MATERIALS LETTERS
·
2024
·
IF 2.7
Ying Chen,Minghao Li,Jing Huang,Hui Zeng,Linhua Xu,Jing Su
This paper presents the growth of large-sized CsCu(Br, Cl) 3 crystals using the aqueous solution evaporation method. The structure and the components of the crystals were analyzed. It was found that CsCuBr 3 is a direct bandgap material, while CsCuCl 3 is an indirect bandgap material, and the band gap of CsCu(Br, Cl) 3 halides can be adjusted in the range of 2.63–3.63 eV (PBE) by changing the ratio of Br - /Cl - . Besides CsCuCl 3, which has an absorption valley at 654 nm, the other CsCu(Br, Cl) 3 crystals show high absorption in the range of 200–1000 nm. Under UV excitation, the PL spectra show that CsCu(Br, Cl) 3 crystals exhibit red and blue emission.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2020
·Vol. 45
·期 8
·1293-1299
·
IF 1.544
Xiaomin Song,Qi Huang,Bo Jin,Rufang Peng
To improve the safety of CL-20, rGO was integrated into CL-20 (CL-20/rGO) by in-situ reduction. The prepared composites were characterized by Scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, High-performance liquid chromatography and Power X-ray diffraction, which proves that the presence/encapsulation of rGO on CL-20 surface would not change the molecular structure, amount and crystal form of raw CL-20. In addition, the thermal stability of the composites has improved, while the mechanical sensitivity was desensitized compared to raw CL-20, suggesting this in-situ reduction could be utilized to improve the safety of CL-20.
研究领域:
材料科学
·
爆炸化学
✓ 已验证
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2019
·
IF 4.507
Haotian Li,Feng Liu,Shuhui Wang,Fengjia Wang,Xin Qian,Caiduan Zhang,Yongliang Ma,Lidong Wang
Based on advanced oxidation technology, a new method for the simultaneous removal of SO 2 and NO x from industrial flue gas using Na 2 S 2 O 8 /MgO was proposed. The method does not require the body structure of the wet desulfurization device is changed but adds Na 2 S 2 O 8 to the original equipment to realize simultaneous desulfurization and denitrification. After determining Cl − was additive, the effects of various reaction factors on the simultaneous removal of SO 2 and NO x were investigated, including the Cl − concentration, the initial concentration of the oxidant, the initial pH value of the solution, and the reaction temperature. According to the characterization of removal products and the types of free radicals involved in the reaction by XRD , XPS , and EPR , the reaction mechanism was elucidated. The experimental results indicated that the removal products were mainly sulfates and nitrates. The free radicals involved in the reaction were SO 4 ·− , ·OH, and Cl·, and the key free radical was Cl·.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 21
·215605
·
IF 3.551
Yu-Wei Liu,Shao-Hong Guo,Si-Qi You,Chun-Yi Sun,Xin-Long Wang,Liang Zhao,Zhong-Min Su
Halide perovskites have been employed as photocatalysts for CO2 photoreduction due to their excellent optical properties and unique electronic structure. However, their photocatalytic performance is relatively poor. Herein, we demonstrate a new strategy with Mn-doped CsPb(Br/Cl)3 mixed-halide perovskites as catalysts to enhance the efficiency of CO2 photoreduction. By tuning the content of Mn, a series of CsPb(Br/Cl)3:Mn perovskites are obtained and show high efficiency in CO2 conversion to CO and CH4. For the optimum catalyst sample, especially, the yields of CO and CH4 reach 1917 μmol g−1 and 82 μmol g−1 which are 14.2 and 1.4 times higher than those of CsPbBr3. This work provides new insights into improving the reactivity of perovskites in CO2 photoreduction.
研究领域:
材料科学
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催化化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 34
·e01982
·
IF 2
Ying Wu,Xiaolan Song,Jun Zhang,Yi Wang,Chongwei An
To prepare silica-based composite energetic materials with regular shape, good dispersion, and uniform particle size and thus improve their combustion performance and safety and better apply them in solid propellants, in this study, nSi (nanosilica powder)/NC/CL-20 composite microspheres were prepared by fluid-focused microchanneling with nitrocellulose (NC) as a binder and nSi nanopowder and CL-20 as raw materials via droplet microfluidics. Orthogonal experiments were conducted to determine the optimal process parameters for preparation, ultimately resulting in the successful synthesis of composite microspheres with uniform particle size and good sphericity. Additionally, this study characterized the thermal decomposition properties and combustion performance of three types of composite microspheres (nSi/NC/CL-20, µSi (micron-sized silicon powder)/NC/CL-20, and NC/CL-20). The results showed that the activation energy of nSi/NC/CL-20 reached 530.95 kJ/mol, higher than that of µSi/CL-20/NC (211.19 kJ/mol) and CL-20/NC (210.50 kJ/mol); its 5-second burst point temperature was the highest, reaching 590.33 °C. In terms of combustion performance, nSi/NC/CL-20 exhibited significantly superior maximum pressure (1.22 MPa) and pressure rise rate (1.6 MPa/s) compared to the other two samples. These results clearly demonstrate that the addition of nanosilica powder can effectively improve the thermal stability and combustion performance of composite microspheres. Graphical In this study, droplet microfluidic technology is used to prepare nSi/NC/CL-20 composite microspheres with regular shape, good dispersibility and uniform particle size. Studies show that the addition of nano-silicon powder (nSi) can significantly improve the thermal stability and combustion performance of these composite microspheres, enabling them to be more effectively applied in the field of solid propellants.
研究领域:
材料科学
·
推进剂化学
·
微纳加工
·
燃烧学
·
热分析
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2022
·Vol. 48
·期 2
·e202200192
·
IF 2.134
Qi Huang,Yulan Song,Zhicheng Guo,Jinhao Zhang,Bo Jin,Ya Guo,Rufang Peng
Interface interaction has always been considered a major challenge in the field of desensitization. Co-crystal explosives can balance the properties of energetic materials, but their limited desensitization effect limits their further practical applications. Based on this, we proposed the desensitization of CL-20/HMX co-crystal by three functionalized graphene oxide (NH 2 -GO, Am-GO and M550-GO). The sensitivity results indicate that the M550-GO has the best desensitization. To further explore the reasons for the better desensitization effect of M550, molecular dynamics was used to simulate the binding energy and mechanical properties of different systems. The results showed that the electrostatic interaction between functionalized graphene oxide and CL-20/HMX co-crystal can enhance the interfacial interaction more than van der Waals force. In a word, this work provides new ideas and insights for enhancing the interface interaction of coating materials and popularizing the practical application of co-crystal explosives.
研究领域:
材料科学
·
爆炸物化学
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 37
·17544-17550
·
IF 3.591
Zhen Chen,Hao Zeng,Shujuan Han,Zhihua Yang,Shilie Pan
The chlorine barium nitrate Ba(NO3)Cl was synthesized, for the first time to the best of our knowledge, by using a mild hydrothermal method. Its structure was observed to feature an ABW-type topology (BaCl-ABW) framework, which can be considered as stacks of honeycomb-shaped sheets. Also, Ba(NO3)Cl crystals with dimensions of up to 2 × 1 × 0.5 mm3 were grown. Remarkably, Ba(NO3)Cl was found to exhibit a short UV cutoff edge (below 213 nm) and a markedly enhanced birefringence (Δn = 0.178 @ 1064 nm), about 19 times that of its parent phase BaCl2 (Δn = 0.009 @ 1064 nm). Theoretical calculations indicated that the birefringence enhancement mainly derived from the planar [NO3] triangles.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lingyao Zou,Lu Gan,Wenli Song,Chunying Rong,Lishan Yang,Liping Yu,Zhongyun Ma,Shixun Lian
The rapid development of highly durable electric vehicles has put forward higher requirements for lithium-ion batteries. Li 4 Ti 5 O 12 (LTO) is widely studied owing to its long service life and safety. However, owing to their low electrical conductivity and diffusion, lithium ions have limited practical applications. In this study, Co-Cl co-doped LTO/TiO 2 diphase (LTOT) nanosheets were prepared via the hydrothermal method . The synergistic effect of Co-Cl co-doping reduced the charge-transfer resistance of LTOT and increased the lithium-ion diffusion coefficient , thereby improving the dynamic behavior of the electrode material, which further enhances the rate capability and cycle performance of LTOT. The optimized LTOT:Co-Cl composite exhibited excellent cycle performance and rate capability (the ninth cycle reversible capacities were 253.8, 222.2, 200.1, 185.7, 169.9, 161.3, and 146.3 mAh·g −1 at the current density of 1, 2, 5, 10, 20, 30, and 50 C (1 C = 175 mA·g −1 ) rate, respectively). In addition, LTOT:Co-Cl maintained a capacity of 120 mAh·g −1 after 5000 cycles at 50 C with a retention rate of 83 %, indicating that the average decay rate per cycle is only 0.003 % during the long charge/discharge process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Cheng Zhang,Xihao Pan,Siyao Cheng,Aming Xie,Wei Dong
With the increasingly severe international situation, explosive detection has become an important topic of national security, and the rapid and efficient chemical sensors have attracted people's attention. In this work, a novel sensor CSA was synthesized through cholesterol succinate and 1-Aminopyrene. UV–vis and fluorescence spectra showed that CSA had a typical aggregation-induced emission （AIE） effect in THF/H 2 O solution, and explosive CL-20 could effectively quench this fluorescence. Also, the seal and cotton swab prepared by CSA can specifically detect CL-20, providing a platform for the practical application of CSA in public safety.
研究领域:
化学
·
材料科学
·
国家安全
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Wenqing Li,Shimin Zhang,Songchao Shi,Xin Ruan,Qian Yang,Baoyun Ye,Chongwei An,Jingyu Wang
The proportion of oxidizer in the formulation of composite solid propellants (CSPs) is often more than 50 %. It is very important to explore the preparation of new high-energy oxidizers to improve the energy performance of CSPs. Porous CL-20/FOX-7@AP composite microspheres were prepared by combining high-energy density CL-20 and high safety FOX-7 with traditional oxidant AP through microchannel recrystallization technology coupled with solvent evaporation induced self-assembly technology. The experimental results show that the morphology of porous CL-20/FOX-7@AP composite microspheres is regular, and AP is uniformly attached to the surface of porous CL-20/FOX-7 composite microspheres. Compared with CL-20/FOX-7 composite microspheres, the oxygen balance of CL-20/FOX-7@AP increased from −14.12 % to −8.47 %, and the minimum impact excitation energy of CL-20/FOX-7@AP-1 and CL-20/FOX-7@AP-2 increased by 2.25 J and 3.25 J, respectively. When CL-20/FOX-7@AP-1 and CL-20/FOX-7@ AP-2 were used as new oxidants to replace 10 % AP in CSPs formula, the burning rate increased by 21.52 % and 27.85 % respectively, and the pressurization rate increased by 69.79 % and 75.44 % respectively. CL-20/FOX-7@AP composite microspheres with a porous synergistic core-shell structure are expected to be used as novel high-energy oxidants in CSPs to improve the energy density and energy release efficiency of CSPs.
研究领域:
材料科学
·
推进剂技术
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Yubin Li,Zhijian Yang,Ling Ding,Liping Pan,Jianhu Zhang,Xue Zheng,Congmei Lin
Damages generated in functional materials can deteriorate their performance and shorten their lifetime, endowing the materials with self-healing ability is expected to resolve this problem. In this work, a novel energetic composite refers to CL-20 based PBX, which can self-heal its mechanical damage under a mild condition, was designed and prepared via incorporating disulfide bonds into the polymeric binder. The highly efficient self-healing polyurethane-urea containing disulfide bonds (DSPU) was synthesized by using the prepolymer of poly(caprolactone) diol (PCL-diol) with isophorone diisocyanate (IPDI) as the main-chain to achieve good mechanical toughness, then cross-linking with bis(4-aminophenyl) disulfide (APD) to gain the superior reversibility. The CL-20 based PBX using this DSPU as binder can evidently self-heal its inner damage, i.e. micro-crack, after heating at 60 °C for several hours, and the strength of the damaged sample after Brazilian test can also be recovered to more than 70% of the pristine value.
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
CORROSION SCIENCE
·
2023
·
IF 8.3
Shupei Liu,Xinfang Zhang,Jinsong Rao,Liang Yu,Wei Lu,Huan Zhou,Shibo Chen,Yuxin Zhang,Xiaoying Liu
Ni-Co Layered Double Hydroxide (LDH) shows great application potential in the field of anti-corrosion. However, the poor carrying capacity limits the performance of anticorrosion performance. In this study, Ni-Co hydrotalcite was grown on the surface of DE, and Ni-Co/DE@SP microcapsule with corrosion inhibitor loading up to 14.7% was successfully prepared. The adsorption capacity of Ni-Co/DE@SP for Cl − in 600 mmol/L NaCl solution was 6.72 mmol/g. It is worth noting that the impedance modulus of the prepared composite coating (EP/Ni-Co/DE@SP) is two orders of magnitude higher than that of the pure resin coating, and the wear resistance was improved by 33%.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 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）