ACS Nano
·
2024
·
IF 15.8
Xue Tian,Huan Liu,Bin Cao,Peng Zhang,Yanze Li,Yanchao Ou,Haonan Cui,Mengyao Xu,Bin Xu
MXenes are promising cathodes for Li–CO2 batteries owing to their high electrical conductivity and efficient CO2 activation function. However, the effects of adsorption and electronic structures of MXene on the full life cycle of Li–CO2 batteries have been rarely investigated. Here, we employ a coregulation approach to enhance the adsorption–decomposition of lithium carbonate (Li2CO3) by introducing Zn and Cl surface groups onto the Ti3C2 MXene (Zn–Ti3C2Cl2) catalyst. The incorporation of Cl surface groups enhances Li2CO3 adsorption on the MXene catalyst surface, resulting in the formation of small-sized and uniform Li2CO3. Additionally, the introduction of Zn shifts the d-band centers of titanium and promotes CO2 evolution reaction (CO2ER) activity, thereby facilitating the decomposition of discharge products. As a result, the Li–CO2 battery based on the Zn–Ti3C2Cl2 catalyst exhibits an ultralow overpotential (0.72 V) at 200 mA g–1 and stable cycling for up to 1500 h. This work validates the efficacy of promoting reversibility in Li–CO2 batteries by adjusting the adsorption-decomposition process.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2019
·
IF 2.6
Wei Zhao,Kunfeng Li,Peng Lin,Kai Xu,Shengheng Tan
Some particular hazardous and nuclear wastes containing a large amount of chlorine would cause the problematic processing during the waste vitrification, because of the low solubility of Cl in silicate glasses . Although a few works reported the chlorine behavior in aluminosilicate glasses, the results do not always show the consistency and a small variation of glass compositions may cause the significant changes. The present work studied the dissolution of Cl in the range of alkaline earth aluminosilicate glasses with the nominal mole composition of 50SiO 2 -10Al 2 O 3 -40AeO (Ae = Ca, Sr or Ba). The solubility of Cl in the glasses with different alkaline earth species followed the order of Ca (~8.1 wt%) > Sr (~6.0 wt%) > Ba (~3.5 wt%). The glass density and glass transition temperature decreased with the addition of Cl in three types of glasses, and AeCl 2 salts, identified with X-ray diffraction, segregated from the glasses, when Cl addition exceeds its solubility. Raman spectra indicate the dissolution of Cl leads to the increase of bridged oxygen bonds in glasses, supposing that Ca 2+ ions are attracted by Cl − ions, leaving the non-bridging oxygens that initially associated with Ca 2+ ions are bonded to Si 4+ (Al 3+ ) to become bridging oxygens.
研究领域:
材料科学
·
核废料处理
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DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Jiakun An,Gaoyu Chen,Xia Zhu,Xin Lv,Jianchun Bao,Xiangxing Xu
All-inorganic perovskite CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) are emerging as attractive materials for photodetectors due to their prominent positive photoresponse. In this work, ambipolar photodetectors were constructed based on heterojunctions of CsPbX3 QDs and ZnO nanocrystals (NCs). The transition between the positive photoconductivity (PPC) and negative photoconductivity (NPC) was successfully controlled not only by the drain-source voltage (VDS) but also by the excitation wavelength and CsPbX3 crystal size. A high responsivity (R), on–off ratio (η), and detectivity (D*) were achieved for NPC (R = 1046 mA/W, η = 281, and D* = 1.65 × 1011 Jones), with PPC (R = 146 mA/W, η = 64, and D* = 1.54 × 1011 Jones) simultaneously revealed in the same device. A general mechanism combining the type-II heterojunction, the component and size-related band structure, and most critically the in-band trap states of the perovskites was established for understanding the unique ambipolar property. It exhibits application potential in developing functional photodetectors, memristors, and optical logic devices.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yangyang Li,Ji Li,Ting Li,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
Chlorine (Cl 2 ), a toxic and hazardous gas with a pungent odor, has already posed threat to air quality and human health. Therefore, developing chlorine sensors with high response and low power consumption is crucial. In this work, raspberry-like SnO 2 decorated uniformly with SnS nanoparticles was synthesized via a facile solvothermal method followed by an in-situ sulfurization process, which can be used for highly selective and sensitive detection of Cl 2 at 50 °C. The SnS/SnO 2 sensor exhibits ultrahigh response (R g /R a = 1136) toward 10 ppm Cl 2 at optimal working temperature of 50 °C, achieving low detection limit down to 0.05 pp m (S = 1.52), which is 2.5 times higher than that of pure SnO 2 sensor. Its superior sensing performance can be attributed to the formation of the p-n heterostructure, which accelerates electron transfer within the material. More importantly, the as-prepared SnS/SnO 2 sensor still exhibits effective and stable detection performance toward residual chlorine in daily life, significantly extending its practical applicability and providing valuable reference for developing high-performance near room-temperature gas sensors.
研究领域:
材料科学
·
气体传感技术
·
纳米技术
·
环境监测
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiaoyan He,Caiyun Zhang,Meng Wang,Yunlei Zhang,Liqin Liu,Wu Yang
Conductive hydrogels are a class of composite materials that usually comprise hydrated polymers and conductive materials. Practical application requires the conductive hydrogels to have various properties such as high conductivity, toughness, self-healing, facile processing ability, and so on. Although challenging to have all the above-mentioned properties, a composite material composed of polymer hydrogel with embedded Au nanoparticles (i.e., P(NaSS)/P(VBIm-Cl)/PVA@Au) was found to show the comprehensive properties above in this paper. For example, P(NaSS)/P(VBIm-Cl)/PVA@Au exhibits mechanical and electrical self-healing properties at ambient conditions. In addition, P(NaSS)/P(VBIm-Cl)/PVA@Au is tough and thermoplastic, potentially making it useful for a variety of applications.
研究领域:
材料科学
·
纳米技术
·
复合材料
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产品关联
DOI
PubMed
高影响因子
MethodsX
·
2020
·
IF 0
Yuxuan Dai,Na Yue,Wenlong Huang,Hai Qian
A new strategy for solid phase peptide synthesis in the fragment synthesis based on the use of 2-Cl-trityl resin as carrier to obtain protected peptide-resin and Rink Amide Resin, HOBT/HBTU or PyBOP/DIPEA or HATU/DIPEA as the coupling method is described. The highlights of this method are: • Simple. • Low cost. • Solid phase based.
研究领域:
生物化学
·
药物化学
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产品关联
DOI
PubMed
ACS Nano
·
2022
·
IF 18.027
Quan Chen,Yuyang Yao,Junbin Liao,Junhua Li,Jingwen Xu,Tongtong Wang,Yuanyuan Tang,Yanqing Xu,Huimin Ruan,Jiangnan Shen
Ion-conductive polymers having a well-defined phase-separated structure show the potential application of separating mono- and bivalent ion separation. In this work, three side-chain-type poly(arylene ether sulfone)-based anion exchange membranes (AEMs) have been fabricated to investigate the effect of the stiffness of the polymer backbone within AEMs on the Cl–/NO3– and Cl–/SO42– separation performance. Our investigations via small-angle X-ray scattering (SAXS), positron annihilation, and differential scanning calorimetry (DSC) demonstrate that the as-prepared AEM with a rigid benzimidazole structure in the backbone bears subnanometer ion channels resulting from the arrangement of the rigid polymer backbone. In particular, SAXS results demonstrate that the rigid benzimidazole-containing AEM in the wet state has an ion cluster size of 0.548 nm, which is smaller than that of an AEM with alkyl segments in the backbone (0.760 nm). Thus, in the electrodialysis (ED) process, the former exhibits a superior capacity of separating Cl–/SO42– ions relative to latter. Nevertheless, the benzimidazole-containing AEM shows an inability to separate the Cl–/NO3– ions, which is possibly due to the similar ion size of the two. The higher rotational energy barrier (4.3 × 10–3 Hartree) of benzimidazole units and the smaller polymer matrix free-volume (0.636%) in the AEM significantly contribute to the construction of smaller ion channels. As a result, it is believed that the rigid benzimidazole structure of this kind is a benefit to the construction of stable subnanometer ion channels in the AEM that can selectively separate ions with different sizes.
研究领域:
材料科学
·
离子分离技术
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Mingming Wang,Yurui Fan,Qinyuan Hong,Wenjun Huang,Xing Han,Zan Qu,Naiqiang Yan,Haomiao Xu
Mercury emissions from acetylene hydrochlorination processes in polyvinyl chloride (PVC) production pose severe environmental risks yet remain poorly quantified due to methodological limitations in high-reactivity C2H2/HCl atmospheres. We reported an advanced operando mercury speciation platform named PVC-OHM, engineered through systematic optimization of the Ontario Hydro method (OHM), achieving simultaneous real-time detection of elemental mercury (Hg0) and divalent mercury (Hg2+) with unprecedented sensitivity (0.12 μg/m3) under industrially relevant conditions. Our mechanistic investigation reveals three dominant mercury escape pathways: (1) thermal desorption, wherein localized hotspots accelerate HgCl2 decomposition and elevate the saturated vapor pressure at carbon-mercury interface (from 0.9 to 20.3 atm), contributed to 80% of total Hg loss; (2) C2H2 driven reductive decomposition of HgCl2 catalyst at carbon–mercury interfaces, responsible for 65–78% of Hg0 emissions and (3) excess chlorine adsorption-induced desorption ([HgCl2/AC] Cl5, Eads > 0) accounting for >10% of Hg2+ emissions. Quantitative tracking demonstrates alarming mercury loss of per gram catalyst (5 wt % Hg) reached as 3.08 mg Hg0 and 9.01 mg Hg2+, directly linked to localized thermal gradients (ΔT = 250–300 °C) at reaction hotspots. This work establishes the first experimentally validated framework for mercury fate prediction in carbide-based PVC synthesis, providing actionable strategies for emission control through hotspot mitigation and coordination environment optimization.
研究领域:
环境化学
·
化学工程
·
催化科学
·
污染控制
·
工业排放
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 20
·14046-14054
·
IF 4.449
Qingxin Zeng,Tingting Yan,Kai Wang,Yinyan Gong,Yong Zhou,Yongli Huang,Chang Q. Sun,Bo Zou
In situ Raman spectroscopy revealed that transiting H2O/NaX (∼64) solutions into an ice VI phase and then into an ice VII phase at a temperature of 298 K requires excessive pressures with respect to pure water. The increase of the critical pressures varies with the solute type in the Hofmeister series order: X = I > Br > Cl > F ∼ 0. The results suggest that the solute hydration creates electric fields that lengthen and soften the O:H nonbond and meanwhile shorten and stiffen the H–O bond through O–O Coulomb repulsion. Compression, however, does the opposite to solute electrification upon the O:H–O bond relaxation. Therefore, compression of the aqueous solutions recovers the electrification-deformed O:H–O bond first and then proceeds to the phase transitions, which requires excessive energy for the same sequence of phase transitions. Ice exclusion of solute disperses the frequencies of characteristic phonons and the critical pressures with unlikely new bond formation.
研究领域:
物理化学
·
高压科学
·
材料科学
·
光谱学
·
水溶液物理
✓ 已验证
DOI
高影响因子
Processes
·
2021
·Vol. 9
·期 4
·652
·
IF 2.847
Huanong Cheng,Na Li,Rui Zhang,Ning Wang,Yuanyuan Yang,Yun Teng,Wenting Jia,Shiqing Zheng
The solubility of hydrogen sulfide in different mole ratios of ferric chloride and 1-butyl-3-methylimidazolium chloride ionic liquid (rFeCl3/[bmim]Cl,r= 0.6, 0.8, 1.0, 1.2, 1.4) at temperatures of 303.15 to 348.15 K and pressures of 100 to 1000 kPa was determined. The total solubility increased with the increase of pressure and the decrease of temperature. The solubility data were fitted using the reaction equilibrium thermodynamic model (RETM). The mean relative error between the predicted value and the measured value was less than 4%. Henry’s coefficient and the equilibrium constant of chemical reaction at each temperature were calculated. Henry’s coefficient first decreased and then increased with the increase of mole ratio, and increased with the increase of temperature. The equilibrium constant of the chemical reaction followed the same law as Henry’s coefficient. The chemical solubility was related to both Henry’s coefficient and the chemical equilibrium constant. H2S had the highest chemical solubility in FeCl3/[bmim]Cl at a mole ratio of 0.6 and a temperature of 333.15 K. The chemical solubility increased with the increase of pressure.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2026
·
IF 4.1
Yu Wang,Qiushuo Cheng,Ting Zhang,Lei Lü,Haixia Ma
The pyrolysis of energetic materials (EMs) directly determines their combustion performance and energy release efficiency. This study designed a potassium-doped maghemite (KF) catalyst with sea urchin-like structure. Traditional lead-based catalyst could cause serious environmental pollution, whereas KF may offer dual advantages of flame suppression and high catalytic activity. Electron paramagnetic resonance (EPR) spectroscopy demonstrate the increased defect concentration compared with commercial γ-Fe 2 O 3 and α-Fe 2 O 3 . The as-prepared KF catalyst provides more surface active sites, significantly enhancing its catalytic performance for the thermal decomposition of hexanitrohexaazaisowurtzitane (CL-20). Graphene oxide (GO) always acts as a stabilizer for EMs due to the excellent mechanical properties. Hence, K-γ-Fe 2 O 3 /reduced graphene oxide (KFG) was prepared via the one-step solvothermal method. Experimental results show that the ternary KFG composite can lower both the initial decomposition temperature and the apparent activation energy of CL-20. KFG accelerates the decomposition process of CL-20 and narrows the distribution of gaseous products. This study reveals the synergistic mechanism among potassium, γ-Fe 2 O 3 , and graphene, providing new design strategy and theoretical foundation for highly efficient combustion catalysts applied in solid propellants.
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产品关联
DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 8
·1641
·
IF 3.7
Lele Chen,Ruqing Chen,Yule Huang,Meiqing Liang,Yang Zhou,Danning Ma,Kai Guo
Bi2O2Se is an emerging oxyselenide semiconductor, noted for its promising thermoelectric properties and excellent chemical stability, and it is often regarded as an n-type counterpart to p-type BiCuSeO. However, its intrinsic thermoelectric figure of merit (zT) is severely limited by low electron concentration and high thermal conductivity. In this work, we employed Cl element as donator dopant to substantially enhance the carrier concentration. The room-temperature carrier concentration of Bi2O2Se0.98Cl0.02thereby reached 2.70 × 1020cm−3, representing an improvement of two orders of magnitude compared to that of pristine Bi2O2Se. Subsequently, multiple hot-pressing cycles were applied to the optimized composition Bi2O2Se0.98Cl0.02. The process induced significant grain refinement, and the resulting high density of grain boundaries effectively suppressed the lattice thermal conductivity, reducing it to 0.95 W·m−1·K−1at 823 K. Eventually, a maximumzTof 0.24 was achieved at 823 K for the three-time hot-pressed Bi2O2Se0.98Cl0.02sample, representing a 71% improvement compared with the pristine Bi2O2Se sample prepared by single hot-pressing (zT= 0.14 at 823 K). This work provides a new strategy for enhancing the thermoelectric performance of oxyselenide through the synergistic regulation of doping and microstructure.
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DOI
PubMed
高影响因子
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