SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
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).
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高影响因子
IONICS
·
2020
·Vol. 26
·期 8
·3989-3995
·
IF 2.394
Zhang Shao-hui,Liu Bao-sheng,Ai Bao-Shan,Wang Zhen-bo
In this article, calcination at high temperature is used to dope bismuth into the lead lattice, forming a composite metal oxide. The impact of bismuth doping on the conductivity of the cathode material PbO 2 and the structural framework during charge-discharge cycles is investigated. SEM and XRD are used to understand the structure and morphology of the lead-bismuth composite oxide, while cyclic voltammetry and electrochemical impedance spectroscopy are used to determine its resistance and electrochemical properties. Battery cycling tests are performed to evaluate the impact of bismuth doping on the performance of the lead-acid cathode material, and it was found that discharge capacity at 2 C increased by 15% while retaining 90% of its initial capacity after 250 cycles.
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Journal of Tissue Viability
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2021
·
IF 2.932
Leilei Sun,Laihao Li,Yueqi Wang,Mingbo Li,Shumin Xu,Chengpeng Zhang
Aim of the study The aim of the study was to fabricate collagen-based composite dressings, evaluate the efficiency for wound healing and reveal the mechanism of promoting wound healing. Materials and methods An innovative bi-layered composite wound dressing was developed using two marine biomacromolecules (collagen and chitosan). Full-thickness skin defect model was performed to evaluate the wound healing activity in vivo . The levels of inflammatory cytokines including tumor necrosis factor alpha (TNF-α), interleukin (IL-1, IL-6, IL-8) and growth factors like transforming growth factor beta (TGF-β), vascular epidermal growth factor (VEGF) and basic fibroblast growth factor (bFGF) were quantified by ELISA assays. The total amount of collagen was quantified by hydroxyproline content. The proliferation and viability of fibroblast cells cultured on collagen sponges were determined by CCK-8 assay. Results The results of wound closure and histopathological analysis indicated that non-crosslinked collagen-based bi-layered composite dressing stimulated wound healing, accelerated re-epithelialization and accomplished wound healing within a time span of 28 days. The results of levels of inflammatory cytokines and growth factors showed that collagen-based composite dressings could reduce the inflammatory response and upregulate growth factors levels to accelerate the wound healing. The results of hydroxyproline content and CCK-8 assay indicated that collagen-based composite dressings could also promote collagen synthesis and fibroblasts viability and proliferation. Conclusion The non-crosslinked collagen-based bi-layered composite dressing could be applied for an efficient and ideal wound dressing. Therefore, the findings provided the essential theoretical basis for the potential of collagen-based composite dressing applied in wound healing fields.
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PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 1
·120-126
·
IF 1.063
Chen Jianfei,Chen Xiaoyu,Zhang Xing,Yuan Yao,Bi Ruyi,You Feifei,Wang Zumin,Yu Ranbo
BiVO 4 , a promising visible-light responding photocatalyst, has aroused extensive research interest because of inexpensiveness and excellent chemical stability. However, its main drawback is the poor photoinduced charge-transfer dynamics. Building nanostructures is an effective way to tackle this problem. Herein, we put forward a new method to prepare nanostructured BiVO 4 from Bi-based metal-organic frameworks[Bi-MOF(CAU-17)] precursor. The as-prepared material has a rod-like morphology inherited from the Bi-MOF sacrificial template and consists of small nanoparticle as building blocks. Compared with its counterparts prepared by conventional methods, MOF-derived nanostructured BiVO 4 shows better light absorption ability, narrower bandgap, and improved electrical conductivity as well as reduced recombination. Consequently, BiVO 4 nanostructure demonstrates high photocatalytic activity under visible light towards the degradation of methylene blue. Methylene blue can be degraded up to 90% within 30 min with a reaction rate constant of 0.058 min −1 . Moreover, the cycling stability of the catalyst is excellent to withstand unchanged degradation efficiency for at least 5 cycles.
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Acta Biomaterialia
·
2018
·
IF 6.383
Fenglin Hu,Kaimin Chen,Hong Xu,Hongchen Gu
An ideal nanomaterial for use in the bio-medical field should have a distinctive surface capable of effectively preventing nonspecific protein adsorption and identifying target bio-molecules. Recently, the short-chain zwitterion strategy has been suggested as a simple and novel approach to create outstanding anti-fouling surfaces. In this paper, the carboxyl end group of short-chain zwitterion-coated silica nanoparticles (SiO 2 -ZWS) was found to be difficult to functionalize via a conventional EDC/NHS strategy due to its rapid hydrolysis side-reactions. Hence, a series of bi-functionalized silica nanoparticles (SiO 2 -ZWS/COOH) were designed and prepared by controlling the molar ratio of 3-aminopropyltriethoxysilane (APTES) to short-chain zwitterionic organosiloxane (ZWS) in order to achieve above goal. The synthesized SiO 2 -ZWS/COOH had similar excellent anti-fouling properties compared with SiO 2 -ZWS, even in 50% fetal bovine serum characterized by DLS and turbidimetric titration. Subsequently, SiO 2 -ZWS/COOH 5/1 was chosen as a representative and then demonstrated higher detection signal intensity and more superior signal-to-noise ratios compare with the pure SiO 2 -COOH when they were used as a bio-carrier for chemiluminescence enzyme immunoassay (CLEIA). These unique bi-functionalized silica nanoparticles have many potential applications in the diagnostic and therapeutic fields. Statement of significance Reducing nonspecific protein adsorption and enhancing the immobilized efficiency of specific bio-probes are two of the most important issues for bio-carriers, particularly for a nanoparticle based bio-carrier. Herein, we designed and prepared a bi-functional nanoparticle with anti-fouling property and bio conjugation capacity for further bioassay by improving the short-chain zwitterionic modification strategy we have proposed previously. The heterogeneous surface of this nanoparticle showed effective anti-fouling properties both in model protein solutions and fetal bovine serum (FBS). The modified nanoparticles can also be successfully functionalized with a specific antibody for CLEIA assay with a prominent bio-detection performance even in 50% FBS. In this paper, we also investigated an unexpectedly fast hydrolysis behavior of NHS-activated carboxylic groups within the pure short-chain zwitterionic molecule that led to no protein binding in the short-chain zwitterion modified nanoparticle. Our findings pave a new way for the designing of high performance bio-carriers, demonstrating their strong potential as a robust platform for diagnosis and therapy.
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 16
·5801-5809
·
IF 5.7
Shuang Wu,Wen-Guang Li,Yu-Hua Huang,Xu-Dong Wang,Dai-Bin Kuang
Bi-based halide perovskites, with much lower toxicity than Pb-based perovskites, have triggered enormous interest in optoelectronic applications. However, most Bi-based perovskites have low-dimensional crystalline structures which may have potential negative effects on carrier transport. Herein, zero-dimensional (CHDA)BiI5·3H2O is transformed into two-dimensional double perovskite (CHDA)2CuBiI8·0.5H2O through Cu+ introduction engineering, which shows increased orbital overlap and improved electronic band structure dispersion compared with the former. Notably, a 104-fold enhancement in photoresponse on–off ratio is observed for the (CHDA)2CuBiI8·0.5H2O SC photodetector. This advancement not only enhances our understanding of the intricate relationship between crystal structure and charge transport behavior in Bi-based perovskites but also paves the way for highly efficient and environmentally friendly optoelectronic device development.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Tiantian Zhou,Ju Liu,Huanhui Zhan,Ping Wang,Kefan Chao,Muhua Chen,Junjie Zheng,Bo Fu
Herein, through in-situ growing BiVO 4 nanosheets on CAU-17 (Bi-based metal-organic framework) with a hydrothermal method , a BiVO 4 /CAU-17 Z-scheme heterojunction photocatalyst is fabricated. The composite manifest that the BiVO 4 is well dispersed on CAU-17 while CAU-17 surface transforms into a well-defined sheet-like morphology. As a result of the construction of Z-scheme heterojunction , in contrast to pure BiVO 4 and CAU-17, composites have excellent photodegradation ability for Rhodamine B (RhB) and Congo Red (CR), and achieve synergistic removal of pollutants in the RhB/CR binary system, indicating it has great potential in the treatment of dye wastewater. At the same time, it still maintains outstanding photocatalytic performance after five cycles of testing, demonstrating superior reusability and durability.
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Journal of Advanced Ceramics
·
2017
·Vol. 7
·期 1
·1-4
·
IF 1.198
Zheng Huiping,Nian Hongqiang,Xia Jinfeng,Zhou Guohong,Jiang Danyu,Li Qiang
To quantify the oxygen content in molten salts, we examined the performance of an yttria-stabilized zirconia solid electrolyte oxygen sensor with a Bi/Bi 2 O 3 reference electrode, focusing on its output accuracy. When the above sensor was tested in a flow of gas with known oxygen partial pressure, \(p_{O_2}\) , a linear relationship between \(lgp_{O_2}\) and the electromotive force (EMF) was observed, and the correlation slope exhibited a positive deviation from Nernstian behavior. EMF measurements performed in molten NaCl–KCl indicated that the oxygen content of this salt mixture increased with increasing oxygen partial pressure in the covering gas, in agreement with Henry’s law. Moreover, the EMF exhibited a linear decrease with increasing melt temperature of molten NaCl–KCl, in agreement with the theoretical model. Finally, a relationship between the structure of molten NaCl–KCl and its oxygen diffusion behavior was established. As a result, the developed sensor was demonstrated to be well suited for determining the oxygen content of molten salts.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jinwang Li,Jianglin Tu,Zhefei Pan,Liang An,Rong Chen
The development of efficient electrocatalysts for sustainable ammonia synthesis via the nitrogen reduction reaction remains a critical challenge due to the inherent stability of N ≡ N bonds and competing hydrogen evolution reaction. Herein, we present a bimetallic Bi-Sn catalyst synthesized through galvanic replacement and electrodeposition, demonstrating enhanced nitrogen reduction performance under ambient conditions. The optimized Bi-Sn catalyst achieves an ammonia yield of 17.09 μg h −1 ·mg cat −1 with a Faradaic efficiency of 5.37 % at −0.4 V vs. reversible hydrogen electrode, representing an obvious improvement over pristine Bi. Comprehensive characterization reveals that Sn nanoparticles are uniformly decorated on the Bi surfaces, increasing the electrochemical surface area while enhancing electrode conductivity. Theoretical calculations elucidate the synergistic mechanism: Sn modulates the Bi 6p band center, reducing the energy barrier for the rate-determining step of ∗N 2 → ∗NNH by 16.9 % (ΔG = 1.72 eV vs. 2.07 eV for Bi) and enhancing nitrogen adsorption (0.20 eV vs. 0.28 eV). This work establishes an integrated strategy of structural engineering and electronic modulation for designing bimetallic catalysts, advancing sustainable ammonia synthesis.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mingliang Sun,Ao Sun,Hongwei Zhu,Ruyu Zhang,Xiaowei Jia,Yan Xing
Photocatalytic nitrogen fixation provides a sustainable alternative to the energy-intensive Haber–Bosch process, yet its efficiency is limited by poor N 2 solubility, weak adsorption, rapid charge recombination, and competing hydrogen evolution. reaction (HER). In this work, we introduce a synergistic interfacial strategy integrating Schottky junction construction and hydrophobic surface engineering to enhance photocatalytic N 2 fixation. Bi nanoparticles are in-situ anchored onto Bi 3 TiNbO 9 (BTNO) to construct Bi/BTNO Schottky junctions, facilitating directional electron transfer and accumulation at Bi active sites. Concurrently, surface hydrophobicity of Bi/BTNO is precisely tailored via 1-dodecanethiol modification, promoting N 2 enrichment at the reaction interface while effectively suppressing HER. The optimized 2C 12 S-1 % Bi/BTNO catalyst achieves an exceptional ammonia production rate of 25.83 μmol g -1 h −1 in pure water without sacrificial agents, outperforming pristine BTNO by 6.96-fold and unmodified Bi/BTNO by 2.85-fold. Photoelectrochemical measurements and in situ FTIR spectroscopy verify enhanced charge separation and an associative distal pathway for N 2 reduction. This work underscores the importance of interface microenvironment design in addressing kinetic and selectivity limitations, offering a versatile platform for efficient solar-driven nitrogen fixation.
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高影响因子
NORDIC PULP & PAPER RESEARCH JOURNAL
·
2022
·Vol. 37
·期 4
·636-648
·
IF 1.595
Yunfei Liao,Huiming Fan,Yongli Zhang,Hongyan Mou,Fengyu Li,Ziyin Zhou,Jianan Liu
PAAs can be further functionalized (hydroxylation and alkoxylation) by side chain substitution. In this study, we synthesized a SiPAAOH containing hydroxyl and siloxane groups based on the Aza-Michael addition reaction and applied it for reinforcement of aged paper. The results showed that the optimum conditions of SiPAAOH synthesis were as follows: the monomer molar ratio of APTES to EtA was 0.7:0.3, the solvent system for SiPAAOH reinforced aged paper was ethanol/water = 1:5 (v/v). The alkaline SiPAAOH could increase the pH of paper to 7.68, and to improve the amount of alkaline reserve to 200 mmol/kg. The whiteness and color difference of the treated paper were not significantly different from those of the untreated paper, and the mechanical properties of the paper were obviously improved. The results of contact angle and thermogravimetry showed that the SiPAAOH-treated paper was hydrophobicity and high temperature resistance.
研究领域:
材料科学
·
纸张保护
·
化学工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Deyu Bao,Qiang Sun,Linsen Huang,Jie Chen,Jun Tang,Dali Zhou,Min Hong,Lei Yang,Zhi-Gang Chen
Tremendous efforts have been focusing on the improvement of p-type (Bi, Sb) 2 Te 3 -based thermoelectric materials for commercial applications. In this study, we achieve versatile interface engineering through a surface decoration of Bi 0.5 Sb 1.5 Te 3 by amorphous Sb 2 S 3 combining with spark plasma sintering, which introduces semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces and dopes S into Bi 0.5 Sb 1.5 Te 3 . Semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces strongly scatter phonons and lower energy carriers, leading to decreased thermal conductivity and increased Seebeck coefficient, while the electrical conductivity is not sacrificed due to the compromise of the slightly reduced carrier mobility by interfacial scattering and the increased carrier concentration by S doping. Benefited from the decoupled thermoelectric properties, a significantly enhanced power factor of 3345.40 μW m −1 K −2 and a low thermal conductivity of 0.78 W m −1 K −1 is obtained in Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 , leading to a high peak zT of ∼ 1.31 at 330 K, which shows a 54% enhancement compared with pristine Bi 0.5 Sb 1.5 Te 3 . Moreover, a conversion efficiency of ∼ 7.6% can be predicted in a single leg Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 -based module under a cold side temperature of 300 K and hot side temperature of 480 K. This study paves a facile amorphous Sb 2 S 3 induced interface engineering strategy for the development of high performance (Bi,Sb) 2 Te 3 -based thermoelectric materials.
研究领域:
材料科学
·
能源科学
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