JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Shuai He,Rongrong Ren,Liwu Qiang,Man Zhao,Qinyun Yan,Wei Wen,Junming Zhang,He Xiao,Jianfeng Jia
The development of efficient, non-precious electrocatalysts for the oxygen evolution reaction (OER) is critical for sustainable energy conversion technologies. Here, a core-shell structured catalyst C@CoFeSi-P, with vertically aligned cobalt iron silicate nanosheets grown in-situ on hollow mesoporous carbon spheres (HMCS), is synthesized via the hard-template-assisted hydrothermal method followed by low-temperature phosphating. To solve the sluggish kinetics of OER, this design integrates hierarchical porosity, conductive carbon matrices, and optimized electronic structures. The characterization results reveal that Fe doping induces lattice expansion in Co 2 SiO 4 , and phosphate modification generates an amorphous surface rich in unsaturated coordination sites, which collectively enhances the adsorption of oxygen intermediates (*OH, *O, and *OOH). The density functional theory (DFT) calculations demonstrate that the synergistic effects of Fe incorporation and PO 4 3- groups lower the energy barrier (ΔG = 0.29 eV) for the potential-determining step (*O → *OOH), accelerating reaction kinetics. This C@CoFeSi-P catalyst reaches superior OER performance, with overpotentials of 277 mV at 10 mA cm −2 and 404 mV at 100 mA cm −2 . Except that, it also exhibits remarkable stability over 40 h, surpassing most reported transition metal silicate-based catalysts. Furthermore, the Pt/C‖C@CoFeSi-P system displays superior overall water-splitting efficiency compared to conventional Pt/C‖RuO 2 , highlighting its practical potential. This work provides a guidance for multi-scale modulation of electrocatalysts through atomic doping and surface engineering, offering a cost-effective alternative to noble-metal-based systems for sustainable energy applications.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Tinglei Wang,Lu Zhang,Laipeng Sun,Jiaqi Zhao,Yuan Wang,Zexing Qu,Yu Wang
The site-specific boron-doped graphitic carbon nitride (B-g-C3N4-20) has been synthesized via precise solid-state synthesis methods. Thermodynamic analysis indicates that its excellent reproducibility stems from similar activation energies of the dehydration and condensation reactions involving phenylboronic acid and melamine, as well as the dehydration polymerization of melamine with cyanuric acid. It allows both reactions to occur concurrently, leading to the orderly arrangement of intercalated molecules within the carbon nitride nanosheets, facilitating targeted boron incorporation. The boron atoms of the intercalated molecules not only form triple bonds with nitrogen atoms, horizontally arranging in an ordered manner, but also vertically interact with tertiary nitrogen atoms of the carbon nitride nanosheets. This dual-directional ordered interaction between boron and nitrogen creates atomic-scale p–n junctions at the microscopic level and exhibits a pronounced p–n junction effect at the macroscopic level. Such structural characteristics significantly improve the transport pathways for photogenerated charge carriers, resulting in a remarkable increase in photocatalytic performance with a hydrogen peroxide production rate 30 times higher than that of pure graphitic carbon nitride under neutral conditions. This work not only offers additional perspectives for advancing solid-state synthesis methods but also serves as an innovative example for the development of other functional materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
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IF 2.8
Feijing Xu,Nian Yin,Shanjun Gao,Chunhui Shen
Ammonium polyphosphate (APP) and intumescent flame-retardant di-(3-amin-opropyltriethoxysilane) spirocyclic pentaerythritol diphosphate (PDAP) were prepared as an intumescent flame retardant with synergistic effect, and polylactic acid (PLA) was modified by melt blending. The flame retardancy of PLA/PDAP/APP was evaluated by limiting oxygen index (LOI), vertical combustion test (UL-94), and cone calorimetry test (CCT), and the thermal stability of PLA/PDAP/APP was studied by thermogravimetric analysis and thermogravimetry-Fourier transform infrared spectroscopy (FTIR). The possible flame-retardant mechanisms of PLA/PDAP/APP were analyzed based on the results of laser Raman spectroscopy and FTIR. When PDAP:APP = 2:1 and the addition amount of PDAP/APP is 20 wt%, the LOI value of PLA/IFR-modified material is as high as 43%, and the UL-94 test reaches V-0 level, and in the CCT, the PHRR and THR of PLA/PDAP/APP (2:1)-modified material are reduced by 80.7% and 76.8%, respectively, compared with pure PLA, and the carbon residue is as high as 62.01%. The results show that the compound APP/PDAP has an excellent flame-retardant effect on PLA, which provides a good research case for PLA flame-retardant-modified plastic materials.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Yuan Zhang,Kangping Cui,Xueyan Liu,Minshu Cui,Xing Chen,Yuchao Tang,Haiyang Li
Metal-based catalyst could be used for efficient peroxymonosulfate (PMS) activation, but inevitably suffered from metal ion leaching. Metal-free graphitic carbon nitride (g-C 3 N 4 ) materials that can activate PMS are more conducive for practical water treatment. In this study, g-C 3 N 4 with both N-defects and P-doping (CN-NP) was synthesized, which mainly produce singlet oxygen ( 1 O 2 ), and 97 % of 4-CP (4-Chlorophenol) was removed by CN-NP/PMS/Vis reaction system within 60 min. The active species was identified by quenching experiments and electron spin resonance (ESR) tests, and the origin of mainly active species was further verified by the concentration change of PMS during the reaction. It was verified by experiments and theoretical calculations that the introduction of N-defects led to the separation of photoinduced electron-hole pairs and improved photocatalytic activity. Notably, density functional theory (DFT) revealed that both N-defects and P-doping are electron-deficient sites, and P-doping acts as the main PMS adsorption site to promote the loss of electrons from PMS to generate 1 O 2 . In addition, the catalysts developed in this research were anticipated to be applied in real wastewater treatment, contributing to further comprehend the mechanisms of element doping and defect modification in g-C 3 N 4 activating PMS, and providing new insights for the design of PMS-activating catalysts.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
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IF 3.5
Wang Liping,Tao Xin,Li Renxing,Jiang Lirong,Chen Lin,Li Bingqian
Hydrogen is recognized as a clean and efficient energy carrier, and photocatalytic hydrogen generation represents a pivotal technology for sustainable energy development. In this work, a highly active noble metal-free ZnCo 2 O 4 /ZnO/C composite has been successfully synthesized via in situ carbonization of a ZnCo-based Prussian blue analogue (PBA), exhibiting remarkable photocatalytic hydrogen generation activity. Under simulated solar irradiation, the optimized composite achieves a high hydrogen generation rate of 2039.3 μmol/(g·h), along with excellent stability. The significantly enhanced photocatalytic activity originates from a unique S-scheme heterojunction charge transfer mechanism and multi-component synergistic effects. Specifically, the intimate interfacial contact among graphitic carbon, ZnCo 2 O 4 , and ZnO facilitates efficient separation and migration of photogenerated electron–hole pairs. The S-scheme mechanism not only preserves photogenerated electrons with strong reduction capability but also enhances charge carrier utilization. Furthermore, the graphitic carbon improves the electrical conductivity and light-harvesting capability. These factors are responsible for the remarkable photocatalytic performance and good stability. This work provides a compelling demonstration of utilizing PBA-derived carbonization as a versatile platform for fabricating efficient, stable, and scalable photocatalysts for practical hydrogen production.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 35
·e52859
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IF 3.057
Lu Han,Lingxiao Li,Rongsheng Gao,Xueyan Liu,Chengyou Kan
The relationships between morphology and properties are important for functional polymer particles. In this work, stable core/shell PMMA/P(MMA- co -PDSECAE) (C/S) latexes with uniform particle size are first prepared through semi-continuous soap-free seeded emulsion polymerization of methyl methacrylate (MMA) and 2-(((2-[pyridin-2-yldisulfanyl]ethoxy)carbonyl)amino) ethyl acrylate (PDSECAE), and thiol-functionalized core/shell PMMA/P(MMA- co -PDSECAE)-SH (C/S-SH) submicron particles (SPs) are then obtained by reduction of disulfide bonds with dithiothreitol (DTT). Adsorption behaviors of heavy metal ions on the SPs are investigated. Results show that, the C/S-SH SPs, with more thiol groups distributed closer to the surface, have nearly twice the Pb 2+ adsorption capacity of the homogeneous SPs prepared via batch emulsion polymerization. The C/S-SH SPs show strong selective adsorption capacities toward Hg 2+ and Pb 2+ , and maximum adsorption capacities reach 0.477 and 0.303 mmol g −1 , respectively. Due to their high selectivity, adsorption capacity, specific surface area and simple preparation process, these core/shell SPs have promising applications in water treatment.
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高影响因子
XENOBIOTICA
·
2016
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IF 1.723
Rui-Ping Ye,Zhen-Dong Chen
1. The expression and function of P-glycoprotein (P-gp) is associated with the phenotype of multidrug resistance (MDR). Saikosaponin A (SSA) is a triterpenoid saponin isolated from Radix Bupleuri. This study was mainly designed to understand effects of SSA on MDR in MCF-7/ADR and HepG2/ADM cells.2. MDR reversal was examined as the alteration of cytotoxic drugs IC50 in resistant cells in the presence of SSA by MTT assay, and was compared with the non-resistant cells. Apoptosis and uptake of P-gp substrates in the tumor cells were detected by flow cytometry. Western blot was performed to assay the expression of P-gp.3. Our results demonstrate SSA could increase the chemosensitivity of P-gp overexpressing HepG2/ADM and MCF-7/ADR cells to doxorubicin (DOX), vincristine (VCR) and paclitaxel. SSA promoted apoptosis of MCF-7/ADR cells in the presence of DOX. Moreover, it could also increase the retention of P-gp substrates DOX and rhodamine 123 in MCF-7/ADR cells, and decrease digoxin efflux ratio in Caco-2 cell monolayer. Finally, a mechanistic study showed that SSA reduced P-gp expression without affecting hydrolytic activity of P-gp.4. In conclusion, our findings suggest that SSA could be further developed for sensitizing resistant cancer cells and used as an adjuvant therapy together with anticancer drugs to improve their therapeutic efficacies.
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DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2022
·
IF 11.889
Meijiao Peng,Jiatian Zhu,Yadan Luo,Tao Li,Xuelian Xia,Chengrong Qin,Chen Liang,Huiyang Bian,Shuangquan Yao
The cellulose-rich residual solids are obtained with p -toluenesulfonic acid ( p -TsOH) treatment. However, better fractionation of hemicellulose and separation is difficult to obtain during treatment. This study aims at investigating the separation selectivity of bamboo hemicellulose using freeze–thaw-assisted p -TsOH (F/ p -TsOH) treatment. The desired separation effect was achieved at freezing temperature −40 °C, freezing time 20 h, p -TsOH concentration 3.0 %, treatment temperature 130 °C and time 80 min. 93.26 % hemicellulose separation was found, which was 32.88 % higher than that of conventional p -TsOH treatment. Furthermore, the separation yield of lignin decreased significantly from 69.29 % to 13.98 %. The distinct lignin characteristic absorption peaks were found, while that of hemicellulose was difficult to observe. The fiber crystallinity index increased from 50.42 to 56.55 %. Furthermore, greater selectivity for hemicellulose separation was achieved. The results provide a new research thinking for efficient fractionation of lignocellulosic biomass by organic acid treatment.
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DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jiamin Zhong,Shihong Zhang,Yi He,Yi Fan,Zhiyuan Li,Liping Yan,Huilian Zhou,Xinyu Cheng,Jinxue Song,Hongjie Li
In this paper, graphene oxide (GO) and furan epoxide graphene (FGO) were synthesized using graphene (G) as raw materials, and added to Ni-W-P coating as nano-reinforced materials, and various composite materials were successfully prepared by electroless plating , and the effects of G, GO and FGO as nano-reinforced materials on the surface morphology , wear resistance, corrosion resistance and microhardness of Ni-W-P coatings were studied and discussed. The experimental results show that the surface morphology of Ni-W-P-FGO coating is the most complete and dense, without obvious surface defects . In the friction test, Ni-W-P-FGO composite coating has the narrowest wear section, the wear amount is 311.617 μm 2 /N (minimum) and the average friction coefficient is the smallest (0.203) and it shows the best corrosion resistance in the corrosion resistance test, with the lowest corrosion current density (i corr = 0.7095 μA/cm 2 ) and the largest corrosion resistance (Rt = 66,554 Ω·cm 2 ).
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Minmin Liu,Baitong Niu,Hongxu Guo,Shaoming Ying,Zhangxu Chen
g-C 3 N 4 @Ni 3 C nano-sheets have been prepared by a simple pyrolysis under different temperature, and the as-prepared samples have been characterized by many means, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), the Brunauer–Emmett–Teller (BET) and pore size distribution. The as-prepared g-C 3 N 4 @Ni 3 C nano-sheet has been proved to be a versatile functional material, that is the application in supercapacitor electrode materials, hydrogen generation via NaBH 4 hydrolysis and reduction of p– nitrophenol. This method offers a new strategy for preparation of environmental energy materials through simple raw materials.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Youwen Zhang,Haoyue Tang,Qi Xiao,Yu Zhang,Xiaolan Zhao,Shitong Yang
Hydroxyapatite (HAP) has been widely used for the preconcentration and stabilization of various heavy metal pollutants in both the water and soil environment. Nonetheless, there still exists a gap between its synthesis conditions, physicochemical properties and removal performances. Under such a research background, three HAP materials were synthesized via a modified co-precipitation approach by varying initial Ca/P molar ratios (i.e., 4/3, 5/3 and 6/3) and used for capturing toxic cadmium (Cd(II)) from an aqueous solution. According to the experimental results, the three synthesized HAP samples were all the Ca-deficient type and the actual Ca/P molar ratio was in the increasing order of HAP4/3 < HAP5/3 < HAP6/3. In particular, the HAP4/3 sample exhibited higher Cd(II) removal performance due to its higher specific surface area (SSA) value and abundant Ca-deficient sites. More than 93% of Cd(II) was removed within an extremely short period of 5 min and a complete removal was achieved at a prolonged contact time of 24 h. The sorption behavior of Cd(II) was independent of ionic strength variation and scarcely influenced by various inorganic electrolyte ions, low molecular weight organic acids (LMWOAs) and competing heavy metal ions . The desorption data of Cd(II)-containing HAP phases, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses pointed to a predominant removal mechanism of lattice incorporation with a minor contribution of inner-sphere surface complexation. The experimental findings demonstrated the significant application potential of Ca-deficient HAP material for the cost-effective treatment of Cd(II)-polluted water systems.
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高影响因子
CARBON
·
2020
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IF 8.821
Haijun Wang,Haocheng Yuan,Wenwei Zhan,Young-Seak Lee,Hee-Jae Shin,Xianbin Wei,Qing Cai,Jin-Le Lan,Yunhua Yu,Xiaoping Yang
Low-cost sodium ion batteries (SIBs) have shown hopeful perspective for large-scale energy storage systems . However, the development of carbon anode materials with high gravimetric and volumetric capacity is still a challenge. Herein, we propose a novel dense and N, P co-doped carbon derived from high density crosslinked bacterial cellulose (BC) with hexachlorocyclotriphosphazene (HCCP), which simultaneously combines high gravimetric and volumetric capacity. The as-prepared electrode demonstrates a high reversible capacity of 223 mAh g −1 at 0.05 A g −1 and superior rate performance (145 mAh g −1 at 10 A g −1 ) based on the overall electrode materials. The full SIBs with this electrode show a high energy density (156.1 Wh kg −1 ) as well as a high Coulombic efficiency in the potential range of 0–4.2 V. Density functional theory (DFT) calculation and kinetic analysis reveals that the synergistic effect of N, P co-doped configurations contributes to the superior sodium storage performance. Moreover, this electrode possesses high pressing density of 1.40 g cm −3 , which increases the volumetric capacity greatly (from 97.2 to 312.2 mAh cm −3 ). This work proposes a new idea towards the development of low-cost bacterial cellulose that can be used in practical applications for high gravimetric and volumetric performance SIBs.
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高影响因子
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