INORGANIC CHEMISTRY
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2018
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IF 4.7
Xiaofang Li,Chen Chen,Wenhua Xue,Shan Li,Feng Cao,Yuexing Chen,Jiaqing He,Jiehe Sui,Xingjun Liu,Yumei Wang,Qian Zhang
An n-type Bi-doped SnSe was synthesized by a facile solution method followed by spark plasma sintering. We used bismuth(III) 2-ethyhexanoate as a cationic dopant precursor, which can absorb on the powder surface and then diffuse into the lattice to realize the substitution of Sn by Bi. A strip structure with low-angle boundary was constructed for effective phonon scattering. With increasing content of Bi, the carrier concentration decreased from 1.35 × 1019 cm–3 (p-type) in undoped SnSe to 4.7 × 1014 cm–3 (n-type) in Sn0.99Bi0.01Se and then increased to 1.3 × 1015 cm–3 (n-type) in Sn0.97Bi0.03Se. The Seebeck coefficient changed from positive to negative and presented n-type conducting behavior in the whole measured temperature range from 300 to 773 K, reaching a maximum absolute value of ∼900 μV K–1 at room temperature and ∼300 μV K–1 at 773 K. Considering the rich variety of metal 2-ethylhexanoates, higher thermoelectric performance is expected by different cationic doping in solution-synthesized nanomaterials.
研究领域:
材料科学
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热电能源
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Jun Chen,F. Xu,L. Sun,Kexiang Zhang,Yongpeng Xia,Xiaolei Guo,Huanzhi Zhang,Fang Yu,Erhu Yan,Hongliang Peng,Pengru Huang,Shujun Qiu,Cuili Xiang,Yujie Sun
In this work, Ni-Bi-B alloy has been synthesized via chemical synthesis method . A new kind of Al-InCl 3 -(Ni-Bi-B) composite has been prepared by high energy mechanical ball grinding Al powder with additives. Results show that the doped Ni-Bi-B alloy can significantly improve the hydrogen generation performance of Al-InCl 3 and the catalytic activity is enhanced with the increasing content of Bi in Ni-Bi-B alloy. Under optimal conditions, the hydrogen generation yield and conversion yield of Al-InCl 3 -(Ni-Bi-B) reached 1196.8 mL g −1 and 100.0% at room temperature, respectively. Mechanism study shows five kinds of active sites, such as the fresh surface/defect of Al particle , Al-AlCl 3 , Al-In, Al-Bi/B and Al-Ni/B produced during the ball milling process. Their synergistic effect enhances the hydrogen generation performance of Al-InCl 3 -(Ni-Bi-B) remarkably. In general, the proposed Al-InCl 3 -(Ni-Bi-B) composite is possible to serve as hydrogen generation material for fuel cells.
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
CHEMICAL PHYSICS
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2024
·
IF 2
Xing-Fei Guo,Quan Li,Hai-Tao Ren,Jing Wang,Xu Han
Mesoporous TiO 2 with a homogeneous Bi-Ag bimetallic distribution (Bi@Ag@MTs) can be obtained by calcination of a titanium-based metal organic framework (MOF, MIL-125) with Bi and Ag loading and applied to the photocatalytic reduction of nitrate using formic acid as a hole scavenger. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS) analyses show that Ag(I) and Bi(III) are present in MTs as fine clusters and Bi@Ag@MTs have a specific pancake structure, which provides a good carrier for photocatalytic reaction. The contents of Ag and Bi in Bi@Ag@MTs can be up to 2.28 wt% and 0.54 wt% analysed by Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Under UV irradiation, Bi@Ag@MTs(0.2,0.4) showed a high reduction rate (3.28 h −1 , 4.2 times that of P25), high conversion (100 %, 1.3 times that of P25) and high N 2 selectivity (89.2 %, 2.1 times that of P25) for nitrate reduction. In addition, Bi@Ag@MTs(0.2,0.4) showed good reusability, with the respective NO 3 − conversion and N 2 selectivity still reaching 82.2 % and 78.0 % after four cycles. X-ray photoelectron spectroscopy (XPS) analysis showed that under UV irradiation, part of Ag(I) would be reduced to Ag 0 , and the formed Ag-Ag 2 O structure helped to improve the photocatalytic activity of the catalyst. This preparation strategy provides assistance in the design of photocatalytic materials with significant activity and durability for nitrate reduction.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MODERN PHYSICS LETTERS B
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2017
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IF 0.617
Peiju Hu,Wei Zhang,Zhengfa Hu,Zuyong Feng,Lun Ma,Xiuping Zhang,Xia Sheng,Li Luo,Yinhai Wang
Dy-Bi co-doped yttrium tungstate crystal materials were synthesized by high temperature solid-state method. To reveal the photoluminescence features and properties of the samples, some measurements have been taken. It turned out that different Bi 3 + concentrations play obvious influence in emission performance, and show visible light emission under ultraviolet light excitation. Besides, the effect of temperature on phase structure of samples has also been studied here. Superhigh X-ray luminescence of the phosphors exhibited the promising application in the field of high energy detection. The X-ray irradiation crystal resistance stability of the phosphors has also been investigated through the subsequent testing of XRD and spectra.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
Chenxi Guo,Mingxue Deng,Dongxin Shi,Xinyu Gong,Siyi Yu,Mengchao Xue,Keke Han,Boyuan Wang,Jiacheng Wang,Fengfeng Li
Fluorescent materials have been widely used in the field of anti-counterfeiting, but traditional fluorescent patterns are static by design, which only offer a limited level of security for anti-counterfeiting encryption. Herein, we provide a novel dynamic anti-counterfeiting strategy by constructing a flexible, long afterglow film with Bi-activated Sr 3 Y 2 Ge 3 O 12 phosphors. Theoretical calculation indicates that the Sr 3 Y 2 Ge 3 O 12 garnet matrix with suitable energy bands shows high adaptability for Bi ions activator to produce long afterglow emission. Doping of Bi ions into the framework of Sr 3 Y 2 Ge 3 O 12 exhibits a blue luminescence centered around 469 nm. The afterglow intensity and decay time reach the optimal with Bi 3+ doping concentration of 0.75 mol%. Various characterizations show that the electron traps mainly come from oxygen vacancies in the long afterglow process, and a possible afterglow mechanism is also proposed. A flexible, long afterglow film prepared by compositing with Sr 3 Y 2 Ge 3 O 12 :Bi 3+ can be written into the image information by ultraviolet light and present a dynamic image in the form of afterglow. The information decryption could be further performed by thermal excitation. The results illustrate that the Bi-activated Sr 3 Y 2 Ge 3 O 12 flexible film is a potential luminescent material that can be used for dynamic anti-counterfeiting and encryption.
研究领域:
材料科学
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光学
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DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 10
·1701574
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IF 4.834
Peng Guan,Hongye Bai,Chunfa Li,Yilin Ge,Dongbo Xu,Biyi Chen,Teng Xia,Weiqiang Fan,Weidong Shi
Overcoming one of most challenging limitations of bare TiO 2 with large bandgap can be achieved by rational design and fabrication of heterostructures. Multicomponent sulfides with a nature of tunable band structure can be a good alternative to decorating TiO 2 , but there remains a major trade-off between the high efficiency and the long-term durability, so the stability issue must be addressed upon the use of sulfides. Here, an effective strategy is demonstrated with Bi-doped AgIn 5 S 8 (Bi-AgIn 5 S 8 ) decorated TiO 2 photoanode, where twofold enhancement of the photocurrent is achieved. More importantly, it is the first time to integrate polydopamine passivation layer and AgIn 5 S 8 for simultaneously enhancing the solar conversion efficiency and stability. The incident photon-to-current conversion efficiency value is tuned up to 45% (0.4 V vs Ag/AgCl), and the photocurrent density can keep for 90.8% after 5 h. Corresponding hydrogen evolution rate has increased to 8.6 µmol h −1 , which is three times higher than that of bare TiO 2 .
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Da Sheng,Qing He,Zhong-Hua Cao,Lun-Bo Chen,Song-Hai Wu,Yong Liu,Hai-Tao Ren,Xu Han
Although photooxidation of benzyl alcohol to benzaldehyde in aqueous solution is an important chemical process, its selectivity cannot be readily controlled due to the overoxidation of benzaldehyde. In this study, a series of Bi–Mo/CN photocatalysts are synthesized, and their reactivity in photooxidation of benzyl alcohol under visible light is compared. Bi–Mo/CN-2 exhibits high photocatalytic reactivity in the conversion of benzyl alcohol (51%) with a high selectivity toward benzaldehyde of 99.9%. In this process, the formed ≡Bi–OO• and ≡Bi–OOH selectively oxidize benzyl alcohol to benzaldehyde via the H-abstraction pathway after O2 is photoreduced on Bi–Mo/CN, accompanied by the formation of H2O2. Meanwhile, the doped Mo utilizes the produced H2O2 or ≡Bi–OOH to produce ≡Mo–O2 peroxo, which not only contributes to the selective oxidation of benzyl alcohol to benzaldehyde but also effectively prevents overoxidation of benzaldehyde. This work provides new insight into designing novel photocatalysts for selective oxidation of organic substrates.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2021
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IF 7.267
Pan Zhang,Yuanyuan Cui,Yongji Yao,Wei Wei,Yuanyuan Sun,Kaiqiang Zhang,Yanfeng Gao
Developing cheap and efficient materials for enhancing the photochromic performance upon visible or solar light irradiation is a hot-topic in the field of solar energy conversion . However, few inorganic photochromic materials can provide satisfying applications due to their low coloring and bleaching efficiency as well as slight color change. Here, we synthesized the bismuth tungstate (Bi 2 WO 6 ) ultrathin nanosheets with the thickness of 1.29 nm via co-precipitation-hydrothermal method using cetyltrimethylammonium bromide (CTAB) surfactant . The prepared ultrathin nanosheets show the similar crystalline structure but a narrowed band gap of 2.73 eV, as compared with the 2.86 eV of pristine Bi 2 WO 6 . Additionally, the numerous [WO 6–x Br 2x ] species and abundant “Bi–O″ vacancy pairs on the surface can serve as active sites that suppress the recombination of photogenerated electron-hole pairs and capture the photogenerated electrons to form the color trapping centers. As a result, Bi 2 WO 6 ultrathin nanosheets exhibit excellent photochromic behavior upon solar light irradiation (coloring time of 5 s) and under dark atmospheric treatment (bleaching time of 35 min) compared with WO 3 -based photochromic materials (coloring time of 20–60 min and bleaching time of 3 h days).
研究领域:
材料科学
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太阳能转换
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2023
·
IF 6.4
Zeqing Hu,Rong Wei,Chen Yan,Han Wan,Yu Liu,Longjiu Cheng,Zhou Li,Jiming Song
In this work, carrier concentration optimization and effective mass increase of Cu2GeSe3, which were considered to be a synergetic effect of electrical transport properties, were achieved by the co-doping of Bi and Zn on the Cu site. This effect led to a higher Seebeck coefficient of ∼307.76 μV K–1 at 723 K for the Cu1.988Bi0.01Zn0.002GeSe3 sample. This effect also resulted in a higher power factor of ∼8.66 μW cm–1 K–2 at 723 K and an average power factor of ∼6.29 μW cm–1 K–2 at the temperature range of 303–723 K for the Cu1.988Bi0.01Zn0.002GeSe3 sample, which were ∼135 and ∼196% larger than those of pristine Cu2GeSe3, respectively, and are among the highest value of the Cu2GeSe3-based sample. Benefiting from simultaneous optimization of the power factor, the maximum ZT of ∼0.75 for the Cu1.988Bi0.01Zn0.002GeSe3 sample at 723 K was obtained, which is ∼288% higher than that of Cu2GeSe3.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
Chem Catalysis
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2022
·
IF 0
Wenjie Wu,Yulu Yang,Yitong Wang,Tiantian Lu,Qingsong Dong,Junwei Zhao,Jingyang Niu,Qingchao Liu,Zhaomin Hao,Shuyan Song
Electrosynthesis of urea from N 2 and CO 2 molecules is of immense significance but has so far been plagued by the lack of a universal design principle to guide the search for new catalysts. Herein, as exemplified by the Cu-Bi catalyst, our findings revealed that the defective Cu-Bi catalyst could offer a maximum urea concentration of 0.45 ± 0.06 mg L −1 and the largest faradaic efficiency of 8.7% ± 1.7% at −0.4 V (versus reversible hydrogen electrode [RHE]), exhibiting outstanding activity in contrast to monometallic (Cu and Bi) and bimetallic (Cu-Bi mixture and intact Cu-Bi) catalysts. Moreover, the evidence from isotope tracing experiments, in situ Raman spectroscopy, and density functional theory (DFT) calculations suggested that it is a promising strategy for the co-reduction of N 2 and CO 2 by defective Cu-Bi catalysts, switching on a light to the application of defects in electrosynthesis of urea.
研究领域:
化学工程
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材料科学
·
催化反应
✓ 已验证
DOI
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Ruizhuo Ouyang,Weixian Xue,Penghui Cao,Zhengang Sun,Huihui Wang,Xiaoqing Zhang,Shuang Zhou,Yuqing Miao
Doxorubicin (DOX), a widely used chemotherapeutic agent, is severely limited by systemic toxicity. Conventional nanomaterials exhibit limited drug-carrying capacity and targeted delivery efficiency, while the biocompatibility of these materials remains a critical consideration. Here we report a novel type of superhydrophilic mesoporous nanomaterial, synthesized by combining bismuth and 2-methylimidazole (Bi-MEI), designed as a biocompatible and pH-sensitive drug carrier for the delivery of the anticancer drug DOX to combat tumor proliferation and metastasis. Superhydrophilic Bi-MEI pH-responsive nanoplatform (Bi-MEI PSNs) was prepared using bismuth-oxo clusters, 2-methylimidazole ligands, and electronegative citrate under high-temperature and hypoxic conditions. The resulting material demonstrated excellent blood compatibility and low cytotoxicity in vitro due to the superhydrophilicity. DOX was effectively loaded into Bi-MEI PSNs without further surface modification, which exhibited a pH-sensitive release profile. Additionally, the citrate incorporated into Bi-MEI PSNs significantly enhanced its drug-loading efficiency. In acidic environments, such as those found in cancer tissues or subcellular endosomes, Bi-MEI PSNs disintegrated, releasing the free drug, which significantly facilitated the intravenous delivery of DOX into cancer cells for chemotherapy and effectively minimized the side effects. Furthermore, the synthesized Bi-MEI PSNs exhibited strong performance in computed tomography (CT) imaging and was successfully applied for CT imaging-guided tumor treatment. In a nude mouse model of transplanted lung tumors, remarkable therapeutic effects were achieved as predicted. This stable and efficient nanoplatform offers a promising strategy for more effective tumor treatment and improved prognosis.
研究领域:
药学
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生物医学工程
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）