Cr(VI) photocatalytic reduction: Effects of simultaneous organics oxidation and of gold nanoparticles photodeposition on TiO 2

Journal of Hazardous Materials

Volumn 211-212, Issue , 2012, Pages 188-195

  Dozzi, Maria Vittoria ^a   Saccomanni, Alessia ^a   Selli, Elena ^a  

^a UNIVERSITY OF MILAN   (Italy)

Author keywords

Acid Orange 8; Au TiO 2; Formic acid; Photocatalytic reduction of Cr(VI); Titanium dioxide

Indexed keywords

ACID ORANGE; ANATASE TIO; AQUEOUS SUSPENSIONS; AU LOADING; CO-PRESENCE; COMPETITIVE ADSORPTION; CR REDUCTIONS; ELECTRON TRANSFER PROCESS; GOLD NANOPARTICLES; HIGH SURFACE AREA; HOLE SCAVENGER; LIGHT IRRADIATIONS; ORGANICS; PHOTO-DEPOSITION; PHOTO-INDUCED; PHOTOCATALYTIC OXIDATIONS; PHOTOCATALYTIC REDUCTION; PHOTOCATALYTIC REDUCTION OF CR(VI); PHOTOGENERATED CHARGE CARRIERS; SURFACE AREA; TIO; UV-VISIBLE;

ADSORPTION; AZO DYES; FORMIC ACID; METAL NANOPARTICLES; OXIDATION; PH EFFECTS; PRECIOUS METALS; SUSPENSIONS (FLUIDS); TITANIUM DIOXIDE;

CHROMIUM COMPOUNDS;

ACID ORANGE 8; AZO DYE; CHROMIUM; CHROMIUM 6; FORMIC ACID; GOLD NANOPARTICLE; TITANIUM DIOXIDE; UNCLASSIFIED DRUG;

AQUEOUS SOLUTION; CATALYST; CHROMIUM; DYE; FORMIC ACID; GOLD; IRRADIATION; NANOTECHNOLOGY; OXIDATION; OXIDE; PARTICLE SIZE; PH; PHOTOCHEMISTRY; REACTION KINETICS; REDUCTION; SCAVENGING (CHEMISTRY); SEPARATION; TITANIUM; ULTRAVIOLET RADIATION;

ADSORPTION; ARTICLE; ELECTRON TRANSPORT; OXIDATION; PH; PHOTOCATALYSIS; ULTRAVIOLET IRRADIATION;

AZO COMPOUNDS; CATALYSIS; CHROMIUM; COLORING AGENTS; GOLD; LIGHT; METAL NANOPARTICLES; OXIDATION-REDUCTION; PHOTOCHEMICAL PROCESSES; TITANIUM; WATER POLLUTANTS, CHEMICAL;

EID: 84858291244     PISSN: 03043894     EISSN: 18733336     Source Type: Journal    
DOI: 10.1016/j.jhazmat.2011.09.038     Document Type: Article

References (55)

1. Waterhouse J.A.H. Cancer among chromium platers. Br. J. Cancer 1975, 32:262-267.
2. Palmer C.D., Wittbrodt P.R. Processes affecting the remediation of chromium-contaminated sites. Environ. Health Perspect. 1991, 92:25-40.
3. Metal Pollution in Aquatic Environment 1983, Springer-Verlag, New York. 2nd ed. U. Förster, G.T.W. Wittmann (Eds.).
4. Bianchi V., Zantedeschi A., Montaldi A., Majone J. Trivalent chromium is neither cytotoxic nor mutagenic in permeabilized hamster fibroblasts. Toxicol. Lett. 1984, 8:279-286.
5. Music S., Ristic M., Tonkovic M. Sorption of chromium(VI) on hydrous iron-oxides. Z. Wasser Abwass. Forsch. 1986, 19:186-196.
6. Yoneyama H., Yamashita Y., Tamura H. Heterogeneous photocatalytic reduction of dichromate on n-type semiconductor catalysts. Nature 1979, 281:817-818.
7. 2 catalysed reduction of Cr(VI) in aqueous solutions under ultraviolet illumination. J. Appl. Electrochem. 1990, 20:518-521.
8. 2 photocatalysis for the treatment of water contaminated with metals and organic chemicals. Environ. Sci. Technol. 1993, 27:1776-1782.
9. Selli E., De Giorgi A., Bidoglio G. Humic acid-sensitized photoreduction of Cr(VI) on ZnO particles. Environ. Sci. Technol. 1996, 30:598-604.
10. Giménez J., Aguado M.A., Cervera-March S. Photocatalytic reduction of Cr(VI) with titania powders in a flow system. Kinetics and catalyst activity. J. Mol. Catal. A: Chem. 1996, 105:67-78.
11. Wang X., Pehkonen S.O., Ray A.K. Removal of aqueous Cr(VI) by combination of photocatalytic reduction and coprecipitation. Ind. Eng. Chem. Res. 2004, 43:1665-1672.
12. Litter M.I. Heterogeneous photocatalysis. Transition metal ions in photocatalytic systems. Appl. Catal. B: Environ. 1999, 23:89-114.
13. Chen X., Mao S.S. Titanium dioxide nanomaterials: synthesis, properties, modifications, and applications. Chem. Rev. 2007, 107:2891-2959.
14. 2 photocatalysis and related surface phenomena. Surf. Sci. Rep. 2008, 63:515-582.
15. 2 as photocatalyst. J. Photochem. Photobiol. A: Chem. 1998, 114:81-88.
16. Lee S.M., Lee T.W., Choi B.J., Yang J.K. J. Environ. Sci. Health A 2003, 38:2219-2228.
17. 2 photocatalysts and the effects of dissolved organic species. J. Hazard. Mater. 2008, 152:93-99.
18. 2 slurry reactor. J. Photochem. Photobiol. A: Chem. 2002, 147:71-76.
19. Papadam T., Xekoukoulotakis N.P., Poulios I., Mantzavinos D. Photocatalytic transformation of acid orange 20 and Cr(VI) in aqueous suspensions. J. Photochem. Photobiol. A: Chem. 2007, 186:308-315.
20. 2 suspensions under visible-light illumination. Environ. Sci. Technol. 2005, 39:2376-2382.
21. 2 process. Chemosphere 2006, 63:254-260.
22. 2. Langmuir 2001, 17:7174-7177.
23. Kamat P.V. Photophysical, photochemical and photocatalytic aspects of metal nanoparticles. J. Phys. Chem. B 2002, 106:7729-7744.
24. 2 particles during photoassisted oxidation of organic compounds. J. Am. Chem. Soc. 1992, 114:5230-5234.
25. 2 surfaces: principles, mechanisms, and selected results. Chem. Rev. 1995, 95:735-758.
26. 2. Appl. Catal. B: Environ. 2008, 84:332-339.
27. Lee S.L., Scott J., Chiang K., Amal R. Nanosized metal deposits on titanium dioxide for augmenting gas-phase toluene photooxidation. J. Nanopart. Res. 2009, 11:209-219.
28. Min B.K., Heo J.E., Youn N.K., Joo O.S., Lee H., Kim J.H., Kim H.S. Tuning of the photocatalytic 1,4-dioxane degradation with surface plasmon resonance of gold nanoparticles on titania. Catal. Commun. 2009, 10:712-715.
29. Selli E. Synergistic effects of sonolysis combined with photocatalysis in the degradation of an azo dye. Phys. Chem. Chem. Phys. 2002, 4:6123-6128.
30. 2 particles features. J. Photochem. Photobiol. A: Chem. 2010, 211:185-192.
31. Dozzi M.V., Prati L., Canton P., Selli E. Effects of gold nanoparticles deposition on the photocatalytic activity of titanium dioxide under visible light. Phys. Chem. Chem. Phys. 2009, 11:7171-7180.
32. Standard Methods for the Examination of Water and Wastewater 1998, American Public Health Association, Washington, DC. 20th ed. L.S. Clesceri, A.E. Greenberg, A.D. Eaton (Eds.).
33. Kydd R., Chiang K., Scott J., Amal R. Low energy photosynthesis of gold-titania catalysts. Photochem. Photobiol. Sci. 2007, 6:829-832.
34. 2 in the photocatalytic degradation of an azo dye. Gold Bull. 2007, 40:154-160.
35. 2 catalyst. Water Res. 2004, 38:3001-3008.
36. 2 modified with gold nanoparticles in the degradation of 4-chlorophenol in aqueous solution. Catal. Lett. 2004, 92:41-47.
37. Tran H., Chiang K., Scott J., Amal R. Understanding selective enhancement by silver during photocatalytic oxidation. Photochem. Photobiol. Sci. 2005, 4:565-567.
38. Navío J.A., Testa J.J., Djedjeian P., Padrón J.R., Rodríguez D., Litter M.I. Iron-doped titania powders prepared by a sol-gel method. Part II. Photocatalytic properties. Appl. Catal. A: Gen. 1999, 178:191-203.
39. Xu Y., Schoonen M.A.A. The absolute energy positions of conduction and valence bands of selected semiconducting minerals. Am. Miner. 2000, 85:543-556.
40. Ku Y., Jung I.-L. Photocatalytic reduction of Cr(VI) in aqueous solution by UV irradiation with the presence of titanium dioxide. Water Res. 2001, 35:135-142.
41. 2: surface versus lattice mechanisms. J. Phys. Chem. B 2005, 109:977-980.
42. 4 in water. J. Phys. Chem. C 2009, 113:15166-15174.
43. Joseph J.M., Destaillats H., Hung H.M., Hoffmann M.R. The sonochemical degradation of azobenzene and related azo dyes: rate enhancement via Fenton's reactions. J. Phys. Chem. A 2000, 194:301-307.
44. 2 surface fluorination on photocatalytic reactions and photoelectrochemical behaviors. J. Phys. Chem. B 2004, 108:4086-4093.
45. 2. Phys. Chem. Chem. Phys. 2005, 7:1100-1102.
46. 2. New J. Chem. 2006, 30:108-114.
47. Lawless D., Meisel D., Serpone N. Role of OH radicals and trapped holes in photocatalysis. A pulse radiolysis study. J. Phys. Chem. 1991, 95:5166-5170.
48. 2. Langmuir 2001, 17:3515-3517.
49. 2 particles in the presence of oxalate: involvement of Cr(V) species. Environ. Sci. Technol. 2004, 38:1589-1594.
50. 2 particles: relevance of Cr(V)-citrate complexes. Appl. Catal. B: Environ. 2007, 71:101-107.
51. 2 nanoparticulate system. J. Phys. Chem. C 2008, 112:16532-16538.
52. 2 and ZnO water suspensions. J. Photochem. Photobiol. A: Chem. 2006, 180:15-22.
53. 2 polymorphs. Appl. Catal. B: Environ. 2007, 78:193-201.
54. 2 nanocomposites with enhanced photocatalytic activity. J. Am. Chem. Soc. 2007, 129:4538-4539.
55. 2. J. Photochem. Photobiol. A: Chem. 2002, 148:247-255.