International Journal of Environmental Research and Public Health
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2022
·Vol. 19
·期 14
·8683
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IF 4.614
Xiang Guo,Lei Rao,Zhenyu Shi
Adsorption can quickly remove pollutants in water, while photocatalysis can effectively decompose organic matter. B-TiO2/g-C3N4ternary composite photocatalytic materials were prepared by molten method, and their adsorption–degradation capability under visible light conditions was discussed. The morphology of the B-TiO2/g-C3N4materials was inspected by SEM, TEM, BET, and EDS, and the results showed that close interfacial connections between TiO2and g-C3N4, which are favorable for charge transfer between these two semiconductors, formed heterojunctions with suitable band structure which was contributed by the molten B2O3. Meanwhile, the molten B2O3effectively increased the specific surface area of TiO2/C3N4materials, thereby increasing the active sites and reducing the recombination of photogenerated electron–hole pairs and improving the photocatalytic degradation abilities of TiO2and g-C3N4. Elsewhere, the crystal structure analysis (XRD, XPS, FTIR) results indicated that the polar -B=O bond formed a new structure with TiO2and g-C3N4, which is not only beneficial for inhibiting the recombination of electron holes but also improving the photocatalytic activity. By removal experiment, the adsorption and degradation performances of B-TiO2/g-C3N4composite material were found to be 8.5 times and 3.4 times higher than that of g-C3N4. Above all, this study prepared a material for removing water pollutants with high efficiency and provides theoretical support and experimental basis for the research on the synergistic removal of pollutants by adsorption and photocatalysis.Keywords:adsorption;degradation;B2O3;TiO2/C3N4;molten
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
APPLIED PHYSICS LETTERS
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2022
·Vol. 120
·期 19
·
IF 3.971
Wang Ping,Chen Jun-Liang,Zhou Qi,Liao Yun Tiao,Peng Ying,Liang Ji Sheng,Miao Lei
Ag 2 Se is an attractive candidate for room temperature thermoelectric applications because of its extremely low thermal conductivity, large power factor, and excellent mechanical properties. However, its performance is difficult to be improved effectively by doping other atoms. The traditional synthesis processes have the disadvantages of low yield, complex steps, and long period. In this study, the Ag 2 Se 1+ x samples were rapidly synthesized by the melting method via changing the ratio of Ag and Se. The carrier concentration and mobility of Ag 2 Se are optimized by adding excess Se, which could regulate non-stoichiometric defects in the process of synthesis. A high Seebeck coefficient of ∼136.0 μ V K −1 , a large power factor of ∼3000.0 μ W m −1 K −2 , and the maximum figure of merit ( ZT ) of ∼1.02 of the Ag 2 Se 1.015 sample have been achieved at 375 K. The ZT value is 2.3 times than that of the pristine sample (Ag 2 Se). The mechanical properties of the molting sample are comparable to state-of-the-art thermoelectric materials. Finally, the highest ZT value of the material is predicted by factor B . This work provides an idea for further optimizing Ag 2 Se-based and other non-stoichiometric thermoelectric semiconductors by a slight excess of Se. Moreover, the fast synthesis technology can significantly save time and energy, which manifests great advantages to the wholesale manufacturing industry.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Qihan Meng,Lei Wang,Fei Chen,Qingfei Hao,Xudong Sun
Ramsdellite-type Li 2 Ti 3 O 7 (R-Li 2 Ti 3 O 7 ) hollow microspheres were successfully prepared for the first time by the flame melting method. The hollow microspheres are 50-120 μm in diameter and about 10 μm in shell thickness. The spherical morphology allows for a high tapping density (1.25 g cm −3 ), and the hollow structure increases the specific surface area which is beneficial to the electrochemical properties. Thus, the prepared R-Li 2 Ti 3 O 7 shows excellent electrochemical properties even at high tapping densities. A specific capacity of 212.1 mAh g −1 can be obtained at a rate of 0.1 C, and the capacity retention after 500 cycles at 1 C is 94.6% with a specific capacity of 150.3 mAh g −1 . The flame melting method is effective for the preparation of Li 2 Ti 3 O 7 hollow spheres which showed good performance as the anode for lithium-ion batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Meng Xu,Menghua Zhu,Dou Zhao,Sixin Chen,Shilin Liu,Quanchao Zhang,Pei Yuan,Binbin Zhang,Paul Sellin,Wanqi Jie,Yadong Xu
In comparison to inorganic counterparts, organic semiconducting (OSC) crystalline films are promising for building large-area and flexible ionizing radiation detectors for X-ray imaging or dosimetry due to their tissue equivalence, simple processing and large-scale production accessibility. Fabrication processes, however, hinder the ability to generate aligned and large-area films with high carrier mobility. In this work, the space-confined melt process is used to produce highly orientated 4HCB (4-hydroxycyanobenzene) OSC films with a large area of 15 × 18 mm 2 . The out-of-plane direction of the 4HCB film is <001>, and the benzene rings are found to be extensively overlapped inside the in-plane direction, according to the XRD patterns. The film exhibits a high resistivity up to 10 12 Ω cm, and high hole mobility of 10.62 cm 2 V −1 s −1 . Furthermore, the 4HCB (80 μm-thick film) based X-ray detectors can achieve a sensitivity of 93 μC Gy air −1 cm −2 and on/off ratio of 157. The device also shows steady flexibility, with no degradation in detecting function after 100 cycles of bending. Finally, the proposed 4HCB film detectors demonstrated a high-resolution X-ray imaging capability. The imaging of several materials with sharp edges (copper and polytetrafluoroethylene) has been obtained. This work has developed a fast but efficient approach for producing large-area, highly oriented OSC films for high-performance X-ray detectors.
研究领域:
材料科学
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医学影像
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有机电子学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2014
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IF 4.086
Zhenxia Zhao,Dan Qin,Sha Wang,Guohua Chen,Zhong Li
A high-rate sulfur/carbon cathode is prepared by using high conductive hierarchical porous carbon-carbon fiber weave-structured (HPC-CF) materials as carbon host to disperse sulfur. Sulfur is infiltrated into porous carbon with meso/micropores by using an improved vapor-melting adsorption method, which aims to enhance sulfur dispersion and interaction with carbon host. Meanwhile, carbon fiber with weaved structure can connect the dispersed micron S/HPC particles on the current collector. As a result, a highly conductive network around the sulfur particles finally forms in the sulfur/carbon cathode. Results show that improved vapour-melting method can efficiently enhance the sulfur dispersion and interaction with carbon host. Electrochemical measurements show that both of the rate capacity and cycle stability of the sulfur/carbon cathode are significantly improved. It delivers a very high initial discharge capacity of 1692.9 mAh g −1 at 0.1 C, and maintains 1030 mAh g −1 after 130 cycles at 0.5 C. Furthermore, the weave-structured HPC-CF carbon materials increases the conductivity effectively, which enhances the rate performance of the prepared S/HPC-CF cathode. It shows 670.8 mAh g −1 at the first cycle and remains 520 mAh g −1 after 200 cycles at 6.0 C with an average coulombic efficiency of 97.8%. The excellent cycle and rate performance of the prepared S v-m /HPC-CF can be attributed to the high cathode conductivity, high sulfur utilization and strong interaction between sulfur and the HPC-CF materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 19
·2200571
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IF 6.389
Tingyu Yang,Yihua Zhu,Xiaoling Yang,Jianhua Shen
Perovskite quantum dots (PQDs) have attracted widespread attention in optoelectronic fields due to their excellent optical properties. However, their instability issue hampers their further development and practical application. Herein, CsPbBr 3 PQDs embedded in mesoporous SiO 2 microspheres (CsPbBr 3 PQDs/MSs) are prepared by the high-temperature solid-phase melting method due to the confinement effect. The prepared CsPbBr 3 PQDs/MSs are treated by saturated Na 2 SO 4 to form PbSO 4 precipitation to fulfill the mesoporous gap. And such treatment endows the QDs with excellent water, light irradiation, and heating stability. The prepared products can maintain over 80% of the original fluorescence intensity even when it is immersed in water for 2 weeks. The CsPbBr 3 PQDs/MSs are utilized in the white light-emitting diode device with Commission Internationale de L'Eclairage color coordinates of (0.3407, 0.3357) at 20 mA, and exhibit excellent photo stability at high power.
研究领域:
材料科学
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光学工程
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纳米技术
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产品关联
DOI
高影响因子
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
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2018
·Vol. 43
·期 1
·93-111
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IF 3.929
Shenyang Y. Zhang,Hongluo L. Zhang,Zhenhui Hou,Dmitri A. Ionov,Fang Huang
A rapid sample preparation procedure is described to determine trace element compositions of peridotites using LA-ICP-MS. Peridotite powders were fused with albite in a molybdenum–graphite assembly to obtain homogeneous glasses. Best conditions for the fusion procedure (heating at 1500–1550 °C for 10–15 min with a sample-to-flux ratio of 1:2) were constrained with melting experiments on two USGS reference materials, PCC-1 and DTS-2B. Mass fractions of first series transition elements, Ba and Pb, in quenched glasses of PCC-1 and DTS-2B are consistent with published data within 10% RSD. Three spinel peridotite xenoliths from eastern China were analysed following both our method and conventional solution ICP-MS. Compared with solution ICP-MS, the relative deviations of our method for most elements were within 10%, while for the REE, Ta, Pb, Th and U, the relative deviations were within 20%. In particular, volatile elements (e.g., Pb and Zn) are retained in the glass. Compared with conventional wet chemistry digestion, our method is faster. Additional advantages are complete sample fusion, especially useful for samples with acid-resistant minerals (spinel and rutile), and long-term conservation of glasses allowing unlimited repeated measurements with microbeam techniques. The same approach can be used for analyses of other mantle rocks, such as eclogites and pyroxenites.
研究领域:
地球化学
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矿物学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Bao Jiang,Hongheng Chen,Xianmeng He,Lei Wu,Xueyin Fu,Yi Huang,Qun Jing,Zhaohui Chen
Rare-earth ions have garnered significant attention due to their large ionic radii and unique electronic configurations. In this study, two scandium-based pyrophosphates, ASc2(P2O7)2 (A = Ba, Pb), were successfully synthesized by using a high-temperature melting method. They are the first reported examples of divalent cations binding to scandium-based pyrophosphates. The anionic backbones in their structures are all based on Sc–P–O frameworks, and two distinct cluster configurations are observed: cyclic [ScP2O10] and linear [ScP2O11] clusters. A comprehensive comparison of Sc/Y-based pyrophosphates reveals a strong correlation between the Sc–P–O configurations and the A-site cationic coordination environments. This work also investigated the influence of cations on the P–O configuration of existing Sc/Y-based pyrophosphates, which also offers useful reference for the synthesis of novel scandium-based phosphates.
研究领域:
无机化学
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材料科学
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固态化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Fenghao Yu,Chaoxin Qiu,Cong Xiao,Yanxin Du,Lin Lai,Wei Ren,Wei Li,Liting Jiang,Xiaohua Luo,Shengcan Ma
At present, Ag-based thermoelectric materials have received extensive attention and have demonstrated excellent performance in related device application. Among them, AgBiSe 2 is a lead-free thermoelectric material that exhibits significant n -type doping characteristics. It has been previously reported that R Cl 3 -doping ( R denotes the rare earth elements) has achieved excellent results in some n -type thermoelectric materials. However, there is still a lack of systematic research on the effect of R Cl 3 doping on AgBiSe 2 based materials. In this work, n -type AgBiSe 1.98 polycrystalline materials doped with CeCl 3 (0.5–2 mol%) are successfully synthesized by the melting method in combination with spark plasma sintering (SPS) technique. Compared with AgBiSe 2 , the CeCl 3 -doped AgBiSe 1.98 samples have achieved a significant increase in thermoelectric figure of merit ( ZT ) value, which should be attributed to the higher power factor ( PF = S 2 σ ) and inherently low thermal conductivity. Specifically, a large ZT max of ∼ 0.65 is achieved at 733 K in the 2 mol% CeCl 3 -doped AgBiSe 1.98 sample, which shows an increase of 41 %. This study demonstrates that CeCl 3 -doping, as a novel strategy that can improve simultaneously n H and m *, reveals excellent optimization effects in the thermoelectric performance regulation of AgBiSe 2 -based materials.
研究领域:
材料科学
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热电材料
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凝聚态物理
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无机非金属材料
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Jiang Wu,Haowen Bai,Wenjie Qu,Guanying Cao,Yanjie Zhang,Jingjie Yu
CsPbBr 3 quantum-dot borosilicate microcrystals and Eu 3+ -doped CsPbBr 3 quantum-dot microcrystals with different concentrations of Eu 3+ are successfully prepared by high temperature melting. The particle morphology of the microcrystals is characterized by scanning electron microscopy (SEM). The fluorescence characteristics are analyzed by fluorescence spectroscopy and CIE chromaticity coordinates . In this research, CsPbBr 3 quantum dots are effectively coated with borosilicate microcrystals to improve the stability of CsPbBr 3 quantum dots while ensuring its strong green emission at 517 nm. The energy transfer from CsPbBr 3 quantum dots to Eu 3+ occurs after doping. When changing the concentration of Eu 3+ , the emission peaks of perovskite broaden and blue shift occurs (517 nm→474 nm). The CIE color coordinate moves from (0.0807, 0.7200) to (0.4537, 0.2724). Therefore, the continuous adjustment of solid perovskite materials from green light to blue light and then to red light region is realized.
研究领域:
材料科学
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纳米光学
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无机非金属材料
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光电子学
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发光材料
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固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 21
·1-13
·
IF 2.8
Sun Li,Wang Shuimiao,Bai Yuehao,Li Guang,Tao Yong,Wang Wei,Yang ChangAn
Lithium–sulfur (Li–S) batteries have garnered significant research interest owing to their exceptional theoretical energy density, coupled with the cost-effectiveness and environmental sustainability inherent in sulfur-based cathode materials. Nevertheless, the practical implementation of these systems remains impeded by challenges, such as the shuttle effect of soluble lithium polysulfide intermediates during cycling, which contributes to rapid capacity degradation and suboptimal electrochemical performance in current Li–S configurations. Herein, a sulfur-containing composite, S@V 2 O 5 /KB, was synthesized using a straightforward high-temperature melt synthesis method. The V 2 O 5 /KB composite was obtained by mixing vanadium pentoxide (V 2 O 5 ) and Ketjen black (KB) through a simple ultrasonic process, followed by high-temperature melting to yield the sulfur-containing composite, S@V 2 O 5 /KB. Constant current discharge tests demonstrated that the addition of KB as a conductive agent significantly improved the performance of the battery. The optimal performance was achieved when the mass ratio of V 2 O 5 to KB was 2:1. After 100 cycles at a rate of 0.5C, the capacity of 678.3 mA h g −1 was retained, resulting in a capacity retention rate of 71.67%.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Lei Wu,Xudong Leng,Bao Jiang,Xueyin Fu,Yi Huang,Xue Yu,Qun Jing,Zhaohui Chen
By leveraging second-harmonic generation (SHG) capabilities, ultraviolet (UV) nonlinear optical (NLO) crystals can efficiently produce UV coherent light and are essential components for advancing UV solid-state laser systems. Herein, two new bismuth phosphates, Rb1.32Bi3.56P2O11 (I) and K1.08Bi3.64P2O11 (II), were synthesized via a high-temperature melt method. Of them, Rb1.32Bi3.56P2O11 exhibits a significant phase-matching SHG response (2.8 × KDP) and large birefringence (0.062 @ 532 nm, 0.053@1064 nm), along with an expanded UV transmission window. Moreover, theoretical analyses revealed that the optimized optical polarizability of Rb1.32Bi3.56P2O11 primarily arises from the cooperative effects of the one-dimensional (1D) polycationic Bi(2)Bi(2)×Bi(1)Bi(1)×Bi(1)Bi(1)×Bi(2)Bi(2) ribbons and [PO4] tetrahedron. We believe the work will provide a valuable strategy to design UV NLO materials with good performances.
研究领域:
材料科学
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光学
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无机化学
·
固体物理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）