RSC Advances
·
2016
·Vol. 6
·期 53
·48043-48048
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IF 3.289
Ying Duan,Ye Chen,Qing Wen,Tigang Duan
We have developed a simple and effective way to fabricate Ti/Sb–SnO2 electrodes by electrodeposition from a dimethyl sulfoxide solution. The electrode surface exhibits a distinct cauliflower-like structure with a small grain size. Its electrochemical properties have been evaluated by electrochemical impedance spectroscopy and accelerated service life tests; furthermore, the results were compared with those obtained for an electrode prepared from aqueous solution. The DMSO-prepared electrode has low charge transfer resistance (22.71 vs. 107.60 Ω) and high stability (59.3 vs. 2.8 h). Moreover, its ability to electrochemically decolorize methyl orange and rhodamine B is greatly improved.
研究领域:
材料科学
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环境科学
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ning Zhang,Ying Tang,Huaicheng Xiang,Liang Fang
Two cubic garnet ceramics, Ca 3 B 2 ZnGa 2 O 12 ( B = Nb, Sb), were synthesized via the solid-state approach, where Zn 2+ and Ga 3+ jointly occupied the tetrahedra ( C -site), and Nb 5+ (or Sb 5+ ) fully occupied the octahedra ( B -site). Ca 3 Nb 2 ZnGa 2 O 12 ceramic sintered at 1390 °C possessed a relatively larger ε r , τ f , and Q × f value of 16.57, −44.0 ppm/°C, and 39,200 GHz compared to ε r = 9.04, Q × f = 25,300 GHz, and τ f = −61.2 ppm/°C for Ca 3 Sb 2 ZnGa 2 O 12 fired at 1270 °C. Bond valence, ionic polarizability, packing fraction, Raman spectroscopy , and the P–V-L chemical bond theory were used to investigate the intrinsic factors affecting microwave dielectric properties . Compared with the measured permittivity ε r , the theoretical permittivity ε r (C-M) of Ca 3 Nb 2 ZnGa 2 O 12 is underestimated, and Ca 3 Sb 2 ZnGa 2 O 12 shows the opposite trend, which is mainly related to the under- and over-bonding in the structure. The packing fraction of Ca 3 Nb 2 ZnGa 2 O 12 is slightly lower than that of Ca 3 Sb 2 ZnGa 2 O 12 , but it does not lead to the low Q × f value of Ca 3 Nb 2 ZnGa 2 O 12 . The variation in Q × f was related to relative density, weak short-range order (SRO), and lattice energy. The minus sign and magnitude of τ f for both ceramics were determined by their large positive τ αm values.
研究领域:
材料科学
·
化学
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Peng Chen,Keke Hu,Xinyu Lin,Zhongliao Wang,Yumeng Zhang,Qinzhuang Liu,Zhongliang Liu
Zero-dimensional metal halide perovskites with strong self-trapped exciton (STE) emission are promising for efficient lighting and sensing, but STE → dopant energy transfer is not well quantified. Here we use Sb 3+ -doped Cs 4 PbCl 6 nanocrystals as a model and combine temperature-dependent steady-state and time-resolved photoluminescence, rate-equation analysis and first-principles calculations to clarify the STE → Sb 3+ cascade sensitization. Emission and excitation spectra confirm successful Sb incorporation. The 360 nm ultraviolet band is assigned to STE recombination, whereas the green band originates from STE → Sb 3+ transfer and the Sb 3+ 3 P 1 → 1 S 0 transition. The transfer efficiency (∼64 %) shows that STE feeding dominates the excitation of Sb centers. Low-temperature PL analysis reveals distinct electron–phonon coupling: STE emission couples mainly to low-frequency phonons, while Sb 3+ emission couples more strongly to high-frequency modes. The extracted activation energies and the cooperative increase of τ STE and τ Sb with decreasing temperature support a thermodynamically downhill STE → Sb 3+ migration. Within a rate-equation framework, the rise time of Sb 3+ emission satisfies t rise ≈ τ STE and yields a characteristic cascade-like transient profile. Density-functional calculations indicate Sb-5p acceptor levels inside the bandgap, providing an energetic basis for localized STE → Sb 3+ coupling and design guidelines for efficient 0D perovskite emitters.
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SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
·
2016
·
IF 3.433
Dong Wang,Kaiwen Guan,Zhiping Bai,Fuqiang Liu
A new facile coating strategy based on the hydrophobicity of methyl groups was developed to prevent nano-sized magnetite particles from strong acid corrosion. In this method, three steps of hydrolysis led to three layers of protection shell coating Fe3O4 nanoparticles. Filled with hydrophobic methyl groups, the middle layer mainly prevented the magnetic core from strong acid corrosion. These magnetite particles managed to resist 1 M HCl solution and 2.5 M H2SO4 solution. The acid resistant ability was higher than those reported previously. After further modification with amino-methylene-phosphonic groups, these magnetite particles successfully adsorbed Sb(III) in strong acid solution. This new strategy can also be applied to protect other materials from strong acid corrosion.
研究领域:
环境化学
·
材料科学
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纳米技术
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污染控制
·
吸附材料
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 10
·4122-4128
·
IF 3.288
Feiyuan Sun,Hao Feng,Shilun Gao,Dandan Yang,Huabin Yang
A silicon/antimony/antimony oxide/graphite@amouphous carbon (Si/Sb/Sb2O3/G@C) composite material was prepared successfully via a simple ball milling and high temperature calcination process. Its structural characterization showed that Si and Sb/Sb2O3 were dispersed into the graphite layer and coated with amorphous carbon. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results revealed that Sb2O3 was partly reduced to Sb by carbon, which could improve its electronic conductivity. Besides, Si, Sb, Sb2O3 and carbon have different lithiation/delithiation voltage plateaus, which can act as a mutually buffering matrix, thus improving its electrochemical performance. Due to the high specific capacity, good electronic conductivity and stable cycling performance benefited from the Si/Sb/Sb2O3, Sb/G and G/C, respectively, as well as the mutually buffering matrix of all the active materials, the resulting composite electrode materials exhibit excellent electrochemical performance. The composite material exhibited good cycling performance (a stable reversible delithiation capacity of 567.8 mA h g−1 after 180 cycles), excellent rate capability (∼360 mA h g−1 and 280 mA h g−1 at current densities of 1000 mA g−1 and 2000 mA g−1, respectively) and decreased polarization resistance. This work demonstrates a facile and cost-effective approach to preparing composite materials with complementary advantages for use in high-performance Li-ion batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiashuai Han,Dongming Liu,Siyang Liu,Wenlong Shao,Enen Yang,Tianpeng Zhang,Xin Jin,Xigao Jian,Fangyuan Hu
Antimony (Sb) based materials are considered to be promising materials for sodium (Na) storage due to their high theoretical capacity and appropriate operating voltage. However, the huge volume change during sodiation/desodiation leads to capacity decay rapidly and impedes the practical application. Herein, we embed Sb into the pores of biomass-derived porous carbon to prepare the novel hybrids (Sb@BDPC) through a simple liquid-phase reduction method to improve the cycle stability and specific capacity. The Sb@BDPC hybrids are prepared by Qamgur precursor, exhibiting abundant pore structures and three-dimensional interconnection networks. As anode for sodium-ion batteries (SIBs), the Sb@BDPC hybrids maintain a reversible capacity of 302.7 mAh g −1 at 0.1 A g −1 after 100 cycles, while 168.3 mAh g −1 of capacity remained after 500 cycles at 1 A g −1 . Such excellent sodium storage performance is primarily attributed to the synergistic effect of porous carbon and Sb nanoparticles . Specifically, the stable structure with abundant pores of carbon not only provides a channel for fast transfer of charge carriers, but alleviates the volumetric expansion and aggregation of Sb during cycling. These results prove the performance advantages of the composites and provide a simple approach for making full use of disordered porous carbon and constructing Sb-based anode materials toward high and stable energy storage.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jingyu Guo,Xiangtong Zhan,Jiating Lan,Xin Liu,Shuang Zhao,Xi Xu,Li-Ming Wu,Ling Chen
Birefringent crystals are the key components of functional optics, contributing significantly to scientific and technological advancements. To enhance birefringence, the presence of stereochemically active lone pairs offers a unique opportunity. In fact, strengthening the stereochemical activity and aligning uniformly lone pairs face tough challenges. Herein, an anisotropic layered crystal, Sb4O5I2, is discovered to exhibit enhanced birefringence. The influence of crystal symmetry on the birefringence of Sb4O5X2 (X = Cl, Br, or I) is found to be minor. Instead, the asymmetric nature of ABUCBs (i.e., cis-X3[SbO3]6– and cis-X3[SbO4]8–) plays a crucial role in enhancing the optical anisotropy. And the orientation of these ABUCBs is equally important. We demonstrate that by adjusting the Sb/I ratio from 5:1 to 2:1, all of the intralayer Sb atoms in Sb5O7I-P63 are forced onto the surface position. This structural adjustment leads to strengthened ionic bonding interactions, enhanced activity of the lone pairs, and uniform alignments of the ABUCBs in Sb4O5I2. Consequently, this results in a 6-fold increase in birefringence.
研究领域:
材料科学
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光学
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无机化学
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晶体工程
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高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Qian Luo,Runyu Wang,Kai Lu,Hang Liu,Guocai Yuan,Juncheng Ding,Xiaobo Lei,Ruonan Min,Qinyong Zhang,Lihong Huang
PbSe has attracted significant attention as a medium-temperature thermoelectric (TE) material due to its abundance and low cost. This study demonstrate that in the novel thermoelectric system of Al x Pb 0.9975 Sb 0.0025 Se samples ( x = 0, 0.005, 0.01, 0.02, and 0.03), the electronic conductivity of pure PbSe was enhanced by Sb doping. Introducing a small amount of Al to occupy the Pb vacancies not only increases the Hall carrier concentration in PbSe, but also resulting in an increase in Seebeck coefficient ( S ). At 873 K, the power factor ( PF ) of the sample with x = 0.02 increases to 16 μW cm −1 K −2 . In addition, the total thermal conductivity did not increase significantly, so the thermoelectric performance was effectively improved, a maximum figure of merit ( ZT ) of 1.8 is achieved at 873 K, along with a high average ZT ( ZT avg ) of approximately 1 over the temperature range of 300–873 K.
研究领域:
材料科学
·
热电学
·
能量转换
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yu Tian,Yifei Guan,Fang Yu,Jichao Li,Jian Liu,Shengqing Xia
While transition metal doping is widely adopted to optimize Mg3(Bi, Sb)2-based thermoelectrics, conventional high-concentration doping inevitably induces detrimental grain boundary segregation, creating a convoluted mixed effect that obscures the intrinsic regulatory roles of the dopants. To systematically unveil these fundamental impacts, we establish a low-concentration doping paradigm. By synergizing a precisely controlled low-concentration strategy with an optimized synthesis process, 3d transition metals (Mn, Fe, Co, Cu) are homogeneously incorporated into the bulk lattice without boundary enrichment. Based on this homogeneous microstructural framework, distinct doping effects are systematically revealed. Fe and Co act as highly efficient electron donors, elevating the carrier concentration to >1.5 × 1020 cm–3. In contrast, Mn fundamentally optimizes the carrier scattering mechanism via effective mass reduction, leading to a remarkable 2.6-fold enhancement in carrier mobility. Consequently, the lightly Mn-doped sample achieves an optimal balance, yielding a peak power factor of ∼30.7 μW/(K2cm) and a maximum zT of 1.03. Furthermore, this homogeneously doped sample demonstrates optimized macroscopic durability, retaining consistent electrical properties after 3-month ambient air exposure and withstanding 50 rigorous thermal shock cycles. Ultimately, this work clarifies how homogeneously incorporated dopants regulate transport properties and stabilize the crystal matrix, establishing precise low-concentration as a robust framework for high-performance and durable thermoelectrics.
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PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Yahui Shi,Zhixiang Zhang,Heyu Wan,Lin Ma,Heng Chen,Ying Li,Jiahui Dai,Dongjin Wan
This study developed a sulfur autotrophic bioreactor that could effectively remove Sb(V) of ppm (10 mg/L) and ppb (500 μg/L) levels in water through sulfur autotrophic reduction, sulfur disproportionation and in-situ precipitation. At the longest hydraulic retention time (i.e., HRT = 5.42 h for ppm Sb(V) level and HRT = 12.0 h for ppb Sb(V) level), the bioreactors performed well, with removal efficiencies of 97.1%, 96.2% for Sb(V), and 96.3%, 47.0% for the total Sb (TSb), respectively. Sb(V) removal by sulfur autotrophic reduction matched well with First-order kinetic model, implying that Sb(V) concentration was the main controlling factor limiting its removal. The measured SO 4 2- increment and alkalinity consumption in effluent were higher than the theoretical values owing to the occurrence of sulfur disproportionation. At the end of bioreactor operation, the in-situ precipitates were characterized and confirmed to be Sb 2 S 3 . Given arsenic (As) toxicity mechanism in KEGG database, the mechanistic response of organisms to Sb(V) was attributed to the reactive oxygen species (ROS) from the highly toxic methyl compounds of Sb(III). Proteobacteria was the dominant phylum for Sb(V) removal, and Sulfuricurvum and Microbacter (at genus level) played key roles for Sb(V) reduction and sulfur disproportionation, respectively. Download: Download high-res image (291KB) Download: Download full-size image
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ACS Applied Electronic Materials
·
2026
·
IF 4.7
Soumya Shukla,Rajnish Kurchania,Ramarajan Ramanathan
A highly conductive, transparent conducting electrode (TCE) based on Ba and Sb codoped tin oxide (BATO) has been successfully spray-deposited for dye-sensitized solar cell (DSSC) applications, offering a promising alternative to conventional fluorine-doped tin oxide/indium tin oxide (FTO/ITO) electrodes. ATO is one of the most extensively studied TCE materials. However, its commercialization remains limited due to suboptimal electrical conductivity and optical transparency. The present research focuses on enhancing these properties by introducing Ba as a codopant in ATO thin films. Barium codopant effectively decreases the grayish color and helps optimize oxygen-vacancy density, which enhances electrical conductivity in ATO thin film. The spray-deposited large-area (10 × 10 cm2) BATO thin film exhibits an enhanced optical transmittance of 86%, a low resistivity of 4.605 × 10–4 Ω·cm, and a minimum sheet resistance of 13.7 Ω/□ significantly outperforming the corresponding ATO film. Importantly, the suitability of BATO and ATO electrodes was evaluated in DSSC devices, and the obtained results were compared to those of DSSCs employing commercial FTO electrodes. A power conversion efficiency (η) of 3.27% was recorded for the DSSC employing the BATO electrode, outperforming the ATO-based counterpart, which exhibited an efficiency of 2.39%. Interestingly, the alternative BATO electrode significantly reduces the reliance on indium-based TCOs and mitigates the optimization challenges associated with FTO electrodes, thereby contributing to a more cost-effective fabrication of DSSC solar cell devices.
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Materials Today Chemistry
·
2025
·
IF 6.7
Ying Wang,Zeyu Lyu,Pengcheng Luo,Zheng Lu,Dashuai Sun,Taixing Tan,Shuai Wei,Hongyang Zhang,Hanyu Hu,Hongpeng You
A series of solid-solution phosphors Ba 3 Sb 1- y Ta y Ga 3 Si 2 O 14 :Bi 3+ (0.0 ≤ y ≤ 1.0) were created using the high-temperature solid-state reaction. The crystal structure of Ba 3 Sb 1- y Ta y Ga 3 Si 2 O 14 belongs to trigonal crystal system with space group P321 (150) . The Rietveld refinements indicate that the Bi 3+ ions occupy the Ba 2+ sites. Ba 3 Sb 1- y Ta y Ga 3 Si 2 O 14 :0.03Bi 3+ has tunable luminescence property peaking from 531 to 492 nm as the Sb 5+ ions are gradually replaced by Ta 5+ ions, which are correlated with the crystal field strength variation causing by the substitution of Sb 5+ by Ta 5+ . The thermal stability of the emission at 423 K was improved from 5.4 to 49.9 %. When the obtained Ba 3 SbGa 3 Si 2 O 14 :0.03Bi 3+ /Ba 3 SbGa 3 Si 2 O 14 :0.03Bi 3+ ,0.015Eu 3+ was used as green light component, white LED devices were achieved with low CCT of 4613/4748 K and high Ra of 90.9/95.5. Moreover, multicolor luminescence was constructed by introducing red-emitting Eu³⁺ ions to create Ba 3 SbGa 3 Si 2 O 14 :0.03Bi 3+ ,0.015Eu 3+ and Ba 3 TaGa 3 Si 2 O 14 :0.03Bi 3+ ,0.015Eu 3+ phosphors. Under different excitation conditions, the multicolor emissions provide multi-modal and easily distinguishable anti-counterfeiting patterns. Our work demonstrates the feasible construct of tunable emission from Bi 3+ -doped solid-solution phosphors, providing a valuable candidate for diverse optical applications.
研究领域:
材料科学
·
光学工程
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