JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 60
·期 20
·2855-2865
·
IF 3.046
Muchen Lu,Yihu Song,Qiang Zheng,Wanjie Wang
Copper chloride (CuCl 2 ) is used in sulfur-cured natural rubber (NR) to regulate disulfide exchange reaction in self-healing process while factors influencing the healing capability remain unclear. Herein CuCl 2 and other additives including zinc oxide and sulfur are used to mediate self-healing efficiency of NR vulcanizates. For revealing the role of proteins and phospholipids in NR, the mediated self-healing capability is compared with sulfur-cured isoprene rubber (IR) vulcanizates. The results reveal that CuCl 2 interferes rheological responses and vulcanization dynamics in both rubbers, and it causes intermolecular disassociation in NR gums. As self-healing capability is closely related to crosslinking density, formulation is adjusted to balance healing efficiency and tensile strength. Healing efficiency of around 70% and the highest tensile strength of about 6 MPa are achieved at crosslinking density about 70 mol/m 3 when vulcanizates are healed at 140°C for 30 min. Graphical
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhaoyu Mao,Xiang Gao,Juan Qiu,Chunchao Chen,Kangwei Gongsun,Changming Bu,Qing Zang,Min Yu,Houyi Ma
A simple two-electrode system was utilized to fabricate a layer of CuCl on the surface of bronze for simulating the "bronze disease". The addition of L-arginine (Arg) reduced the conversion time of the CuCl patina in water from 6 h to 3 h and enhanced the protection efficiency of the transformed patina from 27.9 % to 81.8 %. The alkalinity of Arg and its coordination capacity with Cu 2 + facilitate the transformation of CuCl, modify the transformation mechanism, and alter the morphology and structure of the patina. The immersion experiment further substantiates the stability and self-reinforcing properties of the Arg-transformed patina.
研究领域:
材料科学
·
文物保护
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shuohan Yang,Yonghou Xiao,Wuyue Zhang,Yu Qiao,Qidong Zhao,Ning Zhang,Gaohong He
Cuprous ion-based zeolites have been proven as promising carbon monoxide (CO) adsorbents by virtue of their excellent adsorption and regeneration properties due to π complexation. However, existing preparation methods still suffer from the problems of a cumbersome process and low loading amounts of cuprous ions. Herein, we proposed a one-step synthesis strategy of using ethanol as a solvent to provide a reducing protective environment, which enabled the facile and controllable preparation of highly dispersed CuCl over 5A zeolites. Using CuCl as a copper source, to ensure the integrity of the 5A zeolite structure, CuCl species were directly loaded onto the 5A support in one step. Ethanol solution could effectively protect Cu(I) from being oxidized by oxygen in air and improve the stability of cuprous ions in Cu(I)/5A adsorbents. The results demonstrated that the Cu(I)/5A prepared by this method exhibited a superior CO adsorption performance to the pristine 5A zeolite. The adsorption capacity of CO over Cu(I)/5A attained 3.44 mmol·g–1 at 298 K and atmospheric pressure, which was evidently superior to those of CuY (2.7 mmol·g–1) and CuSAPO34 (1.84 mmol·g–1) reported in the literature, while the adsorption capacity of H2 was only 0.069 mmol·g–1 under the same condition. According to the ideal solution adsorption theoretical model, CO was preferentially adsorbed and the IAST selectivity of CO in the CO/H2 binary mixture over Cu(I)/5A was about 273.4. This study provides a novel and effective way to synthesize high-efficiency CO adsorbents.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 3
·587-592
·
IF 3.382
Chunli Jiang,Qianqian Luo,Hanmei Fu,Hechun Lin,Chunhua Luo,Jianlu Wang,Xiangjian Meng,Hui Peng,Chun-Gang Duan,Junhao Chu
Great attention has been paid to organic–inorganic hybrids in searching for single-phase multiferroics because of their flexible structure design. Here, a new [CuCl4]2− based organic–inorganic hybrid, (bix)CuCl4·H2O (bix = 1,4-bis(imidazol-1-ylmethyl)benzene), is synthesized via a simple solution method. Different from most [CuCl4]2− based organic–inorganic hybrids, tetrahedral [CuCl4]2− units in (bix)CuCl4·H2O are connected to each other through water molecules and form one dimensional chains. The coexistence of ferroelectric and antiferromagnetic ordering in (bix)CuCl4·H2O is demonstrated. Its spontaneous polarization and coercive field at room temperature are 2.03 μC cm−2 and 0.32 kV cm−1, respectively. Furthermore, (bix)CuCl4·H2O films with high quality can be easily prepared, which makes them suitable for application in device fabrication.
研究领域:
材料科学
·
凝聚态物理
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yang Hao,Hao Wang,Rui Han,Caixia Liu,Qingling Liu
Treating wastewater with elevated ammonia nitrogen levels in garbage treatment plants is a global concern, with blow-off recognized as an efficient process for nitrogen removal. However, this method generates low-concentration ammonia, presenting a challenge for adequate recovery. This study addresses this issue by impregnating metal halides onto K 2 CO 3 -activated biogas residue to create composite materials tailored for adsorbing low-concentration ammonia. We systematically investigated the impact of activation parameters, metal halide type, loading capacity, and environmental conditions on the adsorption properties of the materials. Notably, at an activation temperature of 700 °C, utilizing copper chloride with a loading capacity of 30 %, the material exhibited a saturation adsorption capacity of 29.32 mg/g for 200 ppm NH 3 , with a breakthrough time of 45.6 min, significantly surpassing the untreated sample and demonstrated excellent regeneration performance. SEM, BET, and FTIR analyses revealed that the material provided dispersion sites for metal halides, promoted the complexation of metal halides and ammonia and retained pores for ammonia diffusion, thereby enhancing adsorption efficiency. This innovative approach contributes to waste utilization and ensures efficient ammonia recovery through metal halide-ammonia complexation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 18
·2100819
·
IF 6.147
Weiguang Lin,Wangkang Qiu,Yisimayili Tuersun,Xu Huang,Sheng Chu
The low melting gallium-based liquid metal (LM) is showing tremendous potential in many technologies due to its unique properties. However, the high surface tensions as well as oxidations result in poor wetting capability on most solid surfaces, which limits its practical application. In this work, a simple chemical method is utilized to enable spontaneous wetting of LM on various metal surfaces, such as copper, nickel, and iron. It is found that LM can spread rapidly on the metal substrates treated with CuCl 2 solution through reactive-wetting and metallic bond-enabled wetting mechanism. The redox reaction between Ga and copper compound and the formation of intermetallic compound via LM phagocytosis help drive LM to wet metal substrates spontaneously. Many factors affecting the wetting behaviors of LM, including surface roughness, crystal size, and ambient environment, are systematically studied. This finding provides a novel strategy to solve the wetting problem of LM and will enable wider applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wenwu Zou,Zhenze Xie,Chang Du
Basic copper chloride (Cu 2 (OH) 3 Cl) microspheres with different surface nanostructure were synthesized via the dissolution regulation of calcite in CuCl 2 solution. We studied the influence of CuCl 2 concentration, reaction time and reaction temperature on the formation of Cu 2 (OH) 3 Cl, and the products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy , field emission scanning electron microscopy and transmission electron microscopy . The concentration of CuCl 2 has a great influence on the dissolution rate of calcite, dispersed microsphere particles assembled by nano-blocks formed in 20 mM CuCl 2 solution. The surface of Cu 2 (OH) 3 Cl microsphere change from nano-block to nano-rod with increasing the reaction time from 20 min to 2 h Cu 2 (OH) 3 Cl microspheres with surface structure changed from nano-sheet, nano-plate to nano-block with the reaction temperature increase from 37 °C to 70 °C. The Cu 2 (OH) 3 Cl microsphere also displays superior antibacterial properties against S. aureus and E. coli . This work displays a new strategy to synthesize functional materials by the use of dissolution regulation methods.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiao Wang,Bingcheng Lin,Jian Wang,Yunfeng Ma,Rong Jin,Guorui Liu,Minghui Zheng
Four inhibitors (CaO, CaS, CH 4 N 2 S, and (NH 4 ) 2 SO 4 ) were employed to inhibit the formation of multiple unintentional persistent organic pollutants (POPs) and environmentally persistent free radicals (EPFRs) using anthracene as a precursor, with CuCl 2 serving as both a transition metal catalyst and chlorine source. The inhibition mechanisms were elucidated in terms of chlorine immobilization, catalyst deactivation, and free radical regulation. The inhibition efficiency of the four inhibitors on polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polychlorinated naphthalenes (PCNs) ranged from 64.7 % to 98.4 %, with the corresponding inhibition rates on toxic equivalency quantity ranging from 86.3 % to 99.7 %. The distribution of homologs shifted towards less chlorinated species, indicating effective suppression of chlorination. Calcium- and nitrogen-containing compounds consumed chlorine sources by forming CaCl 2 , CaClOH, and NH 4 Cl, while sulfur-containing compounds deactivated catalysts by forming CuSO 4 . EPFRs derived from anthracene were identified as carbon-centered anthracene-type and anthraquinone-type radicals. Positive correlations were observed between POPs and EPFRs concentrations, suggesting the pivotal role of organic free radicals as intermediates in POPs formation. Anthraquinones derived from anthracene underwent decomposition, recombination and chlorination, leading to the formation of PCDD/Fs and PCBs. The addition of inhibitors reduced EPFRs concentrations by 74.2–95.1 %. Sulfur- and nitrogen-containing inhibitors generated radicals that attacked POPs precursors and intermediates, forming heteroatomic compounds and inhibiting POPs formation. These findings enhanced the understanding of the source control mechanisms of POPs and provided theoretical and technical support for the synergistic inhibition of POPs and EPFRs in industrial thermal processes.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Jia Zhao,Yi Yu,Xiaolong Xu,Shuxia Di,Bolin Wang,Hao Xu,Jun Ni,LingLing Guo,Zhiyan Pan,Xiaonian Li
High-valent Au(III) complexes have attracted much attention as catalysts in many reactions. Nevertheless Au(III) catalysts suffer from instability of the oxidized metal complexes during preparation and use. Herein, we demonstrated that Au(III) catalysts can be stabilized against reduction to metallic Au 0 by modifying supported-ionic-liquid-phase-stabilized Au(III) catalyst with CuCl 2 . It was found that the that reduced Au 0 could be re-oxidized in situ to Au 3+ species by CuCl 2 during the reaction and further stabilized by the electron transfer from Cu to these active species. When evaluated in the acetylene hydrochlorination reaction, the Au-Cu-IL/AC catalyst displayed an excellent specific activity with the turnover frequency (TOF) as high as 168.5 h −1 and more than 99.8% selectivity for the product, vinyl chloride (VCM). Furthermore, the Au-Cu-IL/AC catalyst demonstrated a stable catalytic performance with a negligible loss of C 2 H 2 conversion after 500 h under typical industrial reaction conditions for acetylene hydrochlorination. Therefore, the findings of this work provide an efficient approach for designing stable high-valent metals for long-term operation, and also pave the way for the application of Au-Cu-IL/AC catalyst in industrial VCM production.
研究领域:
化学
·
催化科学
·
材料科学
✓ 已验证
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 6
·864
·
IF 2.7
Wanying Gu,Yicheng Zeng,Yuan Deng,Pan Huang,Geyu Jin,Fangze Liu,Jing Wei,Hongbo Li
Lead-free copper halide perovskite nanocrystals (NCs) are emerging materials with excellent photoelectric properties. Herein, we present a colloidal synthesis route for orthorhombic Cs2CuCl4NCs with a well-defined cubic shape and an average diameter of 24 ± 2.1 nm. The Cs2CuCl4NCs exhibited bright, deep blue photoluminescence, which was attributed to the Cu(II) defects. In addition, passivating the Cs2CuCl4NCs by Ag+could effectively improve the photoluminescence quantum yield (PLQY) and environmental stability.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 24
·e202400187
·
IF 2.2
Wen Meng,Chuying Wang,Guangyong Xu,Guigen Luo,Zhengtao Deng
Graphical The Cs3Cu2Cl5 NCs synthesized with MnC2O4 as the defect repair agent exhibited negligible self-absorption, bright and stable luminesces with PL emission at about 535 nm and PLQY can be increased from 68.7 % to 100 %, which is expected to be used as highly efficient light emitter in high-efficiency X-ray scintillator. The toxicity and chemical instability shortcomings of lead halide perovskites are major concerns that continue to motivate the search for next generation alternatives. Copper halides are known to be lead-free, earth-abundant, low-cost, and environmentally friendly, and affordable in optoelectronic performance due to their bright luminescence, tunable emission wavelength, and excellent stability. However, the controlled synthesis of low-dimensional copper halide nanocrystals (NCs) with near-unity photoluminescence quantum yield (PLQY) and high stability remains a great challenge. In this work, we report a reasonable optimization approach for the preparation of Cs 3 Cu 2 Cl 5 NCs by hot-injection colloidal synthesis technology. Specifically, the Cs 3 Cu 2 Cl 5 NCs synthesized with MnC 2 O 4 as the defect repair agent exhibited negligible self-absorption, bright green luminosity with PL emission at about 535 nm and PLQY can be increased from 68.7 % to 100 %. The Cs 3 Cu 2 Cl 5 NCs shows excellent stability and outstanding optical properties, and is expected to be used as highly efficient green light emitter in high-efficiency X-ray scintillator.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiaxing Liu,Xinlin Li,Jialong Zhao,Hongbang Liu,Tao Lin
The development of materials with high luminescence efficiency and long-term stability remains a central goal in advancing high-performance scintillators. In this study, a series of cesium-copper chloride single crystals incorporating iodine ions were successfully synthesized. These crystals exhibit sufficiently large Stokes shifts for eliminating self-absorption, maintain stability over several months, and achieve a photoluminescence quantum yield exceeding 90 %. These characteristics result in a remarkable radioluminescence light yield of up to 56,100 photons/MeV under X-ray irradiation, with a detection limit of 101 nGy/s and a spatial resolution of 13.9 lp/mm in practical imaging tests. The exceptional luminescent performance is attributed to the unique 1D zigzag chain structures, which enable multiple self-trapped exciton emissions. The large binding energies and strong electron-phonon interaction in these structures facilitate exciton formation and recombination.
研究领域:
材料科学
·
光学工程
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）