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Journal of Materials Science & Technology 2023年第4期135卷 54-64页

作者： Xiaotong Feng Lifen Gu Naiyu Wang qiaosheng pu Guangli Liu Lanzhou Petrochemical Research Center Petrochemical Research InstitutePetrochinaLanzhou 730060China State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical engineeringLanzhou UniversityLanzhou 730000China

Carbon-based adsorption and TiO_(2)-based photocatalysis are both safe and low-cost ways of pollutant *** C-TiO_(2)architectures can effectively improve removal ***,most of those carbon frames only acted as supporting substrates,exhibiting rather limited synergistic action from TiO_(2)and ***,Fe/N co-doped nano-TiO_(2)wrapped on mesoporous carbon spheres with a core-shell structure was *** Fe,N co-doped carbon sphere with a hierarchical structure im-proved the synergy of adsorption and transfer during the photocatalytic *** extra dopant,the Fe and N partly exposed on the surface realized the in-situ migrating into the TiO_(2)shell to en-hance the interface effect,which significantly promoted the photocatalytic efficiency of the ***,the photocatalytic efficiency of the composite was investigated through two typical pollu-tants under visible-light *** degradation efficiencies for rhodamine B and paraxylene were 96.2%in 60 min and 94.1%in 20 min,respectively,with the apparent rate constant of 0.045 min^(-1)and 0.049 min^(-1),8.3 and 11.4 times of that for bare TiO_(2).The composite is likely advantageous for treating diverse environmental pollutants.

关键词： Adsorption-photocatalysis Porous carbon Nano-TiO_(2) Core-shell structure Co-doping

Recent progress on microfluidic biosensors for rapid detection of pathogenic bacteria

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Chinese Chemical Letters 2022年第4期33卷 1743-1751页

作者： Gaowa Xing Weifei Zhang Nan Li qiaosheng pu Jin-Ming Lin College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China Beijing Key Laboratory of Microanalytical Methods and Instrumentation Department of ChemistryTsinghua UniversityBeijing 100084China Division of Chemical Metrology and Analytical Science National Institute of MetrologyBeijing 100029China

Rapid on-site detection of pathogenic bacteria with high sensitivity and specificity is becoming an urgent need in public health assurance, medical diagnostics, environmental monitoring, and food safety fields. Despite being reliable and widely used, the existing methods of bacteria detection are cumbersome and time-consuming, which is not conducive to field detection. Microfluidic lab-on-a-chip technology has provided a detective tool for various analytes, due to its miniaturization, portability and low reagent consumption. Within this progress report, advances in the bacteria detection using microfluidic biosensors were discussed. Typical methods for pathogenic bacteria capture, separation and detection were introduced respectively in the first part. Then key applications of microfluidic biosensor-based rapid bacteria detection were presented. Finally, we made a conclusion and discussed possible research prospects in aspects of microfluidic biosensors for rapid detection of pathogenic bacteria.

关键词： Microfluidic chip Biosensors Pathogenic bacteria Rapid detection

Anomalous enhancement of fluorescence of carbon dots through lanthanum doping and potential application in intracellular imaging of ferric ion

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Nano Research 2018年第3期11卷 1369-1378页

作者： Shenghong Yang Xiaohan Sun Zhaoyan Wang Xiayan Wang Guangsheng Guo qiaosheng pu State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province Department of Chemistry Lanzhou University Lanzhou 730000 China School ofpharmacy Lanzhou University Lanzhou 730000 China Beijing Key Laboratory for Green Catalysis and Separation Department of Chemistry and Chemical Engineering Beijing University of Technology Beijing I00124 China

An anomalous enhancement of fluorescence of carbon dots （CDs） was observed via lanthanum （La） doping. La-doped CDs （La-CDs） were prepared through microwave pyrolysis within 4 min. With La^3＋ doping, the emission band shifted from blue to green although LaB＋ is non-fluorescent. The quantum yield and fluorescence lifetime improved by about 20% and 35%, respectively. All experiment results indicate that La^3＋ doping is an effective way to tune fluorescence and improve the performance of CDs. Another unique attribute of La-CDs is high sensitivity to Fe^3＋. The La-CD-based fluorescence probe was established and used for sensitive and selective detection of Fe^3＋ with a limit of detection of 91 nmol/L. The proposed fluorescence probe also was successfully employed to visualize intracellular Fe^3＋ in live HeLa cells through cell imaging. It was also shown that yttrium exhibited the same fluorescence enhancement effect as La. The results may provide a new route for preparing CDs with special properties.

关键词： rear earth doping carbon dots fluorescence tuning ferric ion cell imaging

A microfluidic biosensor for multiplex immunoassay of foodborne pathogens agitated by programmed audio signals

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Chinese Chemical Letters 2024年第10期35卷 370-374页

作者： Gaowa Xing Yuting Shang Xiaorui Wang Zengnan Wu Qiang Zhang Jiebing Ai qiaosheng pu Ling Lin Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants of Fujian Province College of Environmental&Biological EngineeringPutian UniversityPutian351100China Xining Urban Vocational&Technical College Xining 810000China Department of Bioengineering Beijing Technology and Business UniversityBeijing 100048China Department of Chemistry Beijing Key Laboratory of Microanalytical Methods and InstrumentationTsinghua UniversityBejing 100084China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China

Foods are often contaminated by multiple foodborne pathogens,which threatens human *** this work,we developed a microfluidic biosensor for multiplex immunoassay of foodborne bacteria with agitation driven by programmed audio *** agitation,powered by the vibration of a speaker cone during music playing,accelerated the mass transport in the incubation process to form bacterial complexes within 10 *** reagents of the two target bacteria(Escherichia coli O157:H7 and Salmonella typhimurium)were preloaded into the corresponding fore-vacuum storage chamber on the chip,and released to participate in the subsequent immune analysis process by piercing the *** the detection processes were integrated into a single microfluidic chip and controlled by a smartphone through *** selected conditions,wide linear ranges and low limits of detection(LODs<2CFU/m L)were obtained,and real food samples were successfully determined within 30 *** biosensing method can be extended to wide-ranging applications by loading different recognizing reagents.

关键词： Multiplex immunoassay Microfluidic biosensor Audio signals Foodborne bacteria Smartphone

高性能聚合物包覆量子点的制备及对Cu2+的高灵敏检测

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微纳电子技术 2022年第6期59卷 584-591页

作者：高小童秦志龙蒲巧生山东省调水工程运行维护中心棘洪滩水库管理站山东青岛266111 国网青岛供电公司山东青岛266002 兰州大学化学化工学院兰州730000

采用一步光化学反应法合成了聚N-(3-二甲氨基丙基)甲基丙烯酰胺包覆量子点(PDPMA-QD)。N-(3-二甲氨基丙基)甲基丙烯酰胺(DPMA)在紫外光作用下接枝聚合到量子点表面,由于高分子柔性链的缠绕,形成致密的聚合物保护层,有效地防止Cd^(2+)释... 详细信息

采用一步光化学反应法合成了聚N-(3-二甲氨基丙基)甲基丙烯酰胺包覆量子点(PDPMA-QD)。N-(3-二甲氨基丙基)甲基丙烯酰胺(DPMA)在紫外光作用下接枝聚合到量子点表面,由于高分子柔性链的缠绕,形成致密的聚合物保护层,有效地防止Cd^(2+)释放,降低毒性,避免环境及安全隐患,同时提高量子产率(可达78%)。PDPMA-QD荧光颜色可调,且表面兼具羧基和叔胺基,pH耐受性强。将PDPMA-QD作为荧光探针应用于环境水样中Cu^(2+)的检测,结果表明,Cu^(2+)与PDPMA-QD之间可产生电子转移,导致PDPMA-QD荧光猝灭,在0.01~1.0μmol/L内Cu^(2+)的浓度与猝灭程度呈良好的线性关系,检出限为2.1 nmoL/L,且选择性良好,为简单、快速、高效、绿色地检测重金属Cu^(2+)提供了切实可行的途径。

关键词：量子点(QD) 聚合物光化学法荧光探针铜离子

一步光化学法制备的低毒性量子点及其在细胞成像中的应用

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微纳电子技术 2022年第9期59卷 882-890页

通过一步光化学法制备了荧光颜色可调的聚丙烯酸(PAA)包覆CdS(Te)量子点(QD)。在紫外光作用下,丙烯酸(AA)接枝聚合到量子点表面配体上,形成致密的聚合物包覆层,有效防止量子点中Cd^(2+)的释放,降低毒性,同时钝化量子点的表面缺陷,减小... 详细信息

通过一步光化学法制备了荧光颜色可调的聚丙烯酸(PAA)包覆CdS(Te)量子点(QD)。在紫外光作用下,丙烯酸(AA)接枝聚合到量子点表面配体上,形成致密的聚合物包覆层,有效防止量子点中Cd^(2+)的释放,降低毒性,同时钝化量子点的表面缺陷,减小非辐射跃迁的概率,提高量子产率至74%。大肠杆菌1136实验和四甲基偶氮唑蓝(MTT)比色分析结果表明,PAA的包覆可以明显降低量子点的细胞毒性。采用自制的共聚焦激光诱导荧光检测器和负压进样系统将PAA包覆的QD和未经包覆的QD进行微流控芯片电泳分离。将PAA包覆的QD应用于膀胱癌细胞HTB-95637的成像实验,结果表明,PAA包覆的QD可以选择性标记HTB-95637细胞的细胞膜。

关键词：量子点光化学法细胞毒性细胞成像选择性标记

自组装合成金属-氮共掺杂多孔碳球及电催化氧还原性能研究

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化工新型材料 2023年第8期51卷 105-110页

作者：冯小童王乃玉蒲巧生刘光利中国石油石油化工研究院兰州化工研究中心兰州730060 兰州大学化学化工学院兰州730000

通过无模板自组装法与自牺牲制孔方式相结合,制备金属-氮(M-N)原位共掺杂的多孔碳球材料(M/N-CS,M=Cu、Fe或Ni)。该方法通过二苯碳酰二肼、金属离子与糠醛自组装形成聚合物球,在碳化过程中球体中不稳定的含氮微区分解形成多孔结构,同时... 详细信息

通过无模板自组装法与自牺牲制孔方式相结合,制备金属-氮(M-N)原位共掺杂的多孔碳球材料(M/N-CS,M=Cu、Fe或Ni)。该方法通过二苯碳酰二肼、金属离子与糠醛自组装形成聚合物球,在碳化过程中球体中不稳定的含氮微区分解形成多孔结构,同时原位形成具有高催化活性的M-NX活性位点。通过控制金属源和多重反应条件,既能保证碳化阶段碳球结构的稳定,又可实现材料的孔隙率、孔径及形貌的灵活变化。利用SEM、TEM、XRD、物理吸附及XPS测试分别对材料的结构和掺杂进行分析。所得材料用于电催化氧还原测试,其中Fe/N-CS材料的催化反应初始电位和半波电位分别为0.91V和0.79V(***),并以4e-转移方式进行反应。同时,催化材料表现出远高于商业Pt/C催化剂的稳定性与耐甲醇性。

关键词：非贵金属催化剂多孔碳无模板法孔调控电催化

精准入微——将微流控技术引入分析化学教学的探讨

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大学化学 2023年第9期38卷 89-97页

作者：李风云周雷张琳蒲巧生兰州大学化学化工学院兰州730000

微流控技术凭借其优异的微尺度操控能力,在分析化学和其他诸多领域得到了广泛而快速的发展。在本科阶段的分析化学课程引入微流控技术有助于提高分析化学教学的前沿性和趣味性,促进创新型人才的培养。本文回顾了微流控技术的发展史并挖... 详细信息

微流控技术凭借其优异的微尺度操控能力,在分析化学和其他诸多领域得到了广泛而快速的发展。在本科阶段的分析化学课程引入微流控技术有助于提高分析化学教学的前沿性和趣味性,促进创新型人才的培养。本文回顾了微流控技术的发展史并挖掘了其中蕴含的课程思政元素,简要介绍了微流控技术的重要理论和微流控芯片的基本制作方法,讨论了微流控技术与分析化学的联系。在此基础上介绍了近年来微流控技术在分析化学领域,尤其是生命分析科学领域的研究进展,以期为分析化学教学引入微流控技术提供参考。

关键词：微流控技术分析化学教学

二维微孔碳-纳米TiO_(2)/C_(3)N_(4)复合光催化剂用于增强吸附-光催化协同效应

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工业催化 2022年第1期30卷 48-55页

作者：冯小童谷丽芬王乃玉蒲巧生刘光利中国石油兰州化工研究中心石油石化污染控制与处理企业国家重点实验室甘肃兰州730060 兰州大学化学化工学院甘肃兰州730000

碳基复合型光催化剂能够有效克服传统TiO_(2)催化剂吸附能力差和可见光响应差的缺陷。设计并制备了二维微孔碳负载纳米TiO_(2)/C_(3)N_(4)三元复合型光催化剂,探究复合后催化剂物理结构和光电学性质的改进,并用于可见光催化降解对二甲... 详细信息

碳基复合型光催化剂能够有效克服传统TiO_(2)催化剂吸附能力差和可见光响应差的缺陷。设计并制备了二维微孔碳负载纳米TiO_(2)/C_(3)N_(4)三元复合型光催化剂,探究复合后催化剂物理结构和光电学性质的改进,并用于可见光催化降解对二甲苯和罗丹明B,降解率分别达96.5%和92.2%,其反应速率常数约为工业TiO_(2)催化剂(P25)的7.8倍。该三元复合型催化剂的吸附-光催化协同性能显著增强,归因于类石墨烯结构的微孔碳与光活性纳米粒子的界面效应,促进了反应过程中的光电子传导和污染物富集,同时扩展了材料的光响应范围;引入纳米级氮化碳(C_(3)N_(4))进一步与TiO_(2)在碳片层上结合形成二元半导体结构,能够加速光生电子与空穴的分离,提高整体材料的光催化活性。

关键词：催化化学光催化吸附微孔碳氮化碳可见光污染物

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白花蛇舌草种子质量分级标准研究

中国中药杂志 2012年第12期37卷 1743-1746页

作者：卢魏魏朱再标郭巧生冯杉宁梓君曹亚悦南京农业大学中药材研究所江苏南京210095

目的:制定白花蛇舌草种子质量标准。方法:对所收集的30份不同产地和不同年份的白花蛇舌草种子进行发芽率、净度、千粒重、含水量和生活力等指标的测定,使用SPSS 11.0软件,利用K类系统聚类方法制定分级标准。结果与结论:以发芽率作为主... 详细信息

目的:制定白花蛇舌草种子质量标准。方法:对所收集的30份不同产地和不同年份的白花蛇舌草种子进行发芽率、净度、千粒重、含水量和生活力等指标的测定,使用SPSS 11.0软件,利用K类系统聚类方法制定分级标准。结果与结论:以发芽率作为主要指标,净度、千粒重和含水量作为重要参考指标,初步制订了白花蛇舌草种子质量分级标准。

关键词：白花蛇舌草种子质量分级标准