SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuan Li,Sisi Pan,Hongyan Li,Ying Zhao,Jie Zhao,Ping Ning,Kai Li
The selective oxidation of H 2 S into elemental sulfur is considered as one promising method for the removal of this undesired gas. Second heterogeneous atom introducing into N doped carbocatalyst skeleton shows their potential on the enhancement of selectivity. We developed a novel N, S co-doped porous carbon with high pyridinic content and mesoporous pore structure for H 2 S selective oxidation. The experimental results showed that the optimized catalyst exhibits excellent durability about 133 h with 100 % conversion and 95 % elemental sulfur selectivity at 180 °C. Kinetic study and density functional theory calculation reveals that sulfur doping could regulate the electronic structure of N atom on the carbocatalyst surface and further weaken the interactions between N active site and H 2 S molecule, then prevent deep oxidation of H 2 S. The work provides a strategy for atomic-level modulation of non-metal doping catalysts, enabling selective oxidation process for efficient and durable desulfurization.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Aiting Xu,Xueliang Lu,Qiao Zhang,Guangxing Yang,Zhiting Liu,Siyuan Yang,Feng Peng
Constructing strongly coupled S-scheme heterojunctions without sacrificing redox capability remains a central challenge in photocatalytic water splitting. Herein, we report the in situ photogeneration of metallic Bi (Bi 0 ) nanobridges from layered Bi 2 O 2 CO 3 (BOC) under UV irradiation, which effectively wire BOC with TiO 2 (P25) to form a ternary BOC-Bi 0 -TiO 2 S-scheme heterojunction. Under ultraviolet-visible light or simulated sunlight, the optimized BOC-0.5P25 catalyst achieves a high H 2 evolution rate of ∼5.8 mmol·g −1 ·h −1 , which further increases by ∼24 % (to ∼7.2 mmol·g −1 ·h −1 ) after light-activated cycling. The apparent quantum efficiency (AQE) reaches 2.45 % at 380 nm. Structural characterizations confirm the light-induced formation of Bi 0 , accompanied by a slight chemical shift in Ti 2 p and Bi 4 f spectra, consistent with interfacial band bending. Band structure and kinetics analyses elucidate an S-scheme charge transfer mechanism where electrons preferentially flow via Bi 0 into TiO 2 while holes stay on Bi 2 O 2 CO 3 , driven by the built-in field. Isotopic labeling experiments via Gas Chromatography-Mass Spectrometry (GC–MS) isotopologues (CH x D 4-x in D 2 O/MeOH) together with online Differential Electrochemical Mass Spectrometry (DEMS) signals confirm that water contributes to both H 2 production and methanol oxidative reforming (partially to CH 4 ). The concept of light-triggered, in-situ mediator activation provides a practical route for photocatalytic water reduction coupled with methanol oxidative reforming under unbiased and noble-metal-free conditions through engineering tightly coupled S-scheme interfaces.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120748
·
IF 7.2
Yingchao Lü,Qing-an Qiao,Ruping Wang,Yuqi Dong,Honglan Cai,Hongwei Gao
With the advancement of economy, the polluted water from industry is increasing day by day, which inevitably causes great harm to the environment. Photocatalytic technology based on solar energy is considered as one of the effective ways to treat organic pollutants in water because of its advantages of green, high efficiency and environment-friendly. A range of Zn 0.6 Cd 0.4 S/Bi 3 O 4 Br composites were synthesized via in-situ growth method. A comprehensive characterization of the morphology, crystal structure and photoelectronic properties was carried out using multiple techniques, including X-ray diffraction (XRD), Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscopy (XPS), photoluminescence (PL), Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS) and Brunauer-Emmett-Teller (BET). The data from photocatalytic experiments showed that the composite had superior performance than the monomers, the degradation efficiency of methylene blue (MB), rhodamine B (RhB) and tetracycline (TC) reached 97.92 % (80 min), 98.55 % (70 min) and 97.61 % (40 min) respectively. Various water sources (pure water, tap water, lake water and seawater) and different pH conditions were taken into account during the experiments. The results showed that Zn 0.6 Cd 0.4 S/Bi 3 O 4 Br-35 % maintained comparable photocatalytic performance for both dyes and antibiotic in all solutions with different resources of water, indicating its remarkable adaptability across diverse water matrices. The most favored pH condition was neutral (pH = 7). It was confirmed by the radical trapping experiment that holes (h + ) and superoxide radicals (•O 2 - ) were vital to the photocatalytic process. The data from density functional theory (DFT) calculation confirmed that the electron transfer followed an S-scheme mechanism. The formation of S-type heterojunction separated the photogenerated electron-hole pairs effectively, and the Zn 0.6 Cd 0.4 S/Bi 3 O 4 Br-35 % exhibited tremendous potential for future implementations in photocatalytic degradation for organic pollutants.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Rui Ding,Wenjuan Zhang,Shiva Pandeya,Xueqing Zhu,Kai Xu,Meixing Gui,Hongbing Wang,Ziliang Li,Qianqian Shang,Mahesh Kumar Joshi
The design of a double Z-type heterojunction represents a promising strategy in photocatalysis to achieve superior charge carrier separation, increased light-harvesting capability, and consequently, a higher photocatalytic reaction rate. Herein, a novel ternary heterojunction with direct dual Z-scheme configuration, g-C3N4/In2S3/In2O3 photocatalyst, was synthesized using a chemical bath and facile calcination process. The XRD, SEM-EDS and XPS results confirmed the successful integration of g-C3N4, In2S3, and In2O3 with preserved crystalline phases. Photocatalytic performances of the ternary composite were evaluated via two effective routes, such as methyl orange (MO) degradation and hydrogen (H2) generation, benchmarked against the pristine g-C3N4 and the g-C3N4/In2S3 and In2S3/In2O3 binary composite, revealing that the in-situ growth of In2O3 onto the g-C3N4/In2S3 composite contributed to the remarkable enhancement of their photocatalytic activity. The photodegradation process follows the pseudo-first order reaction kinetics. The ternary g-C3N4/In2O3/In2S3 heterojunction exhibited 94.8% degradation efficiency of MO with a corresponding rate of 23.4×10-3 min-1, 4.8 times higher than the pristine g-C3N4, and excellent photocatalytic activity in five consecutive cycles. Similarly, the g-C3N4/In2S3/In2O3 heterojunction exhibited a rate constant of ~2.4 mmol h−1 g−1 for H2 generation. This superior enhancement was attributed to the dual Z-scheme charge transfer mechanism. The formation of direct dual Z-scheme heterojunction improved the light harvesting, minimized electron hole recombination, and efficiently facilitated the separation of charge carriers. This work provided a mechanistic insight for engineering multifunctional heterojunction for environmental remediation and pollutant mitigation.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Yunyun Xie,Guanghua Liu,Zongwang Rao,Zhifang Xu,Jun Zhu,Chao Jiang,Yulong Yang,Zhiwen Hu,Qibing Chang
Fabricating an inexpensive and efficient electrocatalyst for the electrocatalytic oxygen evolution reaction (OER) in an alkaline medium is crucial for renewable energy generation. In this work, nickel foam (NF) modified with few-layer or single-layer MXene (S-MXene) was used as a substrate to prepare an independent, self-supporting composite electrode for oxygen evolution reaction (OER) catalysis. CoFe bimetallic MOF nanosheets were grown in situ on composite substrates by electrodeposition. Compared to multilayer MXene, S-MXene has a larger specific surface area and interlayer spacing, making it an ideal material for enhancing the conductivity of the electrode or serving as a supporting matrix. As an intermediate material, S-MXene can not only reduce the charge transfer resistance of the electrode and improve the active sites but also enhance the structural stability of the electrode, significantly improving the catalytic activity and long-term electrolysis stability of the electrode. The improved CoFe NSs@S-MXene/NF composite electrode delivers a current density of 10 mA cm–2 at a low overpotential value of only 191 mV in 1.0 M KOH, along with an ultralow Tafel slope of 31 mV dec–1. Additionally, the composite electrode exhibits outstanding stability for 24 h during OER at various current densities. This work innovatively uses S-MXene as a base material and develops a highly efficient new type of OER electrode. This novel strategy can serve as a reference for the modification of other electrode materials and expand the application of MXene in the field of water splitting.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Mengzhu Li,Yanqing Wang,Zhiping Fang,Dongchen Guo,Min Fan,Hui Dai,Fuling Guo,Wangchao Chen,Chengwu Shi,Peng Cui
Antimony selenosulfide (Sb 2 (S,Se) 3 ) demonstrates strong potential for thin-film solar cells owing to its tunable bandgap, low toxicity, and high stability. However, conventional fabrication methods often yield films with small grain sizes and random orientations, which hinder device performance. Herein, an in situ polymerization-assisted grain growth (iPAGG) strategy was developed, specifically enabling the oriented growth of Sb 2 (S,Se) 3 on Cd-free TiO 2 substrates, by introducing acrylic acid (AA) into the chemical bath deposition process. The carboxylate groups from AA coordinate with Sb 3+ ions, promoting oriented growth of Sb 2 (S,Se) 3 film. This approach yields films with enlarged grains, reduced defect densities, and strengthened [ hk 1] preferred orientation. As a result, Cd-free Sb 2 (S,Se) 3 solar cells employing the optimized AA concentration yielded a champion power conversion efficiency (PCE) of 7.24%, outperforming the control device (6.70%). Further interfacial modification with poly (acrylic acid)-modified SnO 2 boosts the PCE to 7.55%. This work offers an effective way toward the fabrication of high-performance and environmentally friendly Sb 2 (S,Se) 3 photovoltaics.
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高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2024
·
IF 10.5
Tao Bo,Chenfei Wang,Dingjin Yao,Qiuyu Jiang,Yitong Zhao,Feifei Wang,Wei He,Weiyi Xu,Hao Zhou,Ming Li,Si Zhang,Ruyi Xue
Gene delivery to macrophages holds great promise for cancer immunotherapy. However, traditional gene delivery methods exhibit low transfection efficiency in macrophages. The star -shaped topological structure of polymers is known to encapsulate genes inside their cores, thereby facilitating sustained release of the genetic material. Herein, combining the structural advantages of star polymers and the transfection advantages of poly (β-amino ester)s (PAEs), we developed a novel linear oligomer grafting-onto strategy to synthesize a library of multi-terminal star structured PAEs (SPAEs), and evaluated their gene delivery efficiency in various tissue cells. The transfection with human hepatocellular carcinoma cells (HepG2, HCC-LM3 cells and MHCC-97H cells), rat normal liver cells (BRL-3 A cells), human ovarian cancer cells (A2780 cells), African green monkey kidney cells (Vero cells), human cervical cancer cells (HeLa cells), human chondrosarcoma cells (SW1353 cells), and difficult-to-transfect human epidermal keratinocytes (HaCaT cells) and normal human fibroblast cells (NHF cells) showed that SPAEs exhibited superior transfection profile. The GFP transfection efficiency of top-performing SPAEs in HeLa cells (96.1%) was 2.1-fold, and 3.2-fold higher compared to jetPEI and Lipo3000, respectively, indicating that the star-shaped topological structure can significantly enhance the transfection efficiency of PAEs. More importantly, the top-performing SPAEs could efficiently deliver Nod2 DNA to difficult-to-transfect RAW264.7 macrophages, with a high transfection efficiency of 33.9%, which could promote macrophage M1 polarization and enhanced CD8+ T cell response in co-incubation experiments. This work advances gene therapy by targeting difficult-to-transfect macrophages and remodeling the tumor immune microenvironment.
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Heliyon
·
2023
·Vol. 9
·期 7
·e18046
·
IF 4
Weijie Zhang,Lei Shi,Wei Zhou,Xin Liu,Yuan Xi,Xinyin Wang,Ya Li,Xia Xu,Youcai Tang
Breast cancer is one of the most common cancers. Oridonin, a traditional Chinese medicine, is believed to inhibit tumor growth, but its particular effects on breast cancer remain unknown. In this study, we examined oridonin's effects on 4T1, MCF-7, and MDAMB-231 cellular activity using CCK8. Scratch assays were used to detect oridonin's effects on cellular migration. Oridonin's effects on the breast cancer cell cycle were studied using flow cytometry, and expression of cell cycle related proteins p53, CDK2, and p21 was detected using Western blot assays. Metabolomics assays were used to detect changes in small molecule metabolites and metabolic pathways in breast cancer cells after treatment with oridonin. Oridonin's effects on breast cancer growth were also studied using xenograft mice. Metabolomics assays were used to detect changes in metabolites and metabolic pathways in xenograft mouse plasma in a control group, model group, and drug administration group. Experimental results showed that oridonin could significantly inhibit breast cancer growth both in vivo and in vitro. Scratch experiments showed that oridonin could inhibit breast cancer cell migration. Oridonin was also able to arrest cells in S phase by affecting several cell cycle-related proteins, including p53, CDK2, and p21. Metabolomic analysis of 4T1 cells identified a total of 33 differential metabolites, including multiple amino acids (such as l-Glutamic acid, l-Asparagine, l-Histidine, l-Valine, and l-Isoleucine). KEGG pathway enrichment analysis showed significant changes in aminoacyl-tRNA biosynthesis, and in multiple amino acid metabolic pathways. Plasma metabolomic analyses of xenograft mice revealed 28 differentially-expressed metabolites between the different animal model groups, including multiple amino acids. KEGG pathway analysis showed significant alterations in multiple amino acid metabolic pathways in oridonin-treated mice. Additionally, changes in the expression of PI3K, AKT and mTOR proteins, as well as in branched amino acids, suggest that oridonin affects the PI3K/AKT/mTOR signaling pathway by inhibiting the biosynthesis of valine, leucine and isoleucine. Taken together, our results suggest that oridonin has strong anti-tumor activity in vitro and in vivo, and has potential as an adjuvant to breast cancer treatment regimens.
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高影响因子
Catalysis Science & Technology
·
2012
·Vol. 2
·期 11
·2332-2340
·
IF 0
Jiefeng Hu,Yuping Wang,Min Han,Yaoming Zhou,Xiaoqing Jiang,Peipei Sun
Fe3O4 and Pd nanoparticles were assembled on sulfonated graphene (s-G) by an easy chemical approach and characterized by transmission electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy. The resulting material could be dispersed homogeneously in water or water/ethanol and further used as an excellent semi-heterogeneous catalyst for the Suzuki–Miyaura cross-coupling reaction in an environmentally friendly solvent under ligand-free ambient conditions. The high heterogeneous catalytic activity appears to be due to the small size of Pd nanoparticles and homogeneous distribution of the nanoparticles on the Fe3O4/s-G matrix. In addition, the catalytic activity did not deteriorate even after repeated applications, which may be due to the easy and efficient magnetic separation of the catalyst and the high dispersion and stability of the catalyst in an aqueous solution.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 34
·e202200543
·
IF 5.02
Zhuoran Ao,Youlan Zou,Haiyan Zou,Yuxing Huang,Nantao Chen
Graphical PEO-based Double-layer solid electrolyte was fabricated through casting method. PVP distributed into PEO layer contacting with cathode promotes the dissolution of lithium salts and forms lithium bonds with (LiPSs). The double-layer solid electrolytes can ameliorate the shuttle effect of LiPSs better than pure PEO electrolytes. Despite the high specific capacity of Li−S battery, shuttle effect of lithium polysulfides (LiPSs) and safety issue pose a great challenge to realize its commercial application. Replacing liquid electrolyte with poly (ethylene oxide) (PEO) -based solid-state electrolyte is considered as a promising method to boost the safety, but the shuttle effect of LiPSs cannot be completely eliminated. In this work, a new kind of double-layer PEO-based polymer electrolyte is designed to restrict the LiPSs. The layer next to cathode consists of PEO and poly(vinylpyrrolidone) (PVP). The other layer consists of PEO. PVP with abundant of amide groups has been proved to have strong affinity to LiPSs. The strong interaction between LiPSs and carbonyl groups in amide is verified by Attenuated Total Reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy tests. As a result, the assembled Li−S battery exhibits a specific capacity of 1100 mAh g −1 and capacity retention of 347 mAh g −1 after 200 cycles at 60 °C and 0.05 C, while the capacity retention of the battery without PVP-blended PEO electrolyte remains only 27 % at the same conditions.
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Li Gong,Xiaojiang Qiu,Dong Cheng,Yao Hu,Zaizhi Zhang,Qunsen Yuan,Dezhi Yang,Chengshuai Liu,Liyuan Liang,Feng He
Sulfidated zero-valent iron (S-ZVI) enhances the degradation of chlorinated hydrocarbon (CHC) in contaminated groundwater. Despite numerous studies of S-ZVI, a versatile strategy to improve its dechlorination kinetics, electron efficiency (εe), and dechlorination capacity is still needed. Here, we used heteroatom incorporation of N(C) and S by ball-milling of microscale ZVI with melamine and sulfur via nitridation and sulfidation to synthesize S-N(C)-mZVIbm particles that contain reactive Fe-NX(C) and FeS species. Sulfidation and nitridation synergistically increased the trichloroethene (TCE) dechlorination rate, with reaction constants kSA of 2.98 × 10–2 L·h–1·m–2 by S-N(C)-mZVIbm, compared to 1.77 × 10–3 and 8.15 × 10–5 L·h–1·m–2 by S-mZVIbm and N(C)-mZVIbm, respectively. Data show that sulfidation suppressed the reductive dissociation of N(C) from S-N(C)-mZVIbm, which stabilized the reactive Fe-NX(C) and reserved electrons for TCE dechlorination. In addition to lowering H2 production, S-N(C)-mZVIbm dechlorinated TCE to less reduced products (e.g., acetylene), contributing to the material’s higher εe and dechlorination capacity. This synergistic effect on TCE degradation can be extended to other recalcitrant CHCs (e.g., chloroform) in both deionized and groundwater. This multiheteroatom incorporation approach to optimize ZVI for groundwater remediation provides a basis for further advances in reactive material synthesis.
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高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Ailijiang Abudurusuli,Junjie Li,Tinghao Tong,Zhihua Yang,Shilie Pan
The exploration of novel infrared nonlinear optical (IR NLO) materials with large second-harmonic generation (SHG) responses and wide band gaps has become very imperative recently. Herein we reported two noncentrosymmetric compounds, LiBa4Ga5Q12 (Q = S, Se), crystallizing in space group P421c (No. 114), which feature 3D frameworks built by a basic [Ga5Q16]17– windmill cluster and LiQ4 tetrahedra in a cesium chloride topological structure. Both compounds satisfy the desired balance between good SHG responses (∼1.5× that of AgGaS2) and wide band gaps (3.43 and 2.44 eV) with remarkable laser damage thresholds (21× and 6× that of AgGaS2). The theoretical calculations uncover that the [Ga5Q16]17– cluster makes major contributions to the SHG effect in LiBa4Ga5Q12. In addition, the structure–performance relationship among all compounds in the I–II4–III5–VI12 system has been discussed systematically, which indicates that the introduction of the alkali metal lithium in the I site is beneficial for the production of large band gaps. This work will be helpful in exploring novel IR NLO materials with special structures and comprehensive properties in the chalcogenide system.
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高影响因子
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