APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Wen Cui,Lvcun Chen,Jieyuan Li,Ying Zhou,Yanjuan Sun,Guangming Jiang,S.C. Lee,Fan Dong
Semiconductor-based photocatalysis has attracted considerable interdisciplinary attention for its diverse applications in environmental remediation and solar energy conversion. However, pure earth-abundant insulators have been seldom considered as photocatalysts because of the unfeasible electronic excitation. In this work, we make the earth-abundant insulator BaSO 4 as conceptually new photocatalyst via Ba-vacancy engineering for the first time. The BaSO 4 with Ba-vacancy is synthesized by a facile precipitation method and applied for photocatalytic NO removal in air. XAFS spectroscopy and DFT calculations demonstrate the formation of Ba-vacancy. Also, defect level induced by Ba-vacancy between the wide band gap is demonstrated, which endows insulator BaSO 4 with semiconductor-like photocatalytic performance. Besides, according to the TPD analysis and theoretical simulation, Ba species is functioned as the NOx storage center for the primary accumulation of NO molecule on substrate, and simultaneously Ba-vacancy is equipped with the capability to redistribute charge carriers and thus accelerate the activation of NO molecule by the donation of electrons to electron-deficient areas, facilitating the conversion of NO into a higher valance state for further favorable photocatalytic oxidation. In situ DRIFTS spectra are applied to dynamically monitor intermediates and products on photocatalyst surface, revealing the reaction process and the enhancement role of Ba-vacancy. This work opens a new research doorway on earth-abundant insulators for the development of a new family of photocatalyst.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 61
·e202201990
·
IF 5.02
Jiaqi Guo,Anrui Feng,Yu-e Shi,Zhenguang Wang
Graphical Highly luminescent and thermally stable hybrid phosphors of sulfur nanodots@BaSO 4 were fabricated through an in situ precipitation method. Sulfur nanodots are incorporated in the matrix of BaSO 4 , and BaSO 4 provides passivation effect for surface ligands or traps, resulting in the promotion of photoluminescence quantum yield from 23 % to 58 %, and the BaSO 4 matrix also leads to promotion of thermal stability. Producing high performance phosphors using abundant and non-toxic precursors yet straightforward methods are promising but still a challenging task. Herein, highly luminescent and thermally stable phosphors were fabricated through an in situ precipitation synthesis strategy. Sulfur nanodots (S-dots) act as the precursors for precipitation reactions and also provide the luminescent centers. Structural and optical characterization investigations suggest that S-dots are incorporated in the matrix of BaSO 4 , and BaSO 4 provides passivation effect for the surface ligands or traps of S-dots. This results in the promotion of photoluminescence quantum yield from 23 % to 58 %, and the BaSO 4 matrix also leads to the obvious promotion of thermal stability. These merits endow the construction of phosphor-based light-emitting diodes by utilizing the S-dots@BaSO 4 hybrid phosphors as a color conversion layer. These research results are significant for developing sulfur-based luminescent materials, and also provide a solid and universal theory to produce high quality phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 2
·340-350
·
IF 3.552
Zhang Wei,Xu Boren,Gong Caihong,Yi Chunwang,Zhang Shen
In this study, a facile and environmentally friendly method with low energy consumption for preparing nanoscale AgCl and BaSO 4 co-precipitates (AgCl@BaSO 4 co-precipitates) was developed based on the metathetical reaction. Then, the dried co-precipitates were melt-compounded with polyamide 6 (PA6) resins at a specified mass ratio in a twin-screw extruder. The results demonstrated that in the absence of any coating agent or carrier, the nanoparticles of AgCl@BaSO 4 co-precipitates were homogeneously dispersed in the PA6 matrix. Further analysis showed that after the addition of AgCl@BaSO 4 co-precipitates, the antibacterial performance, along with the flame-retardance and anti-dripping characteristics of PA6, was enhanced significantly. In addition, the PA6 composites possessed high spinnability in producing preoriented yarn.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
·
2024
·
IF 2.3
Boren Xu,Chunwang Yi
In this work, by simply using barium hydroxide (Ba(OH)2·8H2O) to react with cupric(II) sulfate pentahydrate (CuSO4.5H2O) in methanol under room temperatures, cupric oxide and barium sulfate co-precipitates (CuO@BaSO4) were one-step prepared, and the methanol can be recycled after separating the co-precipitates. The CuO@BaSO4 co-precipitates were then blended with polyamide 6 (PA6) to prepare PA6-CuO@BaSO4 composites and composites fiber via melt extrusion and melt spinning methods to improve the mechanic and antibacterial properties synchronously. The as-prepared CuO@BaSO4 co-precipitates have a regular size of 30–50 nm and are highly compatible with the PA6 matrix. Further investigations disclosed that the CuO@BaSO4 co-precipitates had a good dispersion in the PA6 matrix and synchronously improved the mechanical properties and thermal stability. What’s more, the PA6-CuO@BaSO4 composites showed excellent antibacterial performance and high spinnability. The bactericidal rate reached 100% when adding tiny content (0.24 wt%) of Cu2+ into PA6 fibers.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
npj Clean Water
·
2025
·Vol. 8
·期 1
·1-14
·
IF 11.4
Chen Yi,Jin Yue,Zhu Honglin,Zhang Haolan,Wei Luyu,Tang Yan,Wang Rui,Zhou Dayu,Gu Jinchuan
Molybdenum disulfide (MoS 2 ) can be used as a potential photocatalyst for the removal of emerging contaminants (ECs) under visible light (Vis). However, the high carrier recombination rate and aggregation restrict pure MoS 2 application. The hydrothermal method was used to prepare a novel MoS 2 /BaSO 4 /zeolite (Z) composite (MBZ), which was used to activate peroxymonosulfate (PMS) under visible light for sulfadiazine (SDZ) degradation. The MBZ showed a moderate E g value (2.59 eV), indicating good visible-light absorption. The physicochemical and photoelectrochemical properties were analyzed, revealing that the hybrid MBZ significantly enhanced photoinduced carrier generation, separation, and transfer. The MBZ exhibited 2.38-, 3.24-, and 1.36-fold higher SDZ removal reaction rates than Z, BaSO 4 , and MoS 2 in the PMS/Vis system. The addition of EDTA-2Na notably decreased the degradation rate (79.58–89.88%), indicating the significant role of h + . This work provides a new approach to the design of semiconductor/insulator photocatalysts and constructs a promising catalytic oxidation system for the green remediation of EC wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liuxu Wei,Yupeng Wang,Ruihan Gao,Jiapei Liu,Qi Zhang,Jun Xing,Xiaodan Xia,Zhenyu Xiao,Lei Wang
Although layered double hydroxides (LDHs) provide structural advantages for alkaline zinc-ion battery (AZIB) cathodes via their inherent layered architecture, their intrinsic low electrical conductivity and anisotropic ion transport limits charge transfer kinetics. A Ksp -regulated electrochemical etching strategy is first proposed to solve this challenge by exploiting the dramatic solubility difference between BaSO 4 and Co/NiSO 4 . The thermodynamic selectivity enables the precise construction of BaSO 4 nanodot-anchored NiCo-LDH heterostructures (BS@CN-LDH) within a rapid minute-scale process, achieving atomic-level control over heterointerface architecture. Density functional theory (DFT) calculations coupled with UPS analysis reveal a strong built-in electric field (BEF) at the heterointerface (ΔΦ = 0.70 eV), driving interfacial charge redistribution of 0.013 e from NiCo-LDH to BaSO 4 . The optimized BS@CN-LDH electrode material exhibits a high specific capacity of 450.5 mAh g −1 at a current density of 2 mA cm −2 , maintaining 83.3% excellent cycling stability after 10 000 cycles. Moreover, the as-fabricated BS@CN-LDH//rGO-Zn AAZB cell achieves a record energy density of 747.9 Wh kg −1 at a power density of 0.27 kW kg −1 , surpassing most reported zinc-based energy storage devices. This Ksp -regulated etching strategy provides critical insights into electric field engineering of heterostructured materials to resolve the persistent electron/ions transfer kinetics for dramatically increased energy storage performance.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
OPTIK
·
2015
·
IF 0.677
Renping Cao,Zhengdong Qin,Xiaoguang Yu,Donglan Wu,Guotai Zheng,Wensheng Li
BaSO 4 phosphor activated with Sm are prepared by the high temperature solid state reaction method in air, and its crystal structure, morphology, and luminescence properties are investigated. Broadband PLE spectrum are observed within the range 250–580 nm owing to mainly the 4f–5d transitions of Sm 2+ ions, and PL spectrum consists seven emission bands in the range of 550–780 nm owing to mainly 5 D 0 → 7 F J ( J = 0, 1, 2, and 3) transitions of Sm 2+ ion and 4 G 5/2 → 6 H J ( J = 5/2, 7/2, and 9/2) transitions of Sm 3+ ions. Sm 2+ ions can exist steadily in BaSO 4 :Sm phosphor sintered at different temperature and time in air. The optimum Sm 2+/3+ doping concentration, sintering temperature and time are about 2 mol%, 800 °C and 30 min, respectively. The luminous mechanisms are discussed by the schematic energy level diagrams of Sm 3+ and Sm 2+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 15
·24238-24247
·
IF 3.83
Hao Liu,Chuang Jie,Zhoufu Wang,Zhongzhuang Zhang,Xitang Wang,Yan Ma
The present study aims to clarify the influence of BaSO 4 on composition, microstructural evolution and properties of magnesia refractory castables. Castables with different BaSO 4 contents were prepared using calcined magnesia, microsilica , and BaSO 4 as raw materials. The results show that introducing BaSO 4 can significantly enhance slag resistance of magnesia refractory castables. Castables presented high compactness and mechanical properties with 0–3 wt% BaSO 4 for the liquid sintering process and formation of BaMgSiO 4 at high temperature. Then compactness of castables decreased when BaSO 4 content increased from 5 wt% to 10 wt% for its decomposition and a subsequent increase in the pore content. BaSO 4 presented minor effects on the low temperature (1100 °C) structure of castables and played an important role in enhancing high temperature slag resistance, owing to its high structural stability till 1550 °C. The slag resistance mechanism of castables with BaSO 4 is that Al 3+ in slag was incorporated into periclase intergranular to form BaAl 2 O 4 phases during corrosion process, resulting in the increased slag viscosity and suppressed continuing penetration. The research of this work provides a new insight into microstructure and properties enhancement of magnesia refractory castables used in metallurgical field.
研究领域:
材料科学
·
耐火材料
·
陶瓷
·
高温工程
·
冶金
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Qiaoshan Chen,Hanqiang Zhou,Jianchun Wang,Jinhong Bi,Fan Dong
Vast progress in semiconductor photocatalysis has been witnessed, while the earth-abundant insulators were seldomly explored. In this work, we exploited insulator BaSO 4 as photocatalyst by constructing a novel branch of insulator-semiconductor heterostructure with the narrow-gap CuS. The finely designed BaSO 4 -CuS heterostructure achieved a tetracycline (TC) degradation pseudo-first-order kinetic constant of 1.4 × 10 −2 min −1 , which was 311, 21 and 18 times higher than that of BaSO 4 , CuS and their physical mixture, respectively. Density functional theory (DFT) calculations unraveled that the intense Cu-O covalent interaction created a specific channel for interfacial electrons transfer from semiconductor to insulator. The elevated redox potential of CuS is vital for the accumulation of ·O 2 - and motivation of ·OH, thus remarkedly accelerating TC mineralization. Furthermore, the degradation pathway and intermediates of TC were thoroughly studied through LC-MS. The current work provides new perspectives to harvest visible-light-driven insulator photocatalysts and demonstrates its promising applications for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 9
·5013-5027
·
IF 3.502
Yongbao Xiao,Yao Ji,Yichen Ye,Shujing Huang,Weichao Wang
Alkali-earth-metaphosphate-based fluoro-sulfo-phosphate M(PO 3 ) 2 –AlF 3 –MSO 4 (MPFS, M = Ca, Sr, Ba) glasses have been developed via simultaneously incorporating fluoride and sulfate into metaphosphate glass. Their glass-forming regions were efficiently determined under the guidance of thermodynamic calculation method. The physical and structural properties of BaPFS glass were investigated in detail. Furthermore, near-infrared spectroscopic properties of Er 3+ -doped BaPFS (Er–BaPFS) glass were studied. Physical parameters, such as Abbe's number ν d (55-75) and nonlinear refractive index n 2 (1.17-1.86 × 10 −13 esu), of BaPFS glass are strongly depended on P/F/S ratio. The structure of BaPFS glass gradually depolymerizes and tends to become multianionic when Ba(PO 3 ) 2 is substituted by AlF 3 and BaSO 4 . Anion-substitution strategy effectively modulates the property and structure of glass, providing a scheme to derive glass materials. In addition, enhanced emission at ~1.5 μm has been observed from Er–BaPFS glass along with large emission cross section (5.0-5.5 × 10 −21 cm 2 ) and long lifetime (6.7-7.3 ms), resulting in large figure of merit (3.46-3.84 × 10 −23 cm 2 ·s), which is a promising candidate for solid-state laser.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianle Liu,Shitian Zhao,Guokun Yang,Mingsheng Chen,Junhui Kou,Weijian Wang,Guosheng Jiang,Shaojun Zheng
Prominent thermal management, electromagnetic interference(EMI) shielding, and anti-ionizing radiation capabilities are essential trends in developing flexible materials. In this study, we developed a novel flexible MXene/polyvinyl alcohol/ microencapsulated phase change material (MPM) phase change composite film with a sandwich structure using an alternating vacuum filtration method. This film demonstrates good toughness, strength, stability, and durability. Incorporating microencapsulated phase change material(MEPCMs) enhances the enthalpy of the films (110.2J/g). Additionally, due to the incorporation of phase change microcapsules with a unique barium sulfate-based (BaSO 4 ) as the wall material, the films not only possess EMI shielding performance(39.7 dB), but also exhibits resistance to ionizing radiation(4.62 cm 2 g −1 ). Notably, the film can convert light and electrical energy into heat and store this heat as latent heat within the MEPCMs, enabling multi-source thermal management capability. The ease of preparation and exceptional performance of MPM make it highly suitable for a wide range of industrial and wearable applications.
研究领域:
材料科学
·
能源工程
·
辐射防护
·
柔性材料开发
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2016
·Vol. 13
·期 6
·1602055
·
IF 8.315
Ding Zhou,Yuechen Zhai,Songnan Qu,Di Li,Pengtao Jing,Wenyu Ji,Dezhen Shen,Andrey L. Rogach
Carbon nanodots (CNDs)@BaSO 4 hybrid phosphors are fabricated in an easy and low-cost process by sequentially assembling Ba 2+ and SO 4 2− ions onto the surface of carbon nanodots through electrostatic attraction. CNDs act as the nucleus to attract these reactive ions and provide the luminescent centers in the hybrid phosphors. This strategy is versatile for a variety of negatively charged CNDs with different emission colors. The advantage of the resultant hybrid phosphors is that their luminescence exhibits excellent thermal and photostability, as well as remarkable resistance to strong acid/alkali and common organic solvents. These merits allow for the fabrication of CNDs-based light-emitting diodes using the CNDs@BaSO 4 hybrid phosphors as a color conversion layer.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）