CHEMICAL ENGINEERING & TECHNOLOGY
·
2017
·Vol. 41
·期 2
·353-366
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IF 2.051
Shumin Wang,Qingping Guo,Shujun Liang,Peng Li,Xin Li,Jujie Luo
For the evaluation of CH 4 /N 2 separation, mixed-matrix membranes (MMMs) were fabricated by adding [Ni 3 (HCOO) 6 ] as a filler into the poly(styrene- b -butadiene- b -styrene) (SBS) polymer. The structures and morphologies of [Ni 3 (HCOO) 6 ] and [Ni 3 (HCOO) 6 ]/SBS MMMs were characterized by different techniques, proving the crystalline structure of [Ni 3 (HCOO) 6 ] in SBS polymer matrices. The structural integrity of the MMMs and good compatibility between [Ni 3 (HCOO) 6 ] and SBS polymer were examined by scanning electron microscopy. Gas permeation measurements revealed that membranes containing various [Ni 3 (HCOO) 6 ] loadings exhibited different separation performances. The operational temperature exerted a significantly positive effect on the separation of CH 4 and N 2 .
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NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 15
·6003-6009
·
IF 3.288
Yuhang Jiang,Qiuwan Shen,Shian Li,Guogang Yang,Naibao Huang
B-site cobalt-doped perovskite oxide BaNiO3 oxygen sorbents have been synthesized by an EDTA sol–gel method and further applied for producing oxygen. BaCoxNi1−xO3−δ oxygen sorbents were characterized by scanning electron microscopy (SEM) and cyclic oxygen adsorption/desorption experiments. Results showed that BaCo0.6Ni0.4O3−δ features higher production amounts of oxygen among the candidates. The operating factors of oxygen releasing performance were investigated in detail including adsorption temperature, desorption temperature, adsorption time, CO2 flow rate and CO2 partial pressure. It was concluded that the temperature and CO2 flow rate are the main reasons affecting the performance of perovskite oxygen sorbents. The optimal operating parameters of oxygen releasing performance for BaCo0.6Ni0.4O3−δ were as follows: adsorption temperature was 850 °C, desorption temperature was 850 °C, air adsorption time was 30 min, CO2 flow was 200 ml min−1 and the ratio of CO2/N2 was 100 : 0. The oxygen production amount of BaCo0.6Ni0.4O3−δ was 49.5 mg g−1 under the optimal reaction conditions. Finally, multiple cycles demonstrated that BaCo0.6Ni0.4O3−δ displays higher stability and regeneration capacity, which is the key factor providing a stable O2/CO2 gas stream for oxyfuel combustion application.
研究领域:
材料科学
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无机化学
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能源化学
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化学工程
·
功能材料
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Liang Chen,Dongmei Luo,Zhenghao Wang,Kejing Wu,Lei Song,Hongjiao Li,Shan Zhong,Siyang Tang,Bin Liang
Chemical looping hydrogen generation (CLHG) offers a promising solution for producing H 2 from industrial off-gas, such as blast furnace gas. However, increasing H 2 production capacity of the oxygen carrier (OC) at moderate temperature remains a significant challenge. In this study, a novel Cu-Fe-based OC is tailored for moderate-temperature CLHG from blast furnace gas. The results demonstrates that the tailored OC exhibits a superior H 2 production capacity of 12.99 mmol·g −1 at 550 °C, which is 6.5 times higher than that of Fe 2 O 3 at the same temperature. The addition of Cu leads to the formation of oxygen defects, which facilitate the migration of lattice oxygen, thereby the activity of the OC is enhanced. Furthermore, cyclical experiments demonstrates that O 2 -assisted regeneration strategy can effectively suppress the segregation of Cu during the cycling process, and the tailored OC shows good stability during 10 redox cycles. No additional separation process was required and the purity of the hydrogen was higher than 99%. The findings here open a new avenue for efficient CLHG from industrial off-gas at moderate operation temperature.
研究领域:
能源化学
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材料科学
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化学工程
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工业气体利用
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氢能技术
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RSC Advances
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2017
·Vol. 7
·期 11
·6242-6250
·
IF 3.108
Pengchao Wang,Yongjun Hu,Huaqi Zhan,Jiaxin Chen
Glycoaldehyde (GA, HOCH2CHO) is the simplest sugar unit of the carbohydrates and the only sugar to have been detected in interstellar space to date. In the present report, the conformation of GA and its flexible hydrated complexes have been investigated in the gas phase by using mass-selected infrared (IR) spectroscopy based on vacuum-ultraviolet single photon ionization (118 nm). With the aid of theoretical calculations, the neutral GA bearing a ring-type intramolecular hydrogen bonding interaction was confirmed to be the dominant isomer in the gas phase. Moreover, the water molecules in the monohydrated complexes preferentially broke the intramolecular hydrogen bond and bridged the carbonyl oxygen and hydroxyl hydrogen of GA with two additional intermolecular H-bonds, revealing the “working rules” governing preferred binding. The theoretical results confirmed that the existence probability of the two lowest energy conformations stabilized by two intermolecular hydrogen bonds would be larger than that of the next two isomers with one intramolecular plus one intermolecular hydrogen bond. Structural investigation of hydrated GA conformers has revealed that the water molecules play the role of a bridge through intermolecular H-bonds, achieving selective population of specific GA molecular conformations. These results suggest that these hydrogen-bonded bridge structures in the hydrated complexes may provide good models for recognition in larger systems.
研究领域:
物理化学
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天体化学
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分子光谱学
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计算化学
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APPLIED ENERGY
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2015
·
IF 5.613
Zhi-Ming Xia,Xiao-Sen Li,Zhao-Yang Chen,Gang Li,Ke-Feng Yan,Chun-Gang Xu,Qiu-Nan Lv,Jing Cai
Treatment and subsequent use of biogas are garnering huge interest for both energy recovery and mitigation of environmental impact. However, separation process is pivotal for increasing its calorific value and removing CO 2 . This work presents the kinetic and separation efficiency study as well as microcosmic structure analysis for purifying simulated biogas (45.0 mol% CO 2 /CH 4 binary mixture) through hydrate crystallization approach. Particularly, synergic additives comprise gas solvent (dimethyl sulfoxide (DMSO)) and traditional hydrate promoter (tetrahydrofuran (THF) or tetra-n-butyl ammonium bromide (TBAB)) were proposed to enhance the hydrate-based separation process. The promotion mechanism was explored through in-situ Raman spectroscopy. The residual gas phase and the decomposition gas phase from the hydrate slurry were sampled and analyzed. Based on the experimental data, the gas storage capacity, unit system gas consumed rate, gas selectivity and separation efficiency were calculated for evaluating the separation process. It was found that, the synergic additives could promote the mixture hydrate formation process due to DMSO (acid gas solvent) could improve both rate and selectivity of CO 2 during the dissolution and diffusion processes. In addition, the Raman analysis reveals that the simulated biogas forms structure II hydrate and semiclathrate framework with THF–DMSO and TBAB–DMSO respectively, and CH 4 molecules are only found in the smaller (5 12 ) cages of the mixture hydrates. It is inferred that DMSO just performs as an acid gas solvent during the gas dissolution and diffusion processes but not participate in the hydrate framework formation. It will be of practical interest in relation to resolving the bottleneck of hydrate-based biogas purification technology and of potential importance for the industry application of gas hydrate.
研究领域:
能源工程
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环境科学
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气体分离技术
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水合物化学
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Guang Nie,Wenxuan Zhang,Hao Ding,Yanfei Qiao,Wensheng Wang,Siqi Dong,Siqi Rao,Chongjie Wang,Yingchun Li,Zhichao He
To address the challenge of fruit spoilage, this study developed an eco-friendly composite film (CGTZ-P) with dual functionality for gas regulation and ethylene adsorption. The film incorporates biodegradable PBAT microspheres to form porous gas-permeable channels and mesoporous nano-zeolites modified with tannic acid as ethylene scavengers. The optimized CGTZ-P1 formulation demonstrated remarkable mechanical enhancement, with tensile strength and elongation at break increasing by 455.84% and 49.45%, respectively, compared to the control film. The composite film exhibited improved CO₂/O₂ selectivity, strong antioxidant activity (DPPH radical scavenging: 72.10%; ABTS radical scavenging: 81.22%, and effective antibacterial effects against both Staphylococcus aureus and Escherichia coli . In the strawberry storage trial, the CGTZ-P1 film extended the shelf life by over 7 days at room temperature by maintaining fruit freshness, reducing weight loss, and delaying pH changes. This work provides a sustainable approach for developing multifunctional biodegradable packaging materials for fruit preservation.
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Sufaid Shah,Muhammad Sajid,Mobashar Hassan,Zeeshan Muhammad,Xiaojin Zhao,Shahid Hussain,Matin Ashurov,Osama Gohar,Xiaofang Pan
We report a precisely controlled two-step hydrothermal synthesis of stannic oxide (SnO 2 ) nanoparticle-decorated zinc oxide (ZnO) nanorods and a comprehensive study combining experimental analysis with Density Functional Theory (DFT) calculations to explain the improvement mechanism of NO 2 sensing. The optimized ZnO/SnO 2 sensor shows a significantly enhanced response of 249.9 s to 5 ppm NO 2 at 150 °C, a temperature particularly lower than that of many conventional metal oxide sensors, with fast response/recovery times (77/80 s) and outstanding selectivity. Importantly, the sensor demonstrates dynamic performance in humid environments and exceptional long-term stability. DFT calculations disclose that the heterojunction formation enables stronger NO 2 adsorption ( E ads = −1.0 eV) and greater charge transform which is confirmed by density of states analysis. This study provides not only a high-performance sensor candidate for real-world NO 2 detection but also a profound mechanistic insight through the synergy of experimental besides theoretical approaches.
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Nanoscale
·
2026
·
IF 5.1
Xiaohong Jiang,Zhimin GUO,Shiqun ZHANG,Leilei JIA,Yawei WANG,Xinrui ZENG,Yaxin LEI,Hanbin Liu,Guodong Liu,Zhijian Li,Wenliang ZHANG,zhibin lei
The sensor for nitrogen dioxide (NO2) detection plays a crucial role in environmental monitoring and human health. However, traditional oxide-based NO2 sensors often suffer from high operating temperatures, low sensitivity, and inherent rigidity. In this work, a high-performance, wearable NO2 gas sensor that can work at room temperature was developed based on a nanocomposite of single-crystal tungsten oxide (WO3) and tin dioxide (SnO2). The results show that the fabricated SnO2/WO3 based sensor demonstrates superior performance than the bare WO3 sensors. Specifically, the Sn/W-O-12 based sensor shows a remarkable response of 27.5% to 5 ppm NO2, a low detection limit of 218 ppb at room temperature. Furthermore, its response/recovery time to 0.8 ppm NO2 is 63/38 s, respectively. The sensing device also exhibits excellent humidity resistance (50%) and long-term stability (90 days). The enhanced NO2 sensing performance can be attributed to the formation of heterojunction interface, achieved by the dispersion of small-sized SnO2 particles onto WO3 nanorods, which increases the specific surface area and facilitates charge transfer and gas molecule adsorption on the surface. Additionally, a NO2 gas detection and alarm system was constructed to realize the real-time display and alarm functions. This work contributes to the detection of low concentrations of NO2 at room temperature, fostering the development of wearable sensing systems.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Hui Xin,Rongtan Li,Xuyuan Huang,Dan Li,Lan Wu,Xiandeng Hou
The coordinatively unsaturated metal species of metal oxides always play important roles in both constructing oxide-based catalysts and catalyzing some reactions. However, it is a challenge to tune its surface density and stability due to the uncontrolled reduction. Herein, we deposit MoO3 onto different oxides via the simple dry combustion method and find that the host oxides affect formation of coordinatively unsaturated Mo species through the oxide–support interaction, thus strongly altering their reverse water–gas shift activity. The strong oxide–support interaction lowers the reduction temperature of the amorphous oligomeric MoOx species on m-ZrO2 and a-TiO2 supports, generating high surface content of coordinatively unsaturated MoO2-x species with high stability, compared with those on CeO2, γ-Al2O3, and SiO2 supports. Consequently, MoO3/m-ZrO2 displays the highest CO2 reaction rate through the formate reaction pathway, i.e., 19.2 mmolCO2·gcatal–1·h–1, followed by MoO3/a-TiO2 (12.8 mmolCO2·gcatal–1·h–1), which are 21 and 14 times higher than that of MoO3, respectively. Moreover, the MoO3/m-ZrO2 and MoO3/a-TiO2 catalysts also display good stability during the 60 h reaction due to the strong interface bonding. This work provides a way to mediate catalytic performance of metal oxide catalysts through the oxide–support interaction.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Menghuan Wu,Yifang Zhang,Zhiping Xu,Yuqi He,Jialei Wang,Tian Xie,Shuduan Deng,Lidan Zhang,Gang Zhu
Metal–organic frameworks often lose CO 2 capacity in hot, humid flue gas because H 2 O competes for open metal sites (OMSs). Here we report a dual-stabilized, wood-based adsorbent in which Mg-MOF-74 is grown on an aminated wood sponge and overcoated with an ultrathin polydimethylsiloxane (PDMS) layer, coupling support immobilization with interfacial hydrophobization while preserving access to OMSs. Under flue-gas-relevant conditions (323 K, 50% RH), the material delivers a CO 2 uptake of 1.68 mmol·g −1 (≈89% of its dry-state capacity) and an IAST CO 2 /N 2 selectivity of 144 for a 50/50 mixture at 323 K. Humid-gas breakthrough tests confirm robust separation performance. Density functional theory (DFT) calculations attribute the humidity tolerance and selectivity to the synergy between accessible OMSs and PDMS-mediated interfacial polarity, without increasing the isosteric heat of adsorption, thereby enabling energy-efficient regeneration. The framework retains its crystallinity after 30 days of water immersion, and a techno-economic estimate projects a material cost of approximately US$10.36 kg −1 at a 1000 t·yr −1 scale. This scalable architecture reconciles capacity, selectivity, humidity resistance, and cost for post-combustion CO 2 capture.
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Journal of the Taiwan Institute of Chemical Engineers
·
2020
·
IF 4.794
Guochen Zhang,Jianjun Chen,Yang Wu,Xi Liu,Pengfei Qu,Puqing Shen,Lin Zhong,Yaoqiang Chen
Natural gas vehicles (NGVs) have less CO 2 emission and have been attracting more attention. However, catalyst is needed to remove pollutants such as CO, NO x and unburned methane in NGVs’ exhausts. The development of catalysts with high resistance to chemical poisoning, especially to phosphorus poisoning induced by lubricating oil of NGVs’ engine, is a challenge. Herein, we developed a new strategy to improve the phosphorus resistance of model palladium catalyst using phosphate-modified alumina as support for NGVs. The catalysts were analyzed by N 2 -physisorption, X-ray fluorescence spectrum (XRF), X-ray diffraction (XRD), CO-chemisorption, in-situ DRIFTS and X-ray photoelectron spectrum (XPS). The results show that phosphate-alumina support helps the model catalyst maintain its textual properties, otherwise phosphorus species from lubricating oil would deposit on the surface of catalyst and block the catalytically active sites. Moreover, the relative content of active Pd 0 on phosphate-modified alumina support will not decrease. Therefore, compared with conventional Pd catalyst on alumina, the model Pd catalyst on phosphate-modified alumina can show significantly enhanced phosphorus resistance under operating conditions for NGVs, and can nearly maintain its catalytic performance of removing pollutants upon phosphorus poisoning. Our work would provide a general method for development of catalyst with high performance for NGVs.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Dandan Zhao,Yuchun Ren,Chen Fu,Yiqing Liu,Dongmei Wang,Zhengjun Gong,How Yong Ng
The rapid expansion of the shale gas industry has led to the production of large volumes of wastewater containing valuable lithium resources. Although various lithium-ion sieve (LIS) materials have been developed for selective lithium recovery from shale gas wastewater (SGW), their adsorption capacity and selectivity are severely limited under natural near-neutral conditions. Here, a polydopamine (PDA)-modified Ni–H 2 TiO 3 (HTO)/MXene/polysulfone (PSF) composite membrane was developed for sustainable and selective lithium recovery from real SGW at its natural pH of 7.92. Surface polymerization of dopamine modulated the zeta potential of the membrane, effectively enhancing its Li + adsorption performance. The PDA/Ni-HTO/MXene/PSF membrane achieved a high adsorption capacity of 38.31 mg g −1 within 2 h, while maintaining excellent cycling stability and fouling resistance. Mechanistic analyses revealed that the synergistic effects between PDA and MXene enhanced the electronic capture ability of Ti–O and C–O coordination sites and activated interfacial π-electronic structures and charge redistribution, thereby promoting Li + adsorption and transport. The integrated membrane-based approach couples lithium recovery with wastewater treatment, offering a pathway for simultaneous resource recovery with reduced chemical input and secondary salinity loading.
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