine ( 1b ), N -(4-ethynylbenzylidene)-1-phenylethanamine ( 1c ), ( R )- N -(4-ethynylbenzyl)-1-phenylethanamine ( 1d ), and ( R )- N -(4-ethynylbenzyl)-1-phenylethanamine ( 1e ) were synthesized and polymerized with [(nbd)RhCl] 2 /Et 3 N catalyst to afford the corresponding polymers 2a - e with moderate molecular weights ( M n = 9000–60,000) in high yields (85–97%). All the polymers were soluble in common organic solvents including toluene, CHCl 3 , CH 2 Cl 2 , THF, and DMF. Large optical rotations and strong CD signals demonstrated that 2a , 2b , 2d , and 2e take helical structures with a predominantly one-handed screw sense. The effects of solvents and temperature revealed that these polymers took dynamic helical structure based on the steric effect of side groups. The CD patterns of 2d and 2e containing free amino moieties were completely inverted by the addition of benzoic acid. Upon further addition of NaOH, the CD pattern returned to the original one, indicating the reversible conformational change of these polymers according to pH. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013 , 51 , 5248–5256
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APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Ruixin Ma,Fan Yang,Shina Li,Xiaoyong Zhang,Xiang Li,Shiyao Cheng,Zilin Liu
CZTSSe is an important earth abundant collection of materials for the development of low cost and high efficiency thin film solar cells. This work developed a simple non-vacuum-based route to fabricate CZTSSe absorber films. This was demonstrated by first synthesizing Cu 2 ZnSnS 4 (CZTS) nano-crystalline based on solid-phase synthesis. Then a stable colloidal ink composed of CZTS nano-crystalline was blade coated on Mo-coated substrates followed by an annealing process under Ar atmosphere. After CZTS films formation, the films were sintered into CZTSSe absorber films by exposing them under Selenium vapor. The formation of a kesterite type CZTS was confirmed using X-ray diffraction and Raman scattering measurements. The band gap of CZTSSe absorber films was determined to be 1.26 eV, which was appropriate for use as an absorber layer in thin film solar cells. The CZTSSe absorber films showed a good photovoltatic performance, demonstrating this simple approach had great potential for CZTSSe solar cell production.
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高影响因子
Energies
·
2024
·Vol. 17
·期 2
·404
·
IF 3
Yin Chen,Zhenli Tang,Xiaofeng Weng,Min He,Sheng Zhou,Ziqiang Liu,Tao Jin
The open-circuit fault in electric vehicle charging stations not only impacts the power quality of the electrical grid but also poses a threat to charging safety. Therefore, it is of great significance to study open-circuit fault diagnosis for ensuring the safe and stable operation of power grids and reducing the maintenance cost of charging stations. This paper addresses the multidimensional characteristics of open-circuit fault signals in charging stations and proposes a fault diagnosis method based on an improved S-transform and LightGBM. The method first utilizes improved incomplete S-transform and principal component analysis (PCA) to extract features of front- and back-stage faults separately. Subsequently, LightGBM is employed to classify the extracted features, ultimately achieving fault diagnosis. Simulation results demonstrate the method’s effectiveness in feature extraction, achieving an average diagnostic accuracy of 97.04% on the test dataset, along with notable noise resistance and real-time performance. Additionally, we designed an experimental platform for diagnosing open-circuit faults in DC charging station and collected experimental fault data. The results further validate the effectiveness of the proposed method.
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高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Ling Meng,Zhaoxia Sun,Guanghang Sun,Xiting Zhang,Meng Dan,Jin Long,Jian Hu
Herein, we reported that KOH impregnation can generate a large number of porous structures with fruitful nitrogen self-doped groups during the carbonized process for poly (p-phenylene terephthalamide) fiber and poly (p-phenylene benzobisoxazole) fiber (denoted as PPTA and PBO, respectively). The intrinsical insulation, volume change, and shuttle effect of polysulfides then can be more significantly improved for the PBO-coated separator than the PPTA case. The discharge capacity primary achieves 1,322 mA h/g, which retains 827 mA h/g even after 200 cycles at 0.2 C for the cell with PBO-coated separator. The reversible specific discharge capacity maintains 841 mA h/g with a Coulomb efficiency of 99.7% at 5 C. The nitrogen self-doped nanocarbon particles are etched by KOH with the simple one-step preparation, which has promising application as Li-S battery cathode.
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高影响因子
RARE METALS
·
2024
·Vol. 43
·期 5
·1999-2014
·
IF 9.6
Li Mei,Wang Jing-Zhi,Jin Zhi-Liang
In the process of photocatalytic water cracking, the migration rate and utilization rate of photogenerated charges determine the hydrogen evolution performance of the catalyst. In this paper, a carbon isotope superconducting material graphdiyne (GDY) is prepared by mechanical ball milling and introduced into the S-scheme heterojunction Zn 0.5 Co 0.5 S/MoS 2 inorganic system. In terms of hydrogen evolution kinetics, GDY acts as an electron bridge, not only accelerating the migration of photogenerated carriers but also improving the utilization of photogenerated charges. Morphologically, the large two-dimensional layer provides more loading and anchoring points for Zn 0.5 Co 0.5 S/MoS 2 , which increases the number of active sites. The ternary composite catalyst 20%GDY/Zn 0.5 Co 0.5 S/Mo 2 S (20-GCSM) generates 69.94 μmol of hydrogen (5 h) in triethanolamine solution. It is 2.97 and 1.80 times higher than Zn 0.5 Co 0.5 S and Zn 0.5 Co 0.5 S/MoS 2 , respectively. After the cyclic experiment, it still has stable hydrogen evolution performance after standing for 24 h (under dark conditions). In addition, the potential mechanism of photocatalytic hydrogen evolution is demonstrated through in-situ X-ray photoelectron spectroscopy. This work provides a reference for further research in the field of introducing carbon materials into photocatalytic systems and improving the utilization of photogenerated charges. Graphical abstract
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 41
·15638-15646
·
IF 8.067
Xiang Li,Xinghuan Hu,Hua Liao,Shuai Yang,Xinyu Li,Qiulian Li,Xin Liu,Yonggang Zhao,Shurong Wang
In this study, a simple and reproducible two-step annealing process was demonstrated to prepare Cu2ZnSn(S,Se)4 (CZTSSe) thin film with band-gap grading by selenization followed by post-sulfo-selenization (PSS) treatment. The effects of PSS treatment on the composition and electrical properties of the CZTSSe thin film were investigated. The crystal structure, surface morphology, surface roughness and element composition of the CZTSSe thin film were characterized by GIXRD, SEM, AFM and EDS tests. The composition of elements at different depths of the thin film was also investigated. It was confirmed that CZTSSe thin film with high sulfur element content on the surface and low at the bottom were obtained after PSS treatment. The electrical performance of the CZTSSe solar cells was measured by Hall test, EQE and J–V. The results showed that the power conversion efficiency (PCE) of the CZTSSe thin film without PSS treatment was only 7.62%, while the PCE of the CZTSSe thin film after PSS treatment increased to 10.11%.
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高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Qifang Zheng,Peilun Shen,Yuqiang Mao,Liuyang Dong,Dianwen Liu
Arsenopyrite is commonly found in pyrite concentrates. High-temperature pyrometallurgy produces highly toxic arsenic vapor, while hydrometallurgy generates arsenic-containing wastewater. Flotation is an effective pretreatment method for arsenic removal. This study investigated the selective depression behavior and mechanism of D-penicillamine (DP) on arsenopyrite flotation. Single-mineral and artificial mixed-mineral tests revealed that at a DP concentration of 7 × 10 –4 mol/L, the mixed concentrate had As grade and recovery of 7.34 % and 17.40 %, respectively. This indicates the selective depressive effect of DP on arsenopyrite, enabling effective flotation separation from pyrite. DP adsorption significantly reduced the hydrophobicity of the arsenopyrite surface, with minimal impact on pyrite. Columnar adsorption peaks were observed on the arsenopyrite surface. This suggests coordination between the N and S atoms of DP molecules and the As sites on the arsenopyrite surface, forming N–As and S–As complexes. A hydrophilic film approximately 11.03 Å thick formed on the arsenopyrite (001) surface, which hindered further collector adsorption. This study provides a green and pollution-free approach for the flotation separation of S–As.
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高影响因子
Journal of Hazardous Materials Advances
·
2026
·
IF 9.1
Arif Nawaz,Jalwa Afreeq,Zhao Linke,Adnan Khan,Haifa Zhai,Nisar Ali,Rayya Ahmed Al Balushi,Mohammad M. Al-Hinaai,Thuraya Al-Harthy
Construction of solar energy harvesting chalcogenides heterojunctions could reign as photocatalysts due to significant chemical modulation and transformations with light irradiation. However, for significant utilizations of light, band gap engineering, charge carrier separation/transfer, and stability of selenides are leftovers challenges. Inspired by this, in the forefront a novel promising, eco-friendlier, and efficient visible light responsive piezoelectric built-in interface (ZnSe@Sb 2 Se 3 ) heterojunction was successfully constructed. Characterizations as HR-TEM, SEM, Raman, XPS, XRD, etc. confirmed the optimized coupling of Sb 2 Se 3 /ZnSe built-in interfaces. The shape, crystallinity and d-spacing of synthesized heterojunction deduced from HR-TEM, SAED, SEM and XRD are in agreement and further strengthen the confirmation of optimized heterojunction formation. The resulted intimate heterojunction were applied for photocatalysis of cefixime (Cf) and Cr 6+ reduction. The piezo induce carriers acts as a center to stabilize intrinsic point defects and dangling bonds at grain boundaries hence improve photocatalytic performance. The X-ray photoelectron study and experimental results reveal the great photocatalytic potential of heterojunction reflected by higher redox capacity and extraordinary light harvesting of the built-in interface, synergizing piezo-photo charge carrier separation/transfer via S-scheme charge transfer. It is revealed that the hole in heterojunction was generating reactive oxygen species (ROS), primarily responsible for the photocatalysis of contaminants. These statistical parameters demonstrate the suitability of the proposed model and experimental data.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Jiajia Wu,Shijie Yang,Guanhong Lu,Xiao Wang,Jing Sun
Efficient photocatalytic abatement of volatile organic compounds (VOCs) critically relies on effective separation of photogenerated electron-hole pairs and the generation of reactive oxygen species (ROS). Constructing S-scheme heterojunctions is an effective strategy to promote charge separation while preserving strong redox potentials. Herein, WO 3 /MIL-100(Fe) composites featuring interfacial Fe-O-W bonds were synthesized via a one-pot hydrothermal method for photocatalytic degradation of gaseous toluene. The optimized 15%WO 3 /MIL-100(Fe) heterojunction exhibits a 1.3-fold enhancement in toluene removal efficiency (52.6%) and twice the CO 2 conversion rate relative to pristine MIL-100(Fe), along with enhanced degradation for o-xylene and styrene, demonstrating broad-spectrum applicability. The interfacial internal electric field (IEF) in WO 3 /MIL-100(Fe) promotes efficient charge carrier separation and accelerates electron transfer. The S‑scheme heterojunction directs the reductive electrons in the MIL-100(Fe) conduction band and oxidative holes in the WO 3 valence band to generate superoxide radicals (•O 2 ⁻) and hydroxyl radicals (•OH), respectively, enabling efficient ring opening and deep degradation. Moreover, the load of WO 3 enhances Lewis acidity and introduces additional adsorption sites, strengthening the interaction with toluene. This work highlights the rational design of MOF-based S-scheme heterojunctions for durable volatile organic compound abatement.
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高影响因子
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