CRYSTENGCOMM
·
2017
·Vol. 19
·期 47
·7207-7212
·
IF 3.474
Zhiyan Chen,Yabo Zhu,Jia Lei,Wanying Liu,Yunke Xu,Peizhong Feng
In the preparation of black phosphorene (BP) by means of low-pressure mineralization, the complex temperature program makes the synthesis mechanism complicated and confusing. Herein, orthorhombic BP crystals were successfully synthesized by low-pressure mineralization and the phase transitions at every stage were revealed systematically and were accurately confirmed via a series of interference experiments and supported by structure characterization. Additionally, the nucleation agents and nucleation sites were systematically investigated. Based on this, we found that the synthesis of BP is a process of stage-by-stage phase-induction. At first, red phosphorus (RP) is transformed to Hittorf's phosphorus (HP) without the assistance of mineralizers. Subsequently, HP is transformed into BP at the cooling stage. Moreover, Sn24P19.3I8 should work as the sole nucleation agent, and leads to BP crystal nucleation and growth to form large crystals in the subsequent heat preservation stage. Also, the nucleation site lies in the product region opposite the source region. In addition, the radial morphology of the BP crystal bunches under an RP/SnI4/Sn (granule) system was revealed firstly, and taking the straps out from the BP bunches is convenient for exfoliating.
研究领域:
材料科学
·
凝聚态物理
·
纳米技术
·
晶体生长
·
功能材料
✓ 已验证
DOI
高影响因子
GLASS PHYSICS AND CHEMISTRY
·
2021
·Vol. 47
·期 3
·265-269
·
IF 0.883
Kai Ma
Abstract In this paper we present a new diamond synthesis method via introduction of highly reactive carbon atoms generated from chemical reactions as the raw materials of diamond. Experiments have shown that by this method the diamond can be synthesized with high yield at pressures as low as 3 GPa and temperatures as low as 900°C. Compared with the conventional phase transformation method, the pressure decreases by about 45% and the temperature decreases by about 35%. XRD, Raman spectroscopy and other characterization analyses have shown that the crystal structure of the diamond synthesized is perfect and the impurity content is low. This is a promising method of diamond synthesis, but requires further optimization.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
GLASS PHYSICS AND CHEMISTRY
·
2020
·Vol. 46
·期 2
·181-185
·
IF 0.668
Kai Ma
Abstract In this paper, we present a new cubic boron nitride synthesis method via introduction of highly reactive nitrogen and boron atoms generated from chemical reactions as the raw materials of cubic boron nitride, so the system pressure and temperature are reduced significantly compared with the traditional phase transformation method at super high-pressure and high-temperature, and then the production cost of cubic boron nitride can be reduced greatly and the equipment service life can be extended significantly. Experiments have shown that by this method the cBN can be synthesized with high yield at pressures as low as 2.5 GPa and temperatures as low as 450°C. Compared with the conventional phase transformation method, the pressure decreases by about 50% and the temperature decreases by about 64%. Analyses have shown that the crystal structure of the cBN synthesized is perfect and the impurity content is extremely low.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
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
Processes
·
2023
·Vol. 11
·期 7
·2167
·
IF 3.5
Feng Yao,Chuanpeng Li,Junyang Li,Guoli Chang,Yuliang Wang,Roberta Campardelli,Patrizia Perego,Chenggang Cai
Diets including rice and rice-cooking methods influence digestive processes and blood glucose control. In this research, the effects of three different treatments (high-temperature and low-pressure plasma cooking, high-temperature cooking at atmospheric pressure (traditional method), and high-temperature cooking at high pressure) on the texture, color, molecular structure, infrared spectrum, microstructure, debranching enzyme activity, amylopectin content, glycemic index (GI), and in vitro starch digestibility of two rice varieties were studied. The results showed that the hardness, elasticity, viscosity, and chewability of rice after the high-temperature and low-pressure plasma treatment had no obvious changes compared with the traditional cooking method. A SEM analysis showed that the physical properties of the hydrophilicity on the surface of the rice increased after the high-temperature and low-pressure plasma treatment; the debranching enzyme activity reached 3.88 U/g (Xiantao rice) and 3.81 U/g (Heyuan rice), respectively, the amylose content of raw rice reached 68.77 mg/mL (Xiantao rice) and 64.92 mg/mL (Heyuan rice), which increased by 43.31 mg/mL and 39.46 mg/mL, respectively, and the GI was within the medium glycemic index of 56–69. The resistant starch in the Heyuan and Xiantao rice varieties amounted to 88.60 ± 3.10% and 89.40 ± 3.58%, respectively, after the high-temperature and low-pressure plasma processing method. The results showed positive effects and application potential for the cooking method in respect of diabetic consumers.Keywords:rice;cooking method;high-temperature and low-pressure plasma technology;glycemic index
研究领域:
食品科学
·
营养学
✓ 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
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Zonglun Li,Dexiang Gao,Shuxin Chen,Lei Yue,Bao Yuan,Xudong Shen,Le Kang,Quanjun Li,Bingbing Liu
Examining the evolution of photocurrent response in materials under high pressure is an exceptionally effective strategy for deepening our understanding of the intricate relationship between the material structure and its photoelectric-related properties. Herein, we demonstrated the low compressibility of the photoelectric properties of AsI3. With increasing pressure, the photocurrent response of AsI3 under 520 nm laser and xenon lamp illumination exhibits irregular yet gentle fluctuations within the range of 0.67–1.56 nA and 7.4–21.2 nA, respectively, demonstrating low sensitivity to pressure. In stark contrast, the elongation of As–I bonds culminated in a distinct molecular-ionic crystal isostructural transition around 4 GPa, while the bandgap underwent a pronounced monotonic decrease upon compression. This discrepancy may originate from the low dispersion of the valence band and conduction band in AsI3, causing irregular shifts of the valence band maximum and conduction band minimum within the Brillouin zone under pressure. These findings unveil a fresh perspective for gaining a deep understanding of the electronic structure and photoelectric properties of layered non-metal halides, potentially catalyzing the exploration and advancement of high-performance photoelectric materials.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）