Morphological, Structural and Optical Properties Study of Transition Metal Ions Doped TiO2 Nanotubes Prepared by Hydrothermal Method

Razali, Mohd Hasmizam; Ahmad-Fauzi, M.N.; Mohamed, Abdul Rahman; Sreekantan, Srimala

doi:10.7763/ijmmm.2013.v1.68

Cited by 16 publications

(31 citation statements)

References 24 publications

(16 reference statements)

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“…The noticeable change in the parameter ''c'' in comparison with ''a'' suggests that transition metal ions substitute Ti 4? preferentially on body-centered and facecentered lattice sites in the anatase structure (Khan and Swati 2016;Razali et al 2013).…”

Section: Resultsmentioning

confidence: 99%

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Kaur

Singla

Singh

2017

Int. J. Environ. Sci. Technol.

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Transition metal-doped TiO 2 nanoparticles are synthesized by sol-gel method. The as-prepared samples are characterized by various techniques to correlate structural and optical properties with chemical nature of dopants and their effect on photocatalytic degradation of diethyl phthalate esters. X-ray diffraction (XRD) reveals that all the samples are crystalline and exhibit anatase as a major phase. Chemical nature of dopants could not affect the formation of anatase and its volume fraction. The crystallite size of undoped and doped TiO 2 nanoparticles varies between 10 and 12 nm as confirmed by XRD and transmission electron microscope. The lowest optical band gap observed is 2.47 eV in Mn-doped TiO 2 . Among all the samples, Ni-doped TiO 2 sample shows better photocatalytic activity and degradation of diethyl phthalate due to its lower crystallite size and higher surface area than those of Mn-and Co-doped TiO 2 samples.

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Section: Resultsmentioning

confidence: 99%

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Kaur

Singla

Singh

2017

Int. J. Environ. Sci. Technol.

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“…With respect to the photocatalysis process, TiO 2 as a photocatalyst has recently received considerable attention for the removal of persistent organic pollutants (POPs), including phenols [11], tetracycline [12], dyes [13] and linier alkyl benzene sulphonate [14] due to its cost-effective technology, non-toxicity, quick oxidation rate and chemical stability [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The practical application of TiO 2 is, however, significantly restricted by its low visible absorption due to its wide bandgap energy (Eg) ≈ 3.20 eV [15][16][17][18][19][20][21][22][23][24][25][26] and immediate charge (electron and hole) recombination [19][20][21][22]. With such wide a band gap, TiO 2 can only be excited by photons with wavelengths shorter than 385 nm emerging in UV region [15][16][17][18][19][20][21][22]…”

Section: Introductionmentioning

confidence: 99%

Photocatalysis over N-Doped TiO2 Driven by Visible Light for Pb(II) Removal from Aqueous Media

et al. 2021

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The photocatalysis process over N-doped TiO2 under visible light is examined for Pb(II) removal. The doping TiO2 with N element was conducted by simple hydrothermal technique and using urea as the N source. The doped photocatalysts were characterized by DRUVS, XRD, FTIR and SEM-EDX instruments. Photocatalysis of Pb(II) through a batch experiment was performed for evaluation of the doped TiO2 activity under visible light, with applying various fractions of N-doped, photocatalyst mass, irradiation time, and solution pH. The research results attributed that N doping has been successfully performed, which shifted TiO2 absorption into visible region, allowing it to be active under visible irradiation. The photocatalytic removal of Pb(II) proceeded through photo-oxidation to form PbO2. Doping N into TiO2 noticeably enhanced the photo-catalytic oxidation of Pb(II) under visible light irradiation. The highest photocatalytic oxidation of 15 mg/L Pb(II) in 25 mL of the solution could be reached by employing TiO2 doped with 10%w of N content 15 mg, 30 min of time and at pH 8. The doped-photocatalyst that was three times repeatedly used demonstrated significant activity. The most effective process of Pb(II) photo-oxidation under beneficial condition, producing less toxic and handleable PbO2 and good repeatable photocatalyst, suggest a feasible method for Pb(II) remediation on an industrial scale.

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“…The transition metals that have been examined as dopants on TiO 2 are Cu(II) [53,54], Fe [55,56], Co [56,57], Ni [57], Mn [56], and Cr [58]. Moreover, Ag(I) [5][6][7][8][9][10][11][12][13], Au(III) [13,14], Pd(II) [14], and Pt(IV) [14] are the noble metals that are frequently doped into TiO 2 structure.…”

Section: Photoreduction Methods Over Tio 2 For Metal Recovery and Dopimentioning

confidence: 99%

“…A doping process basically involves the conversion of the metal ions in the solution to be deposited solid metal on TiO 2 powder that is frequently carried out by sol-gel method [56]. However, hydrothermal [57] and chemical vapor [58] methods are also introduced.…”

Section: Photoreduction Methods Over Tio 2 For Metal Recovery and Dopimentioning

confidence: 99%

Photoreduction Processes over TiO2 Photocatalyst

Wahyuni¹,

Aprilita²

2019

Photocatalysts - Applications and Attributes

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This chapter presents the study of TiO 2 photocatalyst for the photoreduction of several reducible chemicals. The photocatalytic reduction of several toxic metal ions, including Ag (I), Cu(II), Cr(VI), Hg(II), and U(VI) in the presence of TiO 2 , in order to decrease their toxicity, is described. Photodeposition of the noble metals, such as Ag(I), Au(III), Pt(IV), and Pd(II) for doping purposes by photocatalytic reduction over TiO 2 , is also addressed. Conversion of the greenhouse gas of CO 2 into useful hydrocarbons and methanol by photocatalytic reduction using TiO 2 photocatalyst is highlighted. Several operating parameters in photoreduction processes that are photocatalyst dose, time of the irradiation, pH of the solution, and the initial concentration of the substrates (the reducible chemicals) are also reviewed.

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Morphological, Structural and Optical Properties Study of Transition Metal Ions Doped TiO2 Nanotubes Prepared by Hydrothermal Method

Cited by 16 publications

References 24 publications

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Photocatalysis over N-Doped TiO2 Driven by Visible Light for Pb(II) Removal from Aqueous Media

Photoreduction Processes over TiO2 Photocatalyst

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