CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qiubo Lan,Jinxu Ma,Siyuan Li,Kepi Chen,Cuiwei Li,Linan An
Since high-entropy oxide has a huge compositional space, it is urgent to develop efficient methods to quickly find the compositions that can form single-phase materials. In this paper, taking (Ce, Zr, Hf, Yb, Nb)O 2 system as an example, we carried out the design and preparation of high-entropy fluorite oxides (HEFOs) by constructing a R ‾ -S diagram. Three single-phase HEFOs have been successfully design and synthesized. The impedance measurement showed that the three materials are electronic conductors, which exhibited relatively low thermal conductivities ranging between 1.6 W/m·K ∼1.9 W/m·K. The current study suggests that R ‾ -S diagram is a useful tool for quickly selecting compositions that can form single-phase high-entropy oxides.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Xuejian Xing,Li Huang,Shaojing Zhao,Jiafu Xiao,Minhuan Lan
S,N-doped carbon dots (S,N-CDs) were facilely prepared via a hydrothermal method by using thiourea and citric acid (CA) as precursors. The as-prepared S,N-CDs exhibited high stability in aqueous solution and were applied for fluorometric detection of tetracyclines (TCs). The approach was developed on the basic of the fluorescence of S,N-CDs at 440 nm, which was selectively quenched by TCs through the inner filter effect (IFE) mechanism. Moreover, the fluorescence of TCs with maximum at 600 nm could be used as the internal standard signal, resulting in a fluorometric spectral response. The limit of detection (LOD) was 0.25, 0.39 and 0.26 μM for tetracycline (TC), doxycycline (DC) and oxytetracycline (OTC), respectively. Furthermore, S,N-CDs were successfully utilized for the detection of residual TCs in fish and pork samples with acceptable recovery and good RSD.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qiang Li,Lijie Wang,Jupu Song,Linshen Zhang,Chunfeng Shao,Hong Li,Hemin Zhang
Construction of heterojunction photocatalysts is a valid tactics to boost the photocatalytic property of catalyst. Herein, a novel S-scheme heterojunction of zero/three dimensional (0D/3D) In 2 S 3 /Bi 2 WO 6 hybrid catalyst was obtained by assembling In 2 S 3 nanoparticles on floriated shaped Bi 2 WO 6 microsphere through a simple precipitation route for the first time. The morphology, structures, composition, chemical and optical properties of the resulting materials were carefully researched through various instruments. The degradation experiments revealed that In 2 S 3 /Bi 2 WO 6 composites exhibited superior photocatalytic behavior for dyes decomposition. The optimized In 2 S 3 /Bi 2 WO 6 composite showed remarkable photocatalytic decomposition Rhodamine B (RhB) and Methylene blue (MB), 16.0 (2.68)-fold and 70.3 (1.66)-fold larger than that of pristine Bi 2 WO 6 (In 2 S 3 ), and it also possessed good stability and reusability. The largely improved photoactivity may derive from the formed S-scheme heterojunction between Bi 2 WO 6 and In 2 S 3 , which accelerated photocarriers disassociation and retained strong redox power. Liquid chromatography-mass spectrometry (LC-MS) was applied to reveal the RhB decomposition pathway. Besides, the S-scheme charge transfer mechanism was well elucidated based on in-situ X-ray photoelectron spectroscopy analysis, density functional theory calculation (DFT), and trapping experiment along with electron paramagnetic resonance (EPR) tests.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Long Sun,Lingling Li,Juan Yang,Jiajie Fan,Quanlong Xu
The fabrication of S-scheme heterojunctions has received considerable attention as an effective approach to promote the separation and migration of photoexcited electron/hole pairs and retain strong redox abilities. Herein, an imine-based porous covalent organic framework (COF-LZU1) is integrated with controllably fabricated CdS hollow cubes, resulting in the formation of an S-scheme heterojunction. When the COF content reaches 1.5 wt%, the COF/CdS heterostructure (1.5%COF/CdS) achieves the highest hydrogen generation rate of 8670 μmol·h –1 ·g –1 , which is approximately 2.1 times higher than that of pure CdS. The apparent quantum efficiency (AQE) of 1.5%COF/CdS is approximately 8.9% at 420 nm. Further systematic analysis shows that the intimate contact interface and suitable energy band structures between CdS and COF can induce the formation of an internal electric field at the heterojunction interface, which can effectively drive the spatial separation of photoexcited charge carriers and simultaneously maintain a strong redox ability, thus enhancing the photocatalytic H 2 evolution performance.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenhui Fang,Tingting Tang,Min Li,Shixian Xin,Ying Wu,Yutao Cao,Zhize Yu,Wei Cui,Zengxi Li,Hong Zhao
Designing catalysts at atomic level fine-tune the electronic structure of surface-active site for efficient water splitting, is a highly desirable approach but also poses significant challenges. This study focuses on the synthesis of a series of electronically tunable metal single-atom (M−SAs) catalysts: M 9 @S-Ni(OH) 2 (M=Pt, Mn, Fe or Cu). Experimental results reveal that introduction of trace S-heteroatoms and metal atoms into Ni(OH) 2 lattice can effectively modulate the electronic structure of M 9 @S-Ni(OH) 2 through modulation of p-d and d-d orbital hybridization, resulting in exceptional performance in water electrolysis. Among M 9 @S-Ni(OH) 2 , Pt 9 @S-Ni(OH) 2 and Fe 9 @S-Ni(OH) 2 exhibit excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance, respectively, the overpotential requiring only 7 mV and 269 mV, respectively, at current density of 10 mA cm −2 . (−) Pt 9 @S-Ni(OH) 2 ||Fe 9 @S-Ni(OH) 2 (+) presents a high current density of 531.07 mA cm −2 at cell-voltage of 1.80 V in overall-water splitting (OWS), which is 14.07 times higher than that of the commercial (−) Pt/C||IrO 2 (+) (37.86 mA cm −2 ) system. This work achieves the development of cost-effective and stable electrocatalysts, offering a solution for large-scale and sustainable water-hydrogen conversion.
研究领域:
催化
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材料科学
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电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
IF 4.8
Ying Zhang,Qinqin Wang,Mingyuan Zhu,Bin Dai
The prevailing Zn/AC catalysts was plagued by limited lifetime and difficulties in regeneration for acetylene acetoxylation. In order to exploring renewable catalyst for acetylene acetoxylation, Zn/S-1 catalyst was synthesized using Silicalite-1(S-1) as support. The catalytic performance of Zn/S-1 was compared with Zn/AC catalyst using active carbon as support. The CH 3 COOH conversion of Zn/S-1 catalyst only decreased 15 % after running 225 h, much better than the 66 % of Zn/AC after 154 h. TG analysis revealed that the improved stability of Zn/S-1 catalyst was attributed to its better resistance for carbon deposition with the presence of S-1 support. A series of characterizations and DFT results elucidated that the Lewis acid sites of S-1 support and Zn component serve as dual active sites, which enhanced the adsorption of CH 3 COOH and inhibited the carbon deposition. In addition, the deactivated Zn/S-1 catalyst could be regenerated by calcination in air atmosphere due to the thermal stability of S-1, and the regenerated Zn/S-1 catalyst showed similar catalytic activity with the fresh catalyst.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Tong Dou,Jinqing He,Shuteng Diao,Yiping Wang,Xuhui Zhao,Fazhi Zhang,Xiaodong Lei
As the “emission peak and carbon neutrality peak” are proceeding all over the world, CO 2 electroreduction is studied extensively as it is a powerful way to transform CO 2 into value-added products. The earth-abundant Sn-based materials and copper sulfides as electrochemical catalysts have shown activity for generating formate from CO 2 electroreduction. Herein, the composite of CuS and S-doped SnO 2 (CuS/SnO 2 -S) was synthesized by a redox reaction under room temperature. The unique structural reconstruction of CuS/SnO 2 -S nanoparticles to Cu/Sn/Cu 6.26 Sn 5 nanowires decreases the energy barrier of the adsorption of CO 2 , and increases the adsorption of *H, primarily suppressing the competing reaction of hydrogen evolution reaction (HER). As a result, at − 0.8 V vs. RHE , it reaches an electrochemical CO 2 -to-formate conversion with a Faradaic efficiency (FE) of 84.9% at a yield of 8860 µmol h −1 cm − 2 under a partial current density of ∼18.8 mA cm − 2 in an H-type reactor. This study provides significant insight into the structural evolution of the CuSn sulfides and the mechanism of formate formation.
研究领域:
材料科学
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电化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Xenobiotics
·
2024
·Vol. 14
·期 2
·452-466
·
IF 6.8
Bingying Li,Yongsi Huang,Duan Pi,Xiang Li,Yafen Guo,Zhiying Liang,Xiaohong Song,Junjie Wang,Xuegeng Wang
Bisphenol S (BPS), one of the substitutes for bisphenol A (BPA), is widely used in various commodities. The BPS concentrations in surface water have gradually increased in recent years, making it a predominant bisphenol analogue in the aquatic environment and raising concerns about its health and ecological effects on aquatic organisms. For this study, we conducted a 96 h acute toxicity test and a 15-day developmental exposure test to assess the adverse effects of BPS exposure in Chinese medaka (Oryzias sinensis), a new local aquatic animal model. The results indicate that the acute exposure of Chinese medaka embryos to BPS led to relatively low toxicity. However, developmental exposure to BPS was found to cause developmental abnormalities, such as decreased hatching rate and body length, at 15 dpf. A transcriptome analysis showed that exposure to different concentrations of bisphenol S often induced different reactions. In summary, environmental concentrations of BPS can have adverse effects on the hatching and physical development of Chinese medaka, and further attention needs to be paid to the potential toxicity of environmental BPS.
研究领域:
环境科学
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毒理学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ming-Tao He,Peng Li,Yin-Hao Wang,Lei Du,Song Huang,Hai-Kui Zou,Guang-Wen Chu,Bao-Chang Sun
In this work, the synthesis of bisphenol S (4,4′-BPS) using reactive dehydration in a rotating packed bed (RPB) was studied. Firstly, orthogonal experiments were adopted to investigate the effects of different operating conditions on the yield and content of 4,4′-BPS in a stirred tank reactor (STR), including the mesitylene/phenol molar ratio ( μ ), reflux dehydration time ( t ), and stirring speed ( n ), in order to optimize the operating conditions in STR. Based on the study in STR, the effects of operating conditions, including rotation speed ( N ), feeding rate ( q ), and cycle number ( τ ), on the yield and content of 4,4′-BPS in RPB combined with STR (RPB-STR) were further investigated to optimize the operating conditions. The results indicated that compared to STR, the yield and content of 4,4′-BPS increased by 22.1% and 7.52% under the optimal operating conditions in RPB-STR, respectively. This work provides a novel route for efficient synthesizing 4,4′-BPS.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hong Fan,Lili Ai,Mengjiao Xu,Shumin Wu,Luxiang Wang,Chuan Tan
Photocatalytic synthesis of hydrogen peroxide is an emerging topic for solar-to-chemical energy conversion. ZnIn 2 S 4 /Bi 4 Ti 3 O 12 (ZIS/BTO) - based S-scheme heterojunction semiconductor photocatalysts were prepared via a one-pot water bath method. Under visible light irradiation, the optimum H 2 O 2 yield of ZIS/BTO-2 reaches 1102 µmol L −1 , which is 20.0 and 11.5 times higher than those of the pure phases of Bi 4 Ti 3 O 12 and ZnIn 2 S 4 , respectively. Experimental and density functional theory (DFT) calculations demonstrated that the Built-in Electric Field (IEF) present between the ZIS/BTO S-type heterostructures not only facilitated the transfer of photogenerated carriers to surface active sites, but also promoted the adsorption of molecular oxygen and the tuning of the energy band structure. This resulted in an enhancement of the efficiency of photocatalytic oxygen reduction reaction (ORR) and the water oxidation reaction (WOR) for the synthesis of H 2 O 2 . Hence, the present study provided a practical route for the efficient synthesis of H 2 O 2 over Bi 4 Ti 3 O 12 - based photocatalysts and disclosed the reaction mechanism, that is, a heterojunction with a high efficiency for H 2 O 2 synthesis.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Haodan Xu,Da Wang,Jun Ma,Tao Zhang,Xiaohui Lu,Zhiqiang Chen
In this paper, for the first time the spinel sulfide carrollite (CuCo 2 S 4 ) was applied to activate peroxymonosulfate (PMS) for the abatement of an endocrine disrupting compound (EDC) bisphenol S (BPS) in water. The hydrothermally synthesized CuCo 2 S 4 outperformed conventional cobalt and copper oxides/sulfides in both catalytic activity and stability (i.e. metal leaching) in this oxidation process. The spinel sulfide was most active under neutral pH conditions, which is preferred for water/wastewater treatment. Sulfate radicals (SO 4 − ) which was proved to be the prominent oxidant species in this oxidation process, attacked on BPS producing multiple hydroxylated degradation intermediates. Cu(II)/Cu(I) and Co(III)/Co(II) synergetic surface redox couples are found responsible for the catalytic activation of PMS producing SO 4 − ; furthermore, the thermodynamically favorable reaction between surface Cu(I) and surface Co(III) guarantees the electron transfer between the surface metal sites. As confirmed by turnover frequency calculation, CuCo 2 S 4 has higher catalytic effect per surface cobalt atom than the counterpart oxides for PMS activation, probably due to the lower electronegativity of S 2− than O 2− . CuCo 2 S 4 could be a potentially useful catalyst for water/wastewater treatment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jianle Wang,Xueming Liu,Hong Deng,Dongye Zhao,Qiulin Yang,Zhihua Zhu
Various sulfur- and iron-bearing materials have been shown promising for reductive immobilization of Cr(VI) in water and soil. Yet, composite Ca-Fe-S materials and the effects of water chemistry and material aging have not been investigated. In this work, we prepared a type of Ca-Fe-S microparticles under the atmospheric conditions through a facile one-pot approach, and tested the particles for reductive immobilization of Cr(VI) in solution and soil. Ca-Fe-S showed 40 % higher removal efficiency of Cr(VI) in solution than FeSO 4 and 10 % higher than CaS x on the basis of equal molar dosage. When a Cr-laden soil was amended by Ca-Fe-S, the leachable concentration of Cr per the toxicity characteristic leaching procedure remained below the regulatory limit of 5 mg L −1 after 730 days of curing, while FeSO 4 and CaS x failed to meet the regulatory threshold. Ca-Fe-S served as a slow-releasing source of Fe 2+ and S 2- , which were able to convert Cr(VI) into the stable final product of Cr(OH) 3 . Ca-Fe-S was able to perform well under a wide range of pH (3.0–9.0) and in the presence of high concentrations of coexisting ions (5 mmol L −1 of Cl - , SO 4 2- , or HCO 3 - ). Moreover, the material remained effective when aged under the atmospheric conditions for 14 days. This study showed that Ca-Fe-S is a highly effective material for efficient sequestration of Cr(VI) in soil and groundwater under various water chemistry and materials aging conditions.
研究领域:
环境科学
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土壤化学
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地下水污染治理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）