COMBUSTION AND FLAME
·
2025
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IF 6.2
Xiandie Zhang,Haozhe Li,Xuxu Cui,Xinwen Ma,Jiaming Liu,Xiaode Guo,Xiang Zhou
The passivation layer of Al powder hinders the mass transfer during Al combustion. Fluorinated oxidants, such as metal fluorides and fluoropolymers, substantially improve the combustion behaviour of Al powder. Herein, a simple solvothermal method is employed to produce a high-entropy acicular accumulational fluorine-containing oxidiser based on ammonium fluoroferrates. The characterization results indicate that heating the fluorine-containing oxidiser can release gaseous products of HF and NH 3 . HF etches the passivation layer, and NH 3 provides kinetic energy to the fuel, resulting in multiple hot spots and secondary combustion as well as prevention of reaction sintering. Compared with traditional FeF 3 , this novel fluorine-containing oxidiser considerably improves the combustion of Al powder by reducing its onset temperature as well as increasing its exothermic enthalpy, flame area and F release ability.
研究领域:
材料科学
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燃烧化学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2023
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IF 7.3
Hari Bandi,Ashok Kumar Kakarla,Kedhareswara Sairam Pasupuleti,R. Shanthappa,P.P. Waifalkar,Moon-Deock Kim,Jae Su Yu
Vanadium-based metal oxides are used in different fields like gas sensors, supercapacitors , and lithium (Li)-ion batteries due to their availability, layered structure, and facile synthesis. Herein, we report a temperature-effective strategy to synthesize hexagonal-shaped zinc vanadate (Zn 2 VO 4 (ZVO)) nanostructures (NSs) via a facile hydrothermal method without any further doping of an element or carbon additive. The synthesized ZVO NSs provide large surface area, low energy band gap, and fast Li + diffusion. When compared with the ZVO-120 (synthesized at 120 °C) and ZVO-160 samples, the ZVO-140 sample shows a lower energy band gap value of 2.57 eV with higher surface area (37 m 2 g −1 ) and porous nature. As an anode material for Li-ion batteries, the ZVO-140 demonstrates superior rate capability (126 mA h g −1 at 1.5 A g −1 ) and excellent cycling performance (576 mA h g −1 after 100 cycles at 0.05 A g −1 and 327 mA h g −1 after 2000 cycles at 1 A g −1 ) as well as good Li + diffusion coefficient (2.61 × 10 −8 cm 2 s −1 ). Due to these synergistic benefits, ZVO NSs are used for NH 3 gas sensing application. The ZVO-140 sample exhibits excellent sensitivity (47.3%) at 190 °C with fast response/recovery time (136 s/128 s) and reliable stability towards NH 3 gas (100 ppm) at 190 °C, when compared with counterparts (ZVO-120 and ZVO-160). This preparation strategy may initiate the design of advanced ZVO-based materials for multifunctional applications.
研究领域:
材料科学
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能源存储
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传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qiaowen Zheng,Yanmei Zhou,Jiarong Huang,Heng Lu,Shaoru Wu,Junying Zhang,Yishan Li,Wenping Hong,Xiaohong Tan,Jinming Lin,Qiang Chen,Feiming Li,Zhixiong Cai,Maosheng Zhang
Cu-based perovskite nanocrystals (NCs) have received great interest as alternatives to lead-based perovskite NCs due to their unique advantages of resource abundance and being environmentally friendly. However, the issue of their inherent low luminous efficiency has limited the application of fluorescence sensing fields. In this work, a highly sensitive fluorescence sensor based on Cu-based perovskite NCs has been constructed by embedding Cs 3 Cu 2 I 5 NCs in room temperature curable deep eutectic solvents (Cs 3 Cu 2 I 5 -DES) for the detection of NH 3 gas in the atmosphere. In this strategy, Lauric acid-based DES with room temperature curable property were successfully synthesized and used as the supporting materials of Cs 3 Cu 2 I 5 -DES sensing film. When NH 3 gas exists, NH 3 can be adsorbed and enriched on the surface of Cs 3 Cu 2 I 5 -DES film, and react with the carboxyl group on the DES, which leads to a significant decrease in the fluorescence intensity of Cs 3 Cu 2 I 5 -DES film. Under optimized experimental conditions, the as-prepared sensing film demonstrated a good linear relationship between the decreased intensity of the fluorescence and the NH 3 concentration, and a low limit-of-detection (LOD) of 0.0642 ppm for NH 3 . Furthermore, the sensor also exhibited excellent selectivity and good stability.
研究领域:
材料科学
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环境科学
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化学传感器
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 27
·14326-14335
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IF 14.511
Qihua Sun,Zhaofeng Wu,Zhangjie Qin,Xuan Chen,Chuanchuan Zhang,Biaobing Cao,Haiming Duan,Jun Zhang
Inspired by the similarity between the pleated structure of rose petals and the pleated structure of a dog's maxillary turbinate, porous biomass carbon materials with a pleated structure have been successfully prepared from rose petals by direct carbonization. Detailed SEM and TEM characterization showed that the carbonized rose tea (CRT) at 600 °C exhibited a mimetic structure very similar to the dog's maxillary turbinate. The trace K element was detected in the prepared CRT materials, which effectively improved the adsorption capacity of the CRT materials for NH3 as revealed by density functional theory based on first-principles calculations. As a result, the CRT sensor showed an ultra-high response (60.16k%) to 500 ppm NH3 with a theoretical detection limit of only 4.82 ppb, in addition to showing a fast recovery (2.0 s), excellent repeatability and long-term stability. Moreover, the formation of nanopores in the pleated structure of the CRT and the sensing mechanism of NH3 were analyzed. Through a simple, inexpensive and efficient method, this study provides a new strategy for the preparation of a high-performance gas sensor with a bionic structure by directly using the similarity between the biomass structure and dog nose structure.
研究领域:
材料科学
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环境科学
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仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2017
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IF 6.035
Lin Li,Jun-Wei Wang,Hao Zhong,Lu-Yuan Hao,Hamidreza Abadikhah,Xin Xu,Chu-Sheng Chen,Simeon Agathopoulos
The α-Si 3 N 4 membrane was prepared by tape casting of silicon slurry, followed by calcination at 1300 °C in flowing NH 3 gas. It comprised of α-Si 3 N 4 nanowire of diameter 70 nm which were converted from silicon powder via the vapor–liquid–solid (VLS) growth mechanism. The surface of the obtained membrane was transformed from hydrophilic to superhydrophobic , with a high water contact angle of ~ 160°, by coating with a vesicular SiNCO nano-layer. The experimental results showed that nanowire structure also favored superhydrophobicity. Water desalination performance of the membrane was tested with a sweeping gas membrane distillation (SGMD) device. High water flux of 8.09 l m −2 h −1 was achieved for 20 wt% NaCl aqueous solution in the feed at 90 °C, which was maintained for more than 500 h.
研究领域:
材料科学
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化学工程
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水处理
✓ 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）