Journal of Energetic Materials
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2026
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IF 1.8
Yigong Sun,Xiaolan Song,Jun Zhang,Feijuan Ma,Yi Wang,Chongwei An
In the pursuit of high-efficacy, low-visibility infrared illuminants, three distinct formulations were developed: I-1, composed of nitrocellulose (NC); I-2, containing glycidyl azide polymer (GAP); and I-3, a composite of NC and GAP. Among these, formulation I-3 demonstrated an exemplary equilibrium, achieving a burn duration of 62 seconds coupled with enhanced irradiance. Molecular dynamics simulations revealed that the rigid structure of nitrocellulose and the flexible chains of glycidyl azide polymer amalgamate to form a dense microarchitecture (with a free volume of 13.17% and a cohesive energy density of 464.0 J/cm³). This microstructural arrangement significantly contributes to improved combustion stability and radiative efficiency. This investigation offers essential mechanistic insights that advance the development of high-performance, low-signature pyrotechnics.
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INORGANIC CHEMISTRY
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2026
·
IF 4.6
Jingdong Yan,Xiangran Kong,Zichang Wang,Hongwei Leng,Tao Liu,Yunfei Shang,Nikolay Nikolaevich Yudin,Zuotao Lei,Chunhui Yang
Precise structural design is vital for advancing high-performance birefringent crystals used in mid-infrared polarizing devices. Mixed anion systems, particularly chalcohalides, present a promising avenue by synergistically combining the broad infrared transparency of chalcogenides with the band gap-widening capability conferred by halide ions. Guided by this approach, a novel chalcohalide birefringent crystal, Ba4CdGa2S6F4, was successfully designed and synthesized by the cation and anion cosubstitution strategy. This compound was derived from the parent phase Ba5Ga2S8 by partially replacing one Ba2+ cation with one Cd2+ cation and two S2– anions with four F– anions. Optical characterization via the UV–vis-NIR diffuse reflectance measurement reveals that Ba4CdGa2S6F4 exhibits a large optical band gap of 3.78 eV. And the broad infrared transparency of Ba4CdGa2S6F4 is confirmed for the material via both Raman and Fourier transform IR spectroscopy. First-principles calculations indicate that Ba4CdGa2S6F4 has moderate birefringence with a value of 0.057 at 1064 nm, representing a 26.6% increase over the parent compound Ba5Ga2S8. This work not only reports a promising infrared birefringent crystal with large band gap but also demonstrates that the cation and anion cosubstitution is an effective strategy for designing novel functional crystalline materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Dandan Zhu,Qixing Zhou
In this work, nitrogen doped g-C 3 N 4 (NCN) with the extremely narrow band gap was prepared and applied for the photodegradation of phenols. Experiments and DFT (the density functional theory) computation identified that N-doping introduced in the g-C 3 N 4 matrix by substituting C atoms. DFT, PL (photoluminescence) spectra, optical property characteristic and PEC (photoelectrochemical) indicated that NCN possess extremely narrow band gap, efficient photogenerated carrier separation and the charge transfer, which enhanced the absorption of visible light and further promoted the photocatalytic activity. As a result, NCN(2:2) showed about twice higher photodegradation efficiencies and 3 times rate constant than pristine g-C 3 N 4 . The radical trapping experiments showed that •O 2 - radical and h + served as crucial active species during the whole photodegradation reaction. This work can provide a strategy to enhance the photocatalytic activity of photocatalysts via introduce foreign atoms in matrix.
研究领域:
材料科学
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环境科学
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理论化学
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xuanxuan Hua,Xiaodi Mao,Shuang Yang,Meijie Zhang,Lvping Fu,Cangjuan Han,Ao Huang,Huazhi Gu
Typical infrared (IR) radiation materials, such as spinel structure with transition metal doping , remain challenges on IR radiation performance and thermal stability. Inspired by manipulatable entropy with desired properties, (Mg 1/5 Co 1/5 Ni 1/5 Cu 1/5 Zn 1/5 )Al 2 O 4 (5MAl 2 O 4 ) with improved infrared radiation property and reduced thermal conductivity has been successfully synthesized. High-entropy strategy significantly narrows the band gap by impurity energy level formation, resulting in an improved 0.91 (0.78–2.5 μm). Simultaneously, 5MAl 2 O 4 emerges site inversion (tetrahedral and octahedral sites) and lattice distortion which benefits the outstanding infrared emissivity of 0.94 (2.5–15 μm, measured at 800 °C). Furthermore, 5MAl 2 O 4 reaches fairly low thermal conductivity of 2.1 W·m −1 ·K −1 , 4–5 times decrease compared with MAl 2 O 4 end members. The remarkable infrared emissivity and low thermal conductivity offer great potential in energy conservation and heat dissipation.
研究领域:
材料科学
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热能工程
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ACS Applied Materials & Interfaces
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2020
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IF 8.758
Jing Li,Wenjin Yang,Aimin Wu,Xinglai Zhang,Tingting Xu,Baodan Liu
A (GaN)1–x(ZnO)x solid solution as a promising visible-light-driven photocatalyst for overall water splitting has attracted extensive attention. In this work, we proposed a template reactive strategy toward the synthesis of band-gap tunable 2D (GaN)1–x(ZnO)x nanosheets as thin as 14 nm to reduce the carrier transportation path and thus efficiently decrease the recombination of electrons and holes. It is demonstrated that the template strategy enables an ideal morphology and structure transformation from hexagonal 2D ZnGa2O4 nanosheets to 2D (GaN)1–x(ZnO)x nanosheets in the nitridation process. After the modification of 1 wt % of Rh cocatalyst, the flowerlike (GaN)0.89(ZnO)0.11 nanosheets show an enhanced hydrogen evolution in pure water (pH 4.5).
研究领域:
材料科学
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能源化学
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 24
·15607
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IF 6.208
Junzhao Yuan,Xiaoqian Huang,Yumeng Zhao,Jianhong Gu,Yan Yuan,Zongping Liu,Hui Zou,Jianchun Bian
Gap junction protein connexin 43 (Cx43) plays a critical role in gap junction communication in rat hepatocytes. However, those located between hepatocytes are easily internalized following exposure to poisons. Herein, we investigated the potential of buffalo rat liver 3A (BRL 3A) cells to generate annular gap junctions (AGJs) proficient at alleviating cadmium (Cd) cytotoxic injury through degradation via an endosome–lysosome pathway. Our results showed that Cd-induced damage of liver microtubules promoted Cx43 internalization and increased Cx43 phosphorylation at Ser373 site. Furthermore, we established that Cd induced AGJs generation in BRL 3A cells, and AGJs were subsequently degraded through the endosome–lysosome pathway. Overall, our results suggested that Cx43 internalization and the generation of AGJs were cellular protective mechanisms to alleviate Cd toxicity in rat hepatocytes.Keywords:annular gap junction;cadmium;connexin 43;endosome;lysosome;microtubule
研究领域:
细胞生物学
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毒理学
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分子生物学
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2015
·Vol. 17
·期 43
·29354-29362
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IF 4.493
Xia Cui,Yi Fan Zheng,Hao Yong Yin,Xu Chun Song
In this study, C3N4/Zn1−xCdxS (0 ≤ x ≤ 1) heterostructures with adjustment of the band gap were successfully prepared by calcination and a hydrothermal synthesis method. The photocatalytic properties of C3N4/Zn1−xCdxS composite photocatalysts were evaluated by the photocatalytic degradation of RhB under visible light irradiation. The results showed that the combination of the two semiconductor photocatalysts (C3N4 and Zn1−xCdxS) greatly enhanced the photocatalytic degradation efficiency of RhB compared to the pure C3N4 and Zn1−xCdxS under visible light irradiation. Among them, the 0.1C3N4/Zn0.8Cd0.2S composite photocatalyst exhibited the highest photocatalytic activities with the degradation efficiency of RhB arriving to 97.9% within 90 min. The remarkable photocatalytic activity of the 0.1C3N4/Zn0.8Cd0.2S composite photocatalyst was mainly attributed to the appropriate band structure and the effective separation of photogenerated electron–hole pairs. Additionally, a possible basic mechanism of the composite semiconductor photocatalytic process was also discussed. Moreover, it was also investigated that O2˙− and h+ were the main reactive oxidative species in this photocatalytic process of the degradation of RhB on the 0.1C3N4/Zn0.8Cd0.2S heterostructure photocatalyst.
研究领域:
材料科学
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环境科学
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光催化
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DALTON TRANSACTIONS
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2021
·Vol. 50
·期 45
·16562-16567
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IF 4.39
Ru-Ling Tang,Xin Lian,Wen-Dong Yao,Wenlong Liu,Sheng-Ping Guo
Metal halides have potential applications in many optics-related fields, such as birefringence materials. Here, a pentanary fluoride K3Na(TaF7)(SiF6) has been obtained through a facile hydrothermal route. It crystallizes in the orthorhombic space group Immm, and its zero-dimensional framework features isolated SiF6 octahedra and TaF7 monocapped trigonal prisms, a new type of combination representing a new structure-type. It exhibits two wide optical band gaps of 4.46 eV and 5.67 eV which is consistent with DFT calculation. K3Na(TaF7)(SiF6) exhibits a larger birefringence (0.045 at 253.7 nm) compared with the commercial MgF2 crystal.
研究领域:
材料科学
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光学
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SOLAR ENERGY
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2021
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IF 5.742
Daoyong Zhang,Shizhong Sun,Xinyu Li,Xiang Li,Xin Liu,Qiulian Li,Hua Liao,Shurong Wang
In this paper, Cu 2 ZnSn(S x Se 1− x ) 4 (CZTSSe) thin-films with a front-graded band gap were prepared by plasma sulfurization. The method of selenization followed by low-temperature plasma sulfurization was adopted to effectively control the uneven diffusion of S in the absorption layer. By investigating and analyzing the grazing incidence X-ray diffraction, Raman spectroscopy, and PL spectra, the CZTSSe absorption layer with an S-rich top and S-poor bottom layer could be obtained by plasma sulfurization. The inhomogeneous distribution of S led to the formation of band gap gradients. Based on that, the band gap near the top of the absorption layer was determined to be 1.13 eV and the bottom band gap was 1.03 eV. Approximately 300 nm thick sulfur-rich CZTSSe films were found near the surface favoring an increase in the band gap at the interface, which could be attributed to a high open circuit voltage (V oc ). The establishment of the band gap gradient formed a barrier towards the motion of holes towards the interface and increased the effective interfacial recombination band gap, both of which significantly reduced the interfacial recombination. Finally, the CZTSSe thin-film solar cells with a band gap gradient were prepared by plasma sulfurization exhibited a power conversion efficiency (PCE) of 8.11%. Compared with CZTSSe thin-film solar cells without post plasma sulfurization, which had a PCE of 6.98%, the V oc of the CZTSSe solar cell improved considerably from 471.37 mV to 513.93 mV; however, it had little effect on short-circuit current density (J sc ).
研究领域:
材料科学
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光伏技术
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Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Yue Guan,Chenchen Zhang,Zhihui Liu,Liang Zhang,Jianqiang Meng
Current loose nanofiltration membrane materials are not suitable for harsh dye/salt separation environments because they are not resistant to high temperatures, acids and bases, and organic solvents. In this work, a polybenzimidazole (PBI) hollow fiber loose nanofiltration membrane (HFLNM) was prepared by dry-wet spinning and used for dye and salt separation. The membrane showed good heat resistance (25–70 ℃), acid resistance (immerse in10 mol/L HCl solution for 100 h) and solvent resistance (immerse in EtOH, MeOH and IPA for 120 h, respectively). The effects of air gap distance on the membrane structure and properties as well as the effect of cross-linking using K 2 S 2 O 8 on the solvent resistance of the membrane were investigated. By adjusting the air gap distance to 6 cm, the dense layer of the optimized membrane got thinner. With the help of double layer finger-like pore and strong negative charge, the membrane exhibited outstanding water flux (64.5 L·m −2 ·h −1 ), low NaCl salt rejection (∼ 7%), and excellent Congo Red (CR) dye rejection (100%) at the dye/salt mixture solution (100 mg/L Congo red, 1 g/L NaCl) and operating pressure of 0.1 MPa. Moreover, the crosslinked PBI membrane showed good stability after 72 h immersion in polar aprotic solvents (NMP, DMF , and DMAc). Hence, PBI HFLNM has a good application prospect in the field of dye/salt separation in harsh environments.
研究领域:
膜科学
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材料科学
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环境工程
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化学工程
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JOURNAL OF POWER SOURCES
·
2023
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IF 9.2
Shiguo Jin,Zhuo Chen,Shuai Bai,Yining Zhang
The commercialization of the Zn-metal battery is hindered by dendrites and side reactions on the Zn anode. Here, the BaSO 4 coating is designed to address the problem of the Zn anode. The porous structure of the BaSO 4 coating improves the wettability to induce relatively uniform electrolyte flux and inhibits the two-dimensional diffusion of Zn 2+ , suppressing the growth of dendrites on the Zn anode. The BaSO 4 leads to a “space charge polarization” to promote the separation of positive and negative charge centers, the electrostatic effect promotes the transportation of Zn 2+ and reduces the occurrence of side reactions. Consequently, the BaSO 4 @Zn||BaSO 4 @Zn battery displays a longer lifespan (122 h–1200 h) and a lower polarization (74.0 mV–47.2 mV) at 2 mA cm −2 . The full battery exhibits an extended lifespan (3000 cycles) and a stable coulombic efficiency at 5 A g −1 when coupled with the K 2 V 6 O 16 ·1.5H 2 O (KVO) cathode. This work serves as a reference for solving problems and promoting the application of the Zn-metal battery.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Wei Cai,Chunlin Fu,Rongli Gao,Weihai Jiang,Xiaoling Deng,Gang Chen
Ti-doped bismuth ferrite thin films were prepared via sol–gel spin-coating method. The effects of titanium on the microstructure, optical, leakage, ferroelectric and photovoltaic characteristics have been investigated systematically. The result shows that bismuth ferrite thin films doped with 0–8 at.% Ti are rhombohedral distortion perovskite structure. The addition of titanium inhibits the grain growth and enhances the thickness uniformity and can decrease the band gap of bismuth ferrite thin films. The leakage current of bismuth ferrite thin films is effectively reduced by adding a certain amount of titanium and the leakage mechanism has been investigated. Addition of titanium increases the remnant polarization of the films. As titanium content increases, the short circuit photocurrent density decrease first and then increase, while the open circuit photovoltage increase first and then decrease. The power conversion efficiency of Ti-doped bismuth ferrite thin films increases as titanium content increases, which can be explained as a result of the increased remnant polarization and decreased band gap.
研究领域:
材料科学
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光伏技术
·
物理学
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