ENERGY
·
2024
·
IF 9
Huajun Zhao,Jingyi Liu,Shuaiqing Cheng,Rujie Wang,Qiangwei Li,Shanlong An,Shihan Zhang,Lidong Wang
Biphasic solvents with primary/secondary amines as the primary absorbent involve a high heat of reaction and low desorption efficiency, limiting their development. A tertiary amine-based biphasic solvent composed of diethylethanolamine (DEEA), 2-Amino-2-methyl-1-propanol (AMP), ethyl acetoacetate (EAA), and H 2 O (referred to as DEEA/AMP/EAA/H 2 O) was proposed, which exhibited superior low-temperature desorption performance and ultra-low regeneration energy. EAA was revealed to facilitate the low-temperature desorption by reducing the activation energy from 6.8 to 2.3 kcal/mol. When regenerated only by heating to 353.15 K, the CO 2 -rich phase showed a significant desorption efficiency of 88.2 %; the desorption capacity and desorption rate were even 2.23 times and 6.84 times higher than 30 wt% MEA at 393.15 K. Moreover, the desorption heat dominated by the deprotonation of tertiary amine was as low as 0.92 GJ/t CO 2 ; and low-temperature regeneration brought extremely low latent heat below 0.062 GJ/t CO 2 . Thus, the total regeneration energy was as low as 1.16 GJ/t CO 2 . In addition, EAA could trigger the phase separation and increase the absorption rate constant from 3.87 E−4 to 1.36 E−3 s −1 , even higher than 30 wt% MEA. The addition of AMP further increased the CO 2 loading (4.34 mol/L) and CO 2 distribution (97.43 %) of the CO 2 -rich phase.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2024
·
IF 3.8
Zhao Xuebin,Wang Qiuling,Ai Dan,Tian Haiying,Zhang Zhan,Cao Ke,Wang Yixuan,Qi Wei,Li Bo,Niu Yapeng,Meng Lingchuang,Gao Beibei,Li Bin
Development of low temperature catalytic pyrolysis technology for heated tobacco sheets is expected to increase the aroma of heated tobacco products and improve their overall smoking quality. In this study, the low temperature pyrolysis performances of heated tobacco sheets catalyzed by various anionic sodium salts were investigated using TG-DTG, Py-GC-MS technology and smoke routine chemical composition analysis. The results showed that the total weight loss between 100°C and 300°C increased by 7.8%–13.15% after adding various anionic sodium salts, among which, sodium acetate and sodium tartrate showed a relatively higher weight loss. The relative content of free hydroxyacetone, furfuryl alcohol, butyrolactone and megastigmatrienone in the pyrolysis gas increased, while the relative content of free nicotine decreased. With the change of anionic species, the catalytic decomposition ability of cellulose, lignin, and other substances may change, resulting in the distribution alteration of compounds in the pyrolysis gas. After adding sodium acetate and sodium citrate, the release of total particulate matter (TPM), glycerol, and nicotine in flue gas increased. Overall, the addition of sodium acetate and sodium citrate showed a higher low temperature pyrolysis performance of heated tobacco sheets. The research results in this paper provide data support for changing the low temperature catalytic pyrolysis performance of heated tobacco sheets by adjusting the type of anions in sodium salts.
研究领域:
化学工程
·
烟草科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Aobo Ren,Lianghao Jia,Pan Wang,Tao Xiang,Shaobing Zhou
Conductive hydrogels are widely used in electronic skin, wearable sensing devices, human–machine interfaces, and soft robots because of their high elasticity, biocompatibility, and conformability in interfacial contact. However, hydrogels lose electrical conductivity and flexibility due to water crystallization at low temperatures, which severely limits their applications in the frigid regions. In this study, we propose to design a metal–ligand ionic hydrogel (PAASP-Zr-LiCl) through the formation of a stable coordination bond between the dicarboxylic acid group monomer poly(N-acryloyl aspartic acid) (PAASP) and zirconium ion (Zr 4+ ). Zr 4+ –COO - metal-coordination complex as physical cross-linking points of the network can effectively improve the mechanical properties of hydrogels. By introducing lithium chloride (LiCl), the hydrogel obtained excellent anti-freezing properties (crystallization temperature < -80 °C) and high ionic conductivity (8.45 S/m). The LiCl molecules enhance the interaction between the polymer network and water molecules. The ionic hydrogel-based strain sensors exhibited a high gauge factor of 3.21. Combining hydrogel sensors with soft grippers can realize continuous and stable monitoring of grasping objects at low temperature of −30 °C. By integration of excellent flexibility (elongation at break 837.4 %), good ionic conductivity, high sensitivity, and excellent anti-freezing properties, the anti-freezing ionic hydrogel has a wide range of applications in the frigid regions of the plateau.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zean Lin,Yan Li,Dhandapani Kuzhandaivel,Xiaowen Pu,Dingpeng Peng,Longhui Zheng,Lixin Wu,Zixiang Weng
This study addresses the challenge of fabricating high-performance ceramic catalyst scaffolds with complex geometries and optimized properties by introducing an innovative approach using vat photopolymerization 3D printing of high-solid content UV-curable resins. This method enables the creation of a ceramic catalysts with tailored geometries, hierarchical porosities, and enhanced catalytic performances. Composite slurries containing up to 50 wt.% ceramic powders (pseudo-boehmite, halloysite nanotubes, and CeO 2 ) were developed and optimized for digital light processing (DLP) 3D printing, with fine-tuned rheological properties to enable the printing of complex 3D structures with deflection angle topologies. Low-temperature sintering at 600°C yielded crack-free monolithic catalysts with a high specific surface area (112.45 m 2 /g) and hierarchical porosity. The 3D printed CeO 2 /γ-Al 2 O 3 -HNTs catalysts demonstrated exceptional photocatalytic performance for tetracycline degradation, achieving 92.7% removal within 2 h, with the 3D printed topology significantly enhancing mass transfer and light utilization compared to conventional powder or honeycomb catalysts. This facile approach enables precise control over the catalyst geometry and composition, offering a versatile platform for designing advanced functional ceramic materials for environmental remediation and catalysis applications. This study highlights the potential of 3D printing technology to revolutionize catalyst design and manufacturing, paving the way for more efficient and tailored catalytic systems.
研究领域:
材料科学
·
催化化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuan Zhao,Chuanxiang Zhang,Tong Liu,Rong Fan,Yao Sun,Haijun Tao
Development of inexpensive and scalable cathode catalysts that can efficiently catalyze the oxygen reduction reaction (ORR) is of significance in practical application of fuel cells. Heteroatom doped carbons have been recognized as the promising candidate. Herein sulphur-nitrogen co-doped reduced graphene oxide (S-N-rGO) was prepared through low-temperature refluxing with sodium sulfide, ammonia and graphene oxide as the precursors. The catalytic performance of the fabricated S-N-rGO towards the ORR was assessed by electrochemical test. The effect of reaction temperature on catalytic activity was also studied. The S-N-rGO gained under the reaction temperature of 150 °C (S-N-rGO- 150 °C) demonstrates higher electrocatalytic activity and mainly four electron ORR process in alkaline condition. In addition, it also shows improved durabity and better resistance toward methanol. The excellent performance for the ORR on S-N-rGO is attributed to the synergistic effect originating from the doped S and N in the graphene sheets.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Zhen-Hong He,Na Li,Kuan Wang,Wei-Tao Wang,Zhao-Tie Liu
Quinoline derivatives are widely exist in the environment, and mainly separated from the coal tar pitch fraction. Hydrogenation of these compounds to 1,2,3,4-tetrahydroquinolines, an important class of natural products and medicinal agents, is a significant transformation of waste to valuable chemicals. In the present work, we developed a cheap and highly efficient Co 3 Cu 1 O x bimetallic catalyst and used it for the hydrogenation of quinolines at a temperature down to 60 °C. The introduction of Cu into Co catalyst changed the physical and chemical features of Co catalyst, which was characterized by Raman spectra, N 2 -adsorption/desorption isotherms, H 2 -TPR and H 2 -TPD tests. The recycling experiments indicated the catalyst was stable and possessed good reusability. Importantly, the gram-scale experiment provided a high yield (92%) to the target product, demonstrating that the catalytic system has a potential practical application.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
THIN SOLID FILMS
·
2019
·
IF 1.888
Mingyue Ma,Haidong Li,Fengmei Cheng,Daocheng Pan
Semiconducting and luminescent thin films could be served as the emitting layer in electroluminescent devices. In this work, Eu 3+ -doped yttrium vanadium oxide (YVO 4 ) luminescent thin films were directly deposited by a solution processing method, and they were annealed at a low temperature of 400 °C. Such low annealed temperature is compatible with commonly used transparent conductive electrodes, such as tin-doped indium oxide and fluorine-doped tin oxide. In addition, the luminescent thin films have a band gap of 3.94 eV and an absolute photoluminescence quantum yield of 23%. These results revealed that Eu 3+ -doped YVO 4 luminescent thin films have a high potential in electroluminescent devices.
研究领域:
材料科学
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 32
·期 12
·125703
·
IF 3.551
Penghao Zhang,Cheng Zhang,Chuansheng Zhang,Fei Kong,Ping Yan,Tao Shao
Polystyrene (PS) is a common insulating material in pulsed power devices, which has excellent and reliable insulation properties. However, the charge accumulation on the insulator surface seriously threatens its surface insulation property. Surface modification has been verified as an effective way for inhibiting surface charge accumulation. In this paper, plasma polymerized fluorocarbon (PPFC) coating was prepared by low-temperature plasma polymerization in the mixture of methyl-methacrylate and dodecafluoroheptyl-methacrylate (DFHMA). Compared with the untreated PS, the surface charge dissipation rate of PPFC coating is increased by more than 6 times. The introduction of DFHMA makes the coating have no obvious ageing effect after the storage, and has good reusability after the surface flashover. This work provides a new method for modification of polymer dielectrics and a novel way for the preparation of high-charge-dissipation polymers in other related fields.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·841-847
·
IF 4.186
Lei Han,Yu Chen,Haijun Zhang,Guangqiang Li,Quanli Jia,Shaowei Zhang
High-entropy transition-metal (IVB–VIB) carbide (HETMC) ceramics consisting of multiple principal components generally correspond to higher configuration entropy, and exhibit better overall performance. However, they also present certain synthesis challenges, for example, in the synthesis of a three-dimensional six-principal-component HETMC aerogel. In the present work, as an example a novel (Ti 0.167 Cr 0.167 V 0.167 Mo 0.167 Nb 0.167 Ta 0.167 )C aerogel was prepared at a relatively low temperature of 1773 K by an in-situ carbothermal reduction/partial sintering technique following the successful preparation of (Ti 0.2 V 0.2 Mo 0.2 Nb 0.2 Ta 0.2 )C and (Ti 0.2 Cr 0.2 Mo 0.2 Nb 0.2 Ta 0.2 )C five-principal-component HETMC aerogels. The synthesized 6-HETMC aerogel exhibited a homogeneous microstructure with grain phases and pores of 100–300 nm and 0.2–10 μm, respectively, a density of 0.45 g cm −3 , a high porosity and compressive strength of 94.5% and 0.8 MPa, respectively, a low thermal conductivity of 0.128 W (m K) −1 at 298 K, and a good high-temperature stability at least up to 1673 K in Ar. This research provided a novel strategy for future development of HETMC ceramic aerogels for high-temperature applications.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Borong Wu,Yonghuan Ren,Daobin Mu,Xiaojiang Liu,Guchang Yang,Zhe Sun
Sodium chloride (NaCl), as an attractive electrolyte additive , was added in a low temperature electrolyte to investigate its effect on LiFePO 4 electrode. A capacity as high as 115 mAh g − 1 was delivered at 2 C, which was 20 mAh g − 1 more than its NaCl free counterpart. Cyclic voltammetry (CV) tests showed that the polarization of electrode reaction decreased. SEM and XPS measurements were conducted and the result illustrated that the film was modified by NaCl to be uniform containing less resistive LiF, so the transport of Li + through the film was facilitated. Moreover, the conductivity of Li + through electrolyte was also enhanced in the presence of NaCl. NaCl effectively facilitated lithium ion transport rate to the electrode surface and improved the lithiation/delithiation behavior in the LiFePO 4 electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2022
·
IF 1.73
Kangkang Tao,Fei Qin,Yahui Li,Shuai Zhang,Shihui Han,Guangmin Liu,Jun Wang,Jun Shen,Zailin Yang,Yi Tang,Gaohui Sun
Polyimide (PI) films with excellent mechanical and electrical properties were produced at a low temperature assisted by microwave. Depending on the reciprocating movement of dipole molecules excited by microwave, even though under a low temperature, the rotation and conformational changes of functional groups could also be promoted. Thus, reaction between N-H bond and -OH in carboxyl which could realize dehydration and cyclization of polyamic acid proceeded normally. Results revealed that the combination between ambient temperature only at 70°C and microwave power at 2000 W or higher could also produce PI films with imidization degree of 100%. For PI-2000W, compared with traditional PI film (PI-300°C) that generated only at temperature of 300°C, even though on the basis of no any change in molecular structure and addition of filler, the tensile strength, elastic modulus, crystallinity, and apparent density increased by about 21%, 51%, 37%, and 5%, respectively. For electrical properties, conductivity enhanced by one to two orders of magnitude comparing with PI-300°C. Results indicated that while keeping the original molecular structure of PI films unchanged, this work provided a new and effective method to assist the enhancement in mechanical and electrical properties of PI films.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
NiNa Ma,ShuYi Ma,JiaYun Guo,GeGe Fan,Ping Ni,YinYue Wang,JiaMin Zhu,Heng Wang
In this study, we engineered a triethylamine sensor that operates at low temperatures and is distinguished by its exceptional selectivity. The experiments specifically entailed synthesizing WO 3 nanostructured composites and SnWO 4 nanorod model materials through a direct hydrothermal approach. The superiority of composite samples over pure ones was established by evaluating their gas sensitivity through rigorous testing. Given the importance of accurately detecting trimethylamine gas in intricate environments, it is remarkable that only a limited number of sensors possess this capability. To tackle this problem, we have engineered a triethylamine sensor that exhibits strong resistance to interfering gases, delivering an outstandingly swift response time of 50 s and a recovery time of just 7 s. The composite sensor demonstrates remarkable sensitivity to 200 ppm of triethylamine gas, exhibiting a response that is 5.4 times more pronounced than that observed in the pure sample. The integration of WO3 notably decreases the optimal operating temperature of the SnWO 4 sensor from 240 °C to 130 °C, while also demonstrating a response value of 6.6 at reduced gas concentrations of 5ppm. Furthermore, the engineered gas-sensitive material demonstrates remarkable repeatability and enduring stability upon exposure to triethylamine. Further discussion delved into the gas sensing mechanism of the WO 3 /SnWO 4 gas sensor. In conclusion, this study presents a novel perspective on the sensitivity and selectivity of gas sensors, demonstrating extensive practical utility and significant application value.
研究领域:
材料科学
·
传感技术
·
纳米技术
✓ 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）