Photodegradation of methylene blue in the visible spectrum: An efficient W6+ ion doped anatase titania photocatalyst via a solvothermal method

Vacuum ◽  
2016 ◽  
Vol 126 ◽  
pp. 63-69 ◽  
Author(s):  
Yongkun Zou ◽  
Yuxuan Gong ◽  
Bizhou Lin ◽  
Nathan P. Mellott
Keyword(s):  
Methylene Blue ◽  
Solvothermal Method ◽  
Visible Spectrum ◽  
Anatase Titania ◽  
Titania Photocatalyst

scholarly journals Mechanistic Study on Facet-Dependent Deposition of Metal Nanoparticles on Decahedral-Shaped Anatase Titania Photocatalyst Particles

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 542 ◽  
Author(s):  
Kenta Kobayashi ◽  
Mai Takashima ◽  
Mai Takase ◽  
Bunsho Ohtani
Keyword(s):  
Mechanistic Study ◽  
Phase Reaction ◽  
Surface Charges ◽  
Platinum Nanoparticle ◽  
Nanoparticle Deposition ◽  
Selective Reaction ◽  
Anatase Titania ◽  
Deposition Density ◽  
Titania Photocatalyst ◽  
Source Materials

Facet-selective gold or platinum-nanoparticle deposition on decahedral-shaped anatase titania particles (DAPs) exposing {001} and {101} facets via photodeposition (PD) from metal-complex sources was reexamined using DAPs prepared with gas-phase reaction of titanium (IV) chloride and oxygen by quantitatively evaluating the area deposition density on {001} and {101} and comparing with the results of deposition from colloidal metal particles in the dark (CDD) or under photoirradiation (CDL). The observed facet selectivity, more or less {101} preferable, depended mainly on pH of the reaction suspensions and was almost non-selective at low pH regardless of the deposition method, PD or CDL, and the metal-source materials. Based on the results, the present authors propose that facet selectivity is attributable to surface charges (zeta potential) depending on the kind of facets, {001} and {101}, and pH of the reaction mixture and that this concept can explain the observed facet selectivity and possibly the reported facet selectivity without taking into account facet-selective reaction of photoexcited electrons and positive holes on {101} and {001} facets, respectively.

scholarly journals Facile synthesis of mesoporous titanium dioxide doped by Ag-coated graphene with enhanced visible-light photocatalytic performance for methylene blue degradation

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25314-25324 ◽  
Author(s):  
Lin Xiao ◽  
Li Youji ◽  
Chen Feitai ◽  
Xu Peng ◽  
Li Ming
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Solvothermal Method ◽  
Sol Gel ◽  
Facile Synthesis ◽  
Methylene Blue Degradation ◽  
Visible Light Driven ◽  
Visible Light Photocatalytic

A highly efficient and elaborately structured visible-light-driven catalyst composed of mesoporous TiO2 (MT) doped with Ag+-coated graphene (MT-Ag/GR) has been successfully fabricated by a sol–gel and solvothermal method.

Nano-Titania Photocatalyst Loaded on W-MCM-41 Support and Its Highly Efficient Degradation of Methylene Blue

2011 ◽  
Author(s):  
H. Shankar ◽  
R. Saravanan ◽  
V. Narayanan ◽  
A. Stephen ◽  
Alka B. Garg ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Highly Efficient ◽  
Titania Photocatalyst ◽  
Mcm 41

scholarly journals Shape Evolution Behavior of Anatase Titania Nanocrystals via the Solvothermal Method

2016 ◽  
Vol 32 (2) ◽  
pp. 581-588 ◽  
Author(s):  
Zheng-Xia XU ◽  
◽  
Ji-Tao YANG ◽  
Kang LIU ◽  
Xiao-Qiang GUO ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Shape Evolution ◽  
Anatase Titania ◽  
Evolution Behavior

Remarkable Ti-promotion in vanadium doped anatase titania for methylene blue adsorption in aqueous medium

2018 ◽  
Vol 6 (4) ◽  
pp. 5212-5220 ◽  
Author(s):  
Kamalesh Pal ◽  
Kalyan Ghorai ◽  
Sudiksha Aggrawal ◽  
Tapas Kumar Mandal ◽  
Paritosh Mohanty ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Aqueous Medium ◽  
Methylene Blue Adsorption ◽  
Anatase Titania

Enhancement of the Photodegradation of Methylene Blue by Combined Titania Photocatalyst and Photo-Fenton

2008 ◽  
Vol 11 (3) ◽  
Author(s):  
Panagiotis Bouras ◽  
Panagiotis Lianos ◽  
Dionysios D. Dionysiou
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Nanocrystalline Films ◽  
Titania Photocatalyst

AbstractThe decolorization of Methylene Blue has been studied in aqueous solutions in the presence of Titania nanocrystalline films alone or with added Fe

scholarly journals Фотокаталитические свойства композиции alpha-Bi-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-/Bi в видимой области света в зависимости от концентрации металлического висмута и степени дефектности кристаллической решетки оксида висмута

2020 ◽  
Vol 128 (3) ◽  
pp. 327
Author(s):  
Е.А. Кириченко ◽  
О.И. Каминский ◽  
А.В. Зайцев ◽  
К.С. Макаревич ◽  
С.А. Пячин
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Crystal Lattice ◽  
Annealing Temperature ◽  
Isothermal Annealing ◽  
Visible Spectrum ◽  
Metallic Bismuth ◽  
Low Temperature Pyrolysis

The photocatalytic activity of the α-Bi2O3/Bi heterostructure compositions obtained by the method of low-temperature pyrolysis of bismuth-sorbitol complexes was investigated. The effectiveness of catalysts is estimated by the rate of decomposition of methylene blue (MS) upon irradiation with light of the visible spectrum. The catalysts obtained by varying the amount of sorbitol in the composition of the precursor organo-mineral complex of bismuth and by varying the temperature of synthesis, differ in different contents of metallic Bi and have different degrees of defectiveness of the α-Bi2O3 crystal lattice. It is established that isothermal annealing of α Bi2O3/Bi compositions in air in the range of 400–600°C leads to relaxation of defects and an increase in the volume of the α-Bi2O3 crystal lattice. An increase in the annealing temperature to 550°С is accompanied by an increase in the catalytic activity of α-Bi2O3/Bi. However, at higher temperatures, degradation of the heterostructure occurs as a result of the oxidation of metallic bismuth, and the catalytic activity of the composition decreases.

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