JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 22
·20589-20600
·
IF 2.22
Zhang Jianxia,Guo Huixiao,Li Shuo,Li Yu,He Yue,Li Xiaosong,Tian Chunxia,Sun Dan,Liu Li
The structure and surface properties of the sensing materials have been considered as the main factors for the fabrication of metal–oxide semiconductor gas sensors. In this paper, a one-step hydrothermal method for the preparation and control of the morphology of α-Fe 2 O 3 is reported. The results show that the amount of glycol has a great influence on the morphology of the products. With the variation in ethylene glycol concentration (from 30 to 110 ml), we can obviously see the product was assembled into three-dimensional porous α-Fe 2 O 3 micro-flower structure from two-dimensional nanochips from scanning electron microscope (SEM) pictures. When the ethylene glycol was 70 ml, the micro-flower structure was the most uniform and perfect. It additionally showed the largest specific surface area (63.69 m 2 /g) and the biggest oxygen vacancy in nitrogen adsorption–desorption and XPS analysis. Further gas sensitivity test showed that gas sensitivity was also the best. Under the low operating temperature (210 °C), the porous α-Fe 2 O 3 micro-flower (70 ml glycol) showed the highest response (49.4) to 100 ppm acetone, the sensitivity of other materials was 8.2/30 ml, 14.7/40 ml, 38.4/50 ml, 36.7/90 ml, 10.3/100 ml, 4.8/110 ml, respectively. In addition, the porous α-Fe 2 O 3 micro-flower (70 ml glycol) has excellent selectivity, short response/recovery time (1 s/31 s), low detection offline (2.2 to 0.2 ppm acetone), and good stability. The reason for the improvement of gas-sensing performance is mainly due to the change of morphology, decrease of crystallite size, the increase of oxygen vacancy, and specific surface area.
研究领域:
材料科学
·
传感器技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 34
·16143-16157
·
IF 3.553
Xu Lingling,Zhao Yajuan,Zhao Changhao,Hu Tao,Wang Jing,Liu Yi,Tian Yong,Wang Xiufang
Abstract Flower-like porous carbon has fascinated significant attention due to its outstanding and exceptional properties. However, controlled synthesis of porous carbon with adjustable morphology, highly active sites and cross-linked pore channels remains still a great challenge. Herein, an inimitable dissolution–reassembly anisotropic growth strategy was firstly demonstrated for the fabrication of idiographic orchid-like hierarchical porous carbon with ultra-thin multilayer carbon sheets, high specific surface area (1063 m 2 g −1 ), large pore volume (0.82 cm 3 g −1 ) and rich nitrogen content (7.6 wt%). Highly reactive phloroglucinol and EDA aggregated magically and SiO 2 acted as a pore former. Ingeniously, acetone acted as a “surgical knife,” which cut the composite of SiO 2 @phloroglucinol–EDA into many tiny units and further anisotropic growth into orchid-like polymers. The width and thickness of the carbon petals can be effectively controlled with the diversification of acetone concentration. Intriguingly, monodisperse hollow carbon nanospheres could be harvested with silicon-deficient system, which may offer new insight into the construction of functionalized carbon materials with hollow architecture. Owing to the unmatched superstructures, orchid-like carbon materials can be employed as an ideal drug carrier and dye adsorbent. Graphic abstract Figure Schematic illustration of solid carbon nanosphere, hollow carbon nanosphere and OHPC-25. For the first time, a novel dissolution–reassembly route based on strong hydrogen-bonding interaction was developed to prepare unique orchid-like hierarchical porous carbon, in which phloroglucinol acted as a carbon precursor and EDA both as a base catalyst and as a nitrogen precursor. The critical step to this synthetic approach was the ingeniously employed acetone as a “surgical knife” to cut the composite of SiO2@phloroglucinol–EDA into many tiny units, and these units were reassembled into orchid-like polymers. After adding acetone, the morphology of carbon materials has changed from solid nanospheres to hollow nanospheres. This strategy did not use any template as the cavity, which may offer a new insight into the comprehension of synthesized functionalized carbon materials with hollow architecture.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Xiaomi Meng,Lin Yang,Wenju Jiang,Lu Yao
In this study, a N-functionalized porous carbon derived from ZIF-8 (NFPC) was prepared and applied for the gaseous acetone and toluene adsorption removal. The NFPC perfectly inherited the morphology of parent ZIF-8, posed a high specific surface area (S BET = 1228 m 2 ·g −1 ), be rich in surface nitrogen functional groups, and resulting in a good dynamic adsorption of the VOCs. The NFPC-1000 exhibited the best adsorption performance of low concentration acetone and toluene, with equilibrium adsorption capacity of 203.4 and 297.1 mg·g −1 at 25 °C respectively. The acetone and toluene adsorption were spontaneously and exothermic, given the negative values of free energy (ΔG) and enthalpy (ΔH). The difference of acetone and toluene adsorption on NFPC attributed to the affinity difference (boiling point, polarity and molecular diameter), the nitrogen-containing functional groups (pyridinic-N) and the cation-π bonding. Therefore, the NFPC was found to be more favorable for aromatic compounds adsorption, the toluene adsorption of NFPC-1000 only decreased 5.3% after 6 cycles reuse, while its adsorption capacity of acetone lost more than 60%.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Cell Metabolism
·
2025
·
IF 30.9
Shujun Cui,Danyang Chong,Yi-Xin Wang,Huixian Tong,Minggui Wang,Guo-Ping Zhao,Liang-Dong Lyu
Fasting metabolism is a commonly observed motivational response to acute infections and is conceptualized as being beneficial for host survival. Here, we show that fasting potentiates antibiotic treatment for murine sepsis caused by Salmonella Typhimurium, Klebsiella pneumoniae , and Enterobacter cloacae , resulting in increased bacterial clearance and improved host immune responses and survival. This effect is mediated by fasting-induced ketogenesis and could be alternatively implemented by combination therapy with antibiotics and ketone bodies. We show that the ketone body acetoacetate is an effector that sensitizes bacteria to antibiotic treatment by increasing antibiotic lethality and outer and inner membrane permeability. Our results demonstrate that acetoacetate depletes bacterial amino acids, particularly positively charged amino acids and putrescine, leading to cell membrane malfunctions and redox-related lethality. This study reveals an unrecognized role of ketogenesis in antibiotic treatment and a potential ketone body-based treatment strategy for bacterial sepsis.
研究领域:
微生物学
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医学
·
感染病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 36
·28394-28400
·
IF 3.84
Yunpan Ying,Yuanlong Xiao,Jing Ma,Xiangyu Guo,Hongliang Huang,Qingyuan Yang,Dahuan Liu,Chongli Zhong
Metal–organic frameworks (MOFs) have exhibited promising applications in gas and liquid separation. As a subclass of MOFs, zeolitic imidazolate frameworks (ZIFs) are attracting more and more interest because of their unique thermal and chemical stability. One of the representative ZIFs, ZIF-7, has super-hydrophobic pores, making it a perfect filler in polymer membranes for recovering acetone from fermentation broths. In this study, mixed matrix membranes (MMMs) based on ZIF-7 and polydimethylsiloxane (PDMS) were prepared, which display improved acetone–water total flux and separation factors simultaneously compared with a pure PDMS membrane. The separation factor can reach up to 39.1 with a high flux of 1236.8 g m−2 h−1 at 333 K, which is the highest value among those reported up to now to the best of our knowledge.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10399-10411
·
IF 3.553
Yang Wangyang,Shen Honglie,Min Huihua,Ge Jiawei
The application of TiO 2 acetone monitor is highly limited by the high operating temperature and poor sensitivity. In this work, black TiO 2 (B-TiO 2 ) is produced by Ti 3+ self-doping and is followed by Ag modification to form B-TiO 2 @Ag. It is first demonstrated that the operating temperature and sensitivity of TiO 2 to acetone can be promoted evidently. By introducing a Ti 3+ self-doped layer on the surface of TiO 2 , as observed in TEM images, the band gap of TiO 2 is reduced to 3.01 eV. Ag surface decoration is carried out for the enhancement of electron generation. Optical absorption and the Hall effect results prove that B-TiO 2 @Ag exhibits highest photoelectrical properties. As a result, the B-TiO 2 @Ag gas sensor with a low operating temperature at 250 °C and high response of 68.19 to 50 ppm acetone is realized. The low detection limit of B-TiO 2 @Ag sensor reaches 887 ppb, which provides an applicable way for non-invasive detection of blood glucose.
研究领域:
材料科学
·
传感技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Zhe Jiao,Xiudong Shi,Xiaolin Zhang,Xiaofang Zhao,Yueting Wang,Feng Xu,Jing Zhang
Exhaled biomarker detection as a non-invasive and portable analytical method, holds great potential in the field of point-of-care testing. Acetone exhibited a higher concentration in the exhaled breath of diabetic patients compared to healthy individuals. Therefore, the development of a highly sensitive, easy-to-operate, and portable acetone detection technology can be utilized for the rapid screening of diabetes. A covalent organic framework Eu-COF was synthesized, and its fluorescence can be specifically quenched by acetone based on the mechanism of energy competition. A flexible Eu-COF-based fluorescent film was prepared using polyvinyl alcohol (PVA) as the substrate and suited to a 3D printing device portable device for on-site rapid detection of acetone. The linearity of concentration was ranged from 0.2-8.0 mg/m3, with a detection limit of 0.1 mg/m3 (RSD=8.6%). The accuracy of the device was validated by comparison with the results of GC-MS. Based on F-Test, there were no significant differences between the results of portable device and GC-MS. The Eu-COF-based fluorescent film exhibited comparable response in humid environment as well. The detection device integrated sample collection and testing in one step and directly providing the concentration of acetone exhaled by the patient. It can serve as a rapid screening tool for point-of care, non-invasive diabetes detection.
研究领域:
医学诊断
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Qing Qing,Wenxuan Wu,Xiaoran Tao,Zhuang Ma,Weigang He,Yuheng Tao,Liqun Wang
Aqueous choline chloride/acetone was developed as a green ternary solvent for catalytic conversion of glucose and raw corn stover into 5-HMF. The results illustrated that acidic ChCl solution played a vital role in promoting the tandem isomerization/dehydration reaction of glucose to 5-HMF, while acetone was identified as an efficient extracting solvent to simultaneously remove 5-HMF from the aqueous phase. The composition of the ternary solvent system was found to have a significant impact on the 5-HMF yield, reaction selectivity, and preventing the further degradation of 5-HMF. A competitive 5-HMF yield of 73.3 mol% was achieved from glucose catalyzed by an ultra-low H 2 SO 4 loading of 2 mmol at 190 °C for 10 min in the ternary ChCl-H 2 O-acetone solvent with a mass ratio of 1:2:3. This novel solvent system exhibited good stability, high efficiency, and excellent recyclability, employing in catalytic conversion of both glucose and lignocellulose to produce 5-HMF.
研究领域:
化学工程
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
AQUACULTURE RESEARCH
·
2023
·
IF 2
Chunjing Cai,Zhe Li,Junhua Lu,Ying Wang,Chen Wang,Pengfei Li,Hui Wang,Wu Meng,Jie Chu
The purpose of this study was to investigate the effects of dietary acetoin on Largemouth Bass (Micropterus salmoides). In 45 d of farming, the experimental diets were supplemented with 0%, 0.3%, 0.6%, and 0.9% of acetoin levels, respectively. Results showed that the activities of lipase (LPS), amylase (AMS), and trypsin in fish fed with acetoin at 0.6% displayed the most obvious improvement compared with the other levels of acetoin (). Furthermore, the incorporation of acetoin at 0.3% and 0.6% in Micropterus salmoides diet significantly enhanced the number of beneficial bacteria (such as Cetobacterium) and reduced the number of harmful bacteria (such as Proteobacteria) in the gut flora of Micropterus salmoides. Meanwhile, the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), and catalase (CAT) in the liver of the samples treated with acetoin at 0.6% were significantly higher than the control (), while the content of malondialdehyde (MDA) and the activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in the liver notably decreased with the increase of the addition amount of acetoin (). Furthermore, the contents of IgA, IL-6, and TNF-α and the activity of acid phosphatase (ACP) in the serum of the samples added with acetoin exhibited a concentration-dependent decline compared with the control (). In summary, acetoin had potential feeding attraction effects on Micropterus salmoides, and the most suitable dose of dietary application was 0.6% acetoin, which can effectively improve the physiological characteristics and immune activity of Micropterus salmoides.
研究领域:
水产养殖学
·
动物营养学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 11
·11262-11267
·
IF 1.798
Guo Xuexin,Zhang Jinbao,Ni Mucui,Liu Li,Lian Hongwei,Wang Han
Hollow and porous α-Fe 2 O 3 nanotubes were successfully synthesized by single nozzle electrospinning method followed by annealing treatment. The crystal structures and morphologies of the as-prepared materials were characterized by X-ray diffraction and scanning electron microscopy, respectively. The as-prepared materials were applied to construct gas sensor devices which gas sensing properties were further investigated. The obtained results revealed that porous α-Fe 2 O 3 nanotube gas sensors exhibit a markedly enhanced gas sensing performance compared with hollow α-Fe 2 O 3 nanotube gas sensors, which was about three times higher to 100 ppm acetone at 240 °C. Interestingly, hollow and porous α-Fe 2 O 3 nanotube gas sensors both showed fast response–recovery time and good selectivity, but the porous ones possessed the shorter recovery time. The improved properties could be attributed to the unique morphology of porous nanotubes. Thus, further improvement of performance in metal-oxide-semiconductors materials could be realized by preparation the unique porous structures of nanotubes. Moreover, it is expected that porous metal-oxide-semiconductors nanotubes could be further design as promising candidates for gas sensing materials.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Nature Sustainability
·
2025
·
IF 27.1
Liu Chunxiao,Zhao Jiankang,Tang Hongting,Xue Jing,Xue Weiqing,Li Xu,Li Hongliang,Jiang Qiu,Zheng Tingting,Yu Tao,Zeng Jie,Xia Chuan
The chemical industry faces the pressing issue of managing excess by-products: for example, the phenol sector produces acetone as a by-product in vast quantities exceeding the market demand for acetone. Integrating electrocatalysis and bioengineering offers versatile access to repurposing these by-products into a wide range of valuable commodities. Nevertheless, the lack of suitable intermediate feedstocks prevents smooth integration of the hybrid electro-biosystem. Here we introduce a tandem electro-biosystem that effectively transforms excess acetone from the phenol industry into valuable long-chain compounds using pure isopropyl alcohol (IPA) as an intermediate feedstock. We developed an intercalated ruthenium electrocatalyst that achieves a maximal Faradaic efficiency of 95.6% for acetone-to-IPA conversion, with an IPA partial current density of −240 mA cm −2 . We also showed the complete conversion of acetone to ~100% pure IPA using a bipolar membrane electrode assembly device and intercalated ruthenium. We then metabolically engineered the yeast Saccharomyces cerevisiae , which can directly feed on electrogenerated pure IPA as a carbon source, secreting p -coumaric acid, free fatty acids or lycopene. This work underscores advancements in the repurposing of industrial by-products and highlights opportunities to reshape the traditional chemical industry using electricity.
研究领域:
化学工程
·
生物技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Denghui Huang,Xiaolan Fu,Kaixin Wang,Zicheng Zheng,Liyuan Zhang,Zhizhen Ye,Jie Jiang,Zhong-kang Han,Liping Zhu
Oxygen vacancies play a crucial role in charge transport and surface states in semiconductor metal oxides, significantly influencing various research fields, such as photocatalysis and gas sensor. Developing effective strategies to generate oxygen vacancies and thereby enhance device performance is highly desirable. In this study, we proposed a water-based one-step electrospinning method to introduce hydroxyl groups, leading to the synthesis of Pt-decorated WO3 nanofibers (Pt-WO3(H2O)) with increased oxygen vacancies. Density functional theory calculations revealed that the dissociation energy of W–OH is lower than that of the W–O bonds, promoting the formation of oxygen vacancies via W–OH bond cleavage. These vacancies reduced the adsorption energy of acetone on the WO3 surface, enhancing surface interactions. Consequently, the Pt-WO3(H2O) sensor exhibited an ultrahigh response of 82 to 1.8 ppm acetone at 300 °C, which was about 1 order of magnitude higher than the one fabricated by conventional electrospinning. These findings indicate that water-based electrospinning is an effective technique for generating oxygen vacancies in metal oxide nanofibers. Our high-performance acetone sensor, capable of detecting low concentrations, holds great potential for applications in noninvasive health screening.
研究领域:
材料科学
·
传感器技术
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）