Effect of synthesis temperature on the structural properties and photocatalytic activity of TiO2/SiO2 composites synthesized using rice husk ash as a SiO2 source

Yener, H. Banu; Helvacı, Şerife Ş.

doi:10.1016/j.seppur.2014.11.013

Cited by 34 publications

(17 citation statements)

References 36 publications

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“…4b, the agglomerates of the TiO 2 particles consist of spherical particles. Previous studies showed that, these spheres were formed by the interconnected nano fibers growing from a center in a radial direction [4]. Since the size of these nano fibers are quite homogeneous, the surface of the spheres formed by the tips of the nano fibers seems very smooth.…”

Section: Sem Analysismentioning

confidence: 96%

“…The TiO 2 /clinoptilolite composites were synthesized by the acid hydrolysis of TiCl 4 on the clinoptilolite. The procedure reported by Yener and Helvacı [4,32] was followed for synthesis. Briefly, the aqueous solution of TiCl 4 (0.5 M) was prepared using HCl (3 M) to control the fast hydrolysis reaction of the TiCl 4 in water.…”

Section: Synthesis Of Tio 2 On Clinoptilolite Supportmentioning

confidence: 99%

“…The dispersion of TiO 2 on a support provides high specific surface area which enhances the degradation performance. The materials used as a support for TiO 2 particles are generally SiO 2 [4][5][6][7][8][9], activated carbon [10,11], and zeolites [2,3,[12][13][14][15]. Among these supports, zeolites have attracted interest due to their unique structures, uniform pores, and channels [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid

Yener

Yılmaz

Deliismail

et al. 2017

Separation and Purification Technology

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Clinoptilolite supported rutile TiO 2 composites were synthesized for the enhancement of its photocatalytic performance in the degradation of the aqueous terephthalic acid solution under UVC illumination by the increase in its surface area and to simplify its recovery from the treated solution after use. The XRD spectra of the composites revealed the formation of pure rutile TiO 2 on the surface of the clinoptilolite. The SEM images showed the formation of the spherical TiO 2 clusters were composed of nano fibers on the surface of the clinoptilolite. For all composites synthesized, the dispersion of the TiO 2 particles on the clinoptilolite led to a surface area larger than that of the bare TiO 2 and clinoptilolite. The materials synthesized in the present study exhibited higher catalytic activity compared with the commercial Degussa P25 and anatase. Among the catalysts synthesized the TiO 2 /clinoptilolite with a weight ratio of 0.5 was found to be the most photoactive catalyst even though it contains a lesser amount of active TiO 2 . The kinetic of the reactions for different catalyst was found to be consistent with the pseudofirst order kinetic model. The results of the Langmuir-Hinshelwood model showed the slight contribution of the adsorption on the degradation. The activity of the TiO 2 /clinoptilolite with a weight ratio of 0.5 decreased after repetitive use due to the accumulation of the TPA molecules on the surface of the catalyst.

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Section: Sem Analysismentioning

confidence: 96%

Section: Synthesis Of Tio 2 On Clinoptilolite Supportmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid

Yener

Yılmaz

Deliismail

et al. 2017

Separation and Purification Technology

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“…Moreover, the XRD shows sharp peaks which may related to the high crystalline of the prepared TiO 2 . The XRD patterns of the prepared SiO 2 (Figure 3-b) showed a broad peaks at 2θ equal to 22.8 and small peaks at 26.6, 36.1 and 72.3 which confirm the preparation of Nanoparticles of SiO 2 [10,11]. These broad peaks reflect the amorphous nature of the prepared silicon oxide particles.…”

Section: Nanoparticles Characterizationmentioning

confidence: 64%

Effects of TiO<sub>2</sub>/SiO<sub>2</sub> Reinforced Nanoparticles on the Mechanical Properties of Green Hybrid Coating

Gobara¹

2015

ILCPA

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Titanium and silica oxides nanoparticles were introduced into hybrid silica sol-gel/epoxy coating to enhance the mechanical properties of coatings. Titanium dioxide (TiO 2 ) and silica oxide (SiO 2 ) were chemically synthesised before adding to the prepared silica sol gel coating. X-ray diffraction (XRD), Energy-dispersive x-ray analysis (EDX) and Transmission Electron microscope (TEM) were used to characterize the prepared nanoparticles. The coating was then applied to 3003 aluminium alloy (AA3003) surface. The adhesion performance of different sol gel coating compositions was investigated using shear test to define the influence of nanoparticles on adhesive strength of the coating. The Rockwell C hardness test was used to study the micro-hardness of different compositions of sol gel coating. Also, contact angel was used to investigate the hydrophobicity of the coatings. The results showed that there was a significant improvement of the adhesion performance of hybrid silica sol gel coating due to addition of TiO 2 and the hydrophobicity of sol gel coating was increased due to addition of SiO 2 nanoparticles.

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“…It has been reported that the pine trees have about 66 0.08-1.37 wt.% of dry weight biogenic silica (BSi) in the needles 67 and pine depending on their family [24,25]. In previous works, bio-68 genic silica was prepared by rice straw [26,27] and rice husk ash 69 [28]. According to the best of our knowledge, there is no previous 70 report about the preparation of the nanosilica particles using the 71 pine cones and pine needles as raw materials.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of nanosilica by thermal decomposition of pine cones and pine needles

Assefi

Davar

Hadadzadeh

2015

Advanced Powder Technology

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Effect of synthesis temperature on the structural properties and photocatalytic activity of TiO2/SiO2 composites synthesized using rice husk ash as a SiO2 source

Cited by 34 publications

References 36 publications

Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid

Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid

Effects of TiO<sub>2</sub>/SiO<sub>2</sub> Reinforced Nanoparticles on the Mechanical Properties of Green Hybrid Coating

Green synthesis of nanosilica by thermal decomposition of pine cones and pine needles

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