Inorganic Chemistry Frontiers
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2022
·Vol. 9
·期 21
·5562-5571
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IF 7.779
Fudong Zhang,Xia Qi,Mingkai He,Fengshan Zheng,Lei Jin,Zhanhui Peng,Xiaolian Chao,Zupei Yang,Di Wu
Previous studies have revealed that both Bi doping and Bi2Te3 alloying are successful strategies to optimize the thermoelectric performance of SnTe; however, detailed and thorough investigations on exactly how they differ in modulating the band structure and microstructure were seldom given. Through a systematic comparison between Bi-doped and Bi2Te3-alloyed SnTe, we find in this work that despite the fact that they both contribute to the valence band convergence of SnTe, Bi2Te3 alloying induces little effect on the hole concentration unlike the typical n-type feature of Bi-doping; moreover, Bi2Te3 alloying tends to produce dense dislocation arrays at micron-scale grain boundaries which differs significantly from the substitutional point defect character upon Bi-doping. It was then found that Bi2Te3 alloying exhibits a relatively higher quality factor (B ∼ μw/κlat) at higher temperatures than Bi-doping. Subsequent Ge-doping in Bi2Te3-alloyed samples results in further valence band convergence and hole concentration optimization and eventually results in a maximum figure of merit ZT of 1.4 at 873 K in the composition of (Sn0.88Ge0.12Te)0.97-(BiTe1.5)0.03.
研究领域:
材料科学
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热电材料
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 12
·e202500499
·
IF 2
Tianzhu Shao,Qi Wang,Jiahao Wei,Gonggang Sun,Xinbao Li
Graphical The study focuses on the synthesis of SCR catalysts with high activity and excellent alkali resistance. The redox performance and surface acidity of VWTi are enhanced and the atomic valencies is optimized through the doping of Ce and Bi. Therefore, the catalytic activity of the catalyst is significantly enhanced and excellent catalytic activity is maintained even after KCl poisoning. Ce-doped V 2 O 5 -WO 3 /TiO 2 (CeVWTi) and its subsequent modifications have been recognized as effective catalysts for the selective catalytic reduction of NO. Herein, CeVWTi catalysts doped with varying amounts of bismuth sulfate (Bi 2 (SO 4 ) 3 ) were synthesized and evaluated for their activity and alkali resistance. These catalysts were characterized using XPS, BET, SEM, H 2 -TPR, NH 3 -TPD, and XRD techniques. The optimal doping level of Bi 2 (SO 4 ) 3 was 1 wt.%. The NO conversion rate of the catalyst co-doped with Ce and Bi was 71.6% under the reaction conditions of 300 °C, gas hour space velocity (GHSV) = 200,000 h −1 with a gas composition of 550 ppm NO, 550 ppm NH 3 , 5.6% O 2 , and N 2 as the balance. The NO conversion efficiency of the Bi 0.01 CeVWTi catalyst was maintained at 90.7% after the addition of 1 wt.% KCl poisoning under the reaction conditions of 350 °C, GHSV = 200,000 h −1 , 550 ppm NO, 550 ppm NH 3 , 5.6% O 2 , and N 2 as the balance. Characterization showed that, despite the reduction in the specific surface area of the catalyst and some acidic sites due to Bi doping, the redox performance of Bi 0.01 CeVWTi was significantly enhanced. The excellent redox performance was maintained even after KCl poisoning.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Wenhao Fan,Shaoping Chen,Bo Zeng,Qiang Zhang,Qingsen Meng,Wenxian Wang,Zuhair A. Munir
Solid solutions of Mg2Si0.6Sn0.4–xBix with 0 ≤ x ≤ 0.03 were prepared by a one-step synthesis and consolidation method, using MgH2 as a starting material. The thermoelectric properties of these samples were evaluated over the temperature range 300–775 K. Figure of merit, zT, values were determined over this range for all compositions and found to increase with temperature reaching a value of 1.36 at 775 K for samples with x = 0.02. Examination of the components of the total thermal conductivity showed that the bipolar thermal conductivity is suppressed by an increase in the band gap, resulting from solid solution formation, and by low minority carrier mobility. The suppression of the bipolar thermal conductivity is believed to be the consequence of charged grain boundaries.
研究领域:
材料科学
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热电学
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHARACTERIZATION
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2025
·
IF 5.5
Qi-Hua Yang,Han-Qi Wei,Shu-Juan Zhao,Gui-Hua Li,Xuan Liu,Le Fu,Zhi-Wei Luo,Jia-Yong Si,Ge-Mei Cai
In recent years, the proliferation of counterfeit products has led to increased concerns about anti-counterfeiting technology, with traditional single-mode fluorescence methods proving insufficient due to their susceptibility to replication. The new copper-based halide materials have shown great potential in the field of multi-mode anti-counterfeiting due to their unique structure, excellent luminescence performance, and high defect tolerance. In this work, near-infrared emission of Cs 3 Cu 2 I 5 was achieved for the first time through Bi doping. By exploiting the dual emission center characteristics of the resulting Cs 3 Cu 2 I 5 :Bi, we demonstrated its excitation wavelength-dependent emission. It was then mixed with cyclohexane to prepare an advanced fluorescent anti-counterfeiting coating for screen printing, enabling high-precision pattern printing onto various substrates. The resulting anti-counterfeiting patterns exhibit excellent weather resistance, remaining virtually unchanged after 60 days at room temperature. This study lays the foundation for expanding the emission range of Cs 3 Cu 2 I 5 and adjusting multi band emission, and confirms its potential application in the field of multi-mode anti-counterfeiting.
研究领域:
材料科学
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光学工程
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防伪技术
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Hongge Cao,Yuhang Wu,Ruicai Gao,Peijie He,Qiang Wu,Jixiang Cui,Longyan Gu,Tuo Cai,Ping Peng,Yan Lei,Yuan Lin,Zhi Zheng
Ag 2 S colloidal quantum dots (CQDs) are promising candidates for solution-processable and eco-friendly solar cell applications, but the power conversion efficiency is still far from its theoretical value (∼30 %). Where the migration of Ag ions in Ag 2 S CQDs may be responsible for this. In this work, to suppress the migration of Ag ions and further enhance the photoelectric properties of the Ag 2 S CQDs, Bi elements have been doped into the Ag 2 S CQDs via a facile route at low temperature. Without heat, the Bi content in the resulting Bi-doped Ag 2 S CQDs can be adjusted by adding raw BiI 3 in the reaction system. The photoelectric responsivity of Bi-doped Ag 2 S CQDs is about 6 times greater than that of the undoped Ag 2 S CQDs. Finally, solid-state solar cells have been constructed, and 1.5 % power conversion efficiency has been obtained. Current work may provide an avenue to produce high-quality Ag 2 S CQD-based photoelectric materials.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Sheng-Xun Cai,Xian-Qiang Song,Zong-Tao Chi,Yong-Qing Fu,Zheng-Tao Fang,Sun-Ying-Yue Geng,Ya-Ru Kang,Xiao-Xu Yang,Jian-Feng Qin,Wan-Feng Xie
Gas sensors based on metal oxide semiconductors (MOSCs) and reduced graphene oxide (rGO) for sensing of organic volatile compounds often suffer from high operation temperature, low responses, poor selectivity, or narrow detection range. Herein, we design and fabricate Bi-doped rGO/Co 3 O 4 (BGCO) nanohybrids with a flower morphology, which have been applied as a sensing layer for an ethanol sensor. This BGCO sensor exhibits a maximum p -type response of 178.1 towards 500 ppm ethanol at an optimum working temperature of 120 °C. The sensor’s detection range for the ethanol concentration is from 500 ppb to 500 ppm, and the sensor has an excellent selectivity to ethanol compared to other types of organic volatile gases and oxidizing gas such as NO 2 . The enhanced ethanol sensing mechanism is attributed to the increased conductivity of Bi doped rGO/Co 3 O 4 material. Additionally, incorporation of Bi dopant can promote the redox reaction, and the rGO/Co 3 O 4 act as the catalyst.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
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2021
·Vol. 129
·期 12
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IF 2.546
Liu Bo-Mei,Gan Wei-Jiang,Lou Sun-Qi,Zou Rui,Tang Qiang,Wang Cheng-Xin,Jiao Ju,Wang Jing
The development of functionalized persistent-luminescent (PersL) materials is currently receiving intense interest for diverse applications. However, PersL materials emitting ultraviolet light in the 315–400 nm (UVA) range are lacking. Herein, a series of x-ray-activated PersL materials based on ABCO 4 -type structures with random cation arrangements are developed. Comprehensive experiments confirm that materials featuring random cation arrangements are sufficiently general to act as host materials for PersL. Experimental results indicate that as-synthesized SrLaXO 4 :Bi 3+ (X = Al, Ga, In) powders have tunable PersL bands covering the UV-to-visible range after x-ray irradiation. Taking advantage of the depth-independent nature of x-ray illumination in tissues, UVA Persl composites using the matched photosensitizer g-C 3 N 4 (SrLaAlO 4 :Bi@g-C 3 N 4 ) are well suited for x-ray-activated photodynamic therapy, as proven by tests for singlet-oxygen ( 1 O 2 ) generation. Therefore, we suggest that the proposed concept be applied to discover additional functionalized PersL materials for clinical cancer therapy in the future.
研究领域:
材料科学
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医学
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生物工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Huanan Cui,Jianying Shi,Hong Liu
NaBiO 3 and Bi(NO 3 ) 3 were used to synthesize Bi-doped NaTaO 3 . The influence of the Bi chemical state on the photocatalytic activity was investigated using X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and diffused reflectance spectroscopy to study the structure, chemical state and light absorption characteristics, respectively. The photocatalytic activity was evaluated by the H 2 evolution water splitting reaction. The monoclinic phase of NaTaO 3 remained intact for the two Bi-doped samples, but the Ta–O–Ta bond was distorted from 180° after Bi doping. XPS results indicated that Bi 3+ was doped into NaTaO 3 with the Bi(NO 3 ) 3 precursor, while Bi 5+ and Bi 3+ were doped into NaTaO 3 with the NaBiO 3 precursor. The two samples showed identical light absorption, where doping with Bi extended the light absorption to long wavelength light as expected. However, Bi 3+ doping did not promote the photocatalytic activity of NaTaO 3 , while Bi 5+ and Bi 3+ doping did. The distorted Ta–O–Ta bond from 180° due to doping with Bi was detrimental for charge carrier transfer in the photocatalytic process. In contrast, the vacancies or defects in the NaTaO 3 lattice induced by Bi doping for charge balance were beneficial for charge carrier separation. The opposing action of these two factors resulted in the activity of the Bi 3+ -doped sample being comparable with pristine NaTaO 3 . For Bi 5+ - and Bi 3+ -doped NaTaO 3 , a high concentration of defects was induced by the high valence Bi 5+ ion and this led to its higher photocatalytic activity. Our results indicated that charge carrier transfer is a priority factor in the photocatalytic process and the doping of a high valence ion in the ABO 3 structure is a way to promote the separation of charge carriers.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Huidong Tang,Yanqiao Xu,Xiaobo Hu,Qing Hu,Ting Chen,Weihui Jiang,Lianjun Wang,Wan Jiang
Lead-free alloyed Cs 2 AgInCl 6 nanocrystals (NCs) are currently considered as a new class of lead halide perovskite alternative due to their less toxicity and excellent intrinsic stability. However, their solution preparation process with oleylamine as ligands are easy to the formation of metallic Ag due to the reduction of Ag + , resulting in poor photoluminescence (PL) performance of NCs. Herein, a facile one-pot solution synthesis strategy was proposed to prepare stable Bi 3+ doped Cs 2 AgInCl 6 NCs via tri-n-octylphosphine (TOP) as co-ligands, and the emission mechanism was further investigated. The prepared Bi 3+ doped Cs 2 AgInCl 6 NCs show broad dual emission bands at around 410 nm and 565 nm, in which the violet emission band is ascribed to the surface defect states, while the yellow emission band of as-synthesized NCs is attributed to the 3 P 1 → 1 S 0 self-trapped excitons recombination of Bi 3+ ions. Due to the introduction of BiCl 6 states after doping with Bi 3+ and well elimination of surface metallic silver by strongly coordinating of TOP, the PL quantum yield of as-synthesized NCs is obviously elevated from 1.25% to 5.10%. The prepared Bi 3+ doped Cs 2 AgInCl 6 NCs exhibit excellent storage stability and light stability, making it a promising single emitter fluorescence material for white light-emitting diode devices.
研究领域:
材料科学
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光学
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DOI
高影响因子
CHEMOSPHERE
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2020
·
IF 5.778
Jiaxin Li,Mo Li,Da Li,Qinxue Wen,Zhiqiang Chen
Coal gasification wastewater (CGW) contains a large amount of toxic pollutants , which seriously affects the subsequent biochemical treatment. In order to investigate the efficiency of electrocatalytic oxidation on pretreatment of CGW, lead dioxide electrodes doped with PEG and Bi were successfully prepared. Scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction were comprehensively used to characterize the lead dioxide electrode and the electrochemical performance was also tested by linear sweep voltammetry curve, cyclic voltammetry curve and AC impedance. Biodegradability and toxicity of CGW were evaluated by dehydrogenase activity and acute toxicity, respectively. Results showed that the doping of PEG and Bi significantly improved the electrochemical performance and catalytic oxidation performance of lead dioxide electrodes. The degradation rate of phenol by Sn–Sb/PbO 2 (PEG + Bi) electrode were 1.57 times of that by pure lead dioxide electrode. The removal of TOC and total phenols were 53.2% and 82.7%, respectively at 120 min under 40 mA cm −2 by Sn–Sb/PbO 2 (PEG + Bi) electrode. The changes of biodegradability, biological toxicity and by-products were analyzed. Furthermore, 3,5-dimethylphenol was used as characteristic pollutant to study the degradation mechanism of phenolic pollutants in electrocatalytic system. According to the intermediate products detected by GC-MS, possible degradation pathways in electrocatalytic system were proposed.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
PubMed
高影响因子
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Tao Zhang,Hongzheng Pu,Hanlu Zeng,Ying Zhou,Xiangnan Gong,Qian Ye,Chuanyao Yang,Dingfeng Yang,Yuanyuan Li
Orbital engineering is an important strategy for modulating light absorption in photocatalysis . Here, Bi doping of the oxide photocatalyst Li 2 SnO 3 to enhance light absorption was rationally designed by orbital engineering. Based on density functional theory, owing to the lower Bi 6s energy level compared with that of Sn 5s, a deep impurity energy level induced by ionic Bi–O bonds is generated in the middle band gap of Li 2 SnO 3 . The impurity energy level can facilitate the utilization efficiency of light absorption, leading to remarkably enhanced photocatalytic performance. For Li 2 Sn 0.9 Bi 0.1 O 3 , the photodegradation rate of tetracycline solution reached 76% within 30 min, which was approximately 2.6 times higher than that for Li 2 SnO 3 . A radical trapping experiment revealed that the holes (h + ) play a dominant role in the elimination reaction . Finally, liquid chromatography–mass spectrometry was performed to monitor the photocatalytic process. This study lays a foundation for rational design of photocatalysts with excellent light absorption for photocatalysis .
研究领域:
材料科学
·
光催化
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DOI
高影响因子
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