Reduced-sized monolayer carbon nitride nanosheets for highly improved photoresponse for cell imaging and photocatalysis

Zeng Q, Wang H, Fu W, et al. Band engineering for novel two-dimensional atomic layers. Small, 2015, 11: 1868–1884 Zhang H. Ultrathin two-dimensional nanomaterials. ACS Nano, 2015, 9: 9451–9469 Liu J, Cao H, Jiang B, et al. Newborn 2D materials for flexible energy conversion and storage. Sci China Mater, 2016, 59: 459–474 Liang L, Li K, Xiao C, et al. Vacancy associates-rich ultrathin nanosheets for high performance and flexible nonvolatile memory device. J Am Chem Soc, 2015, 137: 3102–3108 Yu XY, Hu H, Wang Y, et al. Ultrathin MoS2 nanosheets supported on N-doped carbon nanoboxes with enhanced lithium storage and electrocatalytic properties. Angew Chem Int Ed, 2015, 54: 7395–7398 Tan C, Yu P, Hu Y, et al. High-yield exfoliation of ultrathin twodimensional ternary chalcogenide nanosheets for highly sensitive and selective fluorescence DNA sensors. J Am Chem Soc, 2015, 137: 10430–10436 Ma TY, Tang Y, Dai S, et al. Proton-functionalized two-dimensional graphitic carbon nitride nanosheet: an excellent metal-/label-free biosensing platform. Small, 2014, 10: 2382–2389 Zheng Y, Dou X, Li H, et al. Bisulfite induced chemiluminescence of g-C3N4 nanosheets and enhanced by metal ions. Nanoscale, 2016, 8: 4933–4937 Xiang MH, Liu JW, Li N, et al. A fluorescent graphitic carbon nitride nanosheet biosensor for highly sensitive, label-free detection of alkaline phosphatase. Nanoscale, 2016, 8: 4727–4732 Wang S, Li K, Chen Y, et al. Biocompatible PEGylated MoS2 nanosheets: controllable bottom-up synthesis and highly efficient photothermal regression of tumor. Biomaterials, 2015, 39: 206–217 Ang H, Tan HT, Luo ZM, et al. Hydrophilic nitrogen and sulfur co-dopedmolybdenum carbide nanosheets for electrochemical hydrogen evolution. Small, 2015, 11: 6278–6284 Huang H, Feng X, Du C, et al. High-quality phosphorus-doped MoS2 ultrathin nanosheets with amenable ORR catalytic activity. Chem Commun, 2015, 51: 7903–7906 Lin Q, Li L, Liang S, et al. Efficient synthesis of monolayer carbon nitride 2D nanosheet with tunable concentration and enhanced visible-light photocatalytic activities. Appl Catal B-Environ, 2015, 163: 135–142 Zhang M, Luo Z, Zhou M, et al. Photocatalytic water oxidation by layered Co/h-BCN hybrids. Sci China Mater, 2015, 58: 867–876 Hu C, Han Q, Zhao F, et al. Graphitic C3N4-Pt nanohybrids supported on a graphene network for highly efficient methanol oxidation. Sci China Mater, 2015, 58: 21–27 Wang X, Maeda K, Thomas A, et al. A metal-free polymeric photocatalyst for hydrogen production from water under visible light. Nat Mater, 2009, 8: 76–80 Liu J, Liu Y, Liu N, et al. Metal-free efficient photocatalyst for stable visible water splitting via a two-electron pathway. Science, 2015, 347: 970–974 Zhang J, Chen Y, Wang X. Two-dimensional covalent carbon nitride nanosheets: synthesis, functionalization, and applications. Energ Environ Sci, 2015, 8: 3092–3108 Wang J, Shen Y, Li Y, et al. Crystallinity modulation of layered carbon nitride for enhanced photocatalytic activities. Chem Eur J, 2016, 22: 12449–12454 Liang Q, Li Z, Huang ZH, et al. Holey graphitic carbon nitride nanosheets with carbon vacancies for highly improved photocatalytic hydrogen production. Adv Funct Mater, 2015, 25: 6885–6892 Rong M, Cai Z, Xie L, et al. Study on the ultrahigh quantum yield of fluorescent P, O-g-C3N4 nanodots and its application in cell imaging. Chem Eur J, 2016, 22: 9387–9395 Zhang X, Xie X, Wang H, et al. Enhanced photoresponsive ultrathin graphitic-phase C3N4 nanosheets for bioimaging. J Am Chem Soc, 2013, 135: 18–21 Wang W, Yu JC, Shen Z, et al. g-C3N4 quantum dots: direct synthesis, upconversion properties and photocatalytic application. Chem Commun, 2014, 50: 10148–10150 Zhu K, Wang W, Meng A, et al. Mechanically exfoliated g-C3N4 thin nanosheets by ballmilling as high performance photocatalysts. RSC Adv, 2015, 5: 56239–56243 Han Q, Zhao F, Hu C, et al. Facile production of ultrathin graphitic carbon nitride nanoplatelets for efficient visible-light water splitting. Nano Res, 2015, 8: 1718–1728 Niu P, Zhang L, Liu G, et al. Graphene-like carbon nitride nanosheets for improved photocatalytic activities. Adv Funct Mater, 2012, 22: 4763–4770 Du X, Zou G, Wang Z, et al. A scalable chemical route to soluble acidified graphitic carbon nitride: an ideal precursor for isolated ultrathin g-C3N4 nanosheets. Nanoscale, 2015, 7: 8701–8706 Xu K, Li X, Chen P, et al. Hydrogen dangling bonds induce ferromagnetism in two-dimensional metal-free graphitic-C3N4 nanosheets. Chem Sci, 2015, 6: 283–287 Yang S, Gong Y, Zhang J, et al. Exfoliated graphitic carbon nitride nanosheets as efficient catalysts for hydrogen evolution under visible light. Adv Mater, 2013, 25: 2452–2456 Lu Q, Deng J, Hou Y, et al. One-step electrochemical synthesis of ultrathin graphitic carbon nitride nanosheets and their application to the detection of uric acid. Chem Commun, 2015, 51: 12251–12253 Tian J, Liu Q, Asiri AM, et al. Ultrathin graphitic carbon nitride nanosheets: a novel peroxidase mimetic, Fe doping-mediated catalytic performance enhancement and application to rapid, highly sensitive optical detection of glucose. Nanoscale, 2013, 5: 11604–11609 Tian J, Liu Q, Asiri AM, et al. Ultrathin graphitic C3N4 nanosheets/graphene composites: efficient organic electrocatalyst for oxygen evolution reaction. Chem Sus Chem, 2014, 7: 2125–2130 Tong J, Zhang L, Li F, et al. An efficient top-down approach for the fabrication of large-aspect-ratio g-C3N4 nanosheets with enhanced photocatalytic activities. Phys Chem Chem Phys, 2015, 17: 23532–23537 Zhao H, Yu H, Quan X, et al. Atomic single layer graphitic-C3N4: fabrication and its high photocatalytic performance under visible light irradiation. RSC Adv, 2014, 4: 624–628 Sun Z, Xie H, Tang S, et al. Ultrasmall black phosphorus quantum dots: synthesis and use as photothermal agents. Angew Chem Int Ed, 2015, 54: 11526–11530 Liang Q, Ye L, Xu Q, et al. Graphitic carbon nitride nanosheetassisted preparation of N-enriched mesoporous carbon nanofibers with improved capacitive performance. Carbon, 2015, 94: 342–348 Yuan B, Chu Z, Li G, et al. Water-soluble ribbon-like graphitic carbon nitride (g-C3N4 ): green synthesis, self-assembly and unique optical properties. J Mater Chem C, 2014, 2: 8212–8215 Liang Q, Huang ZH, Kang F, et al. Facile synthesis of crystalline polymeric carbon nitrides with an enhanced photocatalytic performance under visible light. Chem Cat Chem, 2015, 7: 2897–2902 Cao S, Low J, Yu J, et al. Polymeric photocatalysts based on graphitic carbon nitride. Adv Mater, 2015, 27: 2150–2176 Rong M, Song X, Zhao T, et al. Synthesis of highly fluorescent P, O-g-C3N4 nanodots for the label-free detection of Cu2+ and acetylcholinesterase activity. J Mater Chem C, 2015, 3: 10916–10924 Lu YC, Chen J, Wang AJ, et al. Facile synthesis of oxygen and sulfur co-doped graphitic carbon nitride fluorescent quantum dots and their application for mercury(II) detection and bioimaging. J Mater Chem C, 2015, 3: 73–78 Liang Q, Li Z, Yu X, et al. Macroscopic 3D porous graphitic carbon nitride monolith for enhanced photocatalytic hydrogen evolution. Adv Mater, 2015, 27: 4634–4639 Zhang J, Zhang M, Yang C, et al. Nanospherical carbon nitride frameworks with sharp edges accelerating charge collection and separation at a soft photocatalytic interface. Adv Mater, 2014, 26: 4121–4126 Zhang S, Li J, Zeng M, et al. Polymer nanodots of graphitic carbon nitride as effective fluorescent probes for the detection of Fe3+ and Cu2+ ions. Nanoscale, 2014, 6: 4157–4162 Liang Q, Ma W, Shi Y, et al. Easy synthesis of highly fluorescent carbon quantum dots from gelatin and their luminescent properties and applications. Carbon, 2013, 60: 421–428 Li X, Wen J, Low J, et al. Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel. Sci China Mater, 2014, 57: 70–100 Low J, Cheng B, Yu J, et al. Carbon-based two-dimensional layered materials for photocatalytic CO2 reduction to solar fuels. Energ Storage Mater, 2016, 3: 24–35 Gao D, Xu Q, Zhang J, et al. Defect-related ferromagnetism in ultrathin metal-free g-C3N4 nanosheets. Nanoscale, 2014, 6: 2577–2581