Journal of Oleo Science
·
2019
·
IF 1.208
Lixia Hou,Yujin Zhang,Xuede Wang
Sesame paste is used as a condiment in many parts of the world because of its unique flavor. In the study, the volatile compounds and flavor characteristics of sesame pastes processed at different temperatures (140°C - 190°C) were analysed by application of solid phase microextraction - gas chromatography/mass spectrometry analysis, odor activity value evaluation and sensory evaluation. For all the sesame pastes processed at the different temperatures, the pyrazine group had the highest content. The amount of the volatiles increased by 4.15-fold when the roasting temperature increased from 140°C to 180°C, which was mainly attributed to the increase of pyrazines, alkenes, ketones, thiazoles and pentylfuran. And accordingly, sesame paste prepared at 180°C had the highest Odor Activity Value (OAV). Samples differed significantly in terms of aroma and total acceptability (p < 0.05). The sesame paste processed at 180°C had a moderate roasted and sweet aroma, and the highest acceptability, followed by that processed at 170°C. These results can be valuable for manufacturers to adjust the roasting process according to market demand for a particular flavor profile.
研究领域:
食品科学
·
化学分析
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuefei Li,Jiaqi Hou,Dong Wang,Junhao Ma,Weikai Sun,Mingxiao Li,Zhihao Sun,Yulin Liu,Guocheng Liu,Qinghua Yan,Qianwen Wang,Beidou Xi,Huiling Liu,Yanjun Xin
The neomycin fermentation residues (NFR) are a solid waste during neomycin production, possessing high recycling value due to their rich organic content. However, the environmentally friendly use of NFR was hindered by its rigid matrix structure and residual neomycin. In this study, the effect of temperature on the structure and bioresource properties of NFR were investigated. Meanwhile, the effect of temperature on the degradation of residual neomycin, the toxicity of neomycin degradation products, and the safety of NFR were assessed. The results indicated that the content of soluble organic matter was increased by appropriate temperature treatment through the disruption of the rigid matrix structure of the NFR. However, excessively high temperatures led to the mineralization of organic matter. Simultaneously, appropriate temperature facilitated the transformation of organic substances to humic-like acids. The neomycin in NFR was effectively degraded with the increasing temperature, and the degradation efficiency exceeded 99 % under 220 °C for 120 min. In addition, the applicability of using appropriate temperatures to degrade antibiotics in similar other AFR has been demonstrated. Neomycin degradation occurred primarily through the cleavage of the glycosidic bond and ring ether, the detachment of the amino group, and the addition of hydroxyl groups. Meanwhile, the developmental toxicity and acute toxicity of neomycin were effectively mitigated by the appropriate temperature, and a significant reduction in ecotoxicity was observed. As a result, optimum temperature treatment proved to be an efficient method for the secure recycling of NFR.
研究领域:
环境科学
·
微生物学
·
药理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xuping Liu,Jihuai Wu,Guodong Li,Qiyao Guo,Zeyu Song,Yuqian Yang,Xiaobing Wang,Zhang Lan,Jianming Lin
Titania (TiO2) has wide applications in the realm of perovskite solar cells (PSCs). Because high-temperature processing severely limits the application of flexible and tandem devices, it is significant to develop a high-quality electron-transport layer (ETL) by low-temperature processing. Here, we design a new strategy by introducing a bifunctional molecule (thioacetamide, TAA) in the TiO2 ETL. During the low-temperature annealing, the N and S atoms in TAA can bond with the Ti atom in the ETL and the Pb atom in the perovskite (PVK) layer, respectively. The formation of coordinate bonds is beneficial to increase the crystallinity and reduce the roughness of TiO2 ETLs and PVK layers, which effectively passivate the defects. Meanwhile, the energy level matching between the ETL and PVK is optimized. The structure characterization and electrochemical measurement demonstrate the design. Compared with precursor doping, surface spin-coating is a more effective method for introducing TAA into TiO2. Significantly, the PSC based on the surface spin-coated TAA TiO2 ETL achieves the best power conversion efficiency (PCE) of 21.17%. Nevertheless, the PSC fabricated with the pristine TiO2 ETL offers a PCE of 19.52% under the same conditions. The results demonstrate a novel method for optimizing the properties of PSCs.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
OPTIK
·
2024
·
IF 3.1
Song-Hyok Kim,Kyong-Su Sonu,Pyol Kim,Jin-Hyok Ri,Kwon-Il Ryu,Chol-Il So,Sol-Gwang An,Il-Bok Choe
Recently, hole-conductor-free perovskite solar cells (PSCs) with carbon counter electrode (CCE) have attracted great attention for its high stability and low fabrication cost. Furthermore, it would lower the cost and simplify the manufacturing process of PSCs by low temperature processing instead of high temperature sintering for fabrication. In this case, however, it is very important to improve the interfacial contact between perovskite layer and CCE. In this work, we for the first time introduce solid-gas reaction between dimethylammonium lead iodide (DMAPbI 3 ) in solid state under carbon layer and methylamine (MA) gas passed through CCE which is formed at low temperature of 120 ℃. Based on Brunauer-Emmett-Teller (BET) measurement and XRD analysis , it is found that MA gas can pass through our low-temperature CCE and perovskite crystals could be successfully formed by the reaction with DMAPbI 3 . In this case, due to the existence of liquid crystal intermediate state and volume expansion, interfacial contact would become better and the charge transfer and recombination characteristics have improved considerably. The best performance devices based on optimized MA gas treatment time exhibit higher efficiency of 12.4% than that of PSCs fabricated by conventional ways with low-temperature processed CCE (9.6%).
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Qiyao Guo,Jihuai Wu,Yuqian Yang,Xuping Liu,Weihai Sun,Yuelin Wei,Zhang Lan,Jianming Lin,Miaoliang Huang,Hongwei Chen,Yunfang Huang
Metal amine halide perovskite solar cells (PSCs), as a promising next generation photovoltaic device , have undergone an unexpected swift growth in the past decade. However, the practical application of PSCs is still facing the challenge of improving efficiency and stability, and the interfacial defects at mesoporous scaffolds is the crucial bottleneck need to be solved. Here, to heal defects and enhance performance, we implement four advantageous designs, i.e. low-temperature processing, rare-earth ion doping, brookite TiO 2 scaffolds, and SnO 2 blocking layer. As a result, the binder-free and sinter-free processing generates a single crystalline phase , evenly distributed, mesoporous Sc 3+ doped brookite TiO 2 scaffold, which induces a uniform coverage, void-less and high-quality perovskite layer. The favorable energy level alignment, diminished defects and carrier recombination improve the performance of the device. Consequently, the PSC based on Sc 3+ tailored brookite TiO 2 scaffold achieves a power conversion efficiency of 21.75% with hysteresis-free and excellent UV stability.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Quan-Yong Cheng,Xiao-Li Zhao,Yun-Xuan Weng,Yi-Dong Li,Jian-Bing Zeng
Traditional superhydrophobic materials for oil/water separation not only depend on nonrenewable feedstocks but also lead to secondary environmental pollutions after discarding, due to the presence of inorganic nanoparticles and toxic fluorine-containing chemicals. Herein, we report a fully sustainable, nanoparticle-free, and fluorine-free superhydrophobic cotton fabric (CF) fabricated via an eco-friendly method, that is, roughness creation by enzyme etching followed by surface coating with an epoxidized soybean oil thermoset and subsequent low surface energy modification with stearic acid. The superhydrophobic CF exhibited excellent durability with surface superhydrophobicity surviving from mechanical abrasion, tape peeling, ultrasonication, chemical resistance, and low/high temperature treatment, due to the enzyme etching-induced stable surface structure with covalently linked low-energy substance. The superhydrophobic CF showed excellent oil/water separation performance with a high separation efficiency and high oil flux. With outstanding mechanical robustness, chemical and environmental resistances, and excellent oil/water separation performance, the fully sustainable superhydrophobic CF can be applied as an environmentally friendly substitute to nonrenewable and harmful chemicals containing oil/water separation materials.
研究领域:
材料科学
·
环境科学
·
化学工程
·
纺织工程
✓ 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）