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Surface-state controlled synthesis of hydrophobic and hydrophilic carbon dots

Nano Research 2024年第5期17卷 4391-4399页

作者： Chan Wang Yuan Fang Mi Zhang Huan Zhuo qijun song Han Zhu Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Jiangsu Snow Leopard Household Chemical Co. Ltd.Wuxi 214400China

It is of great significance to synthesize carbon dots(CDs)with desirable hydrophilicity for the ever-growing application of CDs in different *** this study,the hydrophilic and hydrophobic CDs were facilely prepared by solvothermal treatment of o-dihydroxybenzene and urea in N,N-dimethylformamide(DMF).Optimization experiments revealed that the solvothermal temperature has a great impact on the surface states of the *** hydrophobic CDs with a contact angle of 110.7°was obtained at 200℃.The structural and optical characterizations,along with theoretical calculations elucidated that the lipophilic nature of the CDs was resulting from the formation of polymer *** presence of extended conjugated sp^(2)-domains and amino groups contributed to the red emission of the CDs synthesized at low reaction temperatures(160-200℃).With the further increase of solvothermal temperature,the hydrophobic CDs were gradually transformed to the hydrophilic state accompanying the blue shift of the fluorescence of the *** highly hydrophilic CDs with a contact angle of 25.9°were obtained at 240℃ due to the increased formation of hydrophilic functional groups on the surface of *** red emissive CDs exhibited a sensitive color and fluorescence response to ethanol content while the fluorescence of the blue emissive CDs remained *** combining the two kinds of CDs,a dual-emission sensor was constructed,which was successfully applied for the evaluation of the alcoholic strength in commercial Baijiu commodities in both fluorometric and colorimetric modes.

关键词： carbon dots surface chemistry hydrophilicity and hydrophobicity solvothermal temperature alcoholic strength evaluation

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Preparation of multicolor carbon dots with thermally turn-on fluorescence for multidimensional information encryption

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Chinese Chemical Letters 2024年第1期35卷 343-347页

作者： Chan Wang Jianfeng Huang Yimin He Guoxia Ran qijun song Key Laboratory of Synthetic and Biological Colloids Ministry of EducationInternational Joint Research Center for Photoresponsive Molecules and MaterialsSchool of Chemical&Material EngineeringJiangnan UniversityWuxi 214122China Department of Radiation Oncology Affiliated Hospital of Jiangnan UniversityWuxi 214122China

Carbon dots(CDs)with superior fluorescence properties have attracted a growing number of research interests in ***,the preparation of CDs with thermally turn-on fluorescence and full-color-emitting in visible spectrum is still a big challenge due to the complicated reaction mechanism in the formation of ***,a simple precursor-oriented strategy for the preparation of multicolor CDs with heat-stimuli turn-on fluorescence is *** experimental characterizations and theoretical calculations revealed that the emission wavelength of CDs can be readily tuned from 460 nm to 654 nm with selected precursors,which was ascribed to the extent of conjugated sp2-domains(core states)and the amount of oxygen-and nitrogen-containing groups bound to sp2-domains(surface states).After simply mixing two or three kinds of CDs,a full-color range of fluorescence emission was realized,and the CDs-based fluorescence inks were successfully ***,all the printed patterns from the inkjet exhibited a thermal-induced enhancement in *** this basis,combining CDs with heating-induced“turn-off”fluorescence materials can lead to multidimensional and multistage *** results demonstrate that the thermochromic and photochromic CDs with much more enhanced security exhibit promising application in data storage and encryption.

关键词： Carbon dots Precursor-oriented structure Full-color fluorescence Turn-on thermosensitivity Advanced anti-counterfeiting

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The function-oriented precursor selection for the preparation of carbon dots

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Nano Research 2023年第8期16卷 11221-11249页

作者： Yalan Xu Chan Wang Huan Zhuo Dongrun Zhou qijun song Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China

As a new type of fluorescent nanomaterials,carbon dots(CDs)have exhibited excellent photoluminescence properties with tunable emission and high quantum yields,hence they have attracted an increasing interest in diverse research *** photoluminescence performance of CDs is primarily influenced by their precursors,which directly or indirectly determine the structures and specific functions of the resultant *** this review,we aim to summarize the recent progress on synthesis of CDs using small aliphatic molecules,anilines,polyphenol,polycyclic aromatic hydrocarbons,organic dyes,or biomass as *** associations of the physical and chemical properties of the CDs with their respective precursors are comprehensively investigated,and the potential applications and future development of CDs are discussed in *** is hoped that this review will open new horizons for CDs preparation by rational selection of the precursors from the vastly available carbon sources and the critical comments presented,here could inspire and guide future research in the design of multifunctional CDs.

关键词： carbon dots precursors photoluminescence fluorophore sensing imaging

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One-step synthesis of fluorescent smart thermo- responsive copper clusters： A potential nanothermometer in living cells

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Nano Research 2015年第6期8卷 1975-1986页

作者： Chan Wang Lin Ling Yagang Yao qijun song Key Laboratory of Food Colloids and Biotechnology Ministry of Education School of Chemical & Material Engineering Jiangnan University Wuxi 214122 China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical Engineering Nanjing Tech University Nanjing 210009 China

Temperature measurement in biology and medical diagnostics, along with sensitive temperature probing in living cells, is of great importance; however, it still faces significant challenges. Metal nanoclusters （NCs） with attractive luminescent properties may be promising candidates to overcome such challenges. Here, a novel one-step synthetic method is presented to prepare highly fluorescent copper NCs （CuNCs） in ambient conditions by using glutathione （GSH） as both the reducing agent and the protective layer preventing the aggregation of the as-formed NCs. The resultant CuNCs, with an average diameter of 2.3 nm, contain 1-3 atoms and exhibit red fluorescence （A^m = 610 nm） with high quantum yields （QYs, up to 5.0%）. Interestingly, the fluorescence signal of the CuNCs is reversibly responsive to the environmental temperature in the range of 15-80 ℃. Furthermore, as the CuNCs exhibit good biocompatibility, they can pervade the MC3T3-E1 cells and enable measurements over the physiological temperature range of 15-45 ℃ with the use of the confocal fluorescence imaging method. In view of the facile synthesis method and attractive fluorescence properties, the as-prepared CuNCs may be used as photoluminescence thermometers and biosensors.

关键词： fluorescence copper nanoclusters cellular imaging nanothermometer

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Engineering FeS_(2) nanoparticles on tubular g-C_(3)N_(4) for photo-Fenton treatment of paint wastewater

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Chinese Chemical Letters 2022年第6期33卷 3073-3077页

作者： Chan Wang Bangqi Wei Han Zhu Yimin He Guoxia Ran qijun song Key Laboratory of Synthetic and Biological Colloids Ministry of EducationInternational Joint Research Center for Photoresponsive Molecules and MaterialsSchool of Chemical&Material EngineeringJiangnan UniversityWuxi 214122China

An efficient photo-Fenton catalyst(Fe S_(2)@HTCN)was designed by maximizing the synergistic effect of Fe S_(2)nanoparticles and hollow tubular g-C_(3)N_(4)(HTCN).Molecule self-assembly and molten salts-assisted calcination were used to engineering the hollow structured g-C_(3)N_(4)before anchoring Fe S_(2)nanoparticles on the walls of HTCN via reflux *** to bulk g-C_(3)N_(4),the unique structure of HTCN and heterojunction in the composite endowed FeS_(2)@HTCN with more active sites and abundant channels for electron transfer and charge *** enriched electrons can improve the Fe^(3+) recycling and boost Fe^(2+) catalyzed ^(·)OH production via H_(2)O_(2).As-prepared photo-Fenton catalyst was successfully applied to the treatment of industrial paint *** paint wastewater with its COD as high as 8200 mg/L can be effectively degraded with 0.2 mol/L H_(2)O_(2)in 90 min under visible light *** photoFenton system was further evaluated according to the process stability and economic benefit,proving that the strategy presented in this work would be applicable to the treatment of real wastewater.

关键词： Photo-Fenton catalysts FeS_(2)nanoparticles Hollow tubular g-C_(3)N_(4) Heterojunction Reactive oxygen species Paint wastewater degradation

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基于聚集诱导发光识别牛血清白蛋白的增强型荧光探针

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分析试验室 2023年第4期42卷 449-454页

作者：胡婉汝宋启军董萌萌合成与生物胶体教育部重点实验室江南大学化学与材料工程学院无锡214122

高水溶性环金属化铱(Ⅲ)配合物[(pq-COOH)2Ir(bpy-dC)]-(IrdC,pq-COOH=2-苯基喹啉-4-羧酸,bpy-dC=2,2’-联吡啶-5,5’-二羧酸)在聚集态或固态能够表现出强烈发光,利用这一聚集诱导发光(AIE)的独特性质,构建了一种高选择性高灵敏度检测... 详细信息

高水溶性环金属化铱(Ⅲ)配合物[(pq-COOH)2Ir(bpy-dC)]-(IrdC,pq-COOH=2-苯基喹啉-4-羧酸,bpy-dC=2,2’-联吡啶-5,5’-二羧酸)在聚集态或固态能够表现出强烈发光,利用这一聚集诱导发光(AIE)的独特性质,构建了一种高选择性高灵敏度检测牛血清白蛋白(BSA)的“turn-on”型荧光分析策略。在PBS缓冲液(pH 3.5)中,BSA的线性响应范围为0.3~300μg/mL(R^(2)=0.992),检出限低至0.16μg/mL。

关键词：铱配合物牛血清白蛋白聚集诱导发光水溶性荧光探针

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Catalytic Oxidation of Trichioroethylene over RuO2 Supported on Ceria-zirconia Mixed Oxide

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Chemical Research in Chinese Universities 2019年第1期35卷 71-78页

作者： LU Lulu WANG Chan WANG Mei song qijun Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122P.R.China 不详

Ru/Ce-Zr catalysts were prepared by impregnation of Ru on the hydrothermally synthesized Ce-Zr mixed oxide with different molar ratio of Ce/*** resultant products were systematically characterized by inductively coupled plasma(ICP),X-ray diffraction(XRD),scanning electron microscopy(SEM)/energy dispersive spectrometry(EDS),H2-temperature programmed reduction(H2-TPR),NH3-temperature programmed desorption(NH3-TPD)and X-ray photoelectron spectroscopy(XPS).It was proved by H2-TPR and NH3-TPD that the introduction of Ru can improve the activity of oxygen of catalysts and the presence of Zr contributes to the increments of acid properties of *** the molar ratio of Ce-Zr was 8:4,the quantity of Ru was 0.9%(mass ratio),and the calcined temperature of catalysts was at 400℃,the removal rate of 90% for trichloroethylene(TCE)was reached at 250℃ for 5360 mg/m^3 TCE and the stability of the catalysts was investigated under the *** results showed that the high removal rate can be maintained for at least 90 h,which is promising for industrial application.

关键词： Catalytic oxidation Trichloroethylene RuO2 Ceria-zirconia mixed oxide

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Copper nanoparticles modified nitrogen doped reduced graphene oxide 3-D superstructure for simultaneous determination of dihydroxybenzene isomers

Copper nanoparticles modified nitrogen doped reduced graphen...

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中国化学会第十九届全国有机分析及生物分析学术研讨会

作者： Haifeng Zhou Tingting Huang Dejian Chen Shunxing Li Huiwu Yu Yuhui Li qijun song The Key Lab of Food Colloids and Biotechnology Ministry of EducationSchool of Chemical and Material EngineeringJiangnan University Department of Chemistry and Environment Minnan Normal University

＜正＞3-D superstructure of Copper nanoparticles modified nitrogen doped reduced graphene oxide was successively prepared via a two-step *** was used as nitrogen source for the fabrication of nitrogen doped reduced graphene oxide and reducing agent for in-situ reduce ofThe electrochemical sensor was constructed by hybrid material-based

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亚胺化温度对聚酰亚胺纳米纤维结构和性能的影响

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化工新型材料 2017年第9期45卷 153-155页

作者：孙自淑宋启军江南大学化学与材料学院无锡214122 常州纺织服装职业技术学院纺化系常州213164 常州市新型纺织材料重点实验室常州213164

利用3,3′,4,4′-二苯甲酮四羧酸二酐(BTDA)和4,4′-二氨基二苯醚(ODA)合成得到聚酰胺酸(PAA)纺丝液,采用静电纺丝技术制备得到PAA纳米纤维,通过热亚胺化法获得BTDA-ODA型聚酰亚胺(PI)纳米纤维。用扫描电子显微镜(SEM)表征了热亚胺化前... 详细信息

利用3,3′,4,4′-二苯甲酮四羧酸二酐(BTDA)和4,4′-二氨基二苯醚(ODA)合成得到聚酰胺酸(PAA)纺丝液,采用静电纺丝技术制备得到PAA纳米纤维,通过热亚胺化法获得BTDA-ODA型聚酰亚胺(PI)纳米纤维。用扫描电子显微镜(SEM)表征了热亚胺化前后纳米纤维的形貌特征,利用傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)和热重分析(TGA)表征了不同亚胺化温度对PI纳米纤维的化学结构、结晶性能和热稳定性的影响。结果表明,当亚胺化热处理温度较低时,PAA纳米纤维的亚胺化程度较差。当亚胺化温度达到300℃时,PAA纳米纤维的亚胺化程度基本完全。随着亚胺化温度的升高,纳米纤维的结晶度逐渐增强,热稳定性也逐渐升高。

关键词：静电纺丝聚酰亚胺热亚胺化纳米纤维

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硫脲增强苯并三氮唑对Cu的防腐作用研究

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腐蚀科学与防护技术 2019年第6期31卷 576-582页

作者：庄华建王禅何福峰宋启军江南大学化学与材料工程学院无锡214122 江苏驰马拉链科技股份有限公司无锡214213

通过电化学、场发射扫描电子显微镜(SEM)、接触角测试和X射线光电子能谱(XPS)等实验方法,研究了苯并三氮唑(BTAH)中加入硫脲(TU)对Cu在3%(质量分数)NaCl腐蚀溶液中的缓蚀效果。电化学实验结果表明:在加入0.50 mmol/L TU到含BTAH的体系中... 详细信息

通过电化学、场发射扫描电子显微镜(SEM)、接触角测试和X射线光电子能谱(XPS)等实验方法,研究了苯并三氮唑(BTAH)中加入硫脲(TU)对Cu在3%(质量分数)NaCl腐蚀溶液中的缓蚀效果。电化学实验结果表明:在加入0.50 mmol/L TU到含BTAH的体系中时,显著降低Cu在3%NaCl腐蚀溶液中的腐蚀电流密度,提升了电荷转移电阻,抑制效率提高到94.01%。SEM结果显示,在加入0.50 mmol/L TU后,Cu表面网状结构明显,表面对水接触角增大至92.6°。XPS结果显示,加入0.50 mmol/L TU后,Cu含量下降,说明表面的保护膜增厚,提升保护效果。

关键词：硫脲苯并三氮唑铜腐蚀腐蚀抑制

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