ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yanping Song,Bin Yao,Yongfeng Li,Zhanhui Ding,Huanhuan Sun,Zhenzhong Zhang,Ligong Zhang,Haifeng Zhao
Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells have been encountering a bottleneck period since the champion power conversion efficiency (PCE) of 12.7% was achieved by Kim et al. in 2014. One of the critical factors that impede its further development is the relatively low open-circuit voltage (VOC) caused by serious interface carrier recombination. In this regard, back surface field (BSF) employment is a feasible strategy to address the VOC issue of CZTSSe solar cells to some extent. Here, we demonstrated a self-organized BSF introduced by prompting interfacial MoSe2 layer transition from inherent n-type to desirable p-type with Nb doping (p-MoSe2:Nb). The BSF application can significantly reduce the carrier recombination at the back electrode interface (BEI) and lower down the back contact barrier height. The PCE of the corresponding cell was improved from 4.72 to 7.15% because of the enhancement of VOC and fill factor, primarily stemming from the doubling aspects of increased shunt resistance (RSh), decreased series resistance (RS), and alleviative recombination velocity of the BEI induced by the BSF. Our results suggest that introducing a BSF fulfilled with p-MoSe2:Nb is a facile and promising route to improve the performance of CZTSSe thin-film solar cells.
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FlatChem
·
2026
·
IF 5.7
Jian Yang,Zhixiang Liu,Xiang Liu
We report a green approach of preparing cationic surfactant with starch. • None of any organic solvent is used during the whole procedure. • The cationic surfactant differs entirely with conventional one in structure. Renewable carbohydrates provided abundant resources for the preparation of carbon dots (CDs), which could serve as a starting material for synthesis of fine chemicals. In this work, soluble starch was first formulated into an aqueous dispersion and then converted into starch-derived CDs (designated as SCDs) via hydrothermal treatment. Subsequently, SCDs were facilely and efficiently modified with n -dodecylamine in an aqueous medium (the modified product was denoted as SCDs-C12). Experimental results demonstrated that a dilute solution of SCDs-C12 reduced the surface tension of water from 72.0 to 31.9 mN·m −1 (25 °C), and its surface activity was comparable to that of some novel gemini surfactants. Additionally, the positively charged SCDs-C12 exhibited excellent performance in inhibiting the growth of E. coli , with a minimum inhibitory concentration of only 0.05 mg·mL −1 , outperforming many previously reported CD-based materials. In summary, this work developed an environmentally friendly and green strategy for the fabrication of multifunctional cationic surfactants. Download: Download high-res image (74KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Siqi Liu,Shanshan Cheng,Zhimeng Liu,Miaomiao Zheng,Hongyuan Wang,Supakorn Boonyuen,Hongyi Gao,Ge Wang
Reactive oxygen species (ROS)-mediated sterilization typically relies on continuous light irradiation or exogenous H 2 O 2 addition, limiting their practical utility under dark or resource-limited conditions. Herein, we rationally design an S-scheme MIL-100(Fe)/Zn 3 In 2 S 6 heterojunction (M 5 Z 1 –1@ZIS2) by in-situ growing Zn-doped MIL-100(Fe) on Zn 3 In 2 S 6 , achieving synergistic light-harvesting and ROS self-supply capabilities. The incorporation of Zn 3 In 2 S 6 enhances electron density around Fe 2+ sites while modulating Fe 3+ states, significantly improving O₂ activation and H 2 O 2 affinity. This unique electronic regulation enables the heterojunction to generate superoxide radical(·O₂ − )-dominated ROS even in the dark. Notably, visible-light pretreatment induces active In sites in Zn 3 In 2 S 6 to produce H 2 O 2 , which accumulates and sustains the FeII/FeIII redox cycle in the absence of light, driving continuous hydroxyl radical(·OH)-dominated ROS generation. Combined characterizations including X-ray photoelectron spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR) confirm H₂O₂-mediated Fe 2+ regeneration and ROS persistence. The M 5 Z 1 –1@ZIS2 heterojunction exhibits exceptional antibacterial performance, achieving ≥99.9% inactivation of Escherichia coli ( E. coli ) within 1.5 h in the dark and 40 min under visible light. This work provides a strategy for designing self-sustaining catalytic systems that leverage light-driven H₂O₂ supply to enable day-night ROS functionality. Furthermore, M 5 Z 1 –1@ZIS2 loaded on polyvinylidene fluoride (PVDF) film can achieve an efficiency of over 99% for particulate matter (PM) pollutants at the wind speeds of 1.5 m/s and 0.5 m/s and reach a maximum adsorption efficiency of 99.5% for formaldehyde within 19 min, highlighting its potential for all-weather air purification via ROS-mediated environmental remediation.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Chunhong He,Hai Luo,Lu He,Xiang Li,Zongde Wang,Shangxing Chen,Yangping Wen,Peng Wang
In this study, we synthesized Fe, N, S co-doped hierarchically porous carbon (Fe-CSK-PCP) with a high specific surface area of 1826.34 m 2 /g and a pore volume of 1.14 cm 3 /g. This material was prepared using discarded lotus seedpods as a carbon source, potassium hydroxide (KOH) as an activator, potassium ferricyanide as both an activator and graphitization promoter, thiourea as a source of N and S dopants, and cetyltrimethylammonium bromide (CTAB) as a pore-enlarging agent. Platinum nanoparticles (PtNPs) were subsequently loaded onto the Fe-CSK-PCP surface via wet impregnation. The enhanced porosity, increased pore size, and heteroatom doping of the Fe-CSK-PCP support have significantly promoted the loading content and dispersion of PtNPs, consequently creating an abundance of active sites. Meanwhile, the hierarchical pore structure has improved the diffusion of analyte and the desorption of oxidation product. Therefore, the fabricated PtNPs/Fe-CSK-PCP sensor exhibited exceptional fouling resistance and electrocatalytic performance in indole-3-acetic acid (IAA) detection, demonstrating a high sensitivity (2.32 μA/μM) and a low detection limit (21.67 nM, S/N = 3) over a wide linear range (0.3–20 μM). This sensor was successfully applied to determine IAA in apple juice samples with satisfactory recoveries.
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MOLECULES
·
2023
·Vol. 28
·期 15
·5885
·
IF 4.6
Haiyan Zhao,Li Chen,Nan Ni,Yang Lv,Hezhen Wang,Jia Zhang,Zhiwen Li,Yu Liu,Yubo Geng,Yan Xie,Li Wang
There is an urgent need to design and synthesize non-noble metal electrocatalysts (NNMEs) for the replacement of platinum-based electrocatalysts to enhance the sluggish oxygen reduction reaction (ORR) for Zn–air batteries and fuel cells. Herein, Fe-N,S-C materials were fabricated through two steps: first, reprecipitating hemin by adjusting the pH and, then, decorating it with melamine and cysteine in the presence of Zn2+. The resulting Fe-N,S-C-950 (Zn) was prepared after pyrolysis at 950 °C. Using this method, abundant iron-based active species with good dispersion were obtained. The fabrication of more micropores in Fe-N,S-C-950 (Zn) plays a positive role in the improvement of ORR activity. On comparison, Fe-N,S-C-950 (Zn) outperforms Fe-N,S-C-950 and Fe-N-C-950 (Zn) with respect to the ORR due to its larger specific surface area, porous structure, multiple iron-based active sites and N- and S-doped C. Fe-N,S-C-950 (Zn) achieves outstanding ORR performances, including a half-wave potential (E1/2) of 0.844 V and 0.715 V versus a reversible hydrogen electrode (RHE) in 0.1 M KOH and 0.1 M HClO4solution, respectively. In addition, Fe-N,S-C-950 (Zn) shows an outstanding Zn–air battery performance with an open-circuit voltage (OCV) of 1.450 V and a peak power density of 121.9 mW cm−2, which is higher than that of 20 wt% Pt/C. As a result, the as-prepared electrocatalyst in this work shows the development of the Zn-assisted strategy combined with the assembly of porphyrins as NNMEs for the enhancement of the ORR in both alkaline and acidic solutions.Keywords:FeNSC;hemin;oxygen reduction reaction;Zn–air battery
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高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Wei Jia,Xin Wang,Lin Shi
Endogenous benzoic acid causes adverse effects on individual health, but the potential mechanisms often remain elusive. The positive rate of benzoic acid in seventy-two goat milk samples in triplicate was 93.6 %, verifying the presence of endogenous benzoic acid. In this study, we investigated the differences in protein expression and metabolites among goat milk with different final concentrations of benzoic acid via combined proteomics and metabolomics (LOQ 3.25 to 56.63 μg L -1 ) analysis based on UHPLC-Q-Orbitrap HRMS. Integrated analysis showed that benzoic acid reduced the content of l -histidine (from 1.27 to 0.49 mg/L) and 1-methylhistidine (from 1.40 to 0.68 mg/L), due to the increase of benzoic acid (0–30 mg/L) concentration significantly reduced the level and activity of N-methyltransferase . Protein-metabolite interactions suggested that benzoic acid enhanced glutamate-cysteine ligase and glutathione S-transferase expression and affected l -glutamate (from 1.22 to 0.49 mg/L) and glutathione contents, eventually leading to the formation of off-flavors and oxidation of goat milk. Meanwhile, the level of l -phenylalanine (from 4.17 to 1.94 mg/L) and l -tyrosine (from 1.05 to 0.26 mg/L) progressively decreased with the increase of benzoic acid concentration, which had a deleterious effect on the nutritional value and flavor formation of goat milk. These findings clarified the mechanism by which low-dose benzoic acid negatively affects the nutritional quality and flavor formation of goat milk.
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高影响因子
JOURNAL OF AOAC INTERNATIONAL
·
2022
·Vol. 105
·期 6
·1596-1604
·
IF 2.028
Long Fei,Zhu Qi,Li Yingping
BackgroundThe ratio fluorescent probe (RF-probe) has the characteristics of self-calibration and eliminating the influence of experimental factors (such as probe concentration, excitation intensity stability, and solution environment) in quantitative assays based on the linear relationship between the intensity ratio of two emission peaks and the concentration of analyte, especially in a complex biological matrix.ObjectiveHigh-luminescent Ag nanoclusters (AgNCs) were prepared at room temperature due to aggregation-induced emission (AIE) through the incorporation of trithiocyanuric acid (TA). Subsequently, a new RF-probe based on mixing of AgNCs-TA with nitrogen and sulfur co-doped carbon quantum dots (N, S-CQDs) was prepared for sensitively and selectively assaying sodium 2, 3-dimercaptopropane-1-sulfonate (DMPS).MethodsThe fluorescence of N, S-CQDs was quenched in the presence of the AgNCs-TA mainly deriving from the inner filter effect (IFE), and its fluorescence intensities at 440 and 650 nm could recover and drop upon the addition of DMPS (λex = 370 nm).ResultsThe RF-probe enables DMPS to be detected by fluorometry with a linear response in the 0.67–30.0 μmol/L concentration range and a 54.7 nmol/L detection limit (at 3σ/slope). At the same time, we also used the labeled recovery method to confirm the reliability of the method. The recoveries were 97.93–106.33%, and the corresponding standard deviations (RSD) were less than 1.87%.ConclusionThe N, S-CQDs/AgNCs-TA RF-probe can also semi-quantitatively monitor DMPS by naked eyes.HighlightsThe mechanism of fluorescence enhancement of the AgNCs by TA also were investigated by the N, S-CQDs/AgNCs-TA-DMPS system. What’s more, the RF-probe of N, S-CQDs/AgNCs-TA was successfully utilized to monitor DMPS in real samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shizong Wang,Jianlong Wang
Cobalt sulfides as persulfate activator have received increasing interest in the field of persulfate-based advanced oxidation process. In this study, Co 9 S 8 anchored in N, S, O heteroatoms co-doped carbon (CoSx@N-S-O-C) composite was prepared with different sulfur precursors (sulfur, thiourea, thiophene and benzyl disulfide), and used to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation. The effect of temperature, pH, inorganic ions, humic acids and water components on SMX degradation was investigated. The results showed that sulfur precursor could regulate the catalytic activity of the composite through changing the cobalt speciation and carbon structure. The catalytic activity was highest when the molar ratio of sulfur to cobalt was 5:1 (CoS x @N-S-O-C-5). Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. The intermediate products during SMX degradation were identified, and the possible pathway of SMX degradation was proposed. Pyridinic N, Co-N, cobalt, S 2− , S 2 2− , C-S-C and C-SO x were active sites for PMS activation.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Cai Xiunan,Tian Ling,Chen Meifei,Liu Yijun,Wang Wei,Long Junhao,Zhang Yanjuan,Tao Gan,Hu Huayu,Huang Zuqiang
To effectively treat the hydrophobic organic contaminant and utilize an industrial solid waste manganese residue (MR), a novel starch-derived carbon (SC)-decorated and Cu-doped (Fe,Cu)S/CuFe 2 O 4 solid solution (CFS/CFO@SC) was prepared from MR via mechanical activation treatment of precursor materials followed by one-step pyrolysis and applied as a photo-Fenton catalyst to treat a hydrophobic organic compound, 17α-ethinylestradiol (EE2). Characterization results showed that the CFS/CFO@SC solid solution with unique crystal and electronic structures exhibited high adsorption capacity and catalytic activity , ascribed to that Cu doping and C decorating enhanced its hydrophobicity and BET surface area. The CFS/CFO@SC showed excellent degradation efficiency with nearly 100% of EE2 removal rate in 40 min (degradation rate constant of 0.112 min −1 ), and a high mineralization degree with 95.2% of TOC removal in 180 min. This could be ascribed to that C decorating and the formation of CFS/CFO solid solution promoted the charge transfer in a continuous band, resulting in effective separation of photogenerated holes–electrons (h + –e – ). The strong interaction of Fe–Cu collaborating with the photoelectron could effectively accelerate the recycle of Fe 3+ /Fe 2+ and Cu 2+ /Cu + , thus generating more active radicals. Moreover, CFS/CFO@SC showed promising stability and recyclability with the EE2 removal rates all >95% after five cycles. This work brings a valuable approach for the rational design of high-performance Fe-based photo-Fenton catalysts for environmental remediation and the valorization of MR.
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Catalysis Science & Technology
·
2021
·Vol. 12
·期 1
·181-191
·
IF 6.119
Xin Wang,Guang-Lan Li,Zhong-Fa Lu,Shuo Cao,Ce Hao,Suli Wang,Gongquan Sun
Reversible oxygen catalysts with good catalytic performance and economic efficiency are urgently needed for the rapid development of metal–air batteries and reversible fuel cells. Herein, a metal-free N, S co-doped porous carbon thin film (NSCF) was coated in situ on carboxylic carbon nanotubes (CNT@NSCF) via a simple and scalable low temperature polymerization–high temperature pyrolysis strategy. By analyzing the surface structure of comparable carbon supports including ketjenblack, Vulcan XC-72 carbon, and activated carbon, it is found that the surface oxygen-containing functional groups of the support are the key factor to obtaining a uniform coating of NSCF with the formation of a large amount of efficient N, S active species. As a result, the optimal CNT@NSCF shows an excellent bifunctional oxygen catalytic activity with a narrow potential difference (ΔE = Ej = 10,OER − E1/2,ORR) value of 0.74 V, which is superior to that of Pt/C + RuO2 (0.75 V) and most metal-free carbon-based oxygen catalysts. Notably, the CNT@NSCF-based rechargeable Zn–air battery delivers a remarkable performance with a high open-circuit voltage and outstanding charge–discharge stability after 213 h, which fully demonstrates the promising practical application potential of the CNT@NSCF catalyst.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 6
·1-15
·
IF 20.1
Xiang Lele,Darboe Abdou Karim,Luo Zhihong,Qi Xiaosi,Shao Jiao-jing,Ye Xiao-Juan,Liu Chun-Sheng,Sun Kai,Qu Yunpeng,Xu Jing,Zhong Wei
Interface engineering and/or impedance matching characteristic played a very important role in microwave absorption. To simultaneously make best of these aspects, herein, two-dimensional (2D)/2D reduced graphene oxide (RGO)/MoSe 2 van der Waals heterojunctions (VDWHs) were elaborately designed and successfully produced in large scale and high efficiency through a simple solvothermal method. By increasing the amount of graphene oxide (GO) from 15 to 45 mg, the designed 2D/2D RGO/MoSe 2 VDWHs with enhanced RGO contents and interfaces could be synthesized, which resulted in their progressively boosted comprehensive microwave absorption properties (MAPs). Furthermore, the proposed route could also be expanded to fabricate 2D/2D RGO/MoS 2 VDWHs. The obtained results demonstrated that the enhanced amount of GO effectively improved their impedance matching characteristics, conductivity loss, and polarization loss capabilities of 2D/2D RGO/MoX 2 (X = Se and S) VDWHs, which contributed to their enhanced comprehensive MAPs. In particular, the RGO/MoSe 2 VDWHs displayed a minimum reflection loss of − 65.34 dB at 6.40 GHz and an effective absorption bandwidth of 4.20 GHz. Therefore, the findings not only presented a combined composition modulation and interface engineering strategy to simultaneously take full advantage of impedance matching characteristics and interfaces for improving the comprehensive MAPs but also provided a simple and propagable route to design and synthesize 2D/2D RGO/MoX 2 (X = Se and S) VDWHs, which could be acted as the good candidates for lightweight high-efficiency microwave absorbers.
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Nanoscale
·
2023
·Vol. 15
·期 45
·18395-18406
·
IF 6.7
Kun Wang,Liyuan Wang,Jinrui Huang,Ye Chen,Xupo Liu,Tianfang Yang,Gangya Wei,Shuyan Gao
The introduction of transition bimetallic alloys can effectively improve oxygen reduction reaction (ORR) activity. However, the alloy particles are inclined to dissolve under harsher conditions, resulting in a serious decrease in catalytic activity and stability. Herein, an efficient ORR catalyst, FeCo alloy nanoparticles (NPs) encapsulated in N,S co-doped carbon nanotubes (FeCo10-NSCNTs), was developed through a self-catalyzed growth strategy. Due to the delicate structural design, the N,S co-doped structure can effectively improve the ORR performance by modulating the electronic properties and surface polarity of the carbon substrate, and the randomly connected carbon nanotube structure with large specific surface area can further enhance the adsorption and dissociation of gas molecules, accelerating the kinetics of gas participation in the reaction. Carbon-encapsulated FeCo alloys are beneficial for improving catalytic activity and durability. The FeCo10-NSCNTs displayed excellent ORR activity with a half-wave potential of E1/2 = 0.84 V and robust stability of 13 k cycles. More impressively, the assembled liquid-state Zn–air battery (ZAB) with FeCo10-NSCNTs as the air-electrode delivers an output power density of 146.68 mW cm−2 along with excellent operation durability. The assembled all-solid ZAB has good cyclic stability under 0–180° bending conditions. The synthesized N,S co-doping, carbon nanotubes and FeCo alloys provide important guidance for the construction of cheap non-noble metal–carbon hybrid nanomaterials.
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