Study on vapor-thermal synthesis and sulfur-doping of TiO2/graphene composites
Source abstract
Abstract
Abstract Intimately contacted TiO2 (nanoflake)/graphene composites were synthesized and doped with sulfur (S) at varying S/Ti molar ratios (RS/Ti) via a vapor-thermal method. S-doping led to a change in TiO2 morphology from nanoflakes to nanoparticles. The dopant S in TiO2 exhibits the multiple valence states of S2− (replacing O2−), namely S0, S4+, and S6+ (replacing Ti4+), and introduces electronic states above the valence band of TiO2, simultaneously distorting the crystal lattice of TiO2. S-doping increases the degradation rate to methylene blue pollutant from 7.7 × 10−2 min−1 to 10.7 × 10−2 min−1 due to the increase in OH/ O2− free radicals, which play an important role in methylene blue degradation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (62)
Show source-provided references
1. Catalysis under cover: enhanced reactivity at the interface between (doped) graphene and anatase TiO210.1021/jacs.6b02990 ↗
2. Phonon-driven selective modulation of exciton oscillator strengths in anatase TiO2 nanoparticles10.1021/acs.nanolett.8b01837 ↗
3. Nanocrystalline anatase TiO2/reduced graphene oxide composite films as photoanodes for photoelectrochemical water splitting studies10.1039/C5CP06707C ↗
4. The Electronic origin of the visible-light absorption properties of C-, N-and S-doped TiO2 nanomaterials10.1021/ja711023z ↗
5. Cross-linked g-C3N4/rGO nanocomposites with tunable band structure and enhanced visible light photocatalytic activity10.1002/smll.201203135 ↗
6. Graphene in photocatalysis: a review10.1002/smll.201600382 ↗
7. Solar photoactivity of nano-N-TiO2 from tertiary amine: role of defects and paramagnetic species10.1016/j.apcatb.2010.02.027 ↗
8. Photo-induced charge separation across the graphene−TiO2 interface is faster than energy losses: a time-domain ab initio analysis10.1021/ja3063953 ↗
9. Fine structure constant defines visual transparency of graphene10.1126/science.1156965 ↗
10. Large-scale pattern growth of graphene films for stretchable transparent electrodes10.1038/nature07719 ↗
11. Enhanced photocatalytic activity of hierarchical macro/mesoporous TiO2-graphene composites for photodegradation of acetone in air10.1016/j.apcatb.2012.02.035 ↗
12. Heteroatom doped graphene in photocatalysis: a review10.1016/j.apsusc.2015.08.177 ↗
13. Graphdiyne-hybridized N-doped TiO2 nanosheets for enhanced visible light photocatalytic activity10.1007/s10853-018-2210-y ↗
14. Designing cotton fibers impregnated with photocatalytic graphene oxide/Fe, N-doped TiO2 particles as prospective industrial self-cleaning and biocompatible textiles10.1016/j.msec.2018.09.046 ↗
15. WO3 QDs enhanced photocatalytic and electrochemical perfomance of GO/TiO2 composite10.1016/j.cattod.2018.02.037 ↗
16. Tuning the electronic and structural properties of Gd-TiO2-GO nanocomposites for enhancing photodegradation of IC dye: The role of Gd3+ion10.1016/j.apcatb.2018.10.031 ↗
17. Facile construction of ternary CuFe2O4-TiO2 nanocomposite supported reduced graphene oxide (rGO) photocatalysts for the efficient hydrogen production10.1016/j.apsusc.2018.01.282 ↗
18. Preparation of S-doped TiO2-three dimensional graphene aerogels as a highly efficient photocatalyst10.1016/j.synthmet.2017.06.020 ↗
19. Photodegradation of sulforhodamine-B dye in platinized titania dispersions under visible light irradiation: Influence of platinum as a functional Co-catalyst10.1021/jp020205p ↗
20. Fe3+ doped TiO2 nanotubes for combined adsorption–sonocatalytic degradation of real textile wastewater10.1016/j.apcatb.2012.09.051 ↗
21. Passivated co-doping approach to bandgap narrowing of titanium dioxide with enhanced photocatalytic activity10.1016/j.apcatb.2016.06.054 ↗
22. Band gap narrowing of titanium dioxide by sulfur doping
23. Preparation of S-doped TiO2 photocatalysts and their photocatalytic activities10.1016/j.apcata.2004.01.007 ↗
24. Enhanced photocatalytic activity of sulfur doped TiO2 for the decomposition of phenol: a new insight into the bulk and surface modification10.1016/j.matchemphys.2013.11.038 ↗
25. Structural and surface approach to the enhanced photocatalytic activity of sulfated TiO2 photocatalyst10.1016/j.apcatb.2005.09.008 ↗
26. S-TiO2/S-reduced graphene oxide for enhanced photoelectrochemical water splitting10.1016/j.apsusc.2018.01.070 ↗
27. Self-assembled TiO2-graphene hybrid nanostructures for enhanced Li-ion insertion10.1021/nn900150y ↗
28. Photocatalytic degradation of organic pollutants using rGO supported TiO2-CdS composite under visible light irradiation10.1016/j.jallcom.2016.05.111 ↗
29. Controllable growth of BiOCl on Fe4N/Fe3O4 magnetic particles through vapor thermal synthesis10.1021/acs.cgd.9b00338 ↗
30. TiO2-graphene nanocomposites for Ggas-phase photocatalytic degradation of volatile aromatic pollutant: Is TiO2-graphene truly different from other TiO2-carbon composite materials?10.1021/nn1024219 ↗
31. Uniform ordered two-dimensional mesoporous TiO2 nanosheets from hydrothermal-induced solvent-confined monomicelle assembly10.1021/jacs.8b00909 ↗
32. Improved activity of a graphene–TiO2 hybrid electrode in an electrochemical supercapacitor10.1016/j.carbon.2013.07.006 ↗
33. The synergistic effect of graphitic N and pyrrolic N for the enhanced photocatalytic performance of nitrogen-doped graphene/TiO2 nanocomposites10.1016/j.apcatb.2015.08.049 ↗
34. Effective improvement of photocatalytic hydrogen evolution via a facile in-situ solvothermal N-doping strategy in N-TiO2/N-graphene nanocomposite10.1016/j.ijhydene.2014.02.173 ↗
35. Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure10.1016/j.apcatb.2011.10.012 ↗
36. Defects and interface states related photocatalytic properties inreduced and subsequently nitridized Fe3O4/TiO210.1016/j.jmst.2017.09.019 ↗
37. Building of CoFe2/CoFe2O4/MgO architectures: structure, magnetism and surface functionalized by TiO210.1016/j.apsusc.2016.09.076 ↗
38. Synthesis and electrochemical properties of reduced graphene oxide via chemical reduction using thiourea as a reducing agent10.1016/j.matlet.2013.09.044 ↗
39. One-pot synthesis of nitrogen and sulfur co-doped graphene as efficient metal-free electrocatalysts for the oxygen reduction reaction10.1039/C4CC00440J ↗
40. Photocatalytic performance and magnetic separation of TiO2-functionalized γ-Fe2O3, Fe, and Fe/Fe2O3 magnetic particles10.1016/j.jallcom.2017.01.045 ↗
41. Efficient visible-light-induced photocatalytic disinfection on sulfur-doped nanocrystalline titania10.1021/es035374h ↗
42. Innovative visible light-activated sulfur doped TiO2 films for water treatment10.1016/j.apcatb.2011.06.039 ↗
43. Core-shell nanostructured “Black” rutile Titania as excellent catalyst for hydrogen production enhanced by sulfur doping10.1021/ja4076748 ↗
44. Oxidation of thiourea and substituted thioureas: a review10.1080/17415993.2010.550294 ↗
45. An insight toward the photocatalytic activity of S doped 1-D TiO2 nanorods prepared via novel route: as promising platform for environmental leap10.1016/j.molcata.2015.12.002 ↗
46. Visible light absorbing TiO2 nanotube arrays by sulfur treatment for photoelectrochemical water splitting10.1021/acs.jpcc.5b01104 ↗
47. Preparation and characterization of N-S-codoped TiO2 photocatalyst and its photocatalytic activity10.1016/j.jhazmat.2007.12.018 ↗
48. Bulk and surface modification of TiO2 with sulfur and silver: synergetic effects of dual surface modification in the enhancement of photocatalytic activity10.1016/j.mssp.2015.07.070 ↗
49. Preparation, characterization and photocatalytic activities of Ag-deposited porous TiO2 sheets10.1016/j.catcom.2008.11.016 ↗
50. Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals10.1126/science.1200448 ↗
51. Green synthesis of biphasic TiO2-reduced graphene oxide nanocomposites with highly enhanced photocatalytic activity10.1021/am301287m ↗
52. Multi- dimensionally ordered, multi-functionally integrated r-GO@TiO2(B)@Mn3O4 yolk-membrane-shell superstructures for ultrafast lithium storage10.1007/s12274-016-1096-8 ↗
53. TiO2 photoactivity in vis and UV light: the influence of calcination temperature and surface properties10.1016/j.apcatb.2008.04.028 ↗
54. Fabrication and photocatalytic properties of cationic and anionic S-doped TiO2 nanofibers by electrospinning10.1016/j.apcatb.2013.08.004 ↗
55. Role of hydroxylation modification on the structure and property of reduced graphene oxide/TiO2 hybrids10.1016/j.apsusc.2016.04.138 ↗
56. Oxygen vcancy structure associated photocatalytic water oxidation of BiOCl10.1021/acscatal.6b02613 ↗
57. P25-graphene composite as a high performance photocatalyst10.1021/nn901221k ↗
58. Novel TiO2 CVD films for semiconductor photocatalysis10.1016/S1010-6030(02)00190-9 ↗
59. Visible light response and superior dispersed S-doped TiO2 nanoparticles synthesized via ionic liquid10.1016/j.apt.2017.02.007 ↗
60. Electrical and optical properties of TiO2 anatase thin films10.1063/1.356306 ↗
61. N/S-doped graphene derivatives and TiO2 for catalytic ozonation and photocatalysis of water pollutants10.1016/j.cej.2018.04.214 ↗
62. Probing of photocatalytic surface sites on SO42−/TiO2 solid acids by in situ FT-IR spectroscopy and pyridine adsorption10.1016/j.jphotochem.2005.09.007 ↗