SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zhiguo Yang,Xingtai Chen,Qiuying Chen,Jiayi Qu,Yujun Guo,Kaiwen Zhou,Tianren Wang,Davoud Dastan,Xiaoning Wang,Feifei Wang,Xiaoming Tan,Xi-Tao Yin,Xiaoguang Ma
In this work, In 2 O 3 nanospheres were synthesized using urea as a carbon template and modified with Co ions. The synthesized materials were characterized using various instruments to obtain information about the elemental composition and morphology of the materials. The results showed that Co ions replaced the lattice position of In ions and synthesized nanospheres aggregated from 20 nm particles. The results of gas sensitivity tests on all the samples showed that the response to 50 ppm n-butanol at 250 °C reached 540 when Co was doped up to 5 at%. In comparison, the sensor showed very low response to benzene gas with good selectivity. The high response of the sensor to n-butanol is due to the increase in vacancy oxygen content and redox reactions due to the multivalent nature of Co ions. The article concludes with a detailed analysis of the sensing mechanism.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yan Li,Mengna Ding,Guoxiang Yang,Lei Wang,Liulin Luo,Yingchun Miao,Yuning Huo
Acinetobacter baumannii ( A. baumannii ) was widely existed in medical wastewater and easily induced infections to threaten the human healthy. We herein reported Ag/CoO-N photocatalyst composites for effective inactivation of A. baumannii . Ag/CoO-N composites were prepared by N-doping to CoO crystal in supercritical fluid followed with photo-reduction of Ag under visible-light irradiation. N-species was incorporated in the crystal structure of CoO, on which uniform Ag nanoparticles were stably deposited. Thus, the satisfactory photocatalytic sterilization of A. baumannii irradiated by visible-light irradiation was attributed to the high capability of light trapping and the efficient separation of photo-charges. Due to photo-induced electrons as the main active species, Ag nanoparticles and CoO-N synergistically realized mineralization of cell membrane, which lead K + ions leak from cell to crack structure of bacteria, the decrease of genetic materials, and the cripple of the self-repair function in bacteria, resulting in the final cell death.
研究领域:
微生物学
·
材料科学
·
医学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Ruizhi Tang,Yang Yu,Jing Dong,Yating Yao,Shujuan Ma,Junjie Ou,Mingliang Ye
In bottom-up strategy, specific enrichment of glycopeptides and phosphopeptides from complicated biological samples is a prerequisite for efficient identifying glycosylation and phosphorylation by mass spectrometry . Although there were a plethora of materials used as either hydrophilic interaction liquid chromatography (HILIC) or immobilized metal affinity chromatography (IMAC) adsorbents, even several bifunctional materials for simultaneous enrichment of glycopeptides and phosphopeptides, most of them are not easily commercialized as many other well-performing adsorbents due to the complicated preparation process. In our case, a one-step modification strategy was developed to prepare bifunctional adsorbents for HILIC and IMAC, employing O -phospho- l -serine as the modifier and poly(GMA- co -EDMA) microspheres, a kind of macroporous adsorption resin (MAR) with epoxy groups , as the matrix. The MARs were directly modified with O -phospho- l -serine under facile condition for HILIC strategy and further chelated with Ti 4+ for IMAC strategy. A total of 522 unique N -glycopeptides and 442 unique N -glycosylation sites mapped to 275 N -glycoproteins was identified from HeLa cell proteins, showing excellent enrichment efficiency in HILIC. Additionally, 3141 unique phosphopeptides were unambiguously identified from 200 μg of digest of HeLa cell proteins, demonstrating great enrichment efficiency in IMAC. Moreover, these materials have been successfully applied in the analysis of multiple biological samples including human serum and milk, demonstrating their feasibility for real sample applications and potential business value.
研究领域:
蛋白质组学
·
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Qinggele Borjihan,Quanfu Yao,Huihui Qu,Haixia Wu,Ying Liu,Alideertu Dong
Antibiotic-resistant bacteria contamination in environments imposes great threats to human life health. This research aims to develop novel targeted antibacterial biochars for achieving high selectivity to kill pathogenic Escherichia coli ( E. coli ). The glycopolymer N -halamine-modified biochars ( i.e ., BCPMA-Cl) were synthesized by the modification of biochars with poly[2-(methacrylamido) glucopyranose- co -acrylamide] (P(MAG- co -AM), followed by chlorination treatment. Based on the results of FTIR, turbidity, XPS, and UV–vis, BCPMA-Cl was successfully synthesized and demonstrated to be able to eliminate Staphylococcus aureus ( S. aureus ) and E. coli. Especially, BCPMA-Cl possessed extremely potent to specific-killing 10 4 CFU∙ml −1 of E. coli with lower hemolytic activity (<5%). Additionally, the antibacterial mechanisms of BCPMA-Cl against bacteria were contact-killing and release-killing contributed by active chlorine ( i.e ., Cl + ). Therefore, this work provided a cost-effective and facile approach for preparation of functional biochars used for bacteria-specific therapeutic applications via livestock pollutants as well as showing a promising strategy to avoid bacterial resistance.
研究领域:
环境科学
·
微生物学
·
材料科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2020
·
IF 3.408
Chi Chen,Zhuye Li,Baoming Xu
The C&N coated Li 2 ZnTi 3 O 8 is synthesized by heat-treating pristine Li 2 ZnTi 3 O 8 and urea (CO(NH 2 ) 2 ) at 400 °C for a short time. The content of the C&N layer of the C&N coated Li 2 ZnTi 3 O 8 is ~3.5 wt% and the N content of 2.06 wt% is achieved. After coupling with a C&N layer, the C&N coated Li 2 ZnTi 3 O 8 delivers a discharge specific capacity of 230.1, 211.9, 197.4, 190.6 and 180.4 mAh g −1 after 10 cycles at the current density of 0.1, 0.5, 1.5, 2.5 and 4.0 A g −1 , respectively, and exhibits a remarkable stability over 400 cycles at 1.5 A g −1 . The effect of the formed C&N layer on the structure and electrochemical properties of the C&N coated Li 2 ZnTi 3 O 8 has been characterized by a series of means.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Suxiang Ma,Junwei Wang,Kui Feng,Hao Zhang,Ziang Wu,Yimei Wang,Bin Liu,Yongchun Li,Mingwei An,Raúl Gonzalez-Nuñez,Rocío Ponce Ortiz,Han Young Woo,Xugang Guo
The development of n-type organic semiconductors critically relies on the design and synthesis of highly electron-deficient building blocks with good solubility and small steric hindrance. We report here a strongly electron-deficient dithienylpyrazinediimide (TPDI) and its n-type semiconducting polymers. The pyrazine substitution leads to the resulting polymers with much lower-lying lowest unoccupied molecular orbital (LUMO) levels and improved backbone planarity compared to the reported dithienylbenzodiimide (TBDI)- and fluorinated dithienylbenzodiimide (TFBDI)-based polymer analogues, thus yielding n-type transport character with an electron mobility up to 0.44 cm2 V–1 s–1 in organic thin-film transistors. These results demonstrate that dithienylpyrazinediimide is a highly promising electron-deficient building block for constructing high-performance n-type polymers and the incorporation of pyrazine into imide-functionalized (hetero)arenes is an effective strategy to develop n-type polymers with deep-lying frontier molecular orbital (FMO) levels for organic optoelectronic devices.
研究领域:
材料科学
·
有机电子学
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2015
·Vol. 33
·期 11
·1618-1624
·
IF 1.835
Hu Wei,Cao Jing,Huang Yi-ling,Liang Sai
The anionic polymerization of N -vinylcarbazole (NVC) by using optically active anionic initiators such as the lithium salts of ( S )-1-(9H-fluoren-2-yl)-4-isopropyl-4,5-dihydrooxazole (( S )-1-FIDH) and ( S )-2-(9H-fluoren-2-yl)-4- isopropyl-4,5-dihydrooxazole (( S )-2-FIDH) and complexes of (-)-Sparteine with n -butylithium (n-BuLi-(-)-Sp) or fluorenyl lithium (FILi-(-)-Sp) was achieved. The yield and specific rotation of poly( N -vinylcarbazole)s (poly(NVC)s) were considerably affected by the molar ratio of ( S )-FIDH to NVC. The highest yield and specific rotation were obtained with Li- ( S )-1-FIDH as an initiator, with a molar ratio of monomer and initiator [M]/[I] = 10/1. The effects of the chiral initiators, type of solvent and the polymerization temperature were investigated. The obtained optical activity of polymers was attributed to asymmetric induction of the chiral initiators.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 34
·2201556
·
IF 15.153
Yuxin Liu,Cailing Chen,Yiqiang He,Zhe Zhang,Mingbian Li,Chunguang Li,Xiao-Bo Chen,Yu Han,Zhan Shi
Design and development of highly efficient photocatalytic materials are key to employ photocatalytic technology as a sound solution to energy and environment related challenges. This work aims to significantly boost photocatalytic activity through rich indium vacancies (V In ) In 2 S 3 with atomic p–n homojunction through a one-pot preparation strategy. Positron annihilation spectroscopy and electron paramagnetic resonance reveal existence of V In in the prepared photocatalysts. Mott–Schottky plots and surface photovoltage spectra prove rich V In In 2 S 3 can form atomic p–n homojunction. It is validated that p–n homojunction can effectively separate carriers combined with photoelectrochemical tests. V In decreases carrier transport activation energy (CTAE) from 0.64 eV of V In -poor In 2 S 3 to 0.44 eV of V In -rich In 2 S 3 . The special structure endows defective In 2 S 3 with multifunctional photocatalysis properties, i.e., hydrogen production (872.7 µmol g −1 h −1 ), degradation of methyl orange (20 min, 97%), and reduction in heavy metal ions Cr(VI) (30 min, 98%) under simulated sunlight, which outperforms a variety of existing In 2 S 3 composite catalysts. Therefore, such a compositional strategy and mechanistic study are expected to offer new insights for designing highly efficient photocatalysts through defect engineering.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Ming Jin,Dan Zhao,Guozhen He,Yao Tong,Shiqing Han
An efficient method has been developed for the N -arylation of a variety of water-soluble amino alcohols (1.2 mmol) with aryl iodides (1.0 mmol) in water under CuI-catalyzed conditions. The reaction was conducted via substrate-promoted action and did not require an additional ligand or phase-transfer catalyst, and afforded the desired N -aryl amines in acceptable to excellent yields (64%–93%) under mild reaction conditions with a small excess of the amino alcohol.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Jun Jiang,Teng Li,Kexin Huang,Guangyu Sun,Jing Zheng,Jinlong Chen,Weiran Yang
As a bio-based platform chemical, it is desirable to convert levulinic acid (LA) to varieties of value-added biochemicals. n-Butane, mainly from nonrenewable fossil resources, is a basic chemical to produce some important chemicals, such as butadiene and ethylene. In this paper, 95.5% yield of n-butane was obtained from LA in one-step over base-treated Pt/C at around 300 °C in 4 h. The reaction pathway was confirmed to be the hydrodeoxygenation of LA to valeric acid (VA) and then the VA decarboxylation to n-butane by kinetic studies. Base-treated Pt/C had better reactivity due to its improved decarboxylation activity. Detailed characterization of the catalyst revealed that the Pt particle size is the key reason for the activity improvement, and further studies showed that Pt nanoparticles with a size of 2–4 nm showed the highest decarboxylation activity. This is the first report on the direct conversion of LA to n-butane.
研究领域:
化学工程
·
可再生资源
·
催化科学
✓ 已验证
DOI
高影响因子
Frontiers of Optoelectronics
·
2017
·Vol. 10
·期 2
·132-137
·
IF 0
Jiang Chen,Zhan Honglei,Zhao Kun,Fu Cheng
The terahertz (THz) time-domain spectroscopy technique was used to characterize the cooling process of solid n -alkanes. The THz waveforms of n -octadecane, n -nonadecane, n -eicosane, n -heneicosane, n -docosane, and n -pentacosane were obtained with the cooling time using the aforementioned noncontact optical method. The peak values of the THz signal were found to be related to the cooling temperature of n -alkanes. The THz wave was sensitive to the size and structure of particles in the liquid; therefore, the crystallization process of n -alkanes was monitored. An empirical equation based on signal attenuation was proposed to quantitatively distinguish the content change of structural order in the samples. Results present a new noncontact optical approach for characterizing wax crystallization via THz time-domain spectroscopy.
研究领域:
化学
·
物理学
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Shuang Xu,Xiaopo Niu,Gang Yuan,Zheyuan Wang,Shuaikang Zhu,Xiaoxue Li,Yunxi Han,Rong Zhao,Qingfa Wang
Electrocatalytic synthesis of valuable biofuels and chemicals from biomass-derived acids is a promising approach, but selectively producing deoxygenated hydrocarbons is still a great challenge. In this work, we investigated selective electrochemical decarboxylation of n-octanoic acid to produce hydrocarbons (n-tetradecane, n-heptane, and n-heptene) in a single electrolytic cell at room temperature. Pt nanoparticles with different morphologies (nanospheres, nanoflowers, and nanothorns) and further Pt nanothorns with different plane distributions on carbon fiber paper (CFP) were fabricated by a controllable electrodeposition method. The results proved that the Pt(311) plane has the best selectivity and intrinsic activity for decarboxylation products, especially for Kolbe hydrocarbons. The Pt(110) plane shows a similar intrinsic activity as the Pt(311) planes. High selectivity (75%), yield (35%), and Faraday efficiency (34%) for hydrocarbons were achieved over the Pt nanothorn (Pt-NT), which were approximately 1.6, 2.3, and 3.3 times that of Pt nanoflowers, Pt nanospheres, and Pt/C, respectively. The high electrocatalytic activity of Pt nanothorns was attributed to its high electrochemically active surface area (ECSA) and enhanced intrinsic activity derived from the high level of Pt(311) and Pt(110) planes.
研究领域:
能源化学
·
催化科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）