Dielectric and optical properties of graphitic carbon nitride–titanium dioxide nanocomposite with enhanced charge seperation
Source abstract
Abstract
Graphitic carbon nitride (g-C3N4) a polymeric semiconductor material is appealing research topic because of enhanced absorption capability in visible region. g-C3N4–TiO2 composite material was prepared with varying composition (g-C3N4: TiO2) in the range of 0.25:1–2:1 and studied using various characterization techniques including X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) and FTIR spectroscopy for structural and morphological analysis. Optical properties were studied using UV–Vis, and photoluminescence (PL) spectroscopic techniques and dielectric properties were studied using impedance analyser. UV–visible spectra show a shift toward the higher wavelength region in composite owing to the decrease in the band gap value of g-C3N4–TiO2 composites. The dielectric constant was found increased with increasing content of g-C3N4 till the composition of 1.5:1 and decreased for higher content. The optimum composition based on above studies was found to be 1:1 and 1.5:1 with optical absorption in the range of 280–420 nm covering UV and small portion of visible light, and recombination of photogenerated charge carriers were also reduced compared to g-C3N4.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Ga2O3 and related materials · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Yang N, Li G, Wang W, Yang X, Zhang WF (2011) Photophysical and enhanced daylight photocatalytic properties of N-doped TiO2/g-C3N4 composites. J Phys Chem Solids 72:1319–132410.1016/j.jpcs.2011.07.028 ↗
2. Pan L, Zou JJ, Zhang X, Wang L (2011) Water-mediated promotion of dye sensitization of TiO2 under visible light. J Am Chem Soc 133:10000–1000210.1021/ja2035927 ↗
3. Paschoalino MP, Kiwi J, Jardim WF (2006) Gas-phase photocatalytic decontamination using polymer supported TiO2. Appl Catal B 68:68–7310.1016/j.apcatb.2006.08.001 ↗
4. Xiang Q, Yu J, Jaroniec M (2012) Synergetic effect of MoS2 and graphene as cocatalysts for enhanced photocatalytic H2 production activity of TiO2 nanoparticles. J Am Chem Soc 134:6575–657810.1021/ja302846n ↗
5. Fu M, Liao J, Dong F, Li H, Liu H (2014) Growth of g-C3N4 layer on commercial TiO2 for enhanced visible light photocatalytic activity. J Nanomater 869094:1–8
6. Gao Q, Sun S, Li X, Zhang X, Duan L, Lu W (2016) Enhancing performance of CdS quantum dot-sensitized solar cells by two-dimensional g-C3N4 modified TiO2 nanorods. Nanoscale Res Lett 11:463–47110.1186/s11671-016-1677-1 ↗
7. Lee EZ, Jun YS, Hong WH, Thomas A, Jin MM (2010) Cubic mesoporous graphitic carbon(IV) nitride: an all-in-one chemosensor for selective optical sensing of metal ions. Angew Chem Int Ed 49:9706–971010.1002/anie.201004975 ↗
8. Zhang Y, Thomas A, Antonietti M, Wang X (2009) Activation of carbon nitride solids by protonation: morphology changes, enhanced ionic conductivity, and photoconduction experiments. J Am Chem Soc 131:50–5110.1021/ja808329f ↗
9. Xiang Q, Yu J, Jaroniec M (2011) Preparation and enhanced visible-light photocatalytic H2-production activity of graphene/C3N4 composites. J Phys Chem C 115:7355–736310.1021/jp200953k ↗
10. Sun J, Zhang J, Zhang M, Antonietti M, Fu X, Wang X (2012) Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles. Nat Commun 3:1139, 1–710.1038/ncomms2152 ↗
11. Zhang X, Xie X, Wang H, Zhang J, Pan B, Xie Y (2013) Enhanced photoresponsive ultrathin graphitic-phase C3N4 nanosheets for bioimaging. J Am Chem Soc 135(1):18–2110.1021/ja308249k ↗
12. Zhao F, Cheng H, Hu Y, Song L, Zhang Z, Jiang L, Qu L (2014) Functionalized graphitic carbon nitride for metal-free, flexible and rewritable nonvolatile memory device via direct laser-writing. Sci Rep 4(5882):1–7
13. Chetia TR, Ansari MS, Qureshi M (2016) Graphitic carbon nitride as a photovoltaic booster in quantum dot sensitized solar cells: a synergistic approach for enhanced charge separation and injection. J Mater Chem A 4:5528–554110.1039/C6TA00761A ↗
14. Chai B, Peng T, Mao J, Li K, Zan L (2012) Graphitic carbon nitride (g-C3N4)–Pt–TiO2 nanocomposite as an efficient photocatalyst for hydrogen production under visible light irradiation. Phys Chem Chem Phys 14:16745–1675210.1039/c2cp42484c ↗
15. Yu J, Wang S, Low J, Xiao W (2013) Enhanced photocatalytic performance of direct Z-scheme g-C3N4/TiO2 photocatalyst for decomposition of formaldehyde in air. Phys Chem Chem Phys 15:16883–1689010.1039/c3cp53131g ↗
16. Mohini R, Lakshminarasimhan N (2015) Coupled semiconductor nanocomposite g-C3N4/TiO2 with enhanced visible light photocatalytic activity. J Mater Res Bull 76:370–37510.1016/j.materresbull.2015.12.034 ↗
17. Men J, Gao Q, Sun S, Zhang X, Duan L, Lu W (2017) Carbon nitride doped TiO2 photoelectrodes for photocatalysts and quantum dot sensitized solar cells j. Mater Res Bull 85:209–21510.1016/j.materresbull.2016.09.023 ↗
18. Hu W, Li L, Li G, Tang C, Sun L (2009) High-quality brookite TiO2 flowers: synthesis, characterization, and dielectric performance. Crystal Growth Des 9(8):3676–368210.1021/cg9004032 ↗
19. Lee S, Cho I-S, Lee J-H, Kim DH, Kim DW, Kim JY, Shin H, Lee J-K, Jung HS, Park N-G, Kim KK, Ko MJ, Hong KS (2010) Two-step sol–gel method-based TiO2 nanoparticles with uniform morphology and size for efficient photo-energy conversion devices. Chem Mater 22:1958–196510.1021/cm902842k ↗
20. Sao Z, Chen S, Yu H, Quan X (2012) g-C3N4/TiO2 hybrid photocatalyst with wide absorption wavelength range and effective photogenerated charge separation. Sep Purif Technol 99:50–5410.1016/j.seppur.2012.08.024 ↗
21. Chang F, Zhang J, Xie Y, Chen J, Li C, Wang J, Luo J, Deng B, Hu X (2014) Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids. Appl Surf Sci 311:574–58110.1016/j.apsusc.2014.05.111 ↗
22. Miranda C, Mansilla H, Yanez J, Obregon S, Colon G (2013) Improved photocatalytic activity of g-C3N4/TiO2 composites prepared by a simple impregnation method. J Photochem Photobiol A 253:16–2110.1016/j.jphotochem.2012.12.014 ↗
23. Lei J, Chen Y, Shen F, Wang L, Liu Y, Zhang J (2015) Surface modification of TiO2 with g-C3N4 for enhanced UV and visible photocatalytic activity. J Alloys Compd 631:328–33410.1016/j.jallcom.2015.01.080 ↗
24. Shen J, Yang H, Shen Q, Feng Yu, Cai Q (2014) Template-free preparation and properties of mesoporous g-C3N4/TiO2 nanocomposite photocatalyst. Cryst Eng Comm 16:1868–187210.1039/C3CE42513D ↗
25. Cuility BD (1956) Elements of X-ray diffraction. Addison-Wesley Publishing Company, Inc., Reading, pp 99 (531)
26. Cuility BD (1956) Elements of X-ray diffraction. Addison-Wesley Publishing Company, Inc., Reading, pp 84 (531)
27. Cuility BD (1956) Elements of X-ray diffraction. Addison-Wesley Publishing Company, Inc., Reading, pp 88 (531)
28. Cuility BD (1956) Elements of X-ray diffraction. Addison-Wesley Publishing Company, Inc., Reading, pp 264 (531)
29. Hassan MM, Khan W, Azam A, Naqvi AH (2014) Effect of size reduction on structural and optical properties of ZnO matrix due to successive doping of Fe ions. J Lumin 145:160–16610.1016/j.jlumin.2013.06.024 ↗
30. Bledowski M, Wang L, Ramakrishnan A, Khavryuchenko OV, Khavryuchenko VD, Ricci PC, Strunk J, Cremer T, Kolbeck C, Beranek R (2011) Visible-light photocurrent response of TiO2–polyheptazine hybrids: evidence for interfacial charge-transfer absorption. Phys Chem Chem Phys 13:21511–2151910.1039/c1cp22861g ↗
31. Shalan AE, Rashad MM, Yu Y, Cantu ML, Mottaleb MSA (2013) A facile low temperature synthesis of TiO2 nanorods for high efficiency dye sensitized solar cells. Appl Phys A 110:111–12210.1007/s00339-012-7368-6 ↗
32. Kumar AA, Kumar A, Quamara JK, Dillip GR, Joob SW, Kumar J (2015) Fe(III) induced structural, optical, and dielectric behavior of cetyltrimethyl ammonium bromide stabilized strontium stannate nanoparticles synthesized by a facile wet chemistry route. RSC Adv 5:17202–1720910.1039/C4RA16775A ↗