JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Xuesong Ye,Jun Nan,Zhencheng Ge,Qiliang Xiao,Bohan Liu,Yujie Men,Jinyong Liu
Low-pressure ultrafiltration membrane (LPM) is an ideal technology for decentralized water supply. However, the applicability for removing ferrous iron (Fe 2+ ), manganese (Mn 2+ ), and ammonia (NH 4 + ) in the source water and related mechanisms remained unknown. To fill this major knowledge gap, we systematically compared the pristine (pr-LPM) and MnO 2 -preloaded membrane (Mn-LPM). Mn-LPM allowed higher water flux while enhancing the removal of Fe 2+ , Mn 2+ , and NH 4 + . The removal efficiency of Mn 2+ immediately reached 99.6% on the first day. The preloading of MnO 2 also enhanced the removal capacity of NH 4 + . A series of instrument characterizations suggest that a higher NH 4 + concentration resulted in a thicker bio-cake layer, correlating to the higher pollutant removal efficiency and the decrease in the stable flux. Under high NH 4 + concentrations, Anaerobic Ammonia Oxidation likely contributes to NH 4 + removal. These findings significantly improve the understanding and help the design of LPM systems for cost-effective decentralized water supply in remote areas.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2024
·
IF 21.1
Jiayu Li,Laipan Zhu,Zhiwei Zhang,Aochen Wang,Zhong Lin Wang,Longfei Wang,Dan Yang
The excitation of luminescent devices often requires complex structures with external power sources or intense mechanical stimuli. Herein, we report a novel triboelectrification-induced electroluminescent (TIEL) skin with a simple structure, which can much more efficiently convert weak mechanical aggitation into electrical and optical energy. The flexible TIEL skin utilizes a high smooth matrix PVP, and Pb(Zr x Ti 1-x O 3 ) that enhances the dielectric property and the polarization of the skin, largely improving the triboelectric properties and luminescence intensity of the skin, respectively. The pressure threshold of TIEL skin breaks the record and reaches up to 0.125 kPa, which is ten-fold lower than the lowest pressure threshold of ZnS-based optic devices reported so far. It can not only trigger large-area luminescence, but also capture the dynamic motion of pen-tip like objects. Furthermore, TIEL skin successfully achieves remote real-time transmission and analysis of visualized information, which can precisely collect the optical information of handwriting and local single-point tracking, as well as obtain individual writing habits. This study shows a highly efficient way of self-powered visualized sensing, electronic signature, and anti-counterfeit information.
研究领域:
材料科学
·
传感器技术
·
光学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Mengqi Liu,Honglin Yu,Daiming Liu,Guodong Zhang,Fei Wang
In order to enhance CH 4 adsorption and absorption performance, ZIF-8@Cu was prepared by precipitation method at room temperature, while a hydrate accelerator of SO 3 − @PSNS was synthesized by the polymerization method, and CH 4 adsorption-absorption synergistic storage in ZIF-8@Cu that pre-adsorbed SO 3 − @PSNS solution was evaluated for the first time. It was found that Cu 2+ can effectively improve the adsorption kinetics of CH 4 , causing ZIF-8@Cu to reach a higher adsorption capacity, and CH 4 adsorption capacity of ZIF-8@Cu /0.14% is 12.45 % higher than that in ZIF-8. Furthermore, Cu 2+ provides additional nucleation sites for CH 4 hydrate, thereby enhancing the overall CH 4 storage density. For the water content of R w = 0.5, the doping of 0.14 % Cu 2+ causes CH 4 storage capacity via adsorption-absorption synergy increases by 33.93 %. It is worth to note that SO 3 − @PSNS significantly reduces hydration pressure while retains CH 4 adsorption ability in ZIF-8@Cu. For R w = 0.5, hydration pressure in SO 3 − @PSNS system reduces by up to 45 % compared with that in water system, while CH 4 storage capacity increases by up to 94 %. This finding makes it possible for CH 4 dense storage under low pressure via adsorption-hydration hybrid approach.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FIRE AND MATERIALS
·
2018
·Vol. 42
·期 7
·805-815
·
IF 1.22
Qinpei Chen,Yaping He,Xuehui Wang,Tiannian Zhou,Chao Ding,Jian Wang
Summary To study the low pressure influence on the flash point and fire hazard of organic fuels and their aqueous solutions, a series of experiments has been conducted to measure the open-cup and closed-cup flash points of methanol, ethanol, and n -decane aqueous solutions including different mole fractions under different static pressures ranging from 35 to 101 kPa. The results show that both the pressure and fuel mole fraction have a nonlinear correlation with the flash point of the miscible fuel specimens like the correlation provided in this paper. For the partially miscible fuel specimens with a lower density than water, the water content has almost no influence on the flash point. The fire risks of the experimental results were analysed based on the standard GB50160-2008, which shows that the fire risk becomes higher at low pressures, and there is a critical pressure at the turning point of the change in fire classification. A method to achieve the critical low pressure of different fuels or aqueous solutions from the fire hazard classification is derived in this paper.
研究领域:
化学工程
·
安全科学
✓ 已验证
产品关联
DOI
高影响因子
Case Studies in Thermal Engineering
·
2023
·
IF 6.8
Qiurui Huang,Jingwen Weng,Dongxu Ouyang,Mingyi Chen,Xuehui Wang,Jian Wang
Adding flame retardant additives is an effective approach to improve the safety of lithium-ion battery electrolytes. This study discusses the inhibiting effects of three flame retardant additives on the combustion characteristics of electrolyte and carbonate mixed solvent under low pressure. The experimental results show that the inhibition of flame retardant additives mainly occurs in the low-boiling carbonate control stage. In contrast, the combustion of the high-boiling carbonate control stage is promoted, and the promotion effect is more significant under low pressure. When the pressure is 40 kPa, it is difficult to maintain the combustion of the high-boiling point carbonate control stage of carbonate mixed solvent, but the carbonate mixed solvent containing phenoxycyclophosphazene. Phenoxycyclophosphazene has a better flame retardant effect on the mass loss rate and combustion time of carbonate mixed solvent compared with other additives. Due to the flame retardant effect of lithium salt, the electrolyte can only complete the combustion of the low-boiling point carbonate control stage, and the flame retardant effects of the flame retardant additives in the electrolyte on the combustion mass, mass loss rate, and combustion time are weakened as the pressure decreases. Tris (2-chloropropyl)phosphate assists in reducing the temperature of the electrolyte and carbonate mixed solution.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 2
·881-890
·
IF 12.732
Peng Hu,Hao Liu,Hao Wang,Jie Zhou,Yongqing Wang,Hongbing Ji
CO2 capture, especially under ultralow-pressure regions (400–10 000 ppm), is extremely essential and challenging to keep the prolonged manual operation in confined spaces and reduce CO2 corrosion in natural gas. Although many MOFs have been covered for CO2 capture, they usually suffered from unheeded morphology engineering associated with diffusion kinetics and unbridgeable CO2 adsorption under ultralow pressure. Herein, we have successfully targeted pyrazine-functionalized Co-MOF (1a′) nanocrystals having dapper hexahedral morphology through skillfully integrating morphology engineering and pore functionality. The yielded 1a′ paradigm with snug pore microenvironment afforded record-high adsorption performance for trace CO2 capture (1.36 mmol g−1 at 400 ppm and 5.7 mmol g−1 at 10 000 ppm), yet eclipsed adsorption behavior for CH4 and N2 at 298 K. The decent pore geometry awarded 1a′ with superior property for CO2/CH4 and CO2/N2 separation, giving higher IAST selectivity (1454 for 15/85 CO2/N2 and 494 for 50/50 CO2/CH4). Besides, 1a′ showed an improved hydrophobic nature, with a desired CO2/H2O uptake ratio of 0.45 and improved diffusion selectivity (DM,CO2/DM,H2O) of 17.7. Breakthrough tests visualized that 1a′ could realize high-purity CO2 (>96%), yielding maximum CO2 productivity (162 and 164.9 litres per kilogram for 18/85 CO2/N2 and 50/50 CO2/CH4). Modeling simulations have cooperatively revealed the structure–property relationship between guest molecules and the framework. This work presents an advanced benchmark adsorbent for low-concentration CO2 capture from flue gas and natural gas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Xuesong Ye,Zhencheng Ge,Qiliang Xiao,Bohan Liu,Meng Chen,Fangmin Wu,Jun Nan
In remote areas, low-pressure ultrafiltration membrane (LPM) systems can be applied in decentralized water supplies for the treatment of groundwater containing Fe 2+ , Mn 2+ , and NH 4 + . However, improving the performance of the LPM systems, such as the stable flux and removal capacity, presents a challenge. In this study, a novel opposite-flow low-pressure ultrafiltration membrane (O-LPM) system was applied, and its performance was evaluated. Experimental results showed that after 46 days of operation, the steady flux of the O-LPM systems were 1.87-fold and 1.74-fold higher than that of the conventional D-LPM systems under Mn 2+ concentration of 0.3 mg L −1 and 1.5 mg L −1 , respectively. With a mixed pollutant system containing Fe 2+ (0.5 mg L −1 ), Mn 2+ (0.3 mg L −1 ), and NH 4 + (1.0 mg L −1 ), the O-LPM-ripening period for Mn 2+ removal was shortened from 16 days to 8 days, and the NH 4 + removal efficiency was increased from 61.46% to 80.97%. The bio-cake layer in the O-LPM systems was thinner and had a higher uniformity than in the D-LPM systems, resulting in a larger stable flux range. The relative abundance of functional bacteria (MnOB, IOB, and NOB) was generally higher in O-LPM systems than in the D-LPM systems. Overall, these results are of high relevance for groundwater treatment in remote areas, providing guidance for the widespread application of the O-LPM system in decentralized water supplies.
研究领域:
环境工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2024
·Vol. 11
·期 11
·2308623
·
IF 14.3
Chen-Han Guo,Feng-Fan Lu,Enyu Wu,Jia-Xin Wang,Defa Gu,Bin Li,Guodong Qian
The green water-based adsorption refrigeration is considered as a promising strategy to realize near-zero-carbon cooling applications. Although many metal-organic frameworks (MOFs) have been developed as water adsorbents, their cooling performance are commonly limited by the insufficient water uptakes below P / P 0 = 0.2. Herein, the development of multivariate MOFs (MTV-MOFs) is reported to highly modulate and boost the low-pressure water uptake for improving coefficient of performance (COP) for refrigeration. Through ligand exchange in the pristine MIL-125-NH 2 , a series of MTV-MOFs with bare nitrogen sites are designed and synthesized. The resulting MIL-125-NH 2 /MD-5% exhibits the significantly improved water uptake of 0.39 g g −1 at 298 K and P / P 0 = 0.2, which is three times higher than MIL-125-NH 2 (0.12 g g −1 ) and comparable to some benchmark materials including KMF-1 (0.4 g g −1 ) and MIP-200 (0.36 g g −1 ). Combined with its low-temperature regeneration, fast sorption kinetics and high stability, MIL-125-NH 2 /MD-5% achieves one of the highest COP values (0.8) and working capacities (0.24 g g −1 ) for refrig-2 under an ultralow-driven temperature of 65 °C, which are higher than some best-performing MOFs such as MIP-200 (0.74 and 0.11 g g −1 ) and KMF-2 (0.62 and 0.16 g g −1 ), making it among the best adsorbents for efficient ultralow-temperature-driven refrigeration.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Yongdi He,Jinou Song,Jiuzhong Yang,Yuan Zhuang,Liang Qiu,Zhijun Li,Shubao Song,Yongfeng Liu,Jibiao Xie
In order to investigate the species pool and primary channels of initiated pyrolysis of n- hexane, the low-pressure (30 Torr, 4.0 kPa) flow reactor pyrolysis of n- hexane initiated by 5% 1- nitropropane ( 1- NP) was studied experimentally in a wide range of temperature from 623 K to 1223 K. Combined with synchrotron vacuum ultraviolet (SVUV) photoionization mass spectra scanned at photon energies ranging from 9.0 to 14.7 eV and near-threshold photoionization efficiency (PIE) spectra, 29 pyrolysis species, covering C 1 –C 6 hydrocarbons and several pyrolysis species containing O or N atoms, were identified. Based on the ion signal intensities of the visible peaks in the mass spectra, the mole fraction profiles of all the experimental species were evaluated. The experimental results suggested that the initial pyrolysis temperature of n- hexane was reduced by approximately 275–325 K. On the basis of the mole fraction profiles and the initial formation temperatures reported in this work and rate coefficients proposed in previous studies, the 1- NP-initiated pyrolysis mechanisms of n- hexane were discussed. It was suggested that n- hexane was dominantly consumed by the H-abstraction reactions by the attack of OH radical in this work. The 1- NP-initiated pyrolysis of n- hexane mainly proceeded via reactions to produce C 3 H 6 + C 3 H 7 , or 1- C 4 H 8 + C 2 H 5 , or 1- C 5 H 10 + CH 3 .
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Peng Wu,Zai-Dong Shao,George Z. Chen,Jun He,Yu-Ming Zheng
Ammonia (NH 3 ) is a prevalent indoor pollutant, particularly in semiconductor cleanrooms, where it is essential to adhere to stringent regulations that maintain concentration levels below parts per million (ppm). The development of sustainable adsorbents exhibiting high selectivity and adsorption capacity for NH 3 at low partial pressures constitutes a critical yet challenging endeavor within this field. Herein, we introduce a class of isostructural gallate-based metal–organic frameworks (M−GA MOFs, M = Co, Mg, and Mn) endowed with abundant hydrogen bond donors within the pore channels. Notably, the Co-GA MOF exhibits an exceptionally high NH 3 uptake of 3 mmol g −1 at an ultralow pressure of 0.001 mbar, surpassing all previously reported MOFs. Density-functional theory (DFT), independent gradient model based on Hirshfeld partition (IGMH), and quantum theory of atoms in molecules (QTAIM) analyses reveal the presence of strong O-H···N and N-H···O hydrogen bonds between NH 3 and the MOF framework. These interactions, combined with van der Waals forces, contributed to exceptional NH 3 selectivity over CO 2 and N 2 , with selectivity exceeding 10 4 for NH 3 /CO 2 = 0.1 %:99.9 %. Breakthrough experiments validate the exceptional removal performance of Co-GA MOFs for trace amounts of NH 3 , with a breakthrough point observed at 14 d g −1 for a concentration of 10 ppm NH 3 . This work not only advances our understanding of ultralow-pressure gas separation mechanisms but also offers a scalable solution for efficient separation and purification of trace contaminants in environmentally relevant settings.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Somboon Chaemchuen,Zhonghan Cheng,Xiaotong Hou,Francis Verpoort,Jakkapan Kumsi,Nikom Klomkliang
High-efficient adsorptive materials for carbon dioxide (CO 2 ) capture and separation of a gas mixture are vital for energy consumption and emission reduction but are still a substantial challenge. A facile synthesis of bimetallic nickel/zinc embedded in N-doped carbon (Ni/Zn@NC) through the solid–solid thermal method (SST) is developed herein. The SST method is a straightforward procedure with the advantage that the materials are obtained in a single step and solvent-free conditions. Thermal analysis and material characterization were used to investigate the synthesis mechanism during the SST process. The results revealed that an intermediate material, initially obtained at a low thermal temperature, was sacrificed to generate Ni/Zn@NC at high temperatures of the SST method. The resulting robust carbon structure, decorated with heteroatoms (Ni, Zn, N), exhibits a potential for efficient CO 2 adsorption during the capture and separation of biogas (CO 2 /CH 4 ), off-gas (CO 2 /N 2 ), and natural gas (CH 4 / N 2 ). The synergetic effect of Ni in the materials enhances the selectivity of S CO2/CH4 , S CO2/N2 , and S CH4/N2 . The improved selectivities by effective sites were confirmed by computational modeling. Significantly, the Ni/Zn@NC material obtained through a mild yet simple synthesis method (SST) exhibits substantially higher CO 2 adsorption capacity and selectivity when compared to commercial carbon (activated charcoal).
研究领域:
材料科学
·
环境科学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 7
·3576-3585
·
IF 2.779
Gao Yue,Xiao Yu-bo,Liu Zhi-Quan,Liu Yang,Sun Rong
Cu-Cu bonding is always conducted at high temperature and high pressure in reductive atmosphere to eliminate the influence caused by oxidation. Herein, a novel low-pressure sinterable Cu nanoparticle (Cu-NPs) paste was developed using Cu Metal Organic Decomposition (MOD) ink as solvent and surface modifier. The Cu MOD ink in paste introduced in Cu nanoparticle paste not only eliminated the surface oxidation of Cu-NPs, but also modified Cu-NPs with Cu atoms due to the thermal decomposition during sintering process. As a result, robust Cu sinter joints for die-attachment could be realized at a low pressure of 0.4 MPa in non-reductive nitrogen atmosphere. Using the paste with 20 wt.% Cuf addition in solvent, a relative high shear strength of 17.1 MPa could be achieved at 300 °C, which is about 3.8 times higher than that sintered without MOD ink (4.5 MPa). When bonding temperature rose to 350 °C, even higher shear strength over 20 MPa was obtained. The bonding strength was comparable to the traditional Pb-5Sn solder alloy, promising its industrial potential.
研究领域:
材料科学
·
电子工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）