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Green Energy & Environment 2022年第1期7卷 165-171页

作者： Yinhua yan Huiqin Guo Kexin Li liushui yan Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle NanChang Hangkong UniversityNanChang330063China National-Local Joint Engineering Research Center of Heavy Metals Polluants Control and Resource Utilization NanChang Hangkong UniversityNanChang330063China

In this paper,sulfonic groups functionalized annealed bio-based carbon microspheres loaded polytetrafluoroethylene(A-BCMSs-SO_(3)H@PTFE)fibers with high activity,high stability,and easy regeneration were successfully fabricated by a simple method using low-cost raw materials.The characterization results showed that the annealed biomass carbon microspheres derived from waste Camellia oleifera shells were evenly distributed on the polytetrafluoroethylene fibers and the sulfonic groups can be successfully loaded on the surface of annealed biomass carbon microspheres by room temperature sulfonation.Subsequently,the as-prepared A-BCMSs-SO_(3)H@PTFE fibers were applied to the acidcatalyzed synthesis of liquid biofuel 5-ethoxymethylfurfural.The catalytic experiment results indicated that the annealing temperature and time during catalyst preparation have a significant effect on the activity and selectivity of A-BCMSs-SO_(3)H@PTFE fibers.The results of catalytic reaction kinetics showed that the yield of 5-ethoxymethylfurfural can reach more than 60%after 72 h of acid-catalyzed reaction.The stability test showed that the as-prepared A-BCMSs-SO_(3)H@PTFE fibers still maintained a stable acid catalytic activity after four recycles.

关键词： Acid catalysis Waste Camellia oleifera shells Sulfonic groups Polytetrafluoroethylene fibers 5-Ethoxymethylfurfural

One-step fabrication of mesoporous sulfur-doped carbon nitride for highly selective photocatalytic transformation of native lignin to monophenolic compounds

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Chinese Chemical Letters 2023年第1期34卷 440-445页

作者： Conghao Ku Huiqin Guo Kexin Li Qiong Wu liushui yan Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource utilization Nanchang Hangkong UniversityNanchang 330063China Jiangxi Provincial Experimental Teaching Demonstration Center of Environmental Science and Engineering Nanchang Hangkong UniversityNanchang 330063China

Photocatalytic selective transform native lignin into valuable chemicals is an attractive but challenging task.Herein,we report a mesoporous sulfur-doped carbon nitride(MSCN-0.5)which is prepared by a facile one-step thermal condensation strategy.It is highly active and selective for the cleavage Cα-Cβbond inβ-O-4 lignin model compound under visible light radiation at room temperature,achieving 99%substrate conversion and 98%Cα-Cβbond cleavage selectivity.Mechanistic studies revealed that the Cβ-H bond of lignin model compounds activated by holes and generate key Cβradical intermediates,further induced the Cα-Cβbond cleavage by superoxide anion radicals(·O2-)to produce aromatic oxygenates.Waste Camellia oleifera shell(WCOS)was taken as a representative to further understand the reaction mechanisms on native lignin.33.2 mg of monophenolic compounds(Vanillin accounted for 22%and Syringaldehyde for 34%)can be obtained by each gram of WCOS lignin,which is 2.5 times as that of the pristine carbon nitride.The present work offers useful guidance for designing metal-free heterogeneous photocatalysts for Cα-Cβbond cleavage to harvest monophenolic compounds.

关键词： Mesostructure Sulfur-doped carbon nitride Photocatalysis Lignin model compound Native lignin Monophenolic compounds

Fabrication of biobased heterogeneous solid Br?nsted acid catalysts and their application on the synthesis of liquid biofuel 5-ethoxymethylfurfural from fructose

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Green Energy & Environment 2018年第4期3卷 384-391页

作者： Yingying Wen Zhou Yu Kexin Li Huiqin Guo Yuhua Dai liushui yan Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University

A series of biobased heterogeneous solid Br?nsted acid catalysts with perfect spherical microstructures are successfully fabricated directly from waste Camellia oleifera shells by a simple hydrothermal carbonization-annealing-sulfonation process. 350℃ low temperature annealing process helps to increase the activity of the catalyst due to the simultaneous maintenance of the spherical microstructure and aromatic carbon framework. As a renewable catalyst with low cost, the as-prepared materials are successfully applied on the synthesis of green renewable liquid biofuel 5-ethoxymethylfurfural(EMF) directly from fructose. In the catalytic test, the influences of reaction time and temperature, fructose concentration, and adding amount of the catalyst on the yield of EMF are investigated systematically. As a result, the optimal reaction temperature is 100℃, the EMF yield monotonically increases with prolonging the reaction time from 3 to 24 h, the optimal fructose concentration is0.5 mmol, and the EMF yield gradually increases with increasing the adding amount of the catalyst from 50 to 150 mg. In addition, the asprepared catalysts exhibit considerably high stability in the current EMF synthesis system, and they can maintain a similar level of reactivity after four catalytic cycles.

关键词： Hydrothermal carbonization Annealing Sulfonation 5-Ethoxymethylfurfural Fructose

DETERNINATION OF MELAMINE IN EGGS BY MICROWAVE –ASSISTED EXTRACTION AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY

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DETERNINATION OF MELAMINE IN EGGS BY MICROWAVE –ASSISTED EX...

固相萃取-液相色谱-离子阱二级质谱法同时测定饮用水中多种痕量有机污染物

第十三届北京分析测试学术报告会暨展览会(BCEIA2...

作者： liushui yan Xin JIANG Xubiao LUO Rong Rong SHI College of Environmental and Chemical Engineering Nanchang Hangkong University

＜正＞The determination of melamine includes several analytical steps depending on the complexity of matrix,with sample pre-treatment,extraction,clean-up and detection as the common sequence.Separation,identification,and quantification of melamine are usually performed using chromatographic techniques.Gas chromatography/mass spectrometry,liquid chromatography,

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化学通报 2010年第9期73卷 850-853页

作者：颜流水江鑫曹群黄燕南昌航空大学环境与化学工程学院南昌330063

建立了高效液相色谱-离子阱二级质谱法同时测定饮用水中内分泌干扰物、农药残留和丙烯酰胺等15种痕量有机污染物的方法。250mL水样先用C18固相萃取柱富集,经梯度洗脱液相色谱分离,采用时间分段的方法确定各组分质谱检测条件,利用离子阱... 详细信息

建立了高效液相色谱-离子阱二级质谱法同时测定饮用水中内分泌干扰物、农药残留和丙烯酰胺等15种痕量有机污染物的方法。250mL水样先用C18固相萃取柱富集,经梯度洗脱液相色谱分离,采用时间分段的方法确定各组分质谱检测条件,利用离子阱二级质谱进行测定。所检测的15种有机污染物定量线性关系良好,相关系数为0.9975～0.9998,检测限在0.2～20ng/L之间。在低、中、高3个不同加标水平下,实际水样的加标回收率为75.1%～99.5%,相对标准偏差为4.6%～12.3%。该方法成功用于5种不同来源饮用水样的检测,获得了满意结果。

关键词：液质联用离子阱二级质谱内分泌干扰物饮用水多残留分析同时测定

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纳米氧化铜催化化学发光性能及其氨基酸检测

分析化学 2005年第6期33卷 847-849页

作者：刘科辉颜流水罗国安南昌航空工业学院环境与化学工程系南昌330034 清华大学化学系清华大学化学系北京100084

用低热固相配位化学反应制得纳米氧化铜并对其进行了透射电镜和X射线衍射表征,得到的纳米氧化铜平均粒径为10nm。用制得的纳米氧化铜催化精氨酸和天冬氨酸的鲁米诺化学发光体系,催化性能较分析纯氧化铜和硫酸铜溶液分别提高了5.65和4.5... 详细信息

用低热固相配位化学反应制得纳米氧化铜并对其进行了透射电镜和X射线衍射表征,得到的纳米氧化铜平均粒径为10nm。用制得的纳米氧化铜催化精氨酸和天冬氨酸的鲁米诺化学发光体系,催化性能较分析纯氧化铜和硫酸铜溶液分别提高了5.65和4.51倍。氨基酸的检出限达10-9mol/L。

关键词：氨基酸鲁米诺化学发光纳米氧化铜

介孔电气石/TiO_2复合材料的制备及其模拟太阳光光催化性能

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复合材料学报 2014年第6期31卷 1481-1489页

作者：熊晶晶李可心黄黎明颜流水南昌航空大学环境与化学工程学院南昌330063

采用一步溶胶-凝胶共缩合结合溶剂热合成技术制备出一系列介孔电气石/TiO2复合材料,表征了复合材料的相结构、形貌、孔隙率、光吸收性质以及组成结构。结果表明:制备的电气石/TiO2复合材料具有纯锐钛矿晶相、均匀的介孔结构、较大的比... 详细信息

采用一步溶胶-凝胶共缩合结合溶剂热合成技术制备出一系列介孔电气石/TiO2复合材料,表征了复合材料的相结构、形貌、孔隙率、光吸收性质以及组成结构。结果表明:制备的电气石/TiO2复合材料具有纯锐钛矿晶相、均匀的介孔结构、较大的比表面积(205~242m2·g-1)、均匀的孔径分布(3.4~3.8nm)以及较低的带隙能(3.0eV)。在模拟太阳光照射下,电气石/TiO2复合材料可以被成功地应用于水中有机污染物罗丹明B和诺氟沙星的降解。降解动力学研究表明:电气石的掺杂提高了TiO2的光催化量子效率,降低了TiO2的带隙能。对罗丹明B的降解,电气石掺杂量为1wt%~5wt%的电气石/TiO2复合材料表现出比纯TiO2更高的降解速率,对诺氟沙星的降解,电气石/TiO2复合材料的降解速率高于纯TiO2的。

关键词：电气石 TiO2 光催化降解溶胶-凝胶溶剂热合成罗丹明B 诺氟沙星

Effect of static magnetic field on activity of immobilized α-amylase

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Chinese Science Bulletin 1997年第2期42卷 127-130页

作者： yan liushui, ZHU Yuanbao, HE-Shuang’e and CAO Zhixiang1 Department of Chemical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China 2. Department of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China Department of Chemical Engineering Nanchang Institute of Aenwututical Techndogy Nanchang China Department of Chemistry and Chemical Engineering Hunan University Changsha China

BIOLOGICAL effect of magnetic field is one of the three major subjects of contemporary biomagnetism, and is also the basis of applied biomagnetism. In order to explore magnetic biological effects, the influence of various sorts of magnetic field on many living systems as well as their different constructural levels has been extensively studied. However, only a few studies with in vitro enzyme have been reported, and few researches concerning the influence of magnetic field on immobilized enzyme reactions have been published. This note describes

关键词： static magnetic field immobilized α-amylase enzyme activity oscillatory behaviour.

阳离子表面活性剂改性油茶果壳对水溶液中甲基橙的吸附

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环境工程学报 2016年第2期10卷 669-675页

作者：郭会琴宋冬阳颜流水李可心南昌航空大学环境与化学工程学院生态诊断修复与污染阻断技术重点实验室南昌330063

以阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)对油茶果壳进行改性,制备CTAB-油茶果壳(CTABCOS)吸附材料,并采用批实验法对其对水溶液中甲基橙的吸附去除进行了研究。考察了溶液p H、吸附剂用量和离子强度等对水溶液中甲基橙的吸附影响... 详细信息

以阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)对油茶果壳进行改性,制备CTAB-油茶果壳(CTABCOS)吸附材料,并采用批实验法对其对水溶液中甲基橙的吸附去除进行了研究。考察了溶液p H、吸附剂用量和离子强度等对水溶液中甲基橙的吸附影响,并研究了体系的吸附动力学和吸附热力学特征。结果表明,向100 m L浓度为50 mg/L的甲基橙溶液中加入0.40 g CTAB-COS,在最佳实验条件下,CTAB-COS对甲基橙的去除率可达96.66%。溶液离子强度增大,甲基橙去除率降低。CTAB-COS对甲基橙的吸附行为符合拟二级动力学模型,吸附等温线可用Langmuir模型进行较好拟合,在20℃时最大吸附量为18.31 mg/g。吸附热力学结果表明,吸附过程为可自发进行的放热过程。再生性实验结果表明,再生6次后,CTAB-COS对甲基橙的吸附去除率仍可达到80%。该改性油茶果壳可应用于阴离子型染料废水的吸附法处理。

关键词：油茶果壳十六烷基三甲基溴化铵甲基橙生物吸附

原位光还原法制备高分散铂沉积多孔氮化碳复合材料及其降解水中4-氟苯酚的高效可见光光催化活性（英文）

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Chinese Journal of Catalysis 2017年第1期38卷 29-38页

作者：曾振兴李可心魏凯戴玉华颜流水郭会琴罗旭彪南昌航空大学江西省持久性污染物控制与资源循环利用重点实验室江西南昌330063

作为一种新型水中有机污染物,有机氟化物中C–F共价键的键能较大,因而很难通过传统的可见光光催化剂降解.因此,开发高效可见光光催化剂是实现在可见光照射下成功降解水中有机氟化物的关键.作为一种非金属半导体光催化剂,石墨相氮化碳(g-... 详细信息

作为一种新型水中有机污染物,有机氟化物中C–F共价键的键能较大,因而很难通过传统的可见光光催化剂降解.因此,开发高效可见光光催化剂是实现在可见光照射下成功降解水中有机氟化物的关键.作为一种非金属半导体光催化剂,石墨相氮化碳(g-C_3N_4)因具有可见光响应、环境友好及低成本等优点而广泛应用于水中有机污染物去除.然而,体相层状结构严重限制了g-C_3N_4的可见光活性.这是由于体相层状结构不利于光生电子的表面迁移,同时增加了光催化反应过程的传质阻力.为了开发一种可重复使用且具有优异可见光活性的光催化剂,进而实现在可见光照射下水中有机氟化物的高效降解及矿化,本文以氯铂酸和多孔氮化碳(pg-C_3N_4)为前驱体,运用简单的原位光还原法成功制备出一系列高分散铂沉积多孔氮化碳复合材料(Pt/pg-C_3N_4),而pg-C_3N_4则是以三聚氰胺为原料采用前驱体预处理法制备.与传统铂沉积石墨相氮化碳(Pt/g-C_3N_4)复合材料相比,由于多孔氮化碳前驱体具有暴露的几何内外表面,铂纳米粒子可高度分散于其上.因此,铂纳米粒子的电子捕获效应显著增强.另外,与其他传统还原法相比,原位光还原技术还可有效抑制铂纳米粒子的自凝聚.我们对制备的Pt/pg-C_3N_4复合材料的形貌、孔隙率、相结构、化学组成及光电性质进行了详细表征.结果显示,与传统Pt/g-C_3N_4复合材料相比,由于多孔微观结构的构建以及高度分散铂纳米粒子的沉积,制备的Pt/pg-C_3N_4复合材料的BET比表面积显著增大,光吸收能力明显增强,光催化量子效率显著提高.在可见光条件下,初步评价了该复合材料光催化降解水中偶氮染料甲基橙的活性,然后将其进一步应用于水中4-氟苯酚的降解及矿化.结果表明,由于多孔微观结构的构建以及高度分散铂纳米粒子的沉积,所制备Pt/pg-C_3N_4复合材料具有相当高的可见光光催化活性.结果还显示,所制复合材料具有很高的稳定性,连续使用4次均保持相似的活性.作为一种可见光催化剂,所制Pt/pg-C_3N_4复合材料有望广泛应用于水中持久性有机污染物的降解以及光催化劈裂水产氢、NO分解和CO_2还原等领域.

关键词：光催化作用多孔氮化碳光还原铂沉积 4-氟苯酚