Nanoscale
·
2022
·Vol. 14
·期 39
·14520-14528
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IF 8.307
Weiwei Xu,Ningbo Fan,Shiji Xu,Linxing Meng,Bin Xu,Min Zhou,Wei Tian,Liang Li
Introducing suitable interfacial chemical bonds into heterojunctions can increase the charge carrier density, propel the charge separation, and facilitate interfacial charge extraction in photoanodes for photoelectrochemical (PEC) water oxidation. However, tuning chemical bonds at heterojunction interfaces and elucidating their influences on band alignment and the associated evolution of PEC performance remain elusive. Herein, Bi–S bonds were introduced into the interface of a CdIn2S4 (CIS)/Bi2WO6 (BWO) heterojunction. In situ irradiated X-ray photoelectron spectroscopy and electron spin resonance signals confirm that the Bi–S bond transforms the band alignment from type II to the direct Z-scheme, significantly enhancing the carrier separation efficiency. Theoretical calculations show that the Bi–S bond not only acts as an atomic-level charge transfer channel, but also changes the migration pathway and distance within the heterojunction. As a result, the optimized CIS/BWO photoanode exhibits a relatively high PEC performance of 4.25 mA cm−2 at 1.23 V vs. RHE (VRHE) and a low onset potential of 0.30 VRHE. This work presents a new avenue to construct comprehensively improved photoanodes by tuning the interfacial structures at the atomic level.
研究领域:
材料科学
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光化学
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电化学
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可再生能源
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 1
·1399-1412
·
IF 5.19
Chen Jun,Zhang Boding,Wang Bingxing,Zhang Wenlong,Wang Jichao,Cui Chengxing,Wang Songlin
Wastewater containing quinoline has become a common pollutant in water and soil environments, which poses a threat to human health due to its carcinogenicity, teratogenicity, and mutagenicity. Quinoline’s stability and toxicity hinders its degradation by conventional physicochemical and biological methods. In this contribution, Fe-Co-Bi/kaolin particle electrodes were prepared for the efficient degradation of quinoline in wastewater, and characterized by using scanning electron microscope, X-ray diffraction, pyridine-IR, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy, and four-probe resistivity test. Parameters affecting the degradation efficiency were optimized to be the particle electrode dosage of 40 g/L, pH 3.5, H 2 O 2 addition of 67.6 mmol/L, electrical conductivity of 12.7 ms/cm, and voltage of 20 V. The constructed three-dimensional catalytic particle electrode system (3D-CPE) achieved 92.1% removal rate of chemical oxygen demand (COD) under the optimal conditions. Hydroxyl radicals (•OH) generated in the 3D-CPE process were identified by radical scavenging tests and electron spin response analysis. To unravel the degradation mechanism, the intermediate products were identified by using high performance liquid chromatography-mass spectrometry. The degradation mechanism was discussed with the help of theoretical calculation.
研究领域:
环境工程
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水处理
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电化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 20
·2214771
·
IF 19
Jun Pei,Jian-Lei Shi,Hezhang Li,Yilin Jiang,Jinfeng Dong,Hua-Lu Zhuang,Bowen Cai,Bin Su,Jincheng Yu,Wei Zhou,Bo-Ping Zhang,Jing-Feng Li
GeTe and (Bi,Sb) 2 Te 3 are two representative thermoelectric (TE) materials showing maximum performance at middle and low temperature, respectively. In order to achieve higher performance over the whole temperature range, their segmented one-leg TE modules are designed and fabricated by one-step spark plasma sintering (SPS). To search for contact and connect layers, the diffusion behavior of Fe, Ni, Cu, and Ti metal layers in GeTe is studied systematically. The results show that Ti with a similar linear expansivity (10.80 × 10 −6 K −1 ) to GeTe, has low contact resistance (3 µΩ cm 2 ) and thin diffusion layer (0.4 µm), and thus is an effective metallization layer for GeTe. The geometric structure of the GeTe/(Bi,Sb) 2 Te 3 segmented one-leg TE module and the ratio of GeTe to (Bi,Sb) 2 Te 3 are determined by finite element simulation method. When the GeTe height ratio is 0.66, its theoretical maximum conversion efficiency (η max ) can reach 15.9% without considering the thermal radiation and thermal/electrical contact resistance. The fabricated GeTe/(Bi,Sb) 2 Te 3 segmented one-leg TE module showed a η max up to 9.5% with a power density ≈ 7.45 mW mm −2 , which are relatively high but lower than theoretical predictions, indicating that developing segmented TE modules is an effective approach to enhance TE conversion efficiency.
研究领域:
材料科学
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热电学
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能量转换
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固体物理
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Li Song,Benzheng Zhou,Zhiyao Fu,Zhi Ye,Shaowei Ruan,Junjia He
Bi₂O₃ is a critical additive in ZnO varistor formulations and requires uniform distribution to optimize electrical performance. Surface coating technology enables the synthesis of ZnO@Bi₂O₃ core-shell particles, effectively mitigating the uneven distribution of Bi₂O₃ within the particles. Among the currently reported synthesis methods of ZnO@Bi₂O₃, there are significant variations in the selection of core material (ZnO source), and the coating effects obtained from different coating processes are highly inconsistent. Additionally, the characterization of coating structures remains scarce in the literature. This study proposes a novel synthesis route for ZnO@Bi₂O₃ particles, utilizing commercial nano-ZnO powder as the core material to ensure industrial quality standards for ZnO in production. Bismuth ions (Bi³⁺) are deposited via chemical precipitation to form the shell layer. Hydrothermal treatment strengthens the core-shell binding, facilitates phase transformation, and final calcination purifies the product to achieve the Bi₂O₃ phase. The effects of pH value and Bi³ ⁺/Zn²⁺ molar ratio were systematically investigated. Prepared ZnO@Bi₂O₃ core-shell structures were thoroughly characterized and analyzed using X-ray diffractometry (XRD), energy dispersive spectroscopy (EDS), and high-resolution transmission electron microscopy (HRTEM). The results indicate that the optimal coating performance is achieved when pH= 10.5 and the Bi³ ⁺/Zn²⁺ molar ratio is near 0.05, whereby the Bi₂O₃ phase forms uniform belt-like and spherical shells on the ZnO surface. This research integrates the common industry powder preparation techniques, including chemical precipitation, hydrothermal reaction, and calcination, to establish a foundational basis for the industrialization synthesis of ZnO@Bi₂O₃.
研究领域:
材料科学
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纳米技术
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无机非金属材料
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电子陶瓷
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功能材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaolin Shen,Zhiliang Zhu,Xiaochang Liu,Renlu Qiao,Hua Zhang,Yanling Qiu
Reutilization of spent adsorbent by converting the adsorbed organic pollutants into carbon matrix has attracted more attention in recent years, which delivers a greener way for the preparation of catalysis and environment remediation. In this work, CuBi 2 O 4 after adsorption of pollutant sulfamethazine was further transformed to a photocatalyst CBO-WC500 with high catalytic efficiency for degradation of typical pharmaceuticals. The XAFS analysis proved that Cu-C chemical bond was constructed during the preparation process. The obtained CBO-WC500 was applied to remove sulfamethoxazole (SMX) through photocatalytic Fenton-like reaction, and removal efficiency reached 88.9 % after 60 minutes with the initial 5 mg•L −1 SMX and 0.2 g•L −1 catalyst in peroxymonosulfate (PMS) system. The results showed that the introduction of carbon stem from waste improved separation of photo-generated carriers and electron transfer capability, thus more photo-induced electrons could participate in reaction with PMS. Moreover, Cu(I) and Cu(II) in CBO-WC500 with Cu-Bi-spinel structure played a vital role in PMS activation. Led by electron transportation, reactive species ( 1 O 2 , •OH, SO 4 •- ) originated from PMS contributed to degradation of SMX, and degradation pathway of target pollutant was proposed based on analysis of intermediates. Removal efficiency of CBO-WC500 for SMX kept stable after several cycles’ utilization, and it also showed decent eliminating performance of mixed pollutants in different water matrix. This study has provided a potential way for resource reuse of adsorbed pollutant and realizing reutilization of spent adsorbent as photocatalyst with higher efficiency.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Liu Yang,Zihao Fan,Fujun Cui,Taolong Wu,Tingxu Fang,Yujie Guo,Li Tian,Bo Pang,Gaohong He,Xuemei Wu
Vanadium redox flow battery (VRFB) is promising large-scale energy storage technology for renewable energies, while the sluggish kinetics of vanadium redox reaction restricts the efficiency at high current density. Herein, the strategy of boosting V 2+ /V 3+ redox reaction by atomic Bi active sites decorated graphite felt electrode derived from bismuth-based metal−organic framework (Bi-MOF) is proposed. Bi-MOF, dispersing abundant Bi metal sites on porous carrier, helps the Bi atoms to form atomic active sites easily by coordinating with N through the nitrogen source mediated carbonization process. Porous nanobundles of atomic Bi catalyst uniformly bind to the graphite felt, exhibiting over 2 folds increase in specific surface area, higher V 2+ /V 3+ redox peak currents and reversibility, and one order of magnitude lower of charge-transfer resistance. The atomic Bi active sites decorated graphite felt negative electrode achieves high VRFB performance even with the vanadium ions heavily permeable Nafion membrane, showing 13.1 % higher energy efficiency at 200 mA cm –2 (80.2 % vs. 70.9%), 68.1% increase in electrolyte utilization comparing to the pristine graphite felt, and keeping stable during 1500 charge/discharge cycles. The performance is superior to the reported metal−organic frameworks (MOFs)-derived catalyst decorated electrodes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Weihua Qin,Mingye Ren,Yuwei Lu,Shaoxia Yang
The two-stage fixed-bed reactor significantly enhanced the phenol degradation efficiency in the heterogeneous Fenton-like reaction. The Cu/Bi-Ce/Al 2 O 3 catalyst, prepared by impregnation-precipitation method, exhibited favorable phenol removal, and the phenol degradation efficiency was ∼32.6 % higher in the two-stage fixed-bed reactor than that in the one-stage fixed-bed reactor under optimal parameters. Moreover, the Cu/Bi-Ce/Al 2 O 3 catalyst had excellent stability in the Fenton-like reaction due to the bismuth doping in the catalyst inhibiting the dissolution of copper ion. The Cu/Bi-Ce/Al 2 O 3 catalyst also displayed efficient purification ability for phenolic municipal sewage in the two-stage fixed-bed reactor. The redox cycles of Cu 2+ /Cu + and Ce 4+ /Ce 3+ were evidenced coexist to enhance the catalyst activity. The quenching experiments demonstrated that the generated singlet oxygen and superoxide anion free radicals dominated the degradation of phenol in the heterogeneous Fenton-like reaction over the Cu/Bi-Ce/Al 2 O 3 catalyst. This study may provide a novel heterogeneous Fenton-like/H 2 O 2 system for degrading organic pollutants in the fixed-bed reactor.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2025
·
IF 9.3
Ziming Zhang,Chen Ming,Qingfeng Song,Lei Wang,Hanbing Chen,Jincheng Liao,Chao Wang,Lidong Chen,Shengqiang Bai
Mg 3 (Sb,Bi) 2 -based Zintl compounds are rising stars with superior features of high thermoelectric (TE) performance, nontoxicity and low cost. However, the poor thermodynamic stability hinders its practical application. Here, we propose a design strategy of modulating the local chemical composition with grain boundary (GB) phase guided by computational phase equilibrium diagrams. By in-situ constructing ZrSb 1- x second phase in the GB regions of Mg 3 (Sb,Bi) 2 -based compounds, the migration of Mg is blocked and the Mg deletion is depressed. Benefit from these, the driving force of Mg diffusion from matrix to GB and Mg migration along GBs is weakened, resulting in an improved thermal stability without degradation of electrical transport properties. The fabricated 8-pair TE module using GB modulated n-type Mg 3.1 Sb 1.5 Bi 0.49 Te 0.01 and p-type Ge 0.89 Cu 0.06 Sb 0.08 Te presents an efficiency of 8.9 % under the temperature difference of 450 K and shows excellent durability in the thermal cycling test. This study provides an effective strategy to improve thermal stability by constructing GB phase, and proves the feasibility of the practical application for Mg 3 Sb 2 -based TE modules.
研究领域:
材料科学
·
热电材料
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固态化学
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计算材料学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Feihui Li,Jingkuo Zhou,Chunjuan Gao,Haixia Qiu,Yunlan Gong,Jinghan Gao,Yu Liu,Jianping Gao
In the present work, magnetically recyclable Bi/Bi 25 FeO 40 -C nanocomposites were synthesized through a one-step hydrothermal approach and then analyzed. The analysis results manifested that non-toxic and biodegradable sodium alginate takes a key role in successful preparation of Bi/Bi 25 FeO 40 -C. Sodium alginate can totally suppresses the formation of BiFeO 3 because it changes the alkalinity of the medium, and at the same time Fe precursor greatly restrains the reduction of Bi 3+ to Bi by sodium alginate, so the final product is Bi/Bi 25 FeO 40 with a small amount of Bi instead of Bi, BiFeO 3 or Bi/BiFeO 3 . Bi/Bi 25 FeO 40 -C showed enhanced photocatalytic activity in hydrogen generation as compared with pure Bi 25 FeO 40 due to the surface plasmonic resonance effect of Bi and electron conductivity of carbon, which promote electron-hole separation and light absorption of the Bi/Bi 25 FeO 40 -C, resulting in high photocatalytic efficiency. The Bi/Bi 25 FeO 40 -C even exhibited higher catalytic efficiency than noble metallic nanoparticles and good reusability in p-nitrophenol reduction. This work provides a green way to prepare Bi/Bi 25 FeO 40 -C for catalytic reactions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Fang Yuqi,Li Mingzhao,Wang Zi Jin,Liu Xinyu,Yao Shaowei
Metal Bi is considered as a potential anode material for sodium-ion batteries due to its high theoretical specific capacity and low reaction voltage. However, the volume change (244%) during discharge and charge process seriously affects the cycle stability performance. Under this background, the sheet-like structure bismuth based metal-organic framework (Bi-MOF) precursor is prepared by hydrothermal method, and Bi@C composite material is obtained after heat treatment. Due to the unique sheet-like structure and the addition of carbon, the Bi@C composite material can effectively alleviate the volume change during the discharge and charge process. According to the electrochemical performance test, Bi@C electrode material still has high and stable discharge specific capacity of 392.0 mAh g −1 after 1000 cycles at the current density of 0.5 A g −1 , and has excellent rate performance. This work provides an important reference for the development of Bi-based anode materials for sodium-ion battery.
研究领域:
材料科学
·
储能
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yongtao Xue,Zengyue Chen,Zhansheng Wu,Fei Tian,Bing Yu
Developing cost-effective photocatalysts with efficient electron hole separation efficiency and excellent light absorption performance for the remediation of organic pollutants from wastewater is highly desirable. Herein, a new Z-Scheme Bi/BiVO 4 -CdS heterojunction with leaf-like morphology has been successfully fabricated for the first time and its application as a photocatalyst for the degradation of tetracycline hydrochloride (TCH) has been explored. Compared with BiVO 4 and Bi/BiVO 4 , the as-prepared Bi/BiVO 4 -CdS exhibits improved light absorption capacity and electron-hole separation efficiency, and it has a superior performance of photocatalytic degradation of TCH. The degradation ratio of TCH by Bi/BiVO 4 -CdS based photocatalysis reaches 85.5% within 30 min. The rate constant of TCH degradation for Bi/BiVO 4 -CdS is 1.32 and 1.18 times of the BiVO 4 and Bi/BiVO 4 , respectively. In addition, Bi/BiVO 4 -CdS displays a high stability without obvious decay for its TCH degradation efficiency (<5%) during four recycles. The ESR characterization and reactive species trapping experiments indicates that the generated h + , •O 2 – , and •OH from Bi/BiVO 4 -CdS based photocatalysis are responsible for TCH degradation. Since several intermediates are identified by HPLC-MS, the pathways for Bi/BiVO 4 -CdS based photocatalytic degradation of TCH are proposed.
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
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.2
Shanghai Dong,Liying Wang,Weiyi Lou,Yunxin Shi,Lu Li,Zhenzhu Cao,Yongfeng Zhang,Junmin Sun
Nowadays, more and more regions of the earth are facing energy crisis and environmental pollution issues. Photocatalytic technology converts solar energy into chemical energy in an environmentally friendly way, which is considered as an effective method to solve such issues. In this work, a series of TiO2/Bi-MOFs (TiO2/Bismuth based metal-organic frameworks) composites were successfully prepared by a simple one-pot solvothermal method, and the photocatalytic activity of the composites was evaluated by photocatalytic degradation of rhodamine B (RhB) dye under visible light, and the catalytic activities of the samples were also investigated for methyl orange (MO), methylene blue (MB) and tetracycline (TC). The samples were characterized by using various analytical techniques. The composites exhibited better catalytic properties compared with the original single component, which was attributed to the high dispersion of TiO2 and the synergistic effect of efficient interfacial charge transfer between TiO2 and Bi-BTC (BTC: benzene-1,3,5-tricarboxylate, Scheme 1). Among the results, the photocatalytic degradation efficiencies of 25-T/B (T/B, TiO2/Bi-BTC: TiO2/bismuth homobenzotrizoate composites), 35-T/D (T/D, TiO2/Bi-BDC: TiO2/bismuth terephthalate composites) and 25-T/P (T/P, TiO2/Bi-BPDC: TiO2/bismuth biphenyldicarboxylate composites) for RhB were all 99% after 40 min of visible light irradiation. Furthermore, the degradation efficiency of 25-T/B for RhB could maintain high catalytic activity after five cycles, indicating the high stability of the catalyst. Overall, the materials presented in this work are a series of reusable, high catalytic activity and economical photocatalysts for water purification, and the effects of different ligands on the photocatalytic activity of TiO2/Bi-MOFs composites were investigated.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）