Science Advances
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2022
·Vol. 8
·期 23
·
IF 14.957
Peixin Zhang,Yao Zhong,Yan Zhang,Zhenliang Zhu,Yuan Liu,Yun Su,Jingwen Chen,Shixia Chen,Zheling Zeng,Huabin Xing,Shuguang Deng,Jun Wang
One-step separation of C 2 H 4 from ternary C 2 H 2 /C 2 H 4 /C 2 H 6 hydrocarbon mixtures is of great significance in the industry but is challenging due to the similar sizes and physical properties of C 2 H 2 , C 2 H 4 , and C 2 H 6 . Here, we report an anion-pillared hybrid ultramicroporous material, CuTiF 6 -TPPY, that has the ability of selective recognition of C 2 H 4 over C 2 H 2 and C 2 H 6 . The 4,6-connected fsc framework of CuTiF 6 -TPPY exhibits semi–cage-like one-dimensional channels sustained by porphyrin rings and TiF 6 2− pillars, which demonstrates the noticeably enhanced adsorption of C 2 H 2 and C 2 H 6 over C 2 H 4 . Dynamic breakthrough experiments confirm the direct and facile high-purity C 2 H 4 (>99.9%) production from a ternary gas mixture of C 2 H 2 /C 2 H 6 /C 2 H 4 (1/9/90, v/v/v) under ambient conditions. Computational studies and in situ infrared reveal that the porphyrin moieties with large π-surfaces form multiple van der Waals interactions with C 2 H 6 ; meanwhile, the polar TiF 6 2− pillars form C–H•••F hydrogen bonding with C 2 H 2 . In contrast, the recognition sites for C 2 H 4 in the framework are less marked.
研究领域:
材料科学
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化学工程
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物理化学
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吸附分离
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多孔材料
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2020
·Vol. 103
·期 10
·5664-5677
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IF 3.502
Yao Ji,Yongbao Xiao,Shujing Huang,Weichao Wang
Fluoro-sulfo-phosphate (FPS) glass is of current interest as potential material for laser application due to its good glass-forming ability, thermal, and chemical stability as well as the complicated local environment for incorporated species. Herein, the physical and luminescent properties of Er 3+ and Yb 3+ /Er 3+ -doped FPS glasses vs S/F ratio are investigated comprehensively. The low melting temperature (750°C) leads to fewer ingredients evaporation and easier operation. The sulfate addition depolymerizes the structure of FPS glasses, leading to either monotonic or nonmonotonic variations of physical properties, while no deterioration in thermal and limited one in chemical stability is caused. The addition of sulfate also modifies the local structure around optical active species and thus, leading to higher emission cross section (1.52 × 10 −20 cm 2 ), effective linewidth (68.4 nm), figure of merit (5.61 × 10 −23 s cm 2 ), gain bandwidth (102.44 × 10 −27 cm 3 ), and energy-transfer microparameters (51.87 × 10 −39 cm 6 /s), implying high possibility to serve as 1.5 μm laser application.
研究领域:
材料科学
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光学
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激光物理
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DOI
高影响因子
Journal of Materials Chemistry C
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2022
·Vol. 10
·期 20
·8061-8069
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IF 8.067
Xicai Liu,Huan Wang,Dongcheng Yang,Fangli Jing,Hailong Qiu,Hongjun Liu,Zhanggui Hu
Trivalent lanthanoid ions (Ln3+) with substantial inherency have been utilized in luminescent materials and photonic devices for decades. Because the periodic physicochemical properties of lanthanoid compounds have been found to be closely related to the regular f-configuration of the elements, it is essential to study the interaction between the f-electrons and the circumstances for developing new applications. Two-dimensional transition metal dichalcogenides (2D-TMDs) manifest as excellent matrices for tunable electronic structures owing to their chemical accessibility and physical sensitivity. Herein, a novel method is proposed for the fabrication of Ln3+ substitutional doped MoS2 using a Na2MoS4 solution precursor. Monolayers doped with all Ln3+ ions (except Pm3+) are synthesized, which is confirmed by structural characterization. Their shrunk Raman frequency differences and the blue-shifting and intensity boosting of their photoluminescence (PL) peaks are observed. Periodic trends are discovered in the PL spectra, which are sensitive to specific elements. The results reveal the ordered interaction between f-orbitals and the host possessing an appreciable coulombic field, spin–orbital coupling, and a crystal field. This work offers a crucial extension of lanthanoid laws and a new approach to the modulation of the properties of 2D crystals.
研究领域:
材料科学
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纳米技术
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光电子学
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物理化学
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DOI
高影响因子
INORGANICA CHIMICA ACTA
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2023
·
IF 2.8
Shun-Ping Zhao,Xu-lin Cui,Qiang-hong Yu,Yu Guo,Jie Wang,Heng Xu
Hybrid materials of lead halide have numerous structural variations and superior optoelectronic capabilities. The hybrid crystal 1 prepared by the hybrid halogen method has the chemical formula [ p -F-Bz-1-APy][Pb 2 Br 3.2 I 2.8 ] (C 24 H 20 F 2 N 4 Br 3.2 I 2.8 Pb 2 ) ( p -F-Bz-1-APy = p -fluoro-phenyl-1-aminopyridinium) with a space group of P 2 1 / c , two unequal [F1/F2-Bz-1-APy] + cations, and a heterogeneous double-chain inorganic layer made of edge-sharing Pb 2 Br 3.2 I 2.8 octahedron. The two cations adopt a lower-energy and more stable structural configuration, according to potential energy scans of the dihedral angles of the benzene and pyridine rings. The stacked structures are held together by a variety of intermolecular interactions, including hydrogen bonds (anion-cation, cation-cation), stacking (cation-cation), and the rare C-F2…π halo-bond. Hirshfeld surface analysis quantifies intermolecular interactions, revealing that interactions involving Br atoms and [F2-Bz-1-APy] + cations contribute more to the formation of stacking structures than interactions involving I atoms and [F1-Bz-1-APy] + cations. The logarithmic derivative method clearly reveals two dielectric relaxation processes, one in the low frequency region (<10 2 Hz) masked by the DC conductance and one in the high frequency region (10 2 -10 7 Hz), which were then fitted by the Arrhenius formula to obtain their corresponding activation energies of 77.75 KJ/mol and 144.14 KJ/mol, respectively. Our research offers inspiration and a framework for the development of novel lead halide-based optoelectronic materials and dielectric analyses.
研究领域:
材料科学
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物理化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Mingquan Liu,Yingying Jiao,Junchao Qin,Zhongjun Li,Jianshe Wang
Nonmetals doping are effective for adjusting the electronic and molecular structures of C 3 N 4 nanosheets (CN), which could broaden the range of visible light response and improve the photo-induced electron-hole separation. Here a series of nonmetals (S, P, F and Br) doped C 3 N 4 nanosheets (x-CN) decorated with boron doped C 3 N 4 nanodots (BCNDs) was prepared for the first time. Compared with the pristine nonmetals doped CN, the integrating of BCNDs with x-CN can effectively facilitates the charge separation and transfer in the photocatalytic process, and endows enhanced photocatalytic activity for hydrogen production. The maximum photocatalytic hydrogen production rate of the BCNDs/S-CN, BCNDs/P-CN, BCNDs/F-CN and BCNDs/Br-CN composite can reach 3924.81 μmol·g −1 ·h −1 , 2387.62 μmol·g −1 ·h −1 , 2374.06 μmol·g −1 ·h −1 and 3471.56 μmol·g −1 ·h −1 respectively, which is about 3.3, 4.3, 4.0 and 3.1 times that of their counterparts, respectively. This work demonstrates that BCNDs plays an important role to improve the photocatalytic properties by forming 0D/2D isotype heterojunction with nonmetals doped C 3 N 4 nanosheets and provides new members for heterojunction photocatalysts, which is conductive to further fundamental and applied research.
研究领域:
材料科学
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化学
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纳米技术
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能源科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 30
·期 1
·647-657
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IF 2.324
Xiao Tai,Huang Zu-Sheng,Wang Lingyun,Cao Derong
Three novel dithieno[3,2- f :2′,3′- h ]quinoxaline-based organic dyes ( IQ-C, IQ-D and IQ-F ) with three π-spacers were synthesized and developed for dye sensitized solar cells, where dithieno[3,2- f :2′,3′- h ]quinoxaline was used as electron-withdrawing π-spacers, and 2,3-diphenylquinoxaline or dibenzo[ a,c ]phenazine as auxiliary electron-withdrawing π-spacers. The dye IQ-D with 2,3-diphenylquinoxaline as auxiliary electron-withdrawing π-spacer exhibited higher photocurrent ( J sc ) and photovoltage ( V oc ) than that of the dye IQ-C with 2,3-bis(4-(octyloxy)phenyl)quinoxaline as the additional electron-withdrawing π-spacer, due to the larger adsorption amount of IQ-D . The dye IQ-F with a rigid conjugated dibenzo[ a,c ]phenazine as additional electron-withdrawing π-spacer showed the highest efficiency of 6.54% under AM 1.5 G irradiation. It was demonstrated that the π-spacers influence the photovoltaic performance of the dithieno[3,2- f :2′,3′- h ]quinoxaline-based organic dyes significantly. The results indicated that the dyes with three π-spacers are promising candidates for efficient dye-sensitized solar cells.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Wei Zhang,Rui Tong,Xiangmin Zhao,Wei Gao,Xue Wang,Xinhui Yang
Ga and F co-doped ZnO (GFZO) thin films were prepared on quartz substrates via the sol-gel spin-coating method, followed by annealing in O 2 , Ar, N 2 , and H 2 atmosphere. The effects of annealing atmosphere on the structure, optical transmission, electrical properties, and thermal stability of GFZO films were systematically investigated. All GFZO films exhibited a typical wurtzite structure with a c-axis preferential orientation. The average optical transmittance of GFZO films annealed in Ar, N 2 , and O 2 atmospheres exceeded 90% in the visible region, while that of the H 2 -annealed sample was about 60%. The resistivity values of GFZO films annealed in Ar, N 2 , and H 2 atmospheres ranged from 1×10 -3 to 3×10 -3 Ω·cm at room temperature, whereas the film annealed in O 2 showed a much higher resistivity of 7.887×10 5 Ω·cm. Notably, the GFZO thin films annealed in Ar or N 2 atmosphere can maintain a low resistivity of 8×10 -3 Ω·cm even at 500 °C while retaining excellent thermal stability. With high optical transmittance, low electrical resistivity, and outstanding thermal stability, the Ar and N 2 annealed GFZO thin films are highly suitable for transparent conductive thin film applications.
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Pengfei Zhou,Jing Zhang,Zhennan Che,Zuhao Quan,Ju Duan,Xiaozhong Wu,Junying Weng,Jinping Zhao,Jin Zhou
P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 is considered as a promising cathode material for sodium-ion battery (SIBs) because of its high capacity and discharge potential. However, its practical use is limited by Na + /vacancy ordering and P2-O2 phase transition. Herein, a Ti 4+ /F − co-doping strategy is developed to address these issues. The optimal P2-Na 0.67 Ni 0.33 Mn 0.37 Ti 0.3 O 1.9 F 0.1 exhibits much enhanced sodium storage performance in the high voltage range of 2.0–4.4 V, including a cycling stability of 77.2% over 300 cycles at a rate of 2 C and a high-rate capability of 87.7 mAh g −1 at 6 C. Moreover, the P2-Na 0.67 Ni 0.33 Mn 0.37 Ti 0.3 O 1.9 F 0.1 delivers reversible capacities of 82.7 and 128.1 mAh g −1 at −10 and 50 °C at a rate of 2 C, respectively. The capacity retentions over 200 cycles at −10 °C is 94.2%, implying more opportunity for practical application. In-situ X-ray diffraction analysis reveals that both P2-O2 phase transitions and Na + /vacancy ordering is suppressed by Ti 4+ /F − co-doping, which resulting in fast Na + diffusion and stable phase structure. The hard carbon//P2-Na 0.67 Ni 0.33 Mn 0.37 Ti 0.3 O 1.9 F 0.1 full cell exhibits a high energy density of 310.2 Wh kg −1 and remarkable cyclability with 82.1% retention after 300 cycles at 1 C in the voltage range of 1.5–4.2 V. These results demonstrate that the co-doping Ti 4+ /F − is a promising strategy to improve the electrochemical properties of P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 , providing a facile tactic to develop high performance cathode materials for SIBs.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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固态化学
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电池技术
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Wenhao Yu,Wenruo Li,Luzheng Zhao,Weiqiang Kong,Shaofeng Xu,Xu Han,Haoyuan Zhu,Shun Liu,Jiancong Guo,Zhongsheng Wen
CuF 2 is a promising candidate of electrode materials for lithium-ion batteries due to its high specific capacity, high power density and environmental friendliness. However, the irreversible phase conversion and sluggish kinetics caused by serious copper dissolution and low conductivity make CuF 2 difficult to achieve long cycling life. A facile strategy to incorporate CoPPc into CuF 2 was proposed firstly to regulate the Cu-F bonding force to realize the high reversibility of CuF 2 for lithium-ion storage. The results of DFT calculation, differential charge density simulation, work function calculation and COHP bond level calculation show that the existence of CoPPc can improve the surface charge distribution of CuF 2 and thus improve the reversibility for durable lithium-ion storage. The cycle life performance of the CuF 2 @CoPPc composite electrode obtained by this method reached staggering 500 cycles and the capacity remained at 594.8 mAh/g.
研究领域:
材料科学
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电化学
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能量存储
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电池技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zheng Kong,Lun Lu,Chao Zhu,Junjie Xu,Qile Fang,Renlan Liu,Yi Shen
PFOA has caused enormous environmental risks with recalcitrance, toxicity, and bioaccumulation, while the degradation of PFOA is still a challenging topic related to the high energy of C F bonds. However, the conventional methods such as biological oxidation, electrochemical oxidation and membrane separation have their own drawbacks. Actually, adsorption-photocatalysis is considered a potential treatment due to effectiveness and thoroughness. Instead of preparing the composite material by adding TiO 2 , the method to in-situ grow TiO 2 in the MOF (MIL-125(Ti)) was carried out, which achieved narrowed band gap and improved the photoresponse ability, simultaneously. Furthermore, the surface F-functionalized MOF provided more available special adsorption sites for PFOA enrichment. Linked fluorine groups not only improved the adsorption capacity (185.151 μmol/g) but also enhanced the photocatalytic rate (1.221 E −4 /s) by altering the electronic density of VB and CB. The constructed F-TiO 2 @MIL-125 stepwise degraded PFOA through a dominant ·OH attack pathway and maintained the oxidize ability of h + to PFOA. As a bifunctional material for adsorption and photocatalysis , F-TiO 2 @MIL-125 was able to be applied in various water environments repeatedly, which has unlimited environmental application potential.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kai Ma,Yao Luo,Jietao Wang,Xu Chang,Tong Liu,Yao Wang,Mingyue Ding
Developing robust fuel electrodes with high catalytic activity and stability under CO/CO 2 atmospheres is critical for reversible solid oxide fuel cells (RSOFCs). Here, we report a novel A-site-deficient perovskite Sr 1.95 Fe 1.5 Mo 0.3 Ni 0.2 F 0.1 O 6-δ (SFMNF) synthesized via electrospinning, combining Ni 2+ (B-site cation) and F - (anion) co-doping to enhance CO 2 electrolysis and syngas oxidation performance. Physicochemical characterization reveals that F-doping lowers the crystallization temperature, increases oxygen vacancy concentration, and strengthens CO 2 chemisorption. Reduction under H 2 induces exsolution of Ni 3 Fe alloy nanoparticles. The SFMNF electrode achieves a current density of 233 mA cm -2 at 1.3 V and 750°C in CO:CO 2 =2:1 atmosphere, with 36.2% higher activity than the pre-reduced state. Electrochemical impedance and distribution of relaxation time analyses identify CO 2 adsorption/dissociation as the rate-limiting step. The cell demonstrates exceptional durability over 50 redox cycles and 85-hour of operation without carbon deposition. This work highlights dual doping as an effective strategy to tailor perovskite properties for efficient CO 2 utilization in RSOFCs.
研究领域:
能源材料
·
电化学
·
催化
·
纳米技术
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固体氧化物燃料电池
·
CO2利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）