Frontiers in Chemistry
·
2022
·
IF 5.545
Zhao Benhui,Deng Yueqing,Cao Lei,Zhu Jichun,Zhou Zhengji
Kesterite-structured Cu2ZnSn(S,Se)4 (CZTSSe) thin film photovoltaics have attracted considerable attention in recent years because of its low-cost and eco-friendly raw material, as well as high theoretical conversion efficiency. However, its photovoltaic performance is hindered by large open-circuit voltage (VOC) deficiency due to the presence of intrinsic defects and defect clusters in the bulk of CZTSSe absorber films. The doping of extrinsic cation to the CZTSSe matrix was adopted as an effective strategy to ameliorate defect properties of the solar cell absorbers. Herein, a novel Se&Sb2Se3 co-selenization process was employed to introduce Sb into CZTSSe crystal lattice. The results reveal that Sb-doping plays an active role in the crystallization and grain growth of CZTSSe absorber layer. More importantly, one of the most seriously detrimental SnZn deep defect is effectively passivated, resulting in significantly reduced deep-level traps and band-tail states compared to Sb free devices. As a result, the power conversion efficiency of CZTSSe solar cell is increased significantly from 9.17% to 11.75%, with a VOC especially enlarged to 505 mV from 449 mV. This insight provides a deeper understanding for engineering the harmful Sn-related deep defects for future high-efficiency CZTSSe photovoltaic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Yangke Long,Shun Li,Yiping Su,Shuyang Wang,Shiyin Zhao,Shubin Wang,Zhen Zhang,Wei Huang,Yong Liu,Zuotai Zhang
The poor performance and severe metal leaching of iron-based Fenton-like catalysts during reaction are the main bottlenecks that suppress their practical applications. Herein, a well-defined structure was achieved by confining catalytically active but unstable sulfur-containing iron species within S/N co-doped porous carbon (Fe-S@SNC) through a simple pyrolysis route. The hierarchically porous and highly conductive carbon host not only provided abundant exposed active sites and fast mass/electron-transfer, but also prohibited the aggregation of iron composites during catalysis. The synergistic effects of confined iron nano-composites and heteroatoms (S/N) significantly elevated the activation of peroxymonosulfate (PMS). As a result, the Fe-S@SNC/PMS system exhibited excellent catalytic degradation performance for various contaminants including dyes, phenolic compounds, and antibiotics. Importantly, a low iron leaching was detected during usage due to the nano-confinement effect of carbon layers, and therefore solves the long-term issue of secondary pollution caused by metal leaching. Furthermore, the underlying degradation mechanism of Fe-S@SNC/PMS system was systematically investigated by radical quenching tests, EPR analysis, and chronoamperometry experiments. It was found that the superoxide anion radical (O 2 − ) was the predominant free radicals that contributed to the radical oxidation of organic pollutants, while the electron transfer mediation on Fe-S@SNC resulted in the non-radical oxidation. Additionally, the LC-MS results coupled with time-dependent HPLC spectra validated that the degradation efficiency and intermediate products were significantly dependent on solution pH and background species. This work provides new insight into the design and activation mechanism of iron-based PMS activators.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haoran Pan,Chen Zhang,Jiabin Wu,Huaiguang Li,Teng Zhang,Xinning Huang,Wenguang Tu,Jianglong Yu,Jinxiao Dou,Xingxing Chen
This study reports the successful synthesis of a novel electrocatalyst for oxygen reduction reactions (ORR), comprising S,N dual-doped carbon nanofibers with atomically dispersed Co/Ni species (denoted as Co,Ni-SAs/S,N-CNFs), leveraging electrostatic spinning to achieve a unique spatial architecture that maximizes both active site density and mass transport efficiency. Density functional theory (DFT) analysis identified the initial proton-electron transfer to adsorbed O 2 as the rate-limiting step, with CoN 3 S 1 -NiN 3 S 1 emerging as the pivotal active site structure catalyzing this critical reaction. The fabricated Co,Ni-SAs/S,N-CNFs electrocatalyst exhibited remarkable ORR performance, characterized by a high half-wave potential of 0.84 V and a low Tafel slope of 57.9 mV dec -1 . To gain a comprehensive understanding of its catalytic behavior, a tailored temperature-controlled scanning electrochemical microscopy (SECM) was employed, enabling the mapping of reactivity distribution under simulated operating conditions while preserving structural integrity. Liquid zinc-air batteries (ZABs) with this electrocatalyst excelled, reaching 175 mW/cm 2 power density and enduring 1240 cycles. The electrospun membrane catalyst enabled both button and flexible ZABs, adaptable to diverse environments. This study advances non-precious metal electrocatalyst design and offers insights for ZAB applications, fostering green energy prospects.
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JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
·
2018
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IF 0.827
Liwei Cao,Tian Wei,Yihui Shi,Xiaofang Tan,Jianxin Meng
Two rapid and sensitive analytical methods are developed for the determination of D-penicillamine (D-PEN) and tiopronin (TP) through high-performance liquid chromatography with fluorescence detection (HPLC-FLD) and capillary electrophoresis with laser-induced fluorescence detection (CE-LIF). A boron-dipyrrolemethene (BODIPY) fluorescence labeling reagent, 1,3,5,7-tetramethyl-8-bromomethyl-difluoroboradiaza-s-indacene (TMMB-Br) was successfully applied to derivatize these two thiol drugs. Fluorescein was used as the internal standard (IS) for the quantification of D-PEN and TP in CE-LIF. The derivatization and separation conditions were optimized carefully. Under the optimum conditions, the HPLC and CE separation of D-PEN and TP could be achieved within 12 min. The limits of detection were as low as 2.0 nmol/L for HPLC-FLD and 0.47 nmol/L for CE-LIF. The drugs in human urine and serum samples were determined successfully, and the recoveries were 95.0–06.7% and 95.2–104.3%, respectively.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
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IF 14.224
Lijun Chen,Chenguang Wang,Guozhao Liu,Guanwen Su,Kairu Ye,Wanping He,Huiru Li,Hongyuan Wei,Leping Dang
Reasonable regulation of the micro-morphology of material can significantly enhance the related performance. Herein, bismuth tungstate (Bi 2 WO 6 , simplified as BWO) porous hollow spheres with flower-like surface were prepared successfully, and this unique morphology endowed BWO with improved photocatalytic performance by reflecting and absorbing the light multiple times inside the cavity. To inhibit the rapid recombination of photogenerated e - -h + pairs within BWO itself, black phosphorous quantum dots (BPQDs) were anchored onto the nanosheets of BWO sphere closely by a facile self-assembly process, which will not shade the pores of BWO owing to the small size of BPQDs, but the BP nanosheets have the chance to do that. The band gap of BPQDs expanded much after exfoliation due to the quantum confinement effects, which matched the energy band of BWO well to form S-scheme heterojunction , achieving more efficient separation of photogenerated charges. As a result, the BPQDs/BWO exhibited attractive photocatalytic performance in the degradation of amoxicillin (AMX) and other antibiotics. Besides, the operation conditions were optimized, specifically, 94.5 % of AMX (20 mg/L, 200 mL) can be removed in 60 min when 50 mg of 2BPQDs/BWO was used as catalyst with solution pH = 11. Moreover, a possible degradation pathway of AMX was proposed based on the detected intermediates.
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PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 4
·820
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IF 4.6
Huijuan Han,Yalei Zhang,Chunrui Zhou,Haixin Yun,Yiwen Kang,Kexin Du,Jianying Wang,Shujun Chao,Jichao Wang
To achieve the “double carbon” goal, it is urgent to reform the energy system. The oxygen evolution reaction (OER) is a vital semi-reaction for many new energy-storage and conversion devices. Metal nanoparticles embedded in heteroatom-doped carbon materials prepared by the pyrolyzing of metal–organic frameworks (MOFs) have been a key route to obtain high-performance electrochemical catalysts. Herein, a nanocatalyst embedding Ni nanoparticles into S- and N-co-doped carbon nanoplate (Ni NPs@SN-CNP) has been synthesized by pyrolysis of a Ni-MOF precursor. The prepared Ni NPs@SN-CNP exhibits superior oxygen evolution performance with an overpotential of 256 mV to attain 10 mA cm −2 and a low Tafel slope value of 95 mV dec −1 . Moreover, a self-assembled overall-water-splitting cell with Ni NPs@SN-CNP/NF||Pt-C/NF achieves a low potential of 1.56 V at 10 mA cm −2 and a high cycling stability for at least 10 h. The improvement in this performance is benefit from its large surface area, unique morphology, and the nanostructure of the electrocatalyst. This study presents a novel and simple approach to designing high-performance OER catalysts.
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高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Ting Fang,Weihua Zhu,Xiuxia Zhao,Na Gao,Long Huang,Yangyang Liang,Lei Wang,Kai Cui,Wenxuan Lu,Guanjun Hou
The effect of different cooking methods on metal(loid) bioaccessibility in crayfish muscles has not been adequately addressed. In this study, trace metal(loid)s (Cr, Mn, Fe, Co, Cu, Zn, As, Se, Cd, Hg, Pb) in raw and cooked abdominal muscles of red swamp crayfish ( Procambarus clarkii ) were extracted using an in vitro gastrointestinal digestion model. The effect of cooking methods, specifically steaming, boiling, frying and high-pressure steam, on total concentration and bioaccessibility of trace metal(loid)s was investigated. Trace metal(loid)s were 100 % detected in raw and cooked crayfish muscles with levels met national standard limits. Cooking increased total concentrations of certain metal(loid)s (notably Cr, Cd, and Pb), yet generally reduced bioaccessibility. Methods employing higher temperatures combined with pressure exhibited more pronounced decrease in bioaccessibility. Health risk assessment adjusted by bioaccessibility demonstrated low health risk for crayfish consumers. This research provided a more precise estimation of metal(loid) exposure risk associated with crayfish consumption, thereby informing the development of more appropriate public health safety guidelines.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Xiyu Zou,Yuzhe Hua,Xiangyang Du,Yunan Shen,Zilong Chen,Huachong Chen,Hui Sui,Guangmin Ren,Qingjie Guo,Man Wu,Hongjing Tian
Addressing such limitations of traditional photocatalysts as poor visible light absorption, substantial electron-hole recombination, and inefficient reactive oxygen species (ROS) generation is crucial. In this paper, oxygen vacancies (OVs) rich Bi 2 MoO 6 (BMO)/ZnSe S-scheme heterojunction was successfully prepared using a simple and mild solvothermal method. The introduction of OVs effectively shortened the band gap and increased the visible light absorption range. The mechanism of inducing OVs into BMO by adapting the concentration of surfactants was uncovered using both experimental and DFT simulation results. OVs-BMO/ZnSe exhibited an enhanced charge transfer capacity because OVs facilitated the formation of a rapid electron transfer pathway at the heterojunction interface. The synergistic effect of OVs and S-scheme heterojunction could effectively inhibit the recombination of photogenerated carriers. Its degradation efficiency and turnover frequency per wattage of light (TOF/P) reached 92.1% and 854.98 × 10 -10 (mol·g −1 ·J -1 ), respectively, during the low power LED white light-driven photocatalytic degradation of 50mg/L TC. The high value of TOF/P demonstrated its practical application potential in comparison with some other reported photocatalysts. Liquid Chromatography-Mass Spectrometry (LC-MS) characterization and ECOSAR simulation results indicated that OVs promoted the generation of ROS, in which ·O–2, 1 O 2 and h + significantly reduced the toxicity of intermediate products.
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Carbon Energy
·
2022
·Vol. 5
·期 2
·e255
·
IF 21.556
Yunke Wang,Yige Zhao,Kangli Liu,Shaobin Wang,Neng Li,Guosheng Shao,Feng Wang,Peng Zhang
Sophisticated efficient electrocatalysts are essential to rectifying the shuttle effect and realizing the high performance of flexible lithium-sulfur batteries (LSBs). Phase transformation of MoSe 2 from the 2H phase to the 1T phase has been proven to be a significant method to improve the catalytic activity. However, precisely controllable phase engineering of MoSe 2 has rarely been reported. Herein, by in situ Li ions intercalation in MoSe 2 , a precisely controllable phase evolution from 2H-MoSe 2 to 1T-MoSe 2 was realized. More importantly, the definite functional relationship between cut-off voltage and phase structure was first identified for phase engineering through in situ observation and modulation methods. The sulfur host (CNFs/1T-MoSe 2 ) presents high charge density, strong polysulfides adsorption, and catalytic kinetics. Moreover, Li-S cells based on it display capacity retention of 875.3 mAh g −1 after 500 cycles at 1 C and an areal capacity of 8.71 mAh cm −2 even at a high sulfur loading of 8.47 mg cm −2 . Furthermore, the flexible pouch cell exhibiting decent performance will endow a promising potential in the wearable energy storage field. This study proposes an effective strategy to precisely control the phase structure of MoSe 2 , which may provide the reference to fabricate the highly efficient electrocatalysts for LSBs and other energy systems.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chaojie Li,Yan Zhao,Yongguang Zhang,Dan Luo,Jiabing Liu,Tong Wang,Wanjie Gao,Haipeng Li,Xin Wang
Lithium-sulfur (Li-S) batteries have been long deemed as next generation power supply for portable electronic and vehicle application due to their extremely high theoretical energy and power density. However, the shuttle effect of soluble lithium polysulfides (LiPs) and sluggish Li-S chemistry has severely limited their wide implication. Herein, we designed an ultrathin and vacancy-rich ZnCo-layered double hydroxide (ZnCo-LDH) anchored on CNT substrate (noted as CNT-LDH/Ar). Theoretical calculations and analysis at the experimental level are used to comprehensively explain the mechanism by which the oxygen vacancies (Vo) regulate the catalytic activity and adsorption capacity mechanism. The introduction of CNT not only improves a three-dimensional conductive network, but also exposes more active sites for polysulfide adsorption and conversion. More importantly, our design of Vo endows the material with excellent half-metallicity properties, adsorption capacity and low redox barrier. Benefiting from these properties, the S/CNT-LDH/Ar cathode exhibited excellent rate capability with 524.3 mAh g −1 at 5 C, and maintained an excellent cyclability over 500 cycles at 1.0 C with a capacity fading of only 0.042% per cycle. Most importantly, decent cyclability can be acquired with a remarkably raised sulfur loading up to 5.5 mg cm −2 with the lean electrolyte/sulfur (E/S) ratio of 6 mL g −1 .
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Advanced Science
·
2026
·
IF 14.1
Ruilin Du,Yudi Ren,Qiaoqiao Meng,Peng Wei,Ruyu Zhu,Junjie Bao,Ye Yang,Shuo Yan,Chaorong Yue,Xueying Zhu,Shuo Cao,Chunxia Hao,Wei Sun,Yongli Song,Xihe Li,Zhimin Wu,Siqin Bao,Yanglin Chen
Efficient derivation of neural stem cells (NSCs) from human pluripotent stem cells (PSCs) is crucial in regenerative medicine. Here, we report that the combined application of the retinoic acid receptor agonist TTNPB and the GSK3β inhibitor CHIR99021 in a chemically defined medium enabled the induction of a highly advanced NSCs (ANSCs) population from PSCs. ANSCs display robust neuroectodermal gene expression and a heightened capacity for neural lineage commitment. The combination of TTNPB and CHIR99021 markedly enhanced global chromatin accessibility, particularly at neuroectoderm-specific regulatory elements such as PAX6 and SOX1 , in parallel with reduced accessibility at the loci of pluripotency factors. Notably, TTNPB alone also exerts a marked effect in enhancing chromatin accessibility. Untargeted metabolomic analysis identified a distinct neural-ectoderm associated metabolic state in ANSCs, prominently characterized by elevated choline, alongside S-(5′-adenosyl)-L-homocysteine, adenosine 5′-diphosphate, and glutathione. Exogenous addition of these metabolites was sufficient to induce neuroectodermal marker expression, highlighting the instructive role of the metabolic network in neural fate induction. Moreover, functional studies showed that ANSCs enabled engraftment into depressed rat hippocampi and restored depression-like behavioral deficits. Our study presents a novel small-molecule strategy that leverages TTNPB-centered epigenetic remodeling and metabolic reprogramming as dual mechanisms driving neural differentiation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yiyang Zhang,Bo Yu,Wenyuan Guo,Mingzhi Chen,Mingmin Bai,Weixin Li,Jinbo Xue
Tartaric acid creates cooperative S O coordination sites on MoS 2. • Sugarcane bagasse biochar confines and disperses MoS 2 nanosheets. • Spatial confinement accelerates Pb 2+ transport and interfacial enrichment. • DFT confirms strong Pb 2+ binding at S O dual sites with −5.24 eV. Lead (Pb 2+ ) pollution in industrial wastewater poses severe threats to human nervous system and ecological security due to its high toxicity, bioaccumulation and non-biodegradability. Although MoS 2 nanosheets exhibit excellent affinity for Pb 2+ , their adsorption performance is constrained by nanosheet stacking and limited accessible active site separation performance. Herein, tartaric acid (TA)-functionalized MoS 2 nanosheets were confined within a sugarcane bagasse-derived biochar (BC) scaffold to construct TA-MoS 2 /BC. The porous carbon framework suppresses MoS 2 nanosheet restacking and creates accessible mesoporous channels for Pb 2+ transport, while TA introduces oxygen-containing groups that cooperate with sulfur sites for strong Pb 2+ binding. TA-MoS 2 /BC exhibited a high Langmuir adsorption capacity of 1073.27 mg·g −1 , together with a kinetic adsorption capacity of 726.60 mg·g −1 , which was 1.47 and 2.44 times higher than pure TA-MoS 2 and raw biochar, respectively. After five adsorption-desorption cycles, the composite retained 77.8% of its initial adsorption capacity, demonstrating satisfactory reusability. XPS and DFT analyses confirmed that adjacent S/O dual sites dominated Pb 2+ capture, showing a low adsorption energy of −5.24 eV and charge transfer of 1.068 e. Intraparticle diffusion analysis revealed a multi-stage mass-transfer process, and TA-MoS 2 /BC showed the highest initial diffusion rate constant of 48.25 mg·g −1 ·h -1/2 , confirming that the confined porous structure promoted Pb 2+ migration toward internal active sites. This work provides a confinement-coordination dual-regulation strategy for Pb 2+ removal while offering a value-added route for converting sugarcane bagasse waste into a functional carbon scaffold.
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