Ph.D. degree from Nanjing University in 2005.

the first prize  in the Ninth National 'Challenge Cup' Competition and was awarded the title of  'Challenge students' in 2005.

 post-doctoral in  Department of Physics, Nanjing University from Aug 2005 to May 2007.

From June 2008 to the  present, Associate professor in the Department of Polymer Science, Nanjing University..

From Feb 2016 to Jan 2017, he worked as a  visiting scholar at Iowa State University.

Covalent organic  frameworks (COFs), an emerging class of crystalline porous materials,  are constructed by incorporating organic building blocks into predetermined  networks through strong covalent bonds based on reticular chemistry.  Featuring unique high crystalline and porosity, low density, excellent  stability and predictable periodic channel structure, COFs are promising  materials for application in gas storage and separation, liquid phase  adsorption, energy storage and conversion, heterogeneous catalysis, sensors  and drug delivery. We currently focus on constructing novel COFs with  sophisticated topologies or functional groups, and exploring their  applications in adsorption, separation, optics, electrics, etc. Meanwhile,  we are also seeking facile and rapid ways to prepare crystallized COFs under  mild condition.

Carbon quantum dots  are a new class of carbon nanomaterials that have emerged recently and have  garnered much interest as potential competitors to conventional  semiconductor quantum dots. We currently focus on  the rational design and synthesis of high performance (high quantum yield,  small full width at half maxima) carbon quantum dots from aromatic amines,  together with the study of their multi-mode photoluminescence behaviors and  relative applications.

1.Yanfeng  Liu, Huilin Gou, Xin Huang, Guiyang Zhang, Kai Xi*, Rational synthesis  of highly efficient ultra-narrow red-emitting carbon quantum dots for  NIR-II two-photon bioimaging, Nanoscale 3 (12), 1589-1601,2020

2.Y  Liu, Y Liu, Z Meng, Y Qin, D Jiang, K Xi*, P Wang, Thiol-functionalized  reduced graphene oxide as self-assembled ion-to-electron transducer for  durable solid-contact ion-selective electrodes, Talanta 208, 120374,2020

3.Yifeng  Xiong, Qiaobo Liao, Zhengping Huang, Xin Huang, Can Ke, Hengtian Zhu,  Chenyu Dong, Haoshang Wang, Kai Xi*, Peng Zhan*, Fei Xu*, Yanqing Lu*, Ultrahigh Responsivity Photodetectors of 2D Covalent Organic Frameworks Integrated on Graphene, Advanced Materials, 1907242,2020

4.H  Gou, Y Liu, G Zhang, Q Liao, X Huang, F Ning, C Ke, Z Meng, K Xi*  ,Lifetime-tunable room-temperature phosphorescence of polyaniline carbon  dots in adjustable polymer matrices, Nanoscale 11 (39), 18311-18319,1, 2019

5.Qiaobo Liao, Can Ke, Xin Huang, Guiyang Zhang, Qi Zhang, Zewei Zhang, Yiying Zhang, Yunzhong Liu, Fangyi Ning, Kai Xi* ,Catalyst-free  and efficient fabrication of highly crystalline fluorinated covalent  organic frameworks for selective guest adsorption, Journal of Materials Chemistry A 7 (32), 18959-18970

6.Q  Liao, Q Zhang, X Wang, X Li, G Deng, Z Meng, K Xi,* P Zhan, Facile  fabrication of POSS-Modified MoS2/PMMA nanocomposites with enhanced  thermal, mechanical and optical limiting properties, Composites Science and Technology 165, 388-396,2018

7.G  Zhang, X Li, Q Liao, Y Liu, K Xi*, W Huang, X Jia, Water-dispersible  PEG-curcumin/amine-functionalized covalent organic framework  nanocomposites as smart carriers for in vivo drug delivery, Nature communications 9 (1), 2785,2018

8.J  Gu, X Li, D Hu, Y Liu, G Zhang, X Jia, W Huang, K Xi* ,Green synthesis  of amphiphilic carbon dots from organic solvents: application in  fluorescent polymer composites and bio-imaging, RSC Advances 8 (23), 12556-12561, 2018

9.Y  Liu, Y Ding, H Gou, X Huang, G Zhang, Q Zhang, Y Liu, Z Meng, K Xi,*  ,Room temperature synthesis of pH-switchable polyaniline quantum dots as  a turn-on fluorescent probe for acidic biotarget labeling, Nanoscale 10 (14), 6660-6670,2018

10.G  Zhang, Q Liao, Y Liu, L Wang, H Gou, C Ke, X Huang, K Xi*, X Jia,  Secondary structure-induced aggregation by hydrogen peroxide: a  stimuli-triggered open/close implementation by recombination,Nanoscale 10 (12), 5503-5514,2018

11.Y  Zhao, G Deng, X Liu, L Sun, H Li, Q Cheng, Kai Xi*, D Xu, MoS 2/Ag  nanohybrid: A novel matrix with synergistic effect for small molecule  drugs analysis by negative-ion matrix-assisted laser  desorption/ionization time-of-flight mass spectrometry, Analytica Chimica Acta 2016,937, 87-95

12.H Ji, F Zhou, J Gu, C Shu, Kai Xi, X Jia, Nitrogen-Doped Carbon Dots as A New Substrate for Sensitive Glucose Determination ,Sensors 16 (5), 630

13.P Chen, G Deng, D Hu, Y Wang, Z Meng, W Hua, K Xi*Enhanced mechanical properties and thermal stability of PSMA by functionalized graphene nanosheetsRSC Advances 2016,6 (73), 68748-68753

14.Xin Huang,Qiuhong Zhang,Guoqing Deng,Zhen Meng,Xudong Jia* and Kai Xi* Benzocyclobutene resin with m-carborane cages and a siloxane backbone: a novel thermosetting material with high thermal stability and shape-memory property RSC Adv., 2016,6, 24690-24697

15.J Zhou, J Gu, C Tian, D Jiang, Y Chen, K Xi* ,Co 3 O 4-cored carbon dots for chemiluminescence analysis of intracellular hydrogen peroxide, RSC Advances 2016,6 (45), 39480-39483

16.Jin Huang, Bangan Peng, Weina Wang, Hanxu Ji, Linling Li, Kai Xi, Wenyong Lai, Xinwen Zhang, Xudong Jia Architecture of Conjugated Donor–Acceptor (D–A)‐Type Polymer Films with Cross‐Linked StructuresAdvanced Functional Materials2016， 26，10，1646–1655

17.Jiangjiang Gu,Donghua Hu,Jin Huang,Xin Huang, Qiuhong Zhang, Xudong Jia* and Kai Xi* One-pot  synthesis and control of aqueous soluble and organic soluble carbon  dots from a designable waterborne polyurethane emulsion Nanoscale, 2016,8, 3973-3981

18.Xin  Huang, Qiuhong Zhang, Zheng Meng, Jiangjiang Gu, Xudong Jia, Kai Xi  Greatly Enhanced Thermo-oxidative Stability of Polybenzoxazine Thermoset  by Incorporation of m-Carborane JOURNAL OF POLYMER SCIENCE, PART A: POLYMER CHEMISTRY 2015,53, 973–980

19.Sheng  Wang, Donghua Hu, Wenwen Hua, Jiangjiang Gu, Qiuhong Zhang, Xudong Jia*  and Kai Xi* Palladium salt and functional reduced graphene oxide  complex: in situ preparation of a generally applicable catalyst for C–C  coupling reactions RSC Adv., 2015, 5, 53935-53939

20.Jin Huang, Jiangjiang Gu, Zhen Meng, Xudong Jia* and Kai Xi*Signal enhancement of sensing nitroaromatics based on highly sensitive polymer dots , Nanoscale, 2015 7, 15413-15420 DOI: 10.1039/C5NR01489A

21.Microfiber-coupler-assisted  control of wavelength tuning for Q-switched fiber laser with few-layer  molybdenum disulfide nanoplates,J Chen, G Deng, S Yan, C Li, K Xi*, F Xu, Y Lu, Optics letters 40 (15), 3576-3579

22.Jiangjiang  Gu , DonghuaHu, WeinaWang , QiuhongZhang , ZhenMeng , XudongJia*,  KaiXi* Carbon dot cluster as an efficient “off–on” fluorescent probe to  detect Au(III) and glutathione Biosensors and Bioelectronics 68(2015)27–33

23.Wei-Na  Wang, Jiangjiang Gu, Wenwen Hua, Xudong Jia and Kai Xi, A novel high  efficiency composite catalyst: single crystal triangle Au nanosheets  supported by functional reduced graphene oxide,Chemical Communication, 2014 50(64):8889-91 DOI: 10.1039/C4CC03306J

24.Qiuhong Zhang, Xin Huang, Zhen Meng,Xudong Jia* and Kai Xi* N-phenylaminomethyl hybrid silica, a better alternative to achieve reinforced PU nanocomposites RSC Adv., 2014, 4, 18146-18156 DOI: 10.1039/C4RA01419G.

25.Qiuhong  Zhang, Xin Huang, Xiaoliang Wang, Xudong Jia,*, Kai Xi,* Rheological  study of the gelation of cross-linking polyhedral oligomeric  silsesquioxanes (POSS)/PU composites Polymer 55 (2014) 1282-1291

26.Weina Wang, Zhen Meng , Qiuhong Zhang , Xudong Jia* , Kai Xi*Synthesis of stable Au–SiO2 composite nanospheres with good catalyticactivity and SERS effect Journal of Colloid and Interface Science 418 (2014), 1–7

27.J Chen, G Deng, S Yan, C Li, K Xi, F Xu, Y Lu，Microfiber-coupler-assisted  control of wavelength tuning for Q-switched fiber laser with few-layer  molybdenum disulfide nanoplates，Optics letters 40 (15), 3576-3579（2015）

28.Zhen  Meng, Wenbo Yang, Pengpeng Chen, Weina Wang, Xudong Jia* , Kai Xi*  Preparation of disk-like particles with micro/nano hierarchical  structures Journal of Colloid and Interface Science 408 (2013) 1–5

29.Jiangjiang  Gu, Weina Wang, Qiuhong Zhang, Zhen Meng, Xudong Jia* and Kai Xi*  Synthesis of fluorescent carbon nanoparticles from polyacrylamide for  fast cellular endocytosis RSC Adv. , 2013, 3, 15589-15591

30.Pengpeng  Chen, Yuan Wang, Teng Wei, Zhen Meng, Xudong Jia* and Kai Xi* Greatly  enhanced mechanical properties and heat distortion resistance of  poly(L-lactic acid) upon compositing with functionalized reduced  graphene oxide J. Mater. Chem. A, 2013, 1,9028

31.Pengpeng  Chen, Xin Huang, Qiuhong Zhang, Kai Xi, Xudong Jia*, Hybrid networks  based on poly(styrene-co-maleic anhydride) and N-phenylaminomethyl POSS Polymer 54 (2013) 1091-1097

32.Weina  Wang, Yingchun Gao, Xudong Jia*, Kai Xi*,A novel Au-Pt@PPy(polypyrrole)  coral-like structure: Facile synthesis,high SERS effect, and good  electro catalytic activity Journal of Colloid and Interface Science 396 (2013) 23–28

33.Weizhi  Li, Teng Wei, Yinchun Gao, Kai Xi, Xudong Jia* Preparation of novel  benzoxazine monomers containing ferrocenemoiety and properties of  polybenzoxazines Polymer 53 (2012) 1236-1244

34.Ying-Chun  Gao, Kai Xi, Wei-Na Wang, Xu-Dong Jia* and Jun-Jie Zhu* A novel  biosensor based on a gold nanoflowers/hemoglobin/carbon nanotubes  modified electrode Anal. Methods, 2011, 3, 2387

35.Qiuhong Zhang, Hui He, Kai Xi, Xin Huang, Xuehai Yu, and Xudong Jia* , Synthesis of N-Phenylaminomethyl POSS and Its Utilization in Polyurethane Macromolecules, 2011, 44 (3), 550–557

36.Zhen  Meng, Chunyan Xue, Luyao Lu, Bo Yuan, Xuehai Yu, Kai Xi*, Xudong  Jia*,Synthesis of dissymmetrical nanoparticles with a new hybrid silica  template ,Journal of Colloid and Interface Science,2011,356( 2), 429-433

37.Zhen  Meng, Chunyan Xue, Qiuhong Zhang, Xuehai Yu, Kai Xi*, Xudong Jia*,  Preparation of Highly Monodisperse Hybrid Silica Nanospheres Using a  One-Step Emulsion Reaction in Aqueous Solution Langmuir 2009, 25(14), 7879–7883

38.Kai Xi, Hui He, Dan Xu, Renjie Ge, Zhen Meng, Xudong Jia*,Xuehai Yu, Ultra low dielectric constant polysilsesquioxane films using T8(Me4NO)8 as porogen Thin Solid Films, 2010,518( 17), 4768-4772

39.Xi,  Kai; Meng, Zhen; Heng, Liang; Ge, Renjie; He, Hui; Yu, Xuehai; Jia,  Xudong, Polyimide-polydimethylsiloxane copolymers for  low-dielectric-constant and moisture-resistance applications, Journal of Applied Polymer Science (2009), 113(3), 1633-1641

40.Xingchen  Zhao, Zhengming Zhang, Liaoyu Wang, Kai Xi, Qingqi Cao, Dunhui Wang, Yi  Yang, Youwei Du, Excellent microwave absorption property of  graphene-coated Fe nanocomposites Scientific reports,(2013)3, 3421

41.Dan Xu, Jiangjiang Gu, Weina Wang, Xuehai Yu, Kai Xi, Xudong Jia，Development of chitosan-coated gold nanoflowers as SERS-active probes， Nanotechnology，21 (37), 375101，1020