期刊：
Journal of Porous Materials,2022年29(1):63-71 ISSN：1380-2224
通讯作者：
cao, Wenxiu(caowenxiu2007@126.com)
作者机构：
[Cao, Wenxiu] Hunan City Univ, Coll Mat & Chem Engn, Hunan Prov Key Lab Dark Tea & Jin Hua, Yiyang, Peoples R China.;[Li, Youji; Zhuo, Ou] Jishou Univ, Key Lab Mineral Cleaner Prod & Exploit Green Func, Jishou 416000, Hunan, Peoples R China.;[Yuan, Bizhen] Jilin Univ, Zhuhai Coll, Coll Chem Engn & New Energy Mat, Zhuhai 519041, Guangdong, Peoples R China.;[Luo, Wenhao] Chinese Acad Sci, Dalian Inst Chem Phys, CAS Key Lab Sci & Technol Appl Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China.
通讯机构：
[Wenxiu cao] H;Hunan Provincial Key Laboratory of Dark Tea and Jin-hua, College of Materials and Chemical Engineering, Hunan City University, Yiyang, People’s Republic of China
摘要：
Graphene film is promising candidate as free-standing electrodes for potassium-ion batteries (KIBs) owing to its intrinsic nature of mechanical strength and high electrical conductivity. However, its performance is usually restricted by the tightly stacked structure and sluggish insertion/deinsertion K storage mechanism. Herein, a redox-active engineered holey reduced graphene oxide (HRGO) film anode was prepared by using the carboxylic acid functionalized polystyrene (PS-COOH) spheres as the template. The holey ion diffusion network channels and the oxygen functional groups can be optimized during the PS-COOH spheres decomposition process, which largely promote the enhancement of electrochemical performance because the oxygen functional groups can serve as the surface-redox sites increasing surface-driven reactions and holey channels provide more ion-accessible area for K-ion storage. Moreover, the reduction degree of graphene oxide also be simply tuned by changing the annealing temperature, which can improve the K+ bulk intercalation reaction. As a result, the optimized HRGO-900 (HRGO sample obtained at 900 degrees C) films exhibits a superior areal capacity (0.80 mAh cm(-2) at 0.1 mA cm(-2)). The electrode design and construction strategies can be effectively applied in other 2D materials, which exhibits practical applications in energy storage devices. (C) 2020 Elsevier Ltd. All rights reserved.
期刊：
European Food Research and Technology,2021年247(8):1975-1985 ISSN：1438-2377
通讯作者：
Zhang, X.-H.;Qing, X.-D.
作者机构：
[Zhang, Xiao-Hua; Wang, Deguo; Zhang, Ai-Li; Liu, Xue-Jiao; Xiao, Fu-Gang; Guo, Wei-Yun] Xuchang Univ, Henan Key Lab Biomarker Based Rapid Detect Techno, Food & Pharm Coll, Xuchang 461000, Peoples R China.;[Qing, Xiang-Dong] Hunan City Univ, Coll Mat & Chem Engn, Hunan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413049, Peoples R China.;[Liu, Yanhong] ARS, Mol Characterizat Foodborne Pathogens Res Unit, Eastern Reg Res Ctr, USDA, Wyndmoor, PA 19038 USA.
通讯机构：
[Zhang, X.-H.; Qing, X.-D.] H;Henan Key Laboratory of Biomarker Based Rapid-Detection Technology for Food Safety, Food and Pharmacy College, Xuchang University, Xuchang, People’s Republic of China
期刊：
International Journal of Applied Ceramic Technology,2021年18(3):781-791 ISSN：1546-542X
通讯作者：
Xiong, Huiwen;Gan, Xueping
作者机构：
[Gan, Xueping; Xie, Dan; Zhou, Kechao; Li, Zhiyou; Xiong, Huiwen; Wu, Yuxue; Gan, XP] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.;[Xie, Dan] Hunan City Univ, Coll Mat & Chem Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang, Peoples R China.
通讯机构：
[Xiong, HW; Gan, XP] C;Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
关键词：
Core-shell structures;Electroless plating;Microstructure;Ni-coated TiN composite powders;TiN-Ni cermets
摘要：
<jats:title>Abstract</jats:title><jats:p>To solve the poor sinterability and wettability between TiN ceramic and pure metal via using coated composite powders, dense TiN‐Ni cermets with uniform microstructure and fine grains were developed at a low sintering temperature of 1300℃ in this work. TiN powders were firstly activated in a strong acid solution, in order to achieve a step‐like surface; Ni‐coated TiN powders showed an uniform and controllable morphology. Two types of TiN‐Ni cermets based on conventional milled powders and Ni‐coated TiN composite powders were fabricated by spark plasma sintering (SPS), and used for the comparison concerning the sintering behavior, microstructure and related mechanical properties. Results showed that Ni‐coated TiN composite powders helped to improve the sinterability between ceramic and metal, which is rather beneficial to obtain dense TiN‐Ni cermets with homogeneous microstructure and high mechanical properties. Compared to those of conventional TiN‐Ni, the relative density, Rockwell hardness and fracture toughness increased from 84.9% to 96.6%, 80.2 to 84.3, and 10.2MPa·m<jats:sup>1/2</jats:sup> to 14.7MPa·m<jats:sup>1/2</jats:sup>, with a rather low sintering temperature of 1300 ℃, respectively.</jats:p>
摘要：
<jats:p>
For the first time, alternating trilinear decomposition-assisted multivariate curve resolution (ATLD-MCR) was applied to analyse complex gas chromatography–mass spectrometric (GC-MS) data with severe baseline drifts, serious co-elution peaks and slight retention time shifts for the simultaneous identification and quantification of polycyclic aromatic hydrocarbons (PAHs) in aerosols. It was also compared with the classic multivariate curve resolution-alternating least-squares (MCR-ALS) and the GC-MS-based external standard method. In validation samples, average recoveries of five PAHs were within the range from (96.2 ± 6.8)% to (106.5 ± 4.1)% for ATLD-MCR, near to the results of MCR-ALS ((98.0 ± 1.5)% to (106.7 ± 4.3)%). In aerosol samples, the concentrations of pyrene provided by ATLD-MCR were not significantly different from those of MCR-ALS. The other four PAHs including chrysene, benzo[a]anthracene, fluoranthene and benzo[b]fluoranthene were not detected by ATLD-MCR and the GC-MS-based external standard method. The results of figures of merit further demonstrated that ATLD-MCR achieved high sensitivities (8.9 × 10
<jats:sup>4</jats:sup>
to 1.7 × 10
<jats:sup>6</jats:sup>
mAU ml µg
<jats:sup>−1</jats:sup>
) and low limits of detection (0.003 to 0.087 µg ml
<jats:sup>−1</jats:sup>
), which were better than or similar to MCR-ALS, presenting a great choice to deal with complex GC-MS data for the simultaneous determination of targeted PAHs in aerosols.
</jats:p>
期刊：
Journal of Environmental Biology,2021年42(3):582-588 ISSN：0254-8704
作者机构：
Key Laboratory of Key Technologies of Digital Urban-Rural Spatial Planning of Hunan Province, College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan, 413 000, China;Hunan Urban and Rural Ecological Planning and Restoration Engineering Research Center, Hunan City University, Yiyang, Hunan, 413 000, China;College of Materials and Chemical Engineering, Hunan City University, Yiyang Hunan, 413 000, China;Science and Technology Service Center of Hunan Province, Changsha, Hunan, 410 013, China
摘要：
<jats:p>The synthesis of sulfur heterocycles via the construction of C–S bonds has received considerable attention due to their biological value and extensive pharmaceutical application. While diverse sulfurating agents have been developed over the past few decades, in this regard, elemental sulfur, with advantages of low toxicity, odorless nature and chemical stability, has great potential for the construction of diverse sulfur heterocycles through its direct incorporation into the target molecules in a concise way. Direct functionalization of inert C–H bonds can shorten the number of reaction steps and minimize the amount of waste formed. Hence, heteroannulations via direct C–H sulfuration is considered to be an attractive strategy for the synthesis of sulfur heterocycles. In the last few years, a vast array of concise systems have been reported for the synthesis of some valuable sulfur heterocycles such as thiophenes, thienoindoles, thienothiazoles, thiazoles, benzothiazoles, and thiadiazoles through direct C–H sulfuration/annulations with elemental sulfur. These are discussed in detail in this review.</jats:p><jats:p>1 Introduction</jats:p><jats:p>2 Thiophenes</jats:p><jats:p>3 Thienoindoles</jats:p><jats:p>4 Thienothiazoles</jats:p><jats:p>5 Other Fused Thiophenes</jats:p><jats:p>6 Thiazoles</jats:p><jats:p>7 Benzothiazoles</jats:p><jats:p>8 Thiadiazoles</jats:p><jats:p>9 Others</jats:p><jats:p>10 Summary and Outlook</jats:p>
