Catalysts
·
2022
·Vol. 12
·期 10
·1100
·
IF 4.501
Jingxin Tan,Guoqiang Wei,Zhen Wang,Hui Su,Lingtao Liu,Chunhu Li,Junjie Bian
Zn1−xCdxS catalysts with Zeolitic Imidazolate Framework-8 (ZIF-8) as the precursor were successfully prepared by ion exchange method, and the ability and electrochemical properties of a series of ZIF-8, ZnS and Zn1−xCdxS catalysts in photocatalytic degradation of 2-CP and TC were investigated. Doping of Cd ions was able to modulate the ZnS band gap width and improve the utilization of visible light by the photocatalyst. The nanocage catalysts with hollow structure of Zn1−xCdxS have better photocatalytic response. The removal of photocatalytic pollutants was up to 90% under optimal conditions. Using a Peroxymonosulfate (PMS)-assisted system to improve the degradation efficiency of 2-chlorophenol and tetracycline hydrochloride under visible light, we present a possible mechanism of Zn1−xCdxS as a photocatalyst for degradation in persistent pollutants and in PMS-assisted photocatalysis. Four active species, O2−, h+, -OH, and SO4•−, can be generated to degrade 2-chlorophenol and tetracycline hydrochloride under PMS-assisted activation. Zn1−xCdxS nanocage with high activity and stability provides a feasible approach to catalytically remove persistent pollutants from aqueous solutions under visible light conditions.Keywords:nanocage photocatalyst;Zn1−xCdxS;2-CP;TC;PMS;degradation
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Qian Liu,Panpan Xu,Qianqian Zhang,Guangming Han,Ling Li,Limin Zhou
A series of novel MIL-53(Fe)/CoWO 4 composites were synthesized by combining MIL-53(Fe) and CoWO 4 nanoparticles via solvothermal method. The structural characterizations showed that CoWO 4 nanoparticles were uniformly distributed on the surface of hexagonal bipyramid MIL-53(Fe). Combining XPS and Mott-Schottky plots, a Z-scheme heterojunction was formed between MIL-53(Fe) and CoWO 4 , resulting in a significant improvement in the electron-hole pair separation efficiency. UV–vis diffused reflectance spectra indicated that the optical arrange of MIL-53(Fe)/CoWO 4 composites were expanded to visible light. The photocatalytic degradation experiments under visible light irradiation showed that MIL/CWO-60 synergistically with PMS degraded 90.5 % of TC-HCl within 50 min. The XRD spectra of used and unused composites were identical, indicating good stability in four consecutive cycles. Electron paramagnetic resonance (EPR) and free radicals trapping experiment revealed that active species included O 2− , SO 4 − , h + , OH and 1 O 2 , and mechanism of the synergistic degradation of TC-HCl by MIL-53(Fe)/CoWO 4 composites and PMS was proposed.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DRUG DELIVERY
·
2020
·
IF 4.902
Pengcheng Zhang,He Tao,Liyang Yu,Lixiao Zhou,Chenggang Zhu
Injectable implants with the ability to form in situ are one of the most promising carriers for the delivery of chemotherapeutic drugs to tumor sites. We have reported a novel injectable in situ-forming implant system composed of n-butyl-2-cyanoacrylate (NBCA), ethyl oleate, along with the sol-gel phase transition. The chemotherapeutic drug-loaded injectable NBCA ethyl oleate implant (INEI) exhibited excellent therapeutic efficacy for local chemotherapy. Herein, we utilize this INEI to carry N, N′-(Sulfonyldi-4,1-phenylene)bis(2-chloroacetamide) (TE-C-5003), which is a selective protein arginine methyltransferase 1 (PRMT1) inhibitor, to treat the lung cancer mice model. The in vitro experiment shows that TE-C-5003 has a good anti-tumor effect on lung cancer (IC50 = 0.7022 µM for A549; IC50 = 0.6844 µM for NCL-H1299) and breast cancer (IC50 = 0.4128 µM for MCF-7; IC50 = 0.5965 µM for MDA-MB-231). Anti-tumor experiments in animal models showed that the average growth inhibition rate of xenografted human lung cancer cells by the TE-C-5003-loaded INEI (40% NBCA) was 68.23%, which is far more than TC-E-5003 alone (31.76%). Our study further confirms that INEI is an effective technique to improve the anti-tumor effect. The druggability of small molecule compounds can be improved with the help of the mentioned technology. Also, TC-E-5003 may be developed as a broad spectrum anti-tumor drug.
研究领域:
肿瘤学
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药学
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药物递送系统
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hao-Ran Chen,Min Wan,Zi-Mu Li,Wen-He Zhong,Si-Yu Ye,Qiang-Qiang Jia,Jun-Yi Li,Li-Zhuang Chen
Molecular ferroelectric materials are widely applied in piezoelectric converters, non-volatile memorizers, and photovoltaic devices due to their advantages of adjustable structure, lightweight, easy processing, and environmental friendliness. However, designing multifunctional molecular ferroelectrics with excellent properties has always been a great challenge. Herein, a multiaxial molecular ferroelectric is successfully designed by modifying the quasi-spherical cation dabco with CuBr2 to obtain halogenated [Bretdabco]CuBr4 (Bretdabco = N-bromoethyl-N′-diazabicyclo [2.2.2]octane), which crystallizes in polar point groups (C6). Typical ferroelectric behaviors featured by the P–E hysteresis loop and switched ferroelectric domain are exhibited. Notably, the molecular ferroelectric shows a high TC of 460 K, which is rare in the field and could greatly expand the application range of this material. In addition, the band gap is adjustable through the regulation of halogen. Both the UV absorption spectra and theoretical calculations indicate that the molecular ferroelectrics belong to a direct band gap (2.14 eV) semiconductor. This tunable and narrow band gap semiconductor molecular ferroelectric material with high TC can be utilized more effectively in the study of optoelectronics and sensors, including piezoelectric energy harvesters. This research may provide a promising approach for the development of multiaxial molecular ferroelectrics with a tiny band gap and high TC.
研究领域:
材料科学
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电陶瓷
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铁电材料
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光电
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半导体物理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Yi Wang,Xinyan Xiao,Jiayi Chen,Xingye Zeng
A novel AgBr and GO co-decorated g-C 3 N 4 /Ag 2 WO 4 (g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO) composite was successfully fabricated by hexadecyl trimethyl ammonium bromide (CTAB)-assisted co-deposition of AgBr and GO onto g-C 3 N 4 /Ag 2 WO 4 composite. The as-prepared composites were characterized by XRD, SEM, TEM, FT-IR, BET, XPS, UV–vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), and electrochemistry impedance spectroscopy (EIS). The photocatalytic efficiency for tetracycline (TC) degradation over the as-prepared g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO composite is 91.64% within 100 min simulated sunlight irradiation, which is nearly 2.59 and 5.25-folds greater than those of the g-C 3 N 4 /Ag 2 WO 4 and g-C 3 N 4 samples. The enhancement of photocatalytic performance is mainly ascribed to the introduction of AgBr and GO, which serve as photosensitizer and electron acceptor, respectively, confirmed by the results of DRS, PL, and EIS. The active species trapping experiments confirmed that O 2 − and h + are the dominant reactive species responsible for TC degradation. Furthermore, a reasonable n-n heterojunction-based photocatalytic mechanism for the g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO composite was proposed.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
PROTEIN EXPRESSION AND PURIFICATION
·
2025
·
IF 1.2
Hao Wang,Xiaohui Zhang,Cunlong Yin,Lu Liu,Liang Chen,Hengfang Tang,Bo Wu,Junfeng Wang
Tumor necrosis factor receptor superfamily member 4 (OX40) is essential for the activation and maintenance of T cell immune function because of its recognition and regulation in signal transduction, therefore understanding the structure and dynamics of the membrane protein OX40 in a near-native membrane environment is critical for elucidating its functions. However, efforts to prepare OX40 in a stable, functional form and reconstitute it into a membrane-mimicking lipid system face persistent challenges, limiting progress in its structural and functional characterization. Here, we developed an efficient method for the expression in E. coli and purification of the N-terminal truncated transmembrane and cytoplasmic domains of OX40 (OX40-TC) using a TrpLE fusion system. High-purity OX40-TC was achieved and successfully reconstituted into membrane scaffold protein (MSP)-nanodiscs for the first time. Characterization through size-exclusion chromatography, dynamic light scattering, and transmission electron microscopy confirmed their stability and homogeneity. This study provides a reliable platform for investigating the structure and function of OX40-TC, advancing our understanding of OX40-mediated signaling and its therapeutic potential.
研究领域:
免疫学
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结构生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
·
IF 5.4
Guangyu Xu,Han Chen,Jingjing Cai,Baowei Hu,Linfa Bao
The contamination of heavy metals and antibiotics represents one of the most serious environmental issues. In this study, the synergistic removal of chromium (Cr(VI)) and tetracycline (TC) by nZVI/MoS 2 composites was investigated to evaluate the removal performance of nZVI-based composites. The characterizations showed that the addition of MoS 2 increased the dispersion of nZVI, provided multiple electron-rich active sites and facilitated the electron transfer of photocatalysis. The addition of TC significantly enhanced the Cr(VI) removal rate, increasing it from 60 % to 80 % within 10 min. The catalytic reaction rate of nZVI/MoS 2 increased from 0.0046 to 0.0163 min −1 . Furthermore, the presence of Cr(VI) also improved the photodegradation efficiency of TC. Based on XPS and EPR analyses, the synergistic removal of Cr(VI) and TC was mainly attributed to enhanced electron transfer promoted by the presence of TC, which accelerated the photocatalytic reduction of Cr(VI) to Cr(III). Surface complexation modeling further confirmed that Cr(VI) removal by nZVI/MoS 2 involved both adsorption and reduction processes. These results are anticipated to inform the design of more efficient nZVI-based composites for practical applications in environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Q. Wang,L. Bian,K. Li,Y.C. Liu,Y.L. Yang,B. Yang,W.W. Cao
<001> textured Pb(Ni 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PNN-PZT) ceramics were prepared by templated grain growth (TGG) technique using 0.36PNN- x PZ-(0.64- x )PT ( x = 0.23, 0.25 and 0.27) powder matrix. Optimum template content was derived to achieve the best electromechanical properties of textured ceramics. The piezoelectric coefficient d 33 = 1165 pC/N, Curie temperature T C = 197 °C, longitudinal mode electromechanical coupling factor k 33 = 0.86 and a very large effective piezoelectric strain coefficient d 33 * = 2041 pm/V were simultaneously achieved at the morphotropic phase boundary (MPB) composition ( x = 0.25) with 3 vol.% BaTiO 3 (BT) templates. Domain structures of textured ceramics were analyzed in detail to reveal the origin of these high piezoelectric and electromechanical properties.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Dan Lin,Han-Shu Xu,Jingjing Luo,Haoliang Huang,Yalin Lu,Kaibin Tang
A new iron-base superconductor SmFFeAs is synthesized via solid-state metathesis reaction by using SmFCl and LiFeAs as precursors. The compound crystallized in the tetragonal ZrCuSiAs-type structure with the space group P4/nmm and lattice parameters of a = 3.9399(0) Å and c = 8.5034(1) Å. The superconducting diamagnetic transition occurs at 56 K for the parent compound, which confirmed by the resistivity and magnetic susceptibility. The appearance of superconductivity without extrinsic doping could be ascribed to the self-doping owing to the mixed valence of Sm ions. The as-synthesized SmFFeAs serves as a new self-doped parent compound for oxygen-free high-critical-temperature (high-Tc) superconductors.
研究领域:
超导物理
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材料科学
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凝聚态物理
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Meiling Wu,Yang Tao,Yuwei Liu,Sanying Hou,Tiyang Xiao,Qing Fu,Guowen Peng,Lang Shi
In this study, Fe/N co-doped graphene-like honeycomb porous carbon (Fe-NC)was produced and used for the activating PMS to degrade TC. The Fe-NC catalyst has shown high activity in the TC degradation by activated PMS, with an efficiency of up to 94 % in 30 min. while the blank catalyst without N and Fe doping exhibited the lowest performance with 47.3 % TC degradation. Moreover, other operational factors of Fe-NC catalysts were also investigated to evaluate its catalytic activity. The burst experiments and electron paramagnetic resonance (EPR) experiments demonstrated that free radical paths (O 2 ·- ) and non-free radical paths ( 1 O 2 ) coexist inside the Fe-NC/PMS system. The experiment results and degradation mechanism analysis revealed that N species(Pyridine N, Graphite N,Fe-N x ) and iron species (Fe0) were possible to be the active species of catalysts. Furthermore, Fe-NC/PMS system was investigated for possible pathway of TC degradation by liquid mass spectrometry (LC-MS), and the presence of intermediates was analyzed for toxicity magnitude by ECOSAR software.
研究领域:
环境科学
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催化材料
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Mingxin Ren,Jizhou Yang,Zhiyuan Chen,Zhi Wan,Peilin Zuo,Zhenghang Tian,Zhigang Liu,Feng Teng,Peng Hu,Haibo Fan
Tetracycline antibiotic contaminants have attracted more and more attention due to their high toxicity and the difficulty of their natural decomposition. Here, we have successfully regulated the morphologies of Ga2O3 photocatalysts (Ga2O3 QDs, Ga2O3 hollow spheres, and Ga2O3 micrometer rods) through a simple solvothermal and hydrothermal method and investigated their photocatalytic degradation of tetracycline hydrochloride (TC-HCl). It was found that Ga2O3 QDs showed the best photocatalytic performance due to their large specific surface area (61.1838 m2 g–1), wide bandgap (4.62 eV), etc. After the preparation conditions had been optimized, the Ga2O3 QDs synthesized at 240 °C and 10 h exhibited the best performance in degrading TC-HCl; after 500 W xenon lamp irradiation for 20 min, the degradation efficiency can reach 99% and the degradation rate reached 0.2988 min–1. By trapping experiments, the main active substances in the degradation of TC-HCl by Ga2O3 were identified as a superoxide radical (•O2) and a hole (h+). This study provides a new idea of catalyst morphology regulation and a new method for efficient photocatalytic degradation of TC-HCl.
研究领域:
环境化学
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材料科学
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光催化
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纳米技术
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污染物降解
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 14
·2213964
·
IF 19
Qin Chen,Haidong Jiang,Yipeng Fan,Zhou Li,Huang Ye,Yunpeng Yao,Shuang Chen,Chengmin Ji,Shuhua Zhang,Junhua Luo
Hybrid organic–inorganic perovskite (HOIP) ferroelectrics with high Curie temperature ( T c ), typified by the lead halide hybrid perovskite ferroelectrics, are developing rapidly owing to their maneuverable ferroelectricity at high temperatures. However, acquiring high- T c lead-free HOIP ferroelectrics via rational strategy still needs development. In this study, a brand-new program by modulating the steric confinement in a cuplike cavity to design high- T c bismuth-halide ferroelectrics [H 2 mdap]BiX 5 (H 2 mdap = N -Methyl-1,3-Propanediamine, X = Cl ( 1 ), Br ( 2 ), I( 3 )) is proposed. Emphatically, the T c enhanced dramatically from 264 K of 3 to 318 K of 2 and 377 K of 1 , induced by the substitution of Br and Cl to I, accompanied with an interesting transition from second-order phase transition (for 3 ) to the first-order one (for 1 and 2 ). The extent of T c increase is up to 113 K, which far outweighs that of reported Pb-halide hybrid ferroelectrics. Structural and computational analyses elucidate that this unprecedented improvement of T c is due to the higher phase transition energy barriers induced by modulating the steric confinement of cuplike cavity via halogen substitution. These results will provide new inspiration for designing high- T c lead-free HOIP ferroelectrics.
研究领域:
材料科学
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物理化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）