APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Xiaoying Xu,Shaofeng Dong,Jialong Lv,Guocheng Huang,Qiaoshan Chen,Jinhong Bi
The carrier transfer mechanism of S-scheme heterojunctions has been extensively explored, yet their impact on light absorption performance remains ambiguous. In this work, a finely designed S-scheme heterojunction was developed by coupling oxidation photocatalyst a specific covalent organic framework (COF)-TaTp, and reduction photocatalyst SnS 2 (SS) for in-situ H 2 O 2 photo-production and sterilization. The optimized 10% SS/TaTp achieved a 3.45- and 16.87-fold enhancement in H 2 O 2 generation than pure TaTp and SS, respectively, with significant improvements under visible and near-infrared (NIR) light. In-situ XPS, EPR, and Kelvin probe force microscopy (KPFM) verified the S-scheme charge transfer mechanism, underscoring accelerated photo-induced electrons migration and strengthened redox capacity. The internal electric field of 10% SS/TaTp was calculated to be 2.14 and 4.63 times stronger than TaTp and SS. Intriguingly, the electron localization function and partial density of states analyses revealed that the interfacial C-N-S covalent bonds finely tuned the energy band structure and generated hybrid energy levels in the heterojunction, thus improving light harvesting and catalytic performance in both visible-light and NIR region. This work highlights the role of interfacial covalent interactions in tuning energy levels in COF-based S-scheme photocatalysts.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Xin Wu,Chao Yan,Ying Hu,Junlei Tang,Xiuli Zhao,Mao Chen
Vitrimers are covalently crosslinked networks with dynamic bond exchange, where their dynamic behavior is typically regulated by adjusting network structures or incorporating fillers. This study introduces graphite flakes (GFs) into sulfur-containing. Vitrimers to investigate their effects on mechanical properties, stress relaxation, and thermal conductivity. The results demonstrate that adding 10 wt.% GFs increases tensile strength by 4.37% compared to pure epoxy vitrimer, while higher filler content reduces toughness and decelerates stress relaxation. At 160 °C, the characteristic relaxation time rises from 15.35 s (pure vitrimer) to 108.85 s (40 wt% GFs composite). The Arrhenius prefactor ( τ₀ ) decreases with GFs loading, whereas the activation energy ( E a ) remains nearly unaffected. Additionally, 40 wt.% GFs enhance thermal diffusivity by 110.17% due to oriented phonon transport channels. Chemical recycling via DTT solution achieves complete matrix degradation and filler recovery without damaging GFs. This study provided valuable insights for optimizing vitrimer composites, particularly in enhancing thermal conductivity and modulating dynamic properties.
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JOURNAL OF ORGANIC CHEMISTRY
·
2017
·
IF 4.849
Qiujie Tang,Zhaogang Bian,Wei Wu,Jin Wang,Ping Xie,Charles U. Pittman,Jr.,Aihua Zhou
The method for constructing C–S bonds is very important in organic synthesis. Here a new sulfenylation method to generate flavone thioether derivatives was developed by employing aromatic or alkyl halides, S powder and Na2S2O3 as reactants. Good yields of regioselective Calkyl–S and Caryl–S-substituted flavones were generated under relatively environmentally friendly and simple conditions. This method might be potentially applicable to large scale production, and it enriches current sulfenylation methods.
研究领域:
有机化学
·
药物合成
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Frontiers in Microbiology
·
2022
·
IF 6.064
Wu Xiaoyan,Han Ziyi,Liu Bingnan,Yu Dongming,Sun Jing,Ge Liangpeng,Tang Wenjie,Liu Shaojuan
Methionine (Met) metabolism provides methyl groups for many important physiological processes and is implicated in multiple inflammatory diseases associated with the disrupted intestinal microbiota; nevertheless, whether intestinal microbiota determines Met metabolism in the host remains largely unknown. Here, we found that gut microbiota is responsible for host Met metabolism by using various animal models, including germ-free (GF) pigs and mice. Specifically, the Met levels are elevated in both GF pigs and GF mice that mainly metabolized to S-adenosine methionine (SAM) in the liver. Furthermore, antibiotic clearance experiments demonstrate that the loss of certain ampicillin- or neomycin-sensitive gut microbiota causes decreased Met in murine colon. Overall, our study suggests that gut microbiota mediates Met metabolism in the host and is a prospective target for the treatment of Met metabolism-related diseases.
研究领域:
微生物学
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代谢生物学
·
医学
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Catalysts
·
2022
·Vol. 12
·期 12
·1625
·
IF 4.501
Bo Chen,Zhi-Ze Cao,Zhi-Jun Diao,Liang-Qiu Huang,Si-Jia Zhao,Hong Yuan,Jia-Meng He
Hydrogenolysis via targeted depolymerization of C–O linkages is a techno-economic beneficial process for converting lignin into highly valuable chemicals and clean fuels. In this work, a macroporous silicalite-1 (S-1) array-supported Ru-Ni metallic phosphide composite (Ru-Ni12P5/S-15) was prepared as a catalyst and hydrogenolysis activity under relative mild conditions was investigated using a series of compounds containing ether linkages as lignin-related model compounds. The Lewis acid sites originating from the unreduced Ru species and the macroporous geometry of S-1 significantly influenced hydrogenolysis activity and product selectivity. Analysis of the mechanism demonstrated that both the aryl ether and aliphatic ether linkages were directly hydrogenated over Ru-Ni12P5/S-15. 2D-HSQC-NMR spectroscopy demonstrated that the ether linkages of lignin were efficiently cleaved by Ru-Ni12P5/S-15. Furthermore, the obtained liquid hydrogenolysis products are high value-added chemicals used for pharmaceutical production and can be facilely tuned via the reaction conditions.
研究领域:
催化化学
·
可再生资源转化
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Bioresources and Bioprocessing
·
2022
·Vol. 9
·期 1
·1-14
·
IF 4.983
Hu Qiongyue,Zhang Tanglei,Yu Hongwei,Ye Lidan
The vitamin A component retinol has become an increasingly sought-after cosmetic ingredient. In previous efforts for microbial biosynthesis of vitamin A, a mixture of retinoids was produced. In order to efficiently produce retinol at high purity, the precursor and NADPH supply was first enhanced to improve retinoids accumulation in the S. cerevisiae strain constructed from a β-carotene producer by introducing β-carotene 15,15ʹ-dioxygenase, following by screening of heterologous and endogenous oxidoreductases for retinal reduction. Env9 was found as an endogenous retinal reductase and its activity was verified in vitro. By co-expressing Env9 with the E. coli ybbO , as much as 443.43 mg/L of retinol was produced at 98.76% purity in bi-phasic shake-flask culture when the antioxidant butylated hydroxytoluene was added to prevent retinoids degradation. The retinol titer reached 2479.34 mg/L in fed-batch fermentation. The success in selective biosynthesis of retinol would lay a solid foundation for its biotechnological production. Graphical Abstract
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Polymer Chemistry
·
2022
·Vol. 13
·期 10
·1328-1334
·
IF 5.364
Lihua Zhao,Tianhao Li,Bijie Wang,Ke Chen,Xiao Hu,Ming Liu,Liu He,Qing Huang,Yujie Song
Poly(siloxane–carborane)s are a class of polymeric materials which can be used for harsh environments. Poly(cyclosiloxane–carborane)s were prepared through the hydrosilylation of cyclosiloxanes and vinyl modified carboranes. The structure of the as-prepared carborane cyclosiloxane hybrid polymers (CcHPs) could be controlled through changing the ratio of monomers, and the CcHPs showed good thermal stability as well as anti-oxidation properties. The carbon fiber coated with CcHPs could resist high temperature in air, and only 10 wt% loss was observed at 1000 °C. The coated carbon foam could retain its shape and size after burning for 2 min, demonstrating the potential applications of CcHPs as protective coatings for harsh environments.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Danyang Liu,Miaomiao Jing,Qiang Zhao,Junli Wang,Zhifang Jia,Zuopeng Li,Kewei Wang,Yong Guo,Yuanzhen Ke
A novel S-scheme heterojunction N,S-NiFe-LDH/N-Bi₂MoO₆ was successfully constructed. • 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ showed the highest activity, degrading 86.3% of TC in 100 min under visible light. • Element doping and interface engineering synergistically enhanced visible-light absorption and charge separation. • ·OH and ·O₂ − were the dominant active species responsible for TC degradation. A step-scheme (S-scheme) heterojunction photocatalyst was constructed via a hydrothermal method, consisting of N,S co-doped NiFe layered double hydroxide (N,S-NiFe-LDH) and nitrogen-doped bismuth molybdate (N-Bi₂MoO₆). The morphology, crystal structure, optical properties, elemental valence states, and charge separation/transport performance of the composite catalyst were systematically investigated using various characterization techniques, including SEM, TEM, HRTEM, XRD, UV–Vis DRS, XPS, and EIS. Its photocatalytic activity was evaluated through tetracycline (TC) degradation experiments under visible light irradiation, and the catalytic mechanism was elucidated by EPR radical detection. The results showed that the incorporation of N,S-NiFe-LDH enhanced the photocatalytic performance of the composite catalyst. Among the tested samples, the 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ composite exhibited the highest degradation efficiency, achieving 86.3% TC removal within 100 min. The synergistic interaction between N,S-NiFe-LDH and N-Bi₂MoO₆ promoted the separation efficiency of electrons and holes, thereby significantly enhancing the photocatalytic activity.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yuanyuan Wang,Yin Zhang,Yuxin Zhang,Xinchen Li,Yancheng Gong,Yingfei Hu,Hangmin Guan
This research details the synthesis of an Ag/Ag₂S/ZnIn₂S₄ composite photocatalyst via the in-situ reduction of Ag/Ag₂S onto a flower-like ZnIn₂S₄ structure. The optimized 2%Ag/Ag₂S/ZnIn₂S₄ material displays augmented visible-light absorption spanning 500–800 nm, a photocurrent density 3.9-fold higher than pristine ZnIn₂S₄, and a more negative flat-band potential of −1.04 V versus Ag/AgCl. This composite achieves over 99% degradation of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) within 15 min (k = 0.2629 min −1 ) and 98.9% degradation of hexachlorobenzene (HCB) within 100 min (k = 0.0408 min −1 ), representing a degradation rate approximately 40 times faster than pure ZnIn₂S₄. To our knowledge, this is the fastest reported case to date of a visible-light-driven reductive dehalogenation reaction involving BDE-47 under similarly mild conditions, and its performance significantly outperforms that of ZnIn₂S₄ modified with Pd, Au, or Cu. Photogenerated electron-mediated mechanisms are confirmed through trapping experiments, and the catalyst exhibits robust stability across five reaction cycles. The accelerated degradation of BDE-47 is ascribed to its lower C Br bond energy (285 kJ/mol) compared to C Cl (327 kJ/mol) and enhanced hydrophobic adsorption. This study introduces a triple-synergy heterojunction approach for achieving ultrafast visible-light-driven reductive dehalogenation of halogenated persistent organic pollutants.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Chao-Ying Fan,Pin Xiao,Huan-Huan Li,Hai-Feng Wang,Lin-Lin Zhang,Hai-Zhu Sun,Xing-Long Wu,Hai-Ming Xie,Jing-Ping Zhang
In this work, the chemical interaction of cathode and lithium polysulfides (LiPSs), which is a more targeted approach for completely preventing the shuttle of LiPSs in lithium–sulfur (Li–S) batteries, has been established on the electrode level. Through simply posttreating the ordinary sulfur cathode in atmospheric environment just for several minutes, the Au nanoparticles (Au NPs) were well-decorated on/in the surface and pores of the electrode composed of commercial acetylene black (CB) and sulfur powder. The Au NPs can covalently stabilize the sulfur/LiPSs, which is advantageous for restricting the shuttle effect. Moreover, the LiPSs reservoirs of Au NPs with high conductivity can significantly control the deposition of the trapped LiPSs, contributing to the uniform distribution of sulfur species upon charging/discharging. The slight modification of the cathode with <3 wt % Au NPs has favorably prospered the cycle capacity and stability of Li–S batteries. Moreover, this cathode exhibited an excellent anti-self-discharge ability. The slight decoration for the ordinary electrode, which can be easily accessed in the industrial process, provides a facile strategy for improving the performance of commercial carbon-based Li–S batteries toward practical application.
研究领域:
储能技术
·
纳米材料
·
电化学
·
电池技术
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DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 7
·2258-2263
·
IF 4.174
Jin Wang,Shuang Wang,Jinping Li
In this study, we report sulfur-doped three-dimensional graphene (S-3DG) as a metal-free electrocatalyst for N2 reduction reaction (NRR) under ambient conditions. Due to the high electron transport capacity and stable physicochemical properties of 3DG, it was utilized to improve the NRR catalytic performance dramatically. Hence, in 0.05 M H2SO4 the S-3DG achieved a remarkably large NH3 yield of 38.81 μgNH3 mgcat−1 h−1 and a high faradaic efficiency of 7.72% at −0.6 V versus a reversible hydrogen electrode (RHE), which is superior to most non-metal catalysts. Notably, it shows such outstanding selectivity that no hydrazine by-products were detected and the electrochemical stability passed a long-term durability test.
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ADVANCED POWDER TECHNOLOGY
·
2019
·
IF 3.25
Kedir Ebrahim Ahmed,Dong-Hau Kuo,Worku Lakew Kebede
Heterojunction construction with low band gap materials is an effective way of utilizing UV light active materials under visible light irradiation. Here, we report the synthesis of Bi 2 (O,S) 3 /Zn(O,S) heterostructure using simple solvothermal method without surfactant. The catalysts were investigated with different characterization techniques. All the composite catalysts showed high light absorption capacity in the whole visible light spectrum. The catalytic activity of the catalysts was evaluated by Cr(VI) reduction. While pure Zn(O,S) catalyst showed no significant Cr(VI) reduction, higher photocatalytic activity than individual components were exhibited after heterojunction construction with Bi 2 (O,S) 3 . 20-BiZnOS catalyst with Bi/Zn molar percentage of 20% showed the best photocatalytic activity among the composites with 99.5% Cr(VI) reduction within 12 min under visible light irradiation. Heterojunction formation between Bi 2 (O,S) 3 and Zn(O,S) nanoparticle, and selective adsorption of Cr(VI) and desorption of Cr(III) on the surface of 20-BiZnOS composite catalyst were ascribed to the enhanced photocatalytic activity of the composite catalyst.
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