CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Ying Long,Xuehua Dong,Lin Qi,Lindong Luan,Zichen Ren,Zhien Lin,Guohong Zou
Balancing large birefringence with ultraviolet (UV) transparency remains a central challenge in the development of birefringent crystals. Herein, we report two Sb(III)-based hypophosphites, Sb(H2PO2)2Cl and Sb(H2PO2)2F, and comparatively investigate their crystal structures and optical properties. Single-crystal X-ray diffraction analysis shows that Sb(H2PO2)2Cl crystallizes in a wave-like two-dimensional (2D) layered structure, whereas Sb(H2PO2)2F adopts a 1D chain structure. Optical measurements reveal that Sb(H2PO2)2F exhibits a markedly enhanced birefringence of 0.205 at 546 nm, compared with 0.055 for Sb(H2PO2)2Cl, in good agreement with DFT-calculated values of 0.211 and 0.041, respectively. Meanwhile, Sb(H2PO2)2F retains a wide band gap of 4.81 eV and a short UV cutoff edge of 258 nm, indicating a favorable balance between optical anisotropy and UV transparency. Further structure–property analysis suggests that the enhanced birefringence of the fluoride is closely associated with the more favorable orientational efficiency of the stereochemically active lone pair on Sb3+. These results demonstrate that halogen substitution is an effective approach for tuning optical anisotropy in UV-transparent Sb(III)-based hypophosphites.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Keer Tan,Jinping Zhao,Linfa Bao,Linjun Shao,Hanyun Liu,Yishuo Dong,Peng Yang
Catalytic combustion is a widely used technology for volatile organic compounds (VOCs) abatement, in which highly active catalysts play a key role. However, catalyst is prone to poisoning during the degradation of VOCs. In order to study anti-poisoning performance, the Cl, S and P heteroatoms were artificially introduced, and the corresponding doped CuO-ZrO 2 catalysts were prepared via a salicylic acid-assisted sol-gel method. The effects of heteroatom doping on the structure, acidity, redox properties and catalytic performance were systematically studied. The results showed that Cl, S and P doping effectively tuned the catalyst structure, active species dispersion and surface Lewis/Brønsted acid sites, which exerted a meaningful influence on catalytic performance of catalysts in the degradation of VOCs pollutants. In addition, compared with the undoped CuZrO, Cl-CuZrO exhibited the highest catalytic performance for degradation of toluene, chlorobenzene and p-chlorotoluene, indicating that the CuO-ZrO 2 catalyst system possessed excellent chlorine resistance. Meanwhile, S-CuZrO showed comparable performance to CuZrO, which demonstrated that the CuO-ZrO 2 catalysts had a certain degree of sulfur resistance. Through the design and optimization of heteroatom doping, this work provided valuable insights for enhancing the catalytic efficiency and structure stability of CuO-ZrO 2 based catalysts.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Wenbin Tang,Jin Shen,Zhongjie Shen,Jiawei Wang,Haifeng Liu
The four-step Cu–Cl thermochemical hydrogen production cycle can effectively convert heat energy into hydrogen energy, and the thermolysis reaction is the key stage for connecting the upstream and downstream reactions. This study focused on the influence of different upstream hydrolysates (Cu2OCl2 or CuO) on thermolysis and the different reaction mechanisms. The micromorphological changes during the reaction process, the specific information on the precipitated gases, and the effect of temperature and reaction time on the main and byproducts were analyzed. The results showed that the maximum CuCl yields of 84.58 and 82.26% were obtained from the thermolysis of Cu2OCl2 and CuCl2–CuO equimolar mixtures. During the reaction, both reaction feedstocks shrink and then melt and start to precipitate O2 at 430 and 415 °C, respectively. For the thermolysis of CuCl2–CuO mixtures, an excess of CuCl2 contributes to the main reaction. Finally, the complex reaction mechanism of thermolysis and product regulation was revealed.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Muhammad Amin Padhiar,Minqiang Wang,Yongqiang Ji,Zhi Yang,Yun Zhou,Hengwei Qiu,Hao Wang,Azaz Ali Shah,Arshad Saleem Bhatti
Perovskite nanocrystals (PNCs) are ideal for optical devices due to their adjustable emission band and high photoluminescence. However, blue light-emitting perovskite nanocrystals (PNCs) exhibit poor performance compared to their green and red-emitting PNC counterparts. Herein, we introduce a simple strategy for increasing the stability of blue light-emitting CsPb (Br/Cl)3 PNCs passivated with an Al-doped CdSe layer. This simple strategy successfully achieves highly stable PNCs with photoluminescence (PL) emission ranging from 454 to 460 nm with a full width at half-maximum (FWHM) ranging from 18 to 22 nm; changes in bandgaps are also observed, and the corresponding PLQY values show a significant change after CdSe/Al modification. In addition, CsPb (Br/Cl)3 PNCs with a CdSe layer doped with Al formed on the surface show remarkable stability under ambient conditions, including thermal exposure, water resistance, and ultraviolet (UV) irradiation. A light-emitting diode (LED) device was constructed to demonstrate the feasibility of the approach by combining the optimal CsPb(Br/Cl)3/CdSe/Al PNCs with an existing commercial 365 nm UV chip, resulting in bright blue light emission with CIE color coordinates of (0.16, 0.09). All of the findings suggest that doped CsPb (Br/Cl)3/CdSe/Al PNCs have the potential to be used as color converters in liquid crystal displays (LCDs).
研究领域:
材料科学
·
光学工程
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 4
·1940-1947
·
IF 2.936
Pengchao Wang,Bohua Dong,Zhenjie Cui,Rongjie Gao,Ge Su,Wei Wang,Lixin Cao
Metal-halide perovskite nanocrystals (NCs) are considered to be promising types of optoelectronic and photonic materials. The emission colors of the cesium lead halide perovskite (CsPbX3, X = Cl, Br, I) NCs depend on the joint influence of the emission peaks of the host and its dopant ions. Herein, we report a phosphine-free strategy to synthesize Mn-doped CsPb(Cl/Br)3 NCs to tune their optical properties in a wide color gamut. Colloidal Mn-doped CsPb(Cl/Br)3 NCs were synthesized by injecting Cs-oleate solution into the MnCl2 and PbBr2 precursor solution. The as-prepared Mn-doped CsPb(Cl/Br)3 NCs are highly crystalline and uniform sized nanocubes with two emission peaks, including the host emission around 450 nm and the Mn2+ dopant emission around 600 nm, which are sensitive to the MnCl2-to-PbBr2 molar feed ratio and the reaction temperature. By varying the MnCl2-to-PbBr2 molar feed ratio or the reaction temperature, the relative PL intensities of dual color emission can be manipulated, showing their ability in tunable color output.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光子材料
·
无机化学
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Shuyan Qi,Yang Wang,Ling Guan,Xu Hu,Haiyang Li
This study addresses antibiotic water pollution by synthesizing Zr-doped Bi₂₄O₃₁Cl₁₀ (Bi₂₄(₁₋ₓ)Zr₁₈ₓO₃₁Cl₁₀) photocatalysts via hydrothermal method for tetracycline hydrochloride (TC-HCl) removal. Zr doping ratios (6–14%) were systematically investigated, with the optimal BZOC4 (12% Zr) degrading 91.24% of 20 mg/L TC-HCl within 120 min under 500 W xenon lamp irradiation (pH = 9). Its reaction rate constant (0.0239 min −1 ) is triple that of pristine Bi₂₄O₃₁Cl₁₀. Zr doping reduces the band gap from 3.12 eV to 2.8 eV, improves visible light utilization (absorption edge red-shifted to 525 nm), accelerates electron transfer, and reduces e − /h + recombination—supported by UV –Vis DRS, PL, and electrochemical tests. Superoxide radicals (O₂ − ·) and holes (h + ) are primary active species, confirmed by radical trapping and ESR. TOC analysis confirms 32.4% mineralization of TC-HCl to CO₂ and H₂O.This work offers new design strategies for bismuth halide-based photocatalysts in antibiotic remediation by integrating structural regulation and electronic modulation via Zr doping.
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ACS Omega
·
2022
·
IF 4.132
Bin Yuan,Yu Zhang,Ke-xin Wang,Tian-ping Wang,Yan Li,Shun-guan Zhu,Lin Zhang,Zhen-xin Yi,Hua Guan,Chen-guang Zhu
The energetic performance of hexanitrohexaazaisowurtzitane (CL-20) was modulated with two energetic coordination polymers (ECPs), [Cu(ANQ)2(NO3)2] and [Ni(CHZ)3](ClO4)2, in this study by a two-step method. First, tannic acid polymerized in situ on the surface of CL-20 crystals. Then, [Cu(ANQ)2(NO3)2] and [Ni(CHZ)3](ClO4)2 were hydrothermally formed on the surface of CL-20/TA, respectively. Explosion performance tests show that the impact sensitivity of the coated structure CL-20/TA/[Cu(ANQ)2(NO3)2] is 58% less than that of CL-20 with no energy decrease. On the other hand, CL-20/TA/[Ni(CHZ)3](ClO4)2 can be initiated by a low laser energy of 107.3 mJ (Nd:YAG, 1064 nm, 6.5 ns pulse width), whereas CL-20 cannot be initiated by even 4000 mJ laser energy. This study shows that it is feasible to modify the performance of CL-20 by introducing energetic CPs with certain properties, like high energy insensitive, laser-sensitive, etc., which could be a prospective method for designing high energy insensitive energetic materials in the future.
研究领域:
含能材料
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材料化学
·
火炸药工程
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wenwen Liu,Teng Zhang,Baohua Zhao,Chengben Liu,Youru Bai,Zhi Li,Shihui Zhu,Tailin Wang,Xinyu Sun,Heyuan Liu,Zhaobin Liu,Yanli Chen,Xiyou Li
The nonradiative carrier recombination at the perovskite/carrier selective layer (CSL) interface was accounted for the inferior power conversion efficiency (PCE) of perovskite solar cells (PSCs), especially rigid all-inorganic perovskite (CsPbI3 and CsPbBr3). In this study, targeting the poor interface, we introduce SbX3 (X = Cl, Br, I) surface passivation at the CsPbBr3/carbon interface. Smoothed compressive strain, reduced defect density, and enhanced energy-level alignment were achieved simultaneously, facilitating carrier extraction at the selective interface. With the simple aqueous solution-based two-step process, the PCE of our SbI3 passivated carbon-based CsPbBr3 PSCs has increased from 7.81% (without passivation) to 9.69%, a ∼25% enhancement. Specifically, Voc (1.657 V) of the SbI3-passivated cells was much higher than that of the control ones (1.488 V), confirming the ameliorated interface. Finally, our unencapsulated SbI3 passivated devices maintain 90% of their initial PCEs while left in the air for 30 days with a relative humidity of 60%. To conclude, we present an interfacial carrier extraction-enhanced strategy for preparing high-performance and stable CsPbBr3-based PSCs.
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PubMed
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 17
·175603
·
IF 3.953
Chen Chen,Lei Nie,Yizhe Huang,Shuang Xi,Xingyue Liu,Xiwen Zhang,Tielin Shi,Guanglan Liao,Shiyuan Liu,Zirong Tang
Herein, we develop a novel strategy for preparing all-inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals (NCs)@Zn-based metal-organic framework (MOF) composites through interfacial synthesis. The successful embedding of fluorescent perovskite NCs in Zn-MOFs is due to the in situ confined growth, which is attributed to the re-nucleation of water-triggered phase transformation from Cs4PbBr6 to CsPbBr3. The controllable synthesis of mixed-halide based composites with various emission wavelength can be achieved by adding the desired amount of halide (Cl or I) salts in the re-nucleation process. More importantly, the anion exchange reaction is inhibited among various composites with different halogen atoms by being trapped in MOFs. Besides, a white light-emitting diode (WLED) is produced using a blue LED chip with the green-emitting and red-emitting composites, which has a color coordinate of (0.3291, 0.3272) and a wide color gamut. This work provides a novel route to achieving perovskite NCs growth in MOFs, which also can be extended to the other NCs embedded in frames as well.
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2021
·
IF 8.301
C. Chen,H. Li,J. Yi,Z. Qin,C. Wang,Z. Sun,Y. Xu,S. Xu,F. Zhao
The study of multiple complex catalytic mechanisms is currently one of the great scientific issues for the application of high-energy solid propellants . Two novel heterobimetallic metal-organic frameworks (MOFs), Ba 4 Pb 4 (CH 3 CO 2 ) 8 [(CH 6 CO 2 ) 4 Pb](CH 3 CO 2 ) 4 (PbBa-MOF) and Ba 2 Ni(CO 2 H) 6 (OH 2 ) 4 (NiBa-MOF), were prepared via the solvothermal method, and their structures and composition were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectroscopy (FTIR) techniques and N 2 adsorption/desorption experiment. The thermal decomposition characteristics of the two MOFs and their catalytic performances on the hexanitro hexaazaisowurtzitane (CL-20) thermolysis were also studied by differential scanning calorimetr (DSC) and thermogravimetric-fourier transform infrared spectroscopy-mass spectrum (TG-FTIR-MS) methods. The results showed that the NiBa-MOF presented a lower initial decomposition temperature than the PbBa-MOF, and the difference of the MOFs structures affected the starting point of thermal decomposition. Compared with the pure CL-20, the thermolysis peak temperature and apparent activation energy ( E a ) of the CL-20/PbBa-MOF mixture were decreased by 2.2 °C and 23.76 kJ‧mol −1 , respectively. The E a of CL-20/NiBa-MOF mixture was lower and 42.01 kJ‧mol −1 , indicating the better catalytic activity of NiBa-MOF. The thermolysis catalytic mechanisms were studied by analyzing the transformation of gas products during the pyrolysis of mixtures. The effect of these two MOFs on the CL-20 thermolysis is primarily owing to the strong attraction of metal cations to electronics, bimetallic synergistic catalysis, and the release of active free radicals. Furthermore, the laser ignition and flame propagation features showed that these two MOFs reduced the minimum ignition power density and ignition delay time of the CL-20, and the flame becomes brighter and more luminous. The influence of the two MOFs on the flame bright spot of CL-20 based mixtures was described.
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CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Linyuan Lian,Moyan Zheng,Peng Zhang,Zhi Zheng,Kang Du,Wen Lei,Jianbo Gao,Guangda Niu,Daoli Zhang,Tianyou Zhai,Shengye Jin,Jiang Tang,Xiuwen Zhang,Jianbing Zhang
Self-trapped excitons (STEs) in metal halide materials are attracting an increasing level of interest due to their unique light emission properties. Light emission from STEs in metal halides is usually associated with excited-state structural deformation, which lowers the symmetry of local structures, as seen for the STEs in a wide range of materials systems. Here, we reveal a prototypic STE-associated structural “distortion” that, however, enhances the symmetry of local structures, in a series of all-inorganic copper(I)-based halides Cs3Cu2X5 (X = Cl, Br, or I). We further find that the emission peaks of Cs3Cu2X5 blue-shift when the halogen changes from Cl to Br to I, which is the opposite of the trends found in traditional halide perovskites. This phenomenon is attributed to a synergetic combination of the significant change in band gap associated with structural deformation and a strong excitonic effect. Due to the highly localized electron and hole upon photoexcitation, Cs3Cu2Cl5 shows an extremely long and temperature-sensitive photoluminescence (PL) lifetime among metal halide materials with STEs. Remarkably, strong green emission with a PL quantum yield exceeding 90% is found in Cs3Cu2Cl5, opening the way to designing light emission compounds based on local symmetry-enhancing STE mechanisms.
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高影响因子
FUEL
·
2023
·
IF 7.4
Jiaxin Su,Yan Hu,Bin Zhou,Lizhi Wu,Yinghua Ye,Ruiqi Shen
Because of its high energy density, hexanitrohexaazaisowurtzitane(CL-20) has been widely used in propellants in place of conventional oxidizers. The adjustable burning rate of the CL-20 is a key factor in adapting the propellant to various environments. In this work, the effects of graphene oxide(GO) content on the thermal release, ignition and combustion characteristics of micro and nano CL-20 were thoroughly conducted based on the differential scanning calorimetry measurements (DSC), laser ignition, burning rate test and condensed combustion products collection. The results show GO has a positive effect on micro and nano CL-20 in ignition performance and a negative effect on combustion rate. Owing to the addition of GO, the original flameless combustion of CL-20 changes to flaming combustion. With increasing GO content, the burning rates of micro and nano CL-20 show completely different descending laws. Furthermore, the combustion mechanism of nano and micro CL-20/GO has been studied in detail. The burning rate of micro CL-20/GO is primarily determined by the condensed phase, and that of nano composite is controlled by both of the condensed and gas phases. This work provides a deeply insight into the influence mechanism of GO on the properties of nano and micro CL-20.
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