ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yan Nie,Tianwei Chen,Mengqi Tian,Yapeng Zhang,Xiaorong Ruan,Ibrahem O. Baibars,Donghai Wei,Chuan Zhao,Guanhua Zhang
Efficient gas bubble management is critical for enhancing the efficiency of alkaline water electrolysis, where adherent bubbles cause large overpotentials and unstable current densities. While optimizing the electrode structure has proven effective in promoting bubble detachment and improving reaction kinetics, achieving an ordered structure with a clear structure–performance relationship still remains challenging. Herein, a superaerophobic ordered 3D honeycomb Ni micromesh (3D HNM) integrated with NiCoP catalysts (3D HNM@NCP) is developed to address this challenge. By photolithography and the electrodeposition process, the hierarchical electrode is composed of a conductive Ni micromesh and Ni nanopyramids, which produces a discontinuous triple-phase contact line to minimize bubble adhesion. Operando high-speed imaging and finite element simulations reveal that the superaerophobic surface reduces bubble detachment size to ∼100 μm (compared with 150 μm for flat electrodes) and thus accelerates bubble release. As a result, the 3D HNM@NCP electrode exhibits an overpotential of 134 mV and demonstrates outstanding durability for over 60 h at 100 mA cm–2 for the hydrogen evolution reaction. The overall water electrolysis enables over 24 h of chronopotentiometric steps at current densities up to 400 mA cm–2. This work demonstrates an effective method to promote gas bubble removal with a 3D ordered structure with superaerophobic property for alkaline water electrolysis.
研究领域:
电化学
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可再生能源
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材料科学
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氢气生产
·
水电解
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DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2021
·
IF 5.03
Han Hu,Ying Tian,Jinggang Wang,Ruoyu Zhang,Jin Zhu
Aliphatic–aromatic copolyesters are indispensable in degradable plastics, but their properties are limited by low strength and modulus, and slow degradation rates in natural environment. Herein, we report a novel molecular design method to prepare poly(butylene adipate–co–diglycolate–co–terephthalate)(PBADT) copolyesters. In detail, the aromatic unit is fixed at 50% molar content of butylene terephthalate (BT) units, while the aliphatic units are consisted of butylene adipate (BA) and butylene diglycolate (BD) units. The PBADT copolyesters have melting temperatures higher than 130 °C and manifest rapid crystallization, high elastic modulus (>129 MPa) and satisfied ductile tensile behavior (>770%). Their gas barrier performance and hydrophilicity all increase with increasing BD units. Compared with PBAT, faster hydrolysis and seawater degradation are observed, which is explained by the more hydrophilic structure of diglycolate. This work provides insights and direction for the development of high-performance yet environmentally degradable alternatives to conventional biodegradable aliphatic–aromatic polyesters.
研究领域:
材料科学
·
环境科学
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高影响因子
Pharmaceutics
·
2024
·Vol. 16
·期 6
·833
·
IF 4.9
Zhiran Chen,Xiaoxiang Zhou,Bo Wu,Han Tang,Wei Wei,Daoming Zhu,Yi Ding,Longyun Chen
The inhibition of the immune response in the tumor microenvironment by therapy regimens can impede the eradication of tumors, potentially resulting in tumor metastasis. As a non-invasive therapeutic method, radiotherapy is utilized for tumor ablation. In this study, we aimed to improve the therapeutic impact of radiotherapy and trigger an immune response by formulating a benzothiazole sulfinate (BTS)-loaded fusion liposome (BFL) nanoplatform, which was then combined with radiotherapy for anti-cancer treatment. The platelet cell membrane, equipped with distinctive surface receptors, enables BFL to effectively target tumors while evading the immune system and adhering to tumor cells. This facilitates BFL’s engulfment by cancer cells, subsequently releasing BTS within them. Following the release, the BTS produces sulfur dioxide (SO2) for gas therapy, initiating the oxidation of intracellular glutathione (GSH). This process demonstrates efficacy in repairing damage post-radiotherapy, thereby achieving effective radiosensitization. It was revealed that an immune response was triggered following the enhanced radiosensitization facilitated by BFL. This approach facilitated the maturation of dendritic cell (DC) within lymph nodes, leading to an increase in the proportion of T cells in distant tumors. This resulted in significant eradication of primary tumors and inhibition of growth in distant tumors. In summary, the integration of personalized BFL with radiotherapy shows potential in enhancing both tumor immune response and the elimination of tumors, including metastasis.
研究领域:
癌症治疗
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纳米技术
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免疫疗法
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放射治疗
·
药学
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DOI
PubMed
高影响因子
AICHE JOURNAL
·
2020
·Vol. 66
·期 10
·e16543
·
IF 3.519
Shanshan He,Xu Jiang,Songwei Li,Feitian Ran,Jun Long,Lu Shao
The high fractional free volume (FFV) endowed polymers of intrinsic microporosity (PIMs) with high gas permeability but low selectivity. Herein, an intermediate temperature range was deliberately utilized to tune PIM-1 membrane microstructure in nitrogen atmosphere to enhance gas separation performance. During intermediate thermal manipulation, the synergistic effects of thermal-induced cross-linking and decomposition on PIM-1 membranes have optimized the micropores for significantly increasing membrane molecular-sieving ability with the boosted selectivity of 350 (H 2 /N 2 ), 1,472 (H 2 /CH 4 ), 3,774 (H 2 /C 3 H 8 ), and 197 (CO 2 /CH 4 ) respectively, with the H 2 permeability of 234 Barrer, correspondingly, surpassing the “Robeson's Upper Bound”. The facile strategy simultaneously utilizing the thermal-induced cross-linking and decomposition, might provide a new platform to develop the high-performance membranes for highly-efficient hydrogen purification and CO 2 separations.
研究领域:
材料科学
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高分子科学
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化学工程
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膜技术
·
气体分离
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2013
·
IF 4.612
Tao Sun,Liu Tian,Jianmei Li,Meiling Qi,Ruonong Fu,Xuebin Huang
Dithienyl benzothiadiazole (TBT) derivatives are characteristic of specific molecular structures and excellent thermal stability, offering the great potential for their use as stationary phases for capillary gas chromatography (GC). However, no related publications are available to date. Here we first report the exploration of two TBT derivatives, namely, 4,7-bis(5-dodecylthiophen-2-yl) benzothiadiazole (TBT-C12, a new derivative), and 4,7-di(thiophen-2-yl) benzothiadiazole (TBT), for the purpose. First, TBT-C12 and TBT were synthesized and statically coated onto capillary columns. Both of the as-prepared columns were characterized as nonpolar nature by the determined McReynolds constants. The results showed that both TBT-C12 and TBT columns achieved excellent separations for n -alkanes, esters and polycyclic aromatic hydrocarbons (PAHs), and the TBT-C12 column exhibited better thermal stability (up to 280 °C) than the TBT column. Moreover, a comparative study between the TBT-type columns and a commercial column was also made, suggesting the better selectivity of the TBT-type stationary phases toward n -alkanes and PAHs than that of the commercial one. Additionally, thermodynamic parameters suggested that the retention behaviors of n -alkanes and PAHs on the TBT-C12 column was mainly controlled by entropy change (Δ S ). In conclusion, this work demonstrates the excellent chromatographic performance of TBT derivatives as a new type of GC stationary phases and their potential in separation science .
研究领域:
分析化学
·
色谱技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Wei Chen,Fanfei Deng,Min Xu,Jun Wang,Zhenbo Wei,Yongwei Wang
Graphene oxide and cuprous oxide ( G O/Cu 2 O) nanocomposite based quartz crystal microbalance (QCM) gas sensor via layer-by-layer self-assembly (LBLSA) method was developed for trimethylamine (TMA) gas sensing under concentrations of 5 ppm. The sensor response increased linearly with the concentration of TMA, which was consistent with the Saurebrey equation. It also had good sensitivity, reversibility, selectivity and stability in 60 days. The detection limit of 230 ppb was achieved which was the lowest detection levels among recently reported QCM gas sensor towards TMA under room temperature. The sensing mechanism of GO/Cu 2 O nanocomposite based QCM gas sensor towards TMA under low concentrations was proposed as follows: (1) an adsorption-desorption process via hydrogen bonding between the GO surface carboxyl groups and TMA molecules; (2) enhanced physical adsorption of TMA gas molecules via LBLSA method due to enlarged surface area and p-n junction of GO/Cu 2 O nanocomposite. This GO/Cu 2 O nanocomposite based QCM gas sensor may provide a foundation for the TMA gas sensors development in areas of environmental protection and food safety.
研究领域:
材料科学
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环境科学
·
食品安全
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Zhiguang Zhang,Xiaolong Ren,Guolong Huo,Shuanyan Kang,Zhenggong Wang,Nanwen Li
Fluorinated polyimides with biphenyl structure and –CF 3 with rigid chain structure exhibit great potential in membrane-based gas separation. However, the comprehensive separation performance of this type polyimides is not competitive as a gas separation material. Structure regulation is of great significance to improve the separation performance of polymer membrane. Few studies systematically investigated structure-property relationships in fluorinated polyimide structure. In this study, carboxylic groups are introduced into a fluorinated polyimide(6FDA-TFMB) via copolymerization with DABA diamine monomer . The hydrogen bond between –CF 3 group in TFMB and –COOH group in DABA is proposed to enhance chain segment rigidity and optimize polymer chain arrangement. WAXD results and FFV data indicate that inter-chain cavity of fluorinated polyimide could be finely tuned by adjusting molar ratio of TFMB and DABA in the copolyimide. The resulted copolyimide membranes thus demonstrate tunable gas permeation properties. Gas permeability of 6FDA-TFMB/DABA firstly increases and then decreases, and ideal gas selectivity continuously increases with increasing DABA molar ratio. Among the polyimides, 6FDA-TFMB/DABA(6:4) membrane demonstrated superior separation performance, e.g. CO 2 permeability of 135.6 Barrer and CO 2 /CH 4 ideal selectivity of 31.6, surpassing the commercial cellulose acetate and Matrimid membrane. Attributed to the optimized interchain interaction, the 6FDA-TFMB/DABA (6:4) membrane displays an optimized CO 2 plasticization resistance and physical aging in comparison with 6FDA-TFMB membranes. This study provides a guideline for controlling and optimize the performance of biphenyl fluorinated polyimide gas separation membrane .
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Jiguang Huang,Haiping Chen,Jihao Yang,Ziwei Du,Heng Zhang,Zhaohao Li
Transport membrane condenser can efficiently recover water and heat from wet flue gas . Ceramic membrane is the heat and mass transfer medium in the process. However, the relationship between membrane property and the recovery performance is only partially reported based on current research state. This work focuses on the effects of permeability, material, and ceramic particle size of membrane on the water and heat recovery. Membranes were prepared from three different sizes of coal fly ash and an alumina powder. Water and heat recovery performances of the membranes are experimentally compared. Results indicate that increasing membrane permeability improves water and heat recovery because the resistance of heat and mass transfer is reduced. The alumina membrane performs 3–10% more water recovery than the coal fly ash-based membrane while thermal conductivity of the alumina membrane was 11.5 times that of the coal fly ash-based membrane. Increasing ceramic particle size shows two opposite effects on the water and heat recovery, promotion because of the permeability rising, and undermine because of the thermal conductivity reduction. Low-cost membranes with high permeability and high thermal conductivity are recommended in transport membrane condenser application.
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2023
·
IF 1.2
Gulgina Mamtmin,Patima Nizamidin,Reyanggu Abula,Abliz Yimit
Composite optical waveguide sensors show immense potential for the trace-level detection of harmful gases owing to their high sensitivity. Herein, we prepared a highly sensitive ZnO film/K + ion-exchanged composite optical waveguide sensor by fixing a thin ZnO film layer on the surface of a K + ion-exchanged glass optical waveguide. To study the influence of the preparation method on the gas sensitivity of the sensing element, 5,10,15,20-tetrakis-(4-methoxyphenyl)porphyrin was used as a sensing layer on the surface of the ZnO film and fixed via the spin-coating and immersion methods. The gas sensitivity of the sensors prepared by the two methods was comparatively studied. The sensor elements prepared by the immersion method showed higher sensitivity than those prepared by the spin-coating method. Furthermore, the reasons for the difference in the gas sensitivity are discussed in detail. The experimental results show that the as-prepared sensor can detect ppt levels of H 2 S and SO 2 gases and has potential application in the detection of trace levels of sulfide gases in the environment and in industrial production.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuchao Chen,Yubin Wang,Zifei Yan,Jian Deng,Guangsheng Luo
Efficient selective removal of H 2 S over CO 2 is the critical absorption process for the gas desulfurization in the petrochemical and refining industries. In this work, we tried to achieve high-selective removal of H 2 S from a mixed gas with CO 2 using a nonaqueous methyldiethanolamine solution in a membrane gas–liquid microdispersion microreactor. The influence of structural parameters and operation parameters on the removal efficiency of H 2 S and CO 2 were systematically investigated. In addition, the mechanism of selective absorption H 2 S over CO 2 was explained in detail. Furthermore, the selective absorption performance of the membrane microdispersion microreactor was compared with other devices. The results showed that the H 2 S removal efficiency and selective factor could be up to 99.4 % and 16.6, respectively. The selectivity factor of H 2 S to CO 2 in the membrane microdispersion microreactor is higher than that of most of reported devices. This work provides a promising selective absorption H 2 S device and technology for the process intensification of gas desulfurization.
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高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Ke Xu,Ziwang Kan,Feiyu Zhang,Yuan Qu,Siqi Li,Song Liu
Ethanol gas sensing has been attracting more and more attention due to its significance, such as human health care, and detection in drunk driving. However, the low sensitivity, the high limit of detection and the long response time restrain its further application development. Here we report SnO 2 nanomaterials with well-controlled hollow multi-shelled structure as an efficient ethanol gas sensing. The shell number was tuned by the concentration of the precursor. Among, the double-shell SnO 2 nanomaterials (SnO 2 -D) exhibited the best selectivity towards ethanol, reaching 22.5 of R g /R a ratio. Moreover, the 1 ppm ethanol was even detected, the R g /R a ratio being 1.37. The response time to 100 ppm ethanol was only 2 s. Furthermore, the SnO 2 -D maintained the same performance after 21 days of continuous response to 100 ppm ethanol. Based on experiments and in situ FTIR, the outstanding sensing performance is attributed to the excellent spatial confinement and large active surface of the double-shell that combine the enhanced gas adsorption, and increase conductive electrons.
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DOI
高影响因子
APPLIED ENERGY
·
2023
·
IF 11.2
Beibei Yan,Songjiang Li,Xingsijin Cao,Xiaochao Zhu,Jian Li,Shengquan Zhou,Juan Zhao,Yunan Sun,Guanyi Chen
Flue gas torrefaction (FGT) is a feasible way to improve fuel properties and enhance gasification performance. Torrefaction inevitably causes CO 2 emissions. In this study, FGT integrated with gasification based on the circulation of Mg-additive (MgO-FGT-GS) was developed to capture CO 2 released during FGT and transferred it to gasification to achieve a higher effective carbon conversion efficiency (ECC). Firstly, FGT with Mg-additive (MgO-FGT) was conducted on distilled spirits lees (DSL) and the effect of different Mg-additive (MgO) ratios was explored. Based on the characterizations of DSL and Mg-additive before and after MgO-FGT, the mechanism of MgO-FGT was revealed, and the looping property of Mg-additive was investigated. A fixed-bed gasification experiment was finally performed to validate the MgO-FGT-GS process. The results show that the optimal MgO-FGT was obtained as the MgO: DSL ratio was 1:1. Under this condition, the torrefied DSL had the highest HHV of 16.20 MJ/kg and the lowest O/C ratio. In MgO-FGT, the MgO absorbed 15.75 % of CO 2 and changed into basic magnesium carbonate. Then in gasification, CO 2 was released by Mg-additive at 800 ℃, and the Mg-additive largely returned to MgO. The LHV of syngas of the MgO-FGT-GS was 9.22 MJ/Nm 3 , which was 1.3 times higher than raw DSL. Meanwhile, the tar yield decreased by 68.99 %, and the ECC increased by 1.5 times. Therefore, the MgO-FGT-GS process shows a great improvement in gasification and better utilization of CO 2 . This study provides a technological breakthrough for the full-component utilization and low-carbon conversion of biomass.
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