OPTICAL MATERIALS
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2020
·
IF 2.779
Guonan Cui,Yanchun Yang,Ruilan Chen,Chengjun Zhu
Cations substitutions are known to make much significant contribution on achieving the high-quality kesterite Cu 2 ZnSn(S,Se) 4 thin films . And the optimal ratios of Mn, Ni and Co substitutions are reported to be ~0.05, belong to the low doping to reduce their defect density , which looks like to some extent the effect of Na doping. In this study, learning the research experience of alkali metal doping, we introduced the extra trace Mn 2+ ion into the precursor solution without affecting the compositions of other elements (i.e. Cu, Zn, and Sn), and the effect of trace addition on properties of the absorber layer was also studied. It was discovered that crystalline, electrical properties, and hole carrier concentration of Cu 2 ZnSn(S,Se) 4 thin films increased with an increase of Mn incorporation, and the best doping ratio of Mn/(Cu + Zn + Sn) was considered to be 0.03. In addition, the effect of extra trace Mn-doping on the film thickness and elemental compositions of Cu 2 ZnSn(S,Se) 4 absorber layer were studied in detail.
研究领域:
材料科学
·
半导体物理
·
薄膜制备
·
光伏材料
·
固体化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 11
·990
·
IF 2.8
Liu Hongmei
The high energy density made lithium–sulfur batteries as the most promising energy storage devices. However, the poor cycle stability, which results from the severe polysulfide migration during the electrochemical cycles, inhibited the wide application of lithium–sulfur batteries. It has been proved that inhibiting the polysulfide shuttle effect and accelerating the polysulfide conversion could enhance the electrochemical performance of sulfur cathodes. Herein, hierarchically porous carbon/titanium dioxide (HPC/TD) composites are designed as sulfur host to adsorb the polysulfide and accelerate the redox conversion during cycling. Therefore, the polysulfide migration is effectively inhibited. The developed HPC/TD@S cathodes exhibit initial high capacity of 1256 mAh/g at 0.1 C. These results confirm that the accelerated redox conversion of polysulfide is beneficial for improving the electrochemical performance of Li–S batteries.
研究领域:
储能
·
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Bianbian Wang,Zhongnan Guo,Fan Sun,Jun Deng,Jiawei Lin,Dan Wu,Wenxia Yuan
Investigation on the magnetic interaction in Fe-based ThCr 2 Si 2 -type compounds is very important not only for understanding the structure-property relationship in this family but also for exploring the superconducting mechanism in related materials. In this work, we report the synthesis and physical properties of two new Fe-based chalcogenides KFeAgSe 2 and KFeAgS 2 . These two compounds adopt ThCr 2 Si 2 -type structure with I 4/ mmm space group and contain the Fe/Ag mixed occupation in the centre of edge-sharing Fe/AgCh 4 tetrahedron (Ch = Se, Te). The lattice parameters are refined to be a = 4.1866(2) Å, c = 13.7731(4) Å and a = 3.9845(3) Å, c = 13.3610(4) Å for KFeAgSe 2 and KFeAgS 2 respectively. Both two compounds show semiconducting behavior with electrical resistivity increased as the temperature decreased, while the resistivity of KFeAgS 2 is much larger (~61 Ω cm at room temperature) than that of KFeAgSe 2 (~2.5 Ω cm at room temperature). Most interestingly, despite the similar electronic structure of these two compounds, KFeAgSe 2 features a long-range antiferromagnetic order below 26 K while KFeAgS 2 shows a spin-glass state below 19 K. It is indicated that the long-range magnetic ordering can be suppressed in these ThCr 2 Si 2 -type transition metal chalcogenides via compressing the unit cell, that is to say, by chemical pressure. Our work not only gives a new sight to understand the structure-magnetism relationship in ThCr 2 Si 2 -type transition metal chalcogenides , but also provides clue to explore the mechanism of superconductivity in Fe-based family.
研究领域:
凝聚态物理
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材料科学
·
磁性与磁性材料
·
超导
·
无机化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Gang Wang,Wangen Zhao,Yong Cui,Qingwen Tian,Shang Gao,Lijian Huang,Daocheng Pan
Homogeneous molecular precursor solutions are excellent choices for obtaining smooth absorber layers, and they offer the potential to significantly lower the manufacturing cost of solar cells. Here, we present a thermally degradable metal butyldithiocarbamate-based solution approach to fabricate Cu2ZnSn(S,Se)4 solar cells. Low-cost Cu2O, ZnO, and SnO were used as the starting materials and were dissolved in the ethanol solution of butyldithiocarbamic acid. By tuning the composition of the Cu2ZnSn(S,Se)4 thin film, a power conversion efficiency of 6.03% on the basis of the active area has been achieved.
研究领域:
材料科学
·
光伏技术
·
薄膜技术
·
可持续能源
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Shengnan Xu,Yu Yu,Fuxin Wang,Jiande Hu,Zixiang Li,Guojun Lv
Cobalt-doped zeolite catalysts have been identified as a potentially viable non-precious metal alternative for toluene oxidation, exhibiting characteristics reminiscent of noble metals, such as the ability to activate C-H bonds, abundance, and minimal adverse environmental impact. However, the catalytic activity is greatly reliant on the diversity of cobalt species embedded within the zeolite framework. To address this, a ligand-engineering strategy was utilized to precisely control the coordination environment of the cobalt precursor, thereby regulating the resulting cobalt species and accordingly the catalytic activity of cobalt-doped zeolite catalysts. Four distinct Co@S-1 zeolites were synthesized with disparate ligands including ethylenediamine, water, ammonia water and acetylacetone, and meanwhile applied as heterogeneous catalysts for the selective oxidation of toluene with molecular oxygen as oxidant. Among them, the Co@S-1(EDA) zeolite catalyst synthesized with ethylenediamine demonstrated superior catalytic reaction performance, achieving a toluene conversion of 63.8 % with a benzaldehyde selectivity of 68.5 % within 6 h of reaction. This eminent catalytic oxidation ability for Co@S-1(EDA) zeolite catalyst is mainly ascribed to its largest Co 2+ /Co 3+ ratio, its most oxygen vacancy amount and its largest external surface area. Furthermore, the Co@S-1(EDA) zeolite catalyst exhibited excellent re-usability, maintaining its activity over five consecutive catalytic cycles. This study emphasizes ligand engineering as an effective approach to create highly efficient and stable cobalt-based zeolite catalysts for selective hydrocarbon oxidation reactions.
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DOI
高影响因子
Environmental Science-Nano
·
2026
·
IF 5.1
Fengyang Jing,Shimeng Chang,Xingyu Zhang,Chen-Liang Zhou,Yao Weng,Xuewei Li,Hongmei Ye,Yuting Sun,Jiuyang Lin,Wenyuan Ye,Wenjing Yuan
In this study, double S-scheme heterojunctions were constructed by a simple hydrothermal and calcination method, accompanied by the special layered structure of BiOIO3 employed for its I- modification. This resulted in the formation of CeO2/[Bi6O6(OH)3](NO3)3·1.5H2O (BHN)/I--BiOIO3, which possesses double S-scheme heterojunctions. The improvement of photocatalytic degradation efficiency is derived from the result of the synergistic effect of double S-scheme heterojunctions and I- modification. In photocatalytic degradation experiment with norfloxacin as the target pollutant, the degradation efficiency of typical sample (CeO2/BHN/I--BiOIO3-2) reaches 97.50%, which is 9 times and 1.6 times than that of pure CeO2 and BHN/BiOIO3, respectively. Obviously, the CeO2/BHN/I--BiOIO3 double S-scheme heterojunctions significantly enhances its photocatalytic degradation ability of antibiotics in comparison to single-substance photocatalysts and simple two-phase composite. It is noteworthy that the CeO2/BHN/I--BiOIO3 double S-scheme heterojunctions are also capable of achieving a degradation rate of up to 70% for norfloxacin in river water. Furthermore, this double S-scheme heterojunctions demonstrate the degradation efficiencies of approximately 90% for quinolone antibiotics, including ofloxacin, enrofloxacin, ciprofloxacin, and norfloxacin. This research offers a novel approach to enhance the photocatalytic degradation of organic pollutants through double S-scheme heterojunctions and elemental modification.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2026
·
IF 2.9
Zuo Guangling,Ye Hongyong,Du Jia,Ding Xin
An S-scheme Ag/CdS/Fe 2 O 3 (Ag/CS/FO) heterojunction was fabricated via a sequential solvothermal and photodeposition method. The microstructure and optoelectronic properties of the synthesized ternary composite were verified by a series of characterization methods. The transfer of photogenerated electron–hole pairs (e − /h + pairs) follows an S-scheme pathway, driven synergistically by the interfacial electric field (IEF) and band bending. That directs electrons (e − ) to the conduction band (CB) of CdS (CS) and holes (h + ) to the valence band (VB) of Fe 2 O 3 (FO), achieving efficient e − /h + pairs separation while maintaining high redox capabilities. Additionally, the incorporated Ag nanoparticles enhance visible-light harvesting via the surface plasmon resonance (SPR) effect and function as electron-transfer bridges, collectively promoting charge migration. Consequently, the composite exhibits high photocatalytic activity, degrading 98.68% of amoxicillin (AMX) under visible light. It also maintains 91.6% efficiency after four cycles, confirming sound stability. Notably, the material demonstrates superior performance in real-life water matrices (tap and river water), highlighting its strong application potential. Graphical abstract
The alternative text for this image may have been generated using AI.
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DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Shang Dong,Ju Xiaocheng,Jia Feiyang,Pan Yuede,Muhammad Naik,Zhang Guoli,Yang Zhewei,Li Gang,Wang Congwei
This work reports the preparation of N/S co-doped titanium dioxide (N/S-TiO 2 ) via in-situ sulfur doping assisted by alkaline hydrolysis followed by subsequent nitrogen doping and the lithium storage application. TiCl 4 is used as the titanium source, and sodium sulfide (Na 2 S) solution provides the alkaline hydrolysis environment and sulfur source, thus enabling the synthesis of S doped anatase TiO 2 (S-TiO 2 ). Urea is applied as the nitrogen source under high-temperature annealing, resulting in N/S co-doped anatase TiO 2 (N/S-TiO 2 ) materials. In addition, oxygen vacancies, which might enhance the electronic/ionic conductivity, is created. Consequently, N/S-TiO 2 (10:1) exhibits excellent rate performance (85.6 mAh g − 1 at 20 C) and long-term cycling stability (116.22 mAh g − 1 after 1500 cycles at 3 C). Further analysis using cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT), and electrochemical impedance spectroscopy (EIS) shows an enhanced pseudocapacitive contribution, increased lithium-ion diffusion coefficient, and reduced charge transfer resistance. These findings provide new insights for developing high-performance, structurally tunable metal oxide anode materials.
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125215
·
IF 7.5
Song Hou,Ruonan Guo,Yan Zhang,Shengwang Gao,Changsheng Guo,Jian Xu
BiOBr/ZnFe 2 O 4 couples visible-light bisphenol S (BPS) removal with magnetic recovery. • BPS removal at 60 min ranged from 69.2% to 99.0% across four spiked water matrices. • Scavenger and probe tests support oxygen-dependent and radical-mediated oxidation. • BPS removal remained at 95% in the fifth cycle after methanol regeneration. • Residual acute toxicity persisted after near-complete parent BPS removal. Bisphenol S (BPS) removal was investigated using a magnetically recoverable BiOBr/ZnFe 2 O 4 composite under visible-light irradiation. Among four nominal feed mass ratios, ZnFe 2 O 4 :BiOBr = 1:4 gave the highest activity, achieving 97.1% BPS removal within 40 min at a catalyst dose of 1.0 g L −1 and an initial BPS concentration of 5 mg L −1 . Its apparent rate constant of 0.091 min −1 was approximately 2.0 and 14.2 times those of pristine BiOBr and ZnFe 2 O 4 , respectively. The composite exhibited a saturation magnetisation of 28.8 emu g −1 , with visible magnetic clarification by 30 s. Removal at 60 min decreased from 99% to 95% over five cycles involving methanol washing without catalyst replenishment, while the principal crystalline phases were retained. Scavenger responses and terephthalic-acid probe fluorescence supported oxygen-dependent and radical-mediated oxidation. Across four BPS-spiked water matrices, 60-min removal ranged from 99.0% in distilled water to 69.2% in wastewater-treatment-plant effluent. Aliivibrio fischeri luminescence inhibition rose from 13.32 ± 1.17% initially to a highest sampled mean of 31.37 ± 2.70% at 20 min and declined to 22.39 ± 1.36% at 90 min (mean ± standard deviation, n = 3), showing persistent residual acute toxicity despite parent-compound removal. The results demonstrate the combined benefits of visible-light activity and magnetic recoverability, while identifying water-matrix inhibition and residual toxicity as constraints on further process development.
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高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Wanling Mao,Siyong Wang,Li Zhang,Yujia Luo,Yuyao Feng,Yunhai Xiong,Yixuan He,Yuhui Dong,Yousheng Zou,Haibo Zeng
Low-toxicity quantum dots (QDs) based on group I-III-VI elements have attracted significant interest due to their color-tunability for wide-gamut displays. Nevertheless, the width of the blue-emitting peak remains considerably broader than those of the green and red counterparts, resulting in degraded color purity, restricted gamut coverage, and diminished energy efficiency in blue-emitting devices. Here, we report spectroscopically pure blue QDs (λ = 465 nm) with an ultranarrow FWHM of 36 nm, achieving excellent color purity for blue-emitting I-III-VI QDs. Employing a two-step hot-injection method with precise thickness control, this approach enables epitaxial growth of an atomically thin 0.35 nm thick AgGaS 2 (AGS) shell on Ag-In-Zn-Ga-S cores. Using in situ HRTEM on systematically synthesized AIZGS@AGS architectures, we directly captured the controlled epitaxial growth of this shell, revealing a clean core–shell interface. The high-crystallinity AGS shell passivates surface defects, narrowing the PL spectrum from 103 to 36 nm. Moreover, systematic In:Zn ratio tuning further affords AIZGS@AGS QDs that exhibit narrow linewidths and continuous spectral coverage across the blue region (465–509 nm). Our study provides an effective approach for high-quality I-III-VI blue QDs, demonstrating significant potential for advanced display applications.
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产品关联
DOI
高影响因子
Small
·
2026
·
IF 11.8
Kunge Hou,Ran Sun,Longbo Chang,Guocheng Liu,Xingang Liu,Jianyuan Hou,Renxi Zhang
Photocatalytic hydrogen peroxide (H 2 O 2 ) production has traditionally been dominated by a single reaction pathway, namely the oxygen reduction reaction (ORR). However, this approach is limited by low efficiency and a dependence on sacrificial agents. In this study, we introduce a pioneering radiofrequency plasma-assisted strategy for constructing an S-scheme heterojunction composed of g-C 3 N 4 and a triazine-based covalent organic framework (COF). This novel heterostructure enables simultaneous dual-channel H 2 O 2 generation via both the ORR and water oxidation reaction (WOR) under visible light without sacrificial reagents. The optimized composite, gTD-30, achieves a remarkable H 2 O 2 production rate of 2017 µmol g −1 h −1 in pure water, thus surpassing the performance of the individual components g-C 3 N 4 and TaPPY-DHTA (TD)-COF by 10.9 and 3.6 times, respectively. This composite also exhibited outstanding stability over multiple cycles in diverse aqueous environments. Using advanced characterization techniques and theoretical modelling, we demonstrated that plasma treatment not only enhanced the interfacial contact but also induced a strong internal electric field and band alignment, thereby unlocking exceptional charge separation and redox capability. This study establishes a new paradigm for photocatalytic H 2 O 2 synthesis by merging dual-reaction engineering with interface-specific plasma modification and opens a scalable route toward efficient solar-driven oxidant production.
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DOI
PubMed
高影响因子
Solar RRL
·
2026
·Vol. 10
·期 9
·e70362
·
IF 4.8
Yingjun Zhou,Chuanhe Ma,Shulei Liang,Yujun Li,Hailong Wang
In Cu 2 ZnSn(S, Se) 4 (CZTSSe) solar cells, the conventional magnetron-sputtered ZnO (ZnO-SP) suffers from high cost, low efficiency, and interface damage. This study systematically compares sol–gel ZnO (ZnO-SG) and 18C6 crown ether-modified sol–gel ZnO (ZnO-SG-18C6) as interfacial layers. X-ray diffraction (XRD), scanning electron microscope (SEM), AFM, and X-ray photoelectron spectroscopy (XPS) show ZnO-SP has a uniform hexagonal wurtzite structure, whereas ZnO-SG displays an amorphous fibrous morphology with bright/dark striations. Both exhibit similar UV absorption peaks, but ZnO-SG shows broader absorption and double-exponential decay. Density–voltage ( J – V ) tests reveal that ZnO-SG-18C6 increases PCE from 8.5% to 10.6%, surpassing the 9.5% achieved with ZnO-SP. Electrochemical impedance spectroscopy (EIS) analysis shows that the ZnO-SG-18C6 layer reduces carrier recombination, with the charge transfer resistance ( R ct ) increasing by 30%. Transient photocurrent measurements further reveal that it enhances the photocurrent response, achieving a 1.8-fold increase in the peak, which rises to four times under a 70% high duty cycle.This work demonstrates ZnO-SG-18C6 as a low-cost, high-efficiency alternative to ZnO-SP in CZTSSe solar cells.
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高影响因子
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