CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Jie Xue,Ziyu Wang,Andrew Comstock,Zhiyu Wang,Herman H. Y. Sung,Ian D. Williams,Dali Sun,Junwei Liu,Haipeng Lu
Recent discoveries of novel physics in two-dimensional (2D) magnetic materials have sparked the search of new layered magnetic semiconductors. Compared to the traditional inorganic 2D van der Waals crystals, hybrid organic–inorganic metal–halide frameworks offer significantly enhanced chemical and structural versatility, where their optical, electronic, and magnetic properties can be readily modulated with both organic and inorganic components. Here, we reported a series of new Fe–Cl-based layered double perovskites LnMIMIIICl8, [n = 4, L = phenylethylammonium or chiral R-(+)-β-methylphenethylammonium and n = 2, L = 1,4-butanediammonium; MI = Ag/Na; MIII = Fe/In]. UV–vis measurements show that their optical band gaps are highly tunable by varying the organic cations, MI ion, and MIII ion. Magnetic susceptibility measurements suggest an antiferromagnetic coupling between the nearest FeIII–FeIII, where the Curie–Weiss temperature, Néel temperature, and frustration factors can be easily modulated with their compositions and dimensionality. Our study demonstrates the rich and interesting magnetic properties in these layered transition-metal–halide double perovskites and paves the way for design of multifunctional magnetic materials.
研究领域:
材料科学
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凝聚态物理
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Zhengquan Yan,Lin Xing,Lin Zhao,Xinyi Zhang,Yingfan Zhang,Yulian Tang,Xuemei Zhou,Lei Hu,Nianlei Zhu
In this work, to efficiently eliminate the threat of toxic Cl − and Hg 2+ , a kind of AgRu bimetal mesoporous nanozyme co-stabilized by β-cyclodextrin and graphene oxide (AgRu@β-CD-co-GO) was first developed by a homogeneous redox and assembly method. The mesoporous microstructure and a large number of hydroxyl groups and GO aryl rings endowed AgRu@ β-CD-co-GO with superior peroxidase-mimic performance and enough active spots to adsorb more toxic Cl − and Hg 2+ . Under optimal conditions (pH 4.0, 350 μL 1.5 mM TMB and 200 μL 1.0 M H 2 O 2 and incubated for 30 min at 25 °C), AgRu@ β-CD-co-GO could accelerate the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxTMB in the presence of H 2 O 2 . Toxic Cl − or Hg 2+ would exclusively alter its peroxidase-like activity, accompanied with the characteristic UV–vis absorption intensity at 653 nm ( A 653 ) decreased and color changed from blue to colorless. AgRu@ β-CD-co-GO was successfully applied for visual detection of Cl − and Hg 2+ and enriched removal of them after their detection. The detection limits were low to be 3.2 × 10 −10 mol∙L −1 for Hg 2+ and 6.4 × 10 −8 mol/L for Cl − . After detection, more than 94.9% Hg 2+ and 93.8% Cl − could be removed by only a simple filtration. The mechanisms for peroxidase-mimic activity of AgRu@ β-CD-co-GO and its exclusive recognition of Hg 2+ and Cl − were proposed.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenqing Li,Shimin Zhang,Songchao Shi,Xiaoying Cheng,Chongwei An,Jingyu Wang,Baoyun Ye
Realizing the balance between high energy density and multifunctionality of energetic materials is a hot spot in current research, and its study is of great significance for the application of energetic materials. Regulating microstructure is widely recognized as an effective strategy for solving such problems. In this paper, four different microstructures of Hexanitrohexaazaisowurtzitane(CL-20)/1,1-diamino-2,2-dinitroethylene(FOX-7) composite microspheres, namely, hollow, porous irregular microspheres, porous microspheres, and layered porous microspheres, were prepared by microchannel recrystallization technology. The effects of crystal precipitation rate, binder mechanical properties, and purity of water phase on the microstructure of composite microspheres were systematically investigated. The four prepared samples were spherical particles with regular morphology and uniform particle size. The angle of repose and mechanical sensitivity tests showed that the CL-20/FOX-7 composite microspheres had good dispersibility and mechanical sensitivity. Ignition experiments show that hollow microspheres have the best energy release efficiency, while porous microspheres have higher energy density and more stable energy release efficiency. The results show that the combustion performance and safety of the composite microspheres can be effectively enhanced by adjusting the microstructure. Microchannel recrystallization technology can realize the controllable preparation of the microstructure of composite microspheres, which provides a reference for the design and preparation of other composite microspheres.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2015
·Vol. 145
·期 10
·1913-1921
·
IF 2.307
Wu Jing,Zhi Yunfei,Shan Shaoyun,Su Hongying,Wu Shuisheng,Jia Qingming
Abstract Polypyrrole(PPy) supported Cr(III)(salen)Cl catalyst was prepared for alternating copolymerization of cyclohexene oxide and carbon dioxide. The supported catalyst and the copolymerization products were characterized by FTIR, XRD, XPS, ICP-MS, SEM, TEM, NMR, gel permeation chromatography, thermogravimetric analysis and differential scanning calorimetry. After the study, we concluded that the homogeneous Cr(III)(salen)Cl is successfully supported on the PPy, and its catalytic performance is much better than the homogeneous one. Moreover, the copolymerization product catalyzed by PPy-Cr(III)(salen)Cl exhibits higher molecular weight, narrower molecular weight distribution, superior thermal stability and selectivity. Graphical Abstract
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jianmin Wang,Shanshan Zheng,Haijin Li,Ruoyu Huang,Yuan Zhu,Hao Zhang,Jinyang Qian,Yongtao Li,Xiaofang Liu,Xiaolong Deng
The oxygen evolution reaction (OER) is a vital half-reaction involved in water splitting applications. However, the slow kinetics of its four-electron transfer process have become a bottleneck for performance improvement. Surface engineering has emerged as a pivotal strategy to surmount the inherent kinetic limitations of OER. Herein, this work proposed a simple Cl − -promoted electrochemical surface reconstruction strategy. The as-obtained Ni 3 S 2 -PBA-NaCl-5000s exhibited excellent OER performance, with a low overpotential of 260 mV at 10 mA cm −2 and a small Tafel slope of 38.2 mV dec −1 in alkaline media. The addition of Cl − in the electrolyte not only accelerated the surface activation process but also modulated the structure of the in-situ generated NiFe oxide hydroxides/hydroxyls (NiFeOOH). Compared to the pure KOH condition, the obtained NiFeOOH exhibited a larger surface area, yielded a higher concentration of OH − environment on the surface, which facilitated the OER kinetics rate. Moreover, lattice oxygen is triggered, thus enabling the reaction via a faster lattice oxygen-mediated mechanism (LOM) pathway, which presents lower thermodynamic barriers. This work may offer a fresh perspective on clarifying the OER activity enhancement mechanism by the influence of Cl − in the electrolyte on the electrochemical surface reconstruction process.
研究领域:
电化学
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材料科学
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催化
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能量转换
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Xiandong Wang,Yu Liu,Xinghui Zhang,Wenqing Tu,Qiyu Wang,Shuai Liu,Miao Zhang,Yongming Wu,Bixian Mai
As emerging alternatives to perfluorooctane sulfonate (PFOS), 6:2 chlorinated polyfluoroalkyl ether sulfonic acid (6:2 Cl-PFESA) and sodium p -perfluorous nonenox-benzenesulfonate (OBS) were frequently detected in the four freshwater fish species collected from Poyang Lake. Median concentrations of 6:2 Cl-PFESA and OBS in fish tissues were 0.046–6.0 and 0.46–5.1 ng/g wet weight, respectively. The highest concentrations of 6:2 Cl-PFESA was found in fish livers, whereas OBS was found in the pancreas, brain, gonads, and skin. The tissue distribution pattern of 6:2 Cl-PFESA is similar to that of PFOS. The tissue/liver ratios of OBS were higher than those of PFOS, suggesting that OBS has a greater tendency to transfer from the liver to other tissues. The logarithmic bioaccumulation factors (log BAFs) of 6:2 Cl-PFESA in three carnivorous fish species were greater than 3.7, whereas those of OBS were less than 3.7, indicating that 6:2 Cl-PFESA had a strong bioaccumulation potential. Notably, sex- and tissue-specific bioaccumulation of OBS has also been observed in catfish. Most tissues (except the gonads) exhibited higher OBS concentrations in males than in females. However, no differences were found for 6:2 Cl-PFESA and PFOS. Maternal transfer efficiency of OBS was higher than that of 6:2 Cl-PFESA and PFOS in catfish ( p < 0.05), indicating that OBS presents a higher risk of exposure to males and offspring through maternal offloading.
研究领域:
环境科学
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生态毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Wei Shen,Zhihua Chen,Junmin Xia,Jiayu Jiang,Yanfeng Chen,Yanxing He,Hao Cui,Wei Zhao,Suyun Liu,Shufen Chen
The soft ionic nature, tunable lattice structure, variable component, and solution processability make metal halide perovskite (MHP) materials good candidates as high-entropy materials. Although composition regulation of the X site can be easily achieved by mixing two types of halogens, it remains challenging to prepare high-entropy MHP (HEMHP) with three types of halogens due to the large octahedral factor (μ) difference of [PbX6]4–. Fundamental research is explored to synthesize HEMHP incorporating Cl–, Br–, and I– via μ regulation engineering, which breaks the limitation of a 6% Cl/I ratio in perovskite to achieve 116%. Doping AlCl3 in CsPbBrI2 could successfully reduce the μ differences for [Pb1–aAlaX6](4–a)–, shorten the Pb–X bond length, and enhance the Pb–X bond energy via the Al–X covalent bond. Therefore, the crystal distortion and halogen ion migration could be inhibited to form a homogeneous HEMHP, such as Cs1.18Pb0.92Al0.08(Cl0.13Br0.51I0.36)2.45L–0.81, Cs1.12Pb0.88Al0.12(Cl0.25Br0.49I0.26)2.53L–0.71, and Cs1.06Pb0.85Al0.15(Cl0.29Br0.46I0.25)2.43L–0.78. Such μ regulation engineering method is feasible and universal to use other metal ions (Zn2+, Mn2+, and In3+) to synthesize single-phase HEMHP. Furthermore, the optical band gap and emission peak wavelength for HEMHP and MHP are linearly dependent on their lattice distances, which is the intrinsic characteristic for composition-depended perovskite.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Rui Liu,Peng Zhang,Huijie Li,Chunsun Zhang
Flow chemiluminescence (CL) is widely applied for detection of heavy metal ions in environment, but it is seldom used in economical, practical, or affordable settings because non- and minimally instrumented flow driving is difficult to achieve. Here, we first report a gravity and capillary force-driven flow CL (GCF-CL) lab-on-cloth device, toward development of low-cost, easy-to-use, portable, minimally-instrumented platform for determination of trivalent chromium [Cr(III)] in water, where a difference in height between two zones on cloth creates a fast flow of CL trigger solution. Wax screen-printing was used to fabricate ultra-low-cost cloth-based devices, and the light emitted from the Cr(III)-catalysed oxidation of luminol by H 2 O 2 was imaged using an inexpensive portable CCD camera. Under optical conditions, Cr(III) could be determined over the range of 0.01–100 mg/L, with a detection limit of 6.2 μg/L, an analysis time of less than 30 s per sample, and RSDs of 6.2%, 3.1% and 1.7% for 0.05, 0.5 and 5 mg/L Cr(III) (n = 5). The proposed GCF-CL lab-on-cloth was successfully applied for measuring Cr(III) in water samples, with recoveries of 100.67-111.70% and RSDs of 4.73–6.88%. Thus, the presented method should have the potential for portable field applications in environmental and public health fields.
研究领域:
环境科学
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分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Ma SongYuChen,Li YinHui,Di Yang,Liu Tao,Wang DeQi,Shi WenJing,Ling ZhiGang,Li FengSheng,Liu Jie
To enhance the safety performance and thermal stability of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexazepane (CL-20), a core–shell composite was synthesized via in situ polymerization of aniline on polyethyleneimine (PEI)-modified CL-20. PEI modification introduced –NH 2 groups onto CL-20 surface, providing active sites for aniline polymerization and inhibiting its self-polymerization, thus forming dense polyaniline (PANI) shells with uniform thickness (about 2.8 mass%) while maintaining the high-energy crystal structure of CL-20. Compared to pure CL-20, CL-20-P@PANI showed a 15.8 °C increase in phase transition temperature (185.5 °C) and a 4 °C rise in thermal decomposition temperature (247.21 °C), attributed to the thermal barrier effect of PANI shells. The results of the mechanical sensitivity test indicate that the dense polyaniline shell layer effectively dissipates external forces, leading to a 51.43% reduction in impact sensitivity and a 20% decrease in friction sensitivity. This study provides a novel modification approach for high-energy materials by combining PEI-mediated interface engineering with in situ polymerization, ensuring both safety and energy characteristics. Graphic abstract
研究领域:
含能材料
·
材料科学
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高分子化学
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热工学
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安全工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1968-1977
·
IF 6.177
Yiwen Yang,Haifeng Qi,Zhanwei Xu,Z. Conrad Zhang
In this work, we identified the prevailing catalytically active species evolved from paired PdCl2–CuCl2 in 1-butyl-3-methylimidazolium chloride ([BMim]Cl) that displayed dramatic synergy between the two metal chlorides in catalyzing the hydrolysis of β-1,4-glycosidic bonds in cellulose. Ultraviolet-visible (UV-vis), far infrared (FIR), and electron paramagnetic resonance (EPR) spectroscopy provide clear evidence for the prominent evolutionary pathways to form the catalytically active species. It is observed that the strong synergy between [PdIICl4]2− and [CuIICl4]2− is initiated by the presence of a saccharide. In the absence of a saccharide, the spectroscopic features of [PdIICl4]2− and [CuIICl4]2− in their paired solution show little change with respect to those of individual metal chloride solutions. The evolution of a highly active heterometallic PdII–Cl–CuI complex from paired PdCl2–CuCl2 in the presence of saccharides is revealed by the transition of the FIR absorption peak of PdII–Cl. Glycolaldehyde as the simplest model compound, which is the same as the reducing end group of saccharides, is applied to determine the possible catalytic species. X-ray absorption spectroscopy (XAS) verifies that [CuIICl4]2− is reduced to [CuICl3]2− by glycolaldehyde. The HCl generated from reduced [CuIICl4]2− is also found to contribute to the hydrolysis of cellobiose, serving as another catalytically active species in paired PdCl2–CuCl2/[BMim]Cl. Paired PdCl2–CuCl2 pretreated with glycolaldehyde exhibits dramatically higher activity than direct use of paired PdCl2–CuCl2 in cellobiose conversion. Strikingly, the PdII–Cl–CuI complex is found to be substantially more active than HCl in the hydrolysis of β-1,4-glycosidic bonds as evidenced by the sustained high cellobiose conversion after neutralization of HCl with NaOH.
研究领域:
催化
·
化学工程
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 39
·16877-16890
·
IF 3.288
Xiangbo Song,Chenguang Wang,Lungang Chen,Qiying Liu,Jianguo Liu,Yuting Zhu,Jun Yue,Longlong Ma
Ionic liquids (ILs) as additives were used in the selective conversion of bio-based carbohydrates to 5-hydroxymethylfurfural (HMF) in this work. The effect of adding various imidazole-based ionic liquids with different anion structures on the production of HMF from fructose was firstly investigated in aqueous media. The presence of 15 wt% 1-butyl-3-methylimidazole chloride ([Bmim]Cl) ionic liquids in water with Fe2(SO4)3 as the homogeneous catalyst provided a more effective HMF synthesis compared to that without [Bmim]Cl addition. The enhanced HMF yield was mainly attributed to the fact that [Bmim]Cl might play a vital role in stabilizing the HMF molecule, which could thereby suppress side reactions involving HMF (e.g., its rehydration to levulinic acid or/and polymerization to humins). NMR and FTIR analyses suggested that such a stabilization effect stemmed from the interaction of [Bmim]Cl with the hydroxyl and aldehyde groups of HMF through hydrogen bonding. By performing the operation in a biphasic system (i.e., with the biomass-derived THF solvent as the organic phase and the addition of NaCl salt into water for improving HMF partition), the HMF yield over the Fe2(SO4)3 catalyst in the presence of the [Bmim]Cl additive could be further improved. The catalyst and ionic liquids were quite stable, and could be reused for more than five cycles with a consistent activity. A similar enhancement effect of [Bmim]Cl was also demonstrated in HMF synthesis with better yields from other biomass feedstocks or derivatives (including glucose, sucrose, cellobiose, inulin and starch) in aqueous media.
研究领域:
化学工程
·
催化
·
绿色化学
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生物化工
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 13
·6182-6191
·
IF 6.97
Jinjin Ma,Qianting Yao,John A. McLeod,Lo-Yueh Chang,Chih-Wen Pao,Jiatang Chen,Tsun-Kong Sham,Lijia Liu
Inorganic lead halide perovskite CsPbX3 (X = Cl, Br, or I) nanocrystals are promising candidate materials for light-emitting devices and optoelectronics. Mn-Doped CsPbX3 is of particular interest, as the Mn-doping introduces an additional emission band, making this material a promising white-light emitter. In this study, Mn-doped CsPb(Br/Cl)3 nanocrystals are prepared at room-temperature and ambient pressure. The chemical environment of Mn, and the luminescence of these nanocrystals are analyzed in detail using X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), X-ray absorption near-edge structure (XANES) and X-ray excited optical luminescence (XEOL). Although the introduction of Mn does not alter the long-range order of the CsPbX3 crystal, it leads to a local lattice contraction with the bond length of Mn–X much shorter than Pb–X. We also find excitation energy-dependence in both the intensity and wavelength of the perovskite excitonic emission band, while only in intensity of the Mn emission band. Detailed fitting of the XEOL reveals that the perovskite emission band is dual-channel, and it is the excitation energy-dependent intensity variation of these two channels that drives the observed red-shift of the combined emission band. Our findings also confirm that the Mn emission band is driven by exciton-Mn energy transfer and clarify the Mn chemical environment and the luminescence mechanism in Mn-doped CsPb(Br/Cl)3 nanocrystals.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
固体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）