JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Ziwei Dong,Mengting Di,Lei Hu,Li Gao,Xiaoming Yan,Xuehua Ruan,Xuemei Wu,Gaohong He
A novel hydrophilic/hydrophobic bi-comb-shaped amphoteric membrane was for the first time designed by the one-pot reactions of PBI with bromohexane and 1,3-propanesultone. The sulfonic acid chain promotes the formation of amphoteric ion clusters, while the alkyl side chain enhances the packing of hydrophobic segments. This unique structure design optimizes the segregated microphase morphology of the membrane, which is proved by TEM. Compared to the membrane without alkyl side chain, the bi-comb-shaped membrane shows a lowered area resistance (0.58 vs. 0.96 Ω cm 2 ) as well as a reduced swelling ratio (11.7% vs. 14.3%). As a result, the cell with the bi-comb-shaped membrane exhibits improved voltage efficiency, thus achieving increased energy efficiency. In addition, the membrane of this structure occupies excellent cycle stability. The cell efficiencies maintain almost stable for 250 cycles, and the chemical structure has no change after immersing in the electrolyte solution for 28 days.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 5
·3104-3118
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IF 3.094
Xiang Lv,Zhengyi Zhang,Zhiqiang Cao,Wei Jiang,Lifen Shi,Xiaojuan Zhao,Liyun Ma,Tianhe Wang,Shou Peng
A stable and translucent Bi@Bi 4 Ti 3 O 12 /TiO 2 film was fabricated on conventional glass substrates for the first time. The film exhibited a good photocatalytic performance and efficient self-cleaning capability against organic dyes under full spectral irradiation and visible light irradiation. Bi 4 Ti 3 O 12 /TiO 2 film was first prepared on a glass substrate with colloidal silica as a high temperature binder, followed by implantation of nanoscale Bi in it by an in-situ partially reduction of Bi 4 Ti 3 O 12 to generate Bi@Bi 4 Ti 3 O 12 /TiO 2 films. The improved photocatalytic ability is probably attributed to the surface plasmon resonance of Bi atom as well as the enhanced electron transfer efficiency and synergistic effect of Bi 4 Ti 3 O 12 and TiO 2 . According to trapping experiments, hydroxyl radicals (OH) were active species in the photocatalytic degradation of dyes under full spectral light irradiation and possible photocatalytic mechanism was proposed. The film prepared in this work may well have potential practical applications in many aspects, such as cleansing treatments for high building external decorative panels and also systematic characterization of the film suggests that the in-situ reduction is an effective and simple way to produce nanoscale Bi@Bi 4 Ti 3 O 12 .
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Yuan Zhao,Qingshuang Wang,Dongming Yin,Shouliang Li,Chunli Wang,Long Liang,Shaolei Zhao,Chunmin Zhang,Limin Wang,Yong Cheng
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst ( x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3 . The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3 . At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage .
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CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Liqing Wu,Qing Liang,Jiayi Zhao,Juan Zhu,Hongnan Jia,Wei Zhang,Ping Cai,Wei Luo
Ruthenium oxide-based electrocatalysts have been regarded as promising alternatives to the state-of-the-art Iridium oxide (IrO 2 ) towards acidic oxygen evolution reaction (OER). However, their practical applications of proton exchange membrane water electrolyzer (PEMWE) are severely limited by the lack of efficient strategy to balance the seesaw relation between stability and activity of ruthenium oxide (RuO 2 )-based catalysts. Herein, we report that both the activity and stability of RuO 2 can be significantly boosted though bismuth (Bi) doping. We find that the introduction of Bi can increase the initial valance state of Ru in Bi 0.15 Ru 0.85 O 2 , which can promote the activation of Ru active sites, and facilitate the reaction kinetics of acidic OER. Besides, the presence of Bi can strengthen the electron interaction to maintain the structure stability and improve the electrocatalytic performance by reducing the energy barriers and avoiding the overoxidation of active species. The obtained Bi 0.15 Ru 0.85 O 2 catalyst shows a low overpotential of 200.0 mV to reach a current density of 10 mA cm –2 under acidic media, and a long-term stability for over 100 hours. Our work provides an important inspiration to rational design RuO 2 -based electrocatalysts with high activity and durability toward acidic OER.
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Nanomaterials
·
2023
·Vol. 13
·期 17
·2408
·
IF 5.3
Shijie Wang,Dongxue Song,Lijun Liao,Bo Wang,Zhenzi Li,Mingxia Li,Wei Zhou
Doping engineering of metallic elements is of significant importance in photocatalysis, especially in the transition element range where metals possess empty ‘d’ orbitals that readily absorb electrons and increase carrier concentration. The doping of Mn ions produces dipole interactions that change the local structure of BiOCl, thus increasing the specific surface area of BiOCl and the number of mesoporous distributions, and providing a broader platform and richer surface active sites for catalytic reactions. The combination of Mn doping and metal Bi reduces the forbidden bandwidth of BiOCl, thereby increasing the absorption in the light region and strengthening the photocatalytic ability of BiOCl. The degradation of norfloxacin by Bi/Mn-doped BiOCl can reach 86.5% within 10 min. The synergistic effect of Mn doping and Bi metal can change the internal energy level and increase light absorption simultaneously. The photocatalytic system created by such a dual-technology combination has promising applications in environmental remediation.Keywords:photocatalysis;BiOCl;manganese doping;self-assembly
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Xuelian Liu,Min Ye,Fangyuan Lin,Ling-ou Yang,Jie Lin,Yaqi Jiang,Dongjie Tian,Xi Chen
Ammonia (NH 3 ) is a common pollutant in water and an important indicator of environmental pollution. Its determination is of great significance to environmental protection. We synthesized ligand-free Cs 2 AgInCl 6 :Bi at room temperature to establish a low toxicity, rapid, and simple fluorescence assay for the selective determination of NH 3 in water. Studies have shown that there is a good linear relationship with the concentration of NH 3 in the range of 1.00 ∼ 20.00 mg L -1 and the determination limit is 0.40 mg L -1 . The selectivity for NH 3 is higher than other substances may exist in the water (eg. Na + , SO 4 2- ). Subsequently, X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, time-resolved fluorescence spectroscopy and ultraviolet absorption spectra were used to investigate the possible mechanism of NH 3 reaction with Cs 2 AgInCl 6 :Bi. The water samples of lakes and rivers were analyzed by the proposed method and indophenolblue method, the results shown that there is no significant difference between the two methods. The reliable results (0.1%< RSD < 4.1%) and the satisfactory recovery (99.0%∼102.5%) were obtained by direct determination method and mark recovery method. Therefore, the simple, rapid and low-toxicity fluorescence method established in this work provides a promising approach for NH 3 analysis in environmental water.
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高影响因子
Nanoscale
·
2019
·Vol. 11
·期 12
·5499-5505
·
IF 6.97
Hongjing Wang,Yinghao Li,Dandan Yang,Xiaoqian Qian,Ziqiang Wang,You Xu,Xiaonian Li,Hairong Xue,Liang Wang
Electrochemical reduction of N2 represents a very attractive approach for sustainable NH3 production at environmental temperature and pressure. The design of highly branched Pd-based nanoarchitectonics is very important for the electrocatalytic N2 reduction reaction (NRR). Herein, we propose a very simple synthetic method for direct fabrication of unique bi-metallic PdRu nanorod assemblies (PdRu NRAs) with high yield in an aqueous solution. Owing to their branched shape together with bi-metallic compositions, the self-supported PdRu NRAs assembled with staggered nanorods show high catalytic activity and superior durability for the NRR. The presented direct synthetic strategy is very valuable for the design of active branched metallic catalysts for the NRR.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
·
IF 3.131
Yumei Peng,Lixia Qin,Jiefei Liu,Shi-Zhao Kang,Guodong Li,Xiangqing Li
Here, by a simple one-step in situ chemical reduction method, the Ag x Cu y alloy was tailored on the surface of mesoporous TiO 2 (M-TiO 2 ), therefore, a series of bi-functional mesoporous TiO 2 nanohybrids (M-TiO 2 /Ag x Cu y ) for both surface enhanced Raman scattering (SERS) detection and photocatalytic degradation of ampicillin (AMP) were achieved. The composition and structure of the nanohybrids were well characterized using XRD, TEM, XPS and HRTEM-EDS measurements. Results indicated that Ag x Cu y alloy was mainly attached around the pores of M-TiO 2 which may generate more active sites than nonporous P25−Ag−Cu. Thus, the M-TiO 2 /Ag x Cu y nanohybrids could be used as efficient SERS substrates to sensitively monitor the AMP in water with lower detection limit (˜ 1 ppt) than P25−Ag−Cu. Besides, the M-TiO 2 /Ag 3 Cu 1 nanohybrid also showed higher photocatalytic activities for the degradation of AMP under UV irradiation over the M-TiO 2 /Ag, the M-TiO 2 /Cu and the P25−Ag−Cu. This work provided a simple and effective approach to synthesize bi-functional nanohybrids for detection and degradation of organic contaminants in wastewater.
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高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Yan Cheng,Navid Hussain Shah,Jian Yang,Kai Zhang,Yanyan Cui,Yaling Wang
A multicomponent Bi-based Z-scheme photocatalyst, BISB, was developed through a hydrothermal method. In this sample, two semiconducting nanostructures, BiOI and Bi2S3, were linked together with the metal Bi nanoparticle. As compared with BiOI (BI) and heterojunction BiOI/Bi2S3 (BIS) samples, the BISB had optimal Rhodamine B (RhB) photodecomposition performance. High efficiency separation of photoexcited electrons and holes, decreased band gap energy, extended specific surface area, and promotional redox potential were key factors for enhancing the photocatalytic activity of the prepared sample. The photoexcited holes were the key active radicals during the RhB photodecomposition process over the BISB catalyst, while ·O2¯ was also involved to a smaller extent. Additionally, the photocatalyst demonstrated excellent reusability and stability during the photoreaction process, suggesting that the BISB sample could be a candidate for water purification applications.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Fang Li,Wei Zhao,Dennis Y.C. Leung
Photoelectrocatalytic hydrogen production is a clean and sustainable way to combat energy crises and environmental issues. The performance of BiVO 4 which acts as a promising photoanode could be effectively enhanced by loading with Bi nanoparticles. In this study, a viable method to fabricate Bi/BiVO 4 electrode was proposed to enhance hydrogen production through a photoelectrocatalytic reaction. The results indicated that Bi nanoparticles loaded under optimal condition could obviously increase the photocurrent density of the BiVO 4 electrode from 0.9 mA cm −2 to 2.0 mA cm −2 under visible light illumination. Furthermore, the photoelectrochemical hydrogen production efficiency could have a 2.5-fold improvement with the addition of 20 ppm phenol. The possible mechanism of the enhanced performance and the function of phenol in the overall reaction was discussed.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Fengyu Kong,Wei Ning,Anding Wang,Yan Liu,Mingliang Tian
Bi is a semimetal with unusual and attractive electronic properties. However, synthesis of nanoscale 0-2D Bi single crystal with good dispersity and quality without surfactants and substrates is still a challenge. In this paper, a novel, simple and low-cost solvothermal method for synthesis of 0-2D nanoscale Bi at mild conditions and without a surfactant/substrate is reported. By using Bi(NO 3 ) 3 ·5H 2 O or NaBiO 3 ·2H 2 O as Bi sources and environmental friendly C 3 H 8 O 3 as solvent, we synthesized nanospheres , nanowires and nanoribbons characterized with monodispersity, high purity and crystallinity. The growth mechanism of the 0-2D nanostructure was discussed. It is found that the Bi source, concentration and solvent significantly influences the morphology and size. Single crystal free-standing nanoribbon has large magnetoresistance up to 540% at 100 K. This novel approach can be applied in synthesis of nanostructured Bi single crystals and the large-scale fabrication of some other nanostructured semimetals.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2017
·Vol. 33
·期 6
·929-933
·
IF 1.024
Bu Luxia,Liu Daying,Wei Zhen,Ma Zhanlin
The preparation and characterization of homogeneous and colorless ionic liquid analogs(ILAs) containing choline chloride(ChCl), malonic acid and bismuth chloride were investigated. The structure of the above mixture was preliminarily analyzed, and then the physicochemical properties including viscosity, conductivity and density were investigated as functions of temperature and composition. Additionally, the thermal stability of the ILAs and the electrochemical behavior of Bi3+ ions in the medium were studied. Structure analysis reveals that the synthesis of deep eutectic solvents(DESs) is closely related to the formation of hydrogen bonds between malonic acid and ChCl, with their viscosity, conductivity and density being greatly dependent on the temperature and composition. Thermogravimetric analysis demonstrates that the ILAs are very stable between room temperature and 398.15 K. And the electrochemical experiments indicate that the bismuth films can be successfully deposited from this ILAs and the deposition mechanism of bismuth is a rather irreversible process. The surface morphology of bismuth films deposited on Cu substrates was very compact and smooth. Thus, ChCl-malonic acid DESs were shown to be a good alternative to aqueous solvents for various deposition-related applications.
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危险品化学品经营许可证（带存储）