检索结果-南通市图书馆

Direct synthesis of a disinfectant with fresh scent of green plants by semi-hydrogenation of alkynol on Pd single-atom catalysts

引用

Nano Research 2024年第5期17卷 3872-3878页

作者： Yan Jiang Xuetong Yu Yuxia Ji Xunzhu Jiang Yalin Guo Tianbo Li Liang Gao Rui Lang yanxiong fang Botao Qiao Jinxiang Dong School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116024China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery Guangzhou 510006China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China

Alcohol-based disinfectants have protected people in the coronavirus disease 2019(COVID-19)pandemic,but olfactory stimuli of ethanol may evoke unpleasant memories associated with stressful situations in the devastating infectious disease.The smell of ethanol in household cleaning and disinfectant products can be covered up by the fragrance additives,and 3-hexenol is especially appreciated for the characteristic,strong odor of green plants.Industrial production of 3-hexenol relies on the selective hydrogenation of 3-hexyn-1-ol,where Lindlar catalyst is normally used for the superior selectivity.Although achieving such catalytic transformation in ethanol solution seems as a direct way to produce a disinfectant with green aroma,a popular consumer product in the post-COVID era,severe leaching of toxic Pb hinders Lindlar catalyst as a promising candidate.We find that the Fe_(2)O_(3) supported Pd single-atom catalyst is highly selective to fulfill semi-hydrogenation of 3-hexyn-1-ol in 75%ethanol,and the aforementioned household product is readily generated after filtrating the stable,solid catalyst out of reaction solution.Single-atom catalysts have been frequently utilized for fine-chemical synthesis,while in this work they make stunning debut in practical manufacture of daily used products.

关键词： single-atom catalysis hydrogenation fragrance household product coronavirus disease 2019(COVID-19)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Enhanced ortho-selective t–butylation of phenol over sulfonic acid functionalized mesopore MTW zeolites

引用

中国化学工程学报:英文版 2023年第8期60卷 1-7页

作者： Baoyu Liu Feng Xiong Jianwen Zhang Manna Wang Yi Huang yanxiong fang Jinxiang Dong School of Chemical Engineering and Light Industry Guangdong Provincial Key Laboratory of Plant Resources BiorefineryGuangzhou Key Laboratory of Clean Transportation Energy ChemistryGuangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China School of Engineering Institute for Materials&ProcessesThe University of EdinburghRobert Stevenson RoadEdinburgh EH93FBUnited Kingdom

Novel organo-inorganic hybrid materials(MTW-x-SO_(3)H) have been fabricated by immobilizing 3-mercap topropyltriethoxysilane onto mesopore MTW zeolites, which is treated via a simple oxidation process with hydrogen peroxide as the oxidant to transform sulfhydryl group into sulfonic acid group. The organic sulfhydryl groups are covalently bonded to the external surface of MTW zeolites through the condensation between siloxane arising from organic fragments with silanol groups on the surface of MTW zeolites, the hybrids contain sulfonic acid group within the external surface of MTW zeolites and an opened mesoporous system in the matrix of MTW zeolites, which provide enough accessible Brùnsted acid sites for the alkylation between phenol with tert-butyl alcohol. Through this methodology it's possible to prepare multifunctional materials where the plenty of mesopores are benefit for the introduction of larger numbers of sulfonic acid groups that contributes to activity during reactions, resulting in high activity(>55%) of MTW-4-SO_(3)H and desired selectivity(>56%) of 2-TBP(2-tert-butyl phenol) in the alkylation between phenol with tert-butyl alcohol.

关键词： MTW Zeolites Acidity Catalysis Alkylation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lacunary silicotungstic heteropoly salts as high-performance catalysts in oxidation of cyclopentene

引用

Chinese Journal of Chemical Engineering 2023年第4期56卷 152-159页

作者： Peiyin Chen yanxiong fang Kaihong Xie Yao Chen Yang Liu Hongliang Zuo Weijian Lu Baoyu Liu School of Chemical Engineering and Light Industry Guangdong Provincial Key Laboratory of Plant Resources BiorefineryGuangzhou Key Laboratory of Clean Transportation Energy ChemistryGuangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China Guangdong Xinhuayue Petrochemical Group Stock Company No.18Youcheng 4 RoadMaoming 525000China

The development of polyoxometalates for olefin oxidation is critical to achieving the green chemical process of the C5 fraction further processing.Di-lacunary silicotungstic anions were easily obtained by continuously adjusting the p H instead of the traditional step-by-step method,which exhibited excellent performance in the catalytic oxidation of cyclopentene(CPE)to aldehydes or alcohols.The 93.69%CPE conversion and 97.15%total product selectivity(41.38%for glutaraldehyde(GA)and 55.77%for 1,2-cyclopentanediol(1,2-diol)were achieved by using H_(2)O_(2)as the oxidant and acetonitrile as the solvent.Through complementary characterization,it was found that the optimized di-lacunary silicotungstic polyoxometalate retained a complete Keggin structure,and exhibited better catalytic activity and stability than the mono-lacunary or saturated silicodecatungstate because it exposed more catalytic active centers.Furthermore,in situ FT-IR spectra was utilized to monitor the reaction process,revealing the formation of the active species W(O_(2))on the di-lacunary silicotungstic polyoxometalate and the intermediate epoxycyclopentane during the catalytic oxidation of cyclopentene.

关键词： Lacunary silicotungstic heteropoly salts Cyclopentene(CPE) Catalytic oxidation Glutaraldehyde(GA) 1,2-Cyclopentanediol(1,2-diol)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Controlled release and enhanced antibacterial activity of salicylic acid by hydrogen bonding with chitosan

引用

中国化学工程学报：英文版 2016年第3期24卷 421-426页

作者： Zujin Yang yanxiong fang HongbingJi School of Chemistry and Chemical Engineering The Key Laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong ProvinceSun Yat-sen UniversityGuangzhou 510275China Huizhou Research Institute Huizhou 516216China Faculty of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

Microcapsules of salicylic acid(SA)with chitosan were prepared by spray drying method.Various analytical methods were used to characterize the nature of microcapsules.Fourier-transform infrared spectroscopy(FTIR)confirmed the presence of intermolecular interactions between chitosan and SA.Particle size analysis showed that the average size of microcapsules ranged from 2 to 20 μm.Scanning electron microscopy(SEM)studies indicated that the microspheres were spherical and had a relatively smooth surface.Microbiological assay of antibacterial activity for SA and its microcapsules was measured using different bacterial strains.It was found that the antibacterial activity of SA was improved after the formation of microcapsules.The in vitro release profile showed that the microcapsules could control SA release from 1 h to 4 h.Kinetic studies revealed that the release pattern follows Korsmeyer–Peppas mechanism.Enhanced antibacterial activity of the SA microcapsules was attributed to the synergistic effects of intermolecular hydrogen-bonding interactions N–H?O and O–H?O_C between SA and chitosan.It was also confirmed by quantum chemical calculation.

关键词：氢键相互作用抗菌活性水杨酸壳聚糖分子间相互作用傅里叶变换红外光谱傅立叶变换红外光谱扫描电子显微镜

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Inhibition of lithium dendrites and dead lithium by an ionic liquid additive toward safe and stable lithium metal anodes

引用

Chinese Chemical Letters 2022年第8期33卷 3951-3954页

作者： Shengjie Zhang Bin Cheng yanxiong fang Dai Dang Xin Shen Zhiqiang Li Ming Wu Yun Hong Quanbing Liu Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China Department of Chemical Engineering Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyTsinghua UniversityBeijing 100084China

The uncontrolled growth of lithium dendrites and accumulation of"dead lithium"upon cycling are among the main obstacles that hinder the widespread application of lithium metal anodes.Herein,an ionic liquid(IL)consisting of 1-methyl-1-propylpiperidinium cation(Pp_(13)^+) and bis(fluorosulfonyl)imide anion(FSI^(-)),was chosen as the additive in propylene carbonate(PC)-based liquid electrolytes to circumvent the shortcoming of lithium metal anodes.The optimal 1%Pp_(13) FSI acts as the role of electrostatic shielding,lithiophobic effect and participating in the formation of solid electrolyte interface(SEI)layer with enhanced properties.The in-situ optical microscopy records that the addition of IL can effectively inhibit the growth of lithium dendrites and the corrosion of lithium anode.This study delivers an effective modification to optimize electrolytes for stable lithium metal batteries.

关键词： Ionic liquid Piperidinium Lithium metal anode Solid electrolyte interface Lithium dendrites Dead lithium

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modification of pillared MFI zeolite nanosheets by nitridation with tailored activity in benzylation of mesitylene and benzyl alcohol

引用

Chinese Journal of Chemical Engineering 2019年第8期27卷 1981-1987页

作者： Zhipeng Chen Jiajin Huang Qiaowen Mu Huiyong Chen Feng Xu yanxiong fang Baoyu Liu School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China School of Chemical Engineering Northwest UniversityXi'an 710069China School of Environment and Chemical Engineering Foshan UniversityFoshan 528000China

The modification of pillared MFI zeolites was performed by nitridation of silica pillared MFI zeolite nanosheets under NH3 atmosphere with different time. The resultant zeolites were characterized by a complementary combination of X-ray power diffraction(XRD), scanning electron microscopy(SEM),transmission electron microscopy(TEM), pyridine-IR spectroscopy and N2 adsorption–desorption isotherms. The analyses showed that the nitridation didn’t destroy the crystallinity and specific surface area of zeolites, and the acidity of zeolites can be tailored by tuning the time of nitridation, resulting in the different concentration ratios of Br?nsted-to-Lewis(B/L) acid sites. Moreover, the nitrided zeolites exhibited high selectivity to 2-benzyl-1,3,5-trimethylbenzene than parent silica pillared MFI zeolite nanosheets in benzylation of mesitylene with benzyl alcohol. A balance between Br?nsted acid sites and Lewis acid sites can inhibit the self-etherification of benzyl alcohol and enhance the selectivity of alkylated product. These experimental data implied that nitridation was an effective method to modulate the acidity of zeolites and the synergy between Br?nsted acid sites and Lewis acid sites was a decisive factor to determine the selectivity.

关键词： MFI zeolite Pillar Nitridation Benzylation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ionic liquid mediated esterification of alcohol with acetic acid

引用

Frontiers of Chemical Science and Engineering 2009年第2期3卷 211-214页

作者： Beilei ZHOU yanxiong fang Hao GU Saidan ZHANG Baohua HUANG Kun ZHANG Faculty of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510090China

Highly efficient esterification of alcohols with acetic acid by using a Brønsted acidic ionic liquid,i.e.,1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO_(4)),as catalyst has been realized.The turnover numbers(TON)were able to reach up to 11000 and turnover frequency(TOF)was 846.The catalytic system is suitable for the esterification of long chain aliphatic alcohols,benzyl alcohol and cyclohexanol with good yields of esters.The procedure of separating the product and catalyst is simple,and the catalyst could be reused.[Hnmp]HSO_(4) had much weaker corrosiveness than H_(2)SO_(4).The corrosive rate of H_(2)SO_(4) was 400 times more than that of[Hnmp]HSO_(4) to stainless steel.

关键词： ionic liquid Brønsted acid esterification catalyst

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

酿酒条件对本土酒酒球菌合成组胺的影响

引用

中外葡萄与葡萄酒 2024年第3期 75-82页

作者：张健方艳李俊娥贺子恺陈彦雄甘肃祁连葡萄酒业有限公司甘肃高台734304 甘肃农业大学食品科学与工程学院甘肃兰州730070

为探究不同酿酒条件对本土酒酒球菌合成组胺的影响,以灭菌的‘赤霞珠’葡萄汁为原料,采用酒酒球菌同时接种和顺序接种方式,调查不同酿造条件(初始pH、温度以及SO_(2)添加量)对本土酒酒球菌组胺合成的影响。结果表明,葡萄酒的酒精发酵(AF... 详细信息

为探究不同酿酒条件对本土酒酒球菌合成组胺的影响,以灭菌的‘赤霞珠’葡萄汁为原料,采用酒酒球菌同时接种和顺序接种方式,调查不同酿造条件(初始pH、温度以及SO_(2)添加量)对本土酒酒球菌组胺合成的影响。结果表明,葡萄酒的酒精发酵(AF)和苹果酸-乳酸发酵(MLF)过程均有组胺生成;本土菌株GF-2和QL-9在同时接种和顺序接种的MLF过程中,各初始pH发酵条件下产生的组胺含量均低于商业菌株VP41;各菌株在20℃进行MLF时,酒样中组胺含量均显著低于25℃处理组。在同时接种模式下,SO_(2)添加量为50 mg·L^(-1)时,本土菌株GF-2和QL-9发酵酒样中的组胺含量最低。该研究结果可为确定本土酒酒球菌的适宜酿酒条件提供技术支持。

关键词：酿造条件酒酒球菌葡萄酒苹果酸-乳酸发酵组胺

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Engineering HOF‑Based Mixed‑Matrix Membranes for Efficient CO_(2) Separation

引用

Nano-Micro Letters 2023年第4期15卷 76-84页

作者： Yuhan Wang yanxiong Ren Yu Cao Xu Liang Guangwei He Hanze Ma Hongliang Dong Xiao fang Fusheng Pan Zhongyi Jiang Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350People’s Republic of China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192People’s Republic of China Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center Jieyang 522000Guangdong ProvincePeople’s Republic of China Center for High Pressure Science and Technology Advanced Research PudongShanghai 201203People’s Republic of China

Hydrogen-bonded organic frameworks(HOFs)have emerged as a new class of crystalline porous materials,and their application in membrane technology needs to be explored.Herein,for the first time,we demonstrated the utilization of HOF-based mixed-matrix membrane for CO_(2) separation.HOF-21,a unique metallo-hydrogen-bonded organic framework material,was designed and processed into nanofillers via amine modulator,uniformly dispersing with Pebax polymer.Featured with the mix-bonded framework,HOF-21 possessed moderate pore size of 0.35 nm and displayed excellent stability under humid feed gas.The chemical functions of multiple binding sites and continuous hydrogen-bonded network jointly facilitated the mass transport of CO_(2).The resulting HOF-21 mixed-matrix membrane exhibited a permeability above 750 Barrer,a selectivity of~40 for CO_(2)/CH_(4) and~60 for CO_(2)/N_(2),surpassing the 2008 Robeson upper bound.This work enlarges the family of mixed-matrix membranes and lays the foundation for HOF membrane development.

关键词： Hydrogen-bonded organic framework Tunable size Mixed-matrix membrane Mixed-bond Carbon capture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rational design of a new type ionic liquid-based electrolyte for high performance lithium-ion battery

Rational design of a new type ionic liquid-based electrolyte...

引用

中国化学会第三届中国能源材料化学研讨会

作者： Shengjie Zhang Junhao Li yanxiong fang Quanbing Liu Dai Dang School of Chemical Engineering and Light Industry Guangdong University of Technology

＜正＞Lithium-ion batteries（LIB） are widely used in mobile electronic devices,electric vehicles,and energy storage power stations due to their high working voltage,high specific energy and specific power,low self-di...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：