Immobilization of TiO2 on perlite granules for photocatalytic degradation of phenol

Hosseini, Seyed Nezamedin; Borghei, Seyed Mehdi; Vossoughi, Manouchehr; Taghavinia, Nima

doi:10.1016/j.apcatb.2006.12.015

Cited by 266 publications

(110 citation statements)

References 27 publications

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“…The strong adsorption of the pollutants over the activated carbon was the main reason pointed by the authors to explain the occurred phenomenon. Recently, porous non-metal minerals have been taken into account as supports of TiO 2 -based photocatalysts, such as perlite, zeolite and diatomite due to their low costs [11][12][13][14]. The use of porous minerals as support induces a synergistic effect by improving the photo-efficiency of the immobilized TiO 2 NPs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

Wang

Godoi

Sun

et al. 2015

Journal of Colloid and Interface Science

118

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Diatomite, a porous non-metal mineral, was used as support to prepare TiO 2 /diatomite composites by a modified sol-gel method. The as-prepared composites were calcined at temperatures ranging from 450 to 950 o C. The characterization tests included X-ray powder diffraction (XRD), scanning electron microscopy (SEM) with an energy-dispersive X-ray spectrometer (EDS), High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption/desorption measurements. The XRD analysis indicated that the binary mixtures of anatase and rutile exist in the composites. The morphology analysis confirmed the TiO 2 particles were uniformly immobilized on the surface of diatom with a strong interfacial anchoring strength, which leads to few drain of photocatalytic components during practical applications. In further XPS studies of hybrid catalyst, we found the evidence of the presence of Ti-O-Si bond and increased percentage of surface hydroxyl. In addition, the adsorption capacity and photocatalytic activity of synthesized TiO 2 /diatomite composites were evaluated by studying the degradation kinetics of aqueous Rhodamine B under UV-light irradiation.The photocatalytic degradation was found to follow pseudo-first order kinetics according to the Langmuir-Hinshelwood model. The preferable removal efficiency was observed in composites by 750 o C calcination, which is attributed to a relatively 2 appropriate anatase/rutile mixing ratio of 90/10.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

Wang

Godoi

Sun

et al. 2015

Journal of Colloid and Interface Science

118

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“…Typical procedure given in [6], with some changes, was applied in order to prepare TiO2/perlite composites. According to that, a determined amount of TiO2 (Degussa P-25), then, 5 mL of diluted nitric acid (at pH 3.3), was added into 50 mL of absolute ethanol in an ultrasonic bath.…”

Section: Methodsmentioning

confidence: 99%

“…TiO2 can be strongly attached to the perlite surface with Ti-O-Si bonds effectively, hence, stable photocatalysts could be developed. Expanded perlite, has been widely used as photocatalyst support in recently published works in order to photocatalytic degradation of different pollutant like ammonia [2,3], sulfamethoxazole [4], ethylbenzene [5], phenol [6,7], and furfural [8]. None of them investigated the effect of preparation conditions onto degradation efficiency by any experimental design approach.…”

Section: Introductionmentioning

confidence: 99%

PREPARATION OF TiO2/PERLITE COMPOSITES BY USING 23-1 FRACTIONAL FACTORIAL DESIGN

Duranoğlu¹

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Successive impregnation and calcination processes were performed in order to produce TiO2/perlite composites. 2 3-1 fractional factorial design was first applied to optimize the production conditions of TiO2/perlite photocatalysts. Seven TiO2/perlite composites (including three central point experiments) were produced by manipulating three process parameters (amount of TiO2 used in impregnation process, particle size of perlite and calcination temperature). Prepared TiO2/perlite photocatalysts were characterized by XRay Diffraction Spectrometry and SEM. XRD patterns indicated that anatase was the main crystalline phase for all produced samples. Degradation capacities of produced TiO2/perlite composites were investigated in methylene blue degradation process. The linear models of TiO2 loading (%) and methylene blue degradation (%) of TiO2/perlite composites were developed by regression analysis of the experimental data. As a result of analysis of variance, it was found that developed models were statistically significant with the p-value of 0.0040 and 0.0003, for TiO2 loading (%) and methylene blue degradation (%), respectively. According to the coefficient of determination (0.9821 and 0.9970 for the models of TiO2 loading and methylene blue degradation, respectively) and error analysis, developed models fit well to the experimental data. Effect of process parameters was investigated by using response surface plots. Amount of TiO2 and particle size were found as the most effective parameters on both TiO2 loading (%) and degradation efficiency (%). Calcination temperature did not affect TiO2 loading but methylene blue degradation capacity.

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“…The direct reaction of •OH with the phenol molecules also gives rise to phenoxy radical. This radical, as detailed by Hosseini et al (2007), is in resonance with radical structures in o-and p-positions [24] and becomes the starting point for the formation of different intermediates. More hydroxylated compounds such as catechol, hydroquinone, benzoquinone or hydroxyl hydroquinone are then produced from subsequent reactions of the intermediates with •OH [25].…”

Section: Uv/h2o2/o3 Processmentioning

confidence: 98%

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

Azizah

Widiasa

2018

MATEC Web Conf.

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Abstract. Petroleum Refinery wastewater is characterized by a high phenol content. Phenol is toxic and resistant to biological processes for treatment of the petroleum refinery wastewater. The combination of an AOP and a biological process can be used for treatment of the refinery wastewater. It is necessary to conduct a study to determine the appropriate condition of AOP to meet the phenol removal level. Two AOP configurations were investigated: H2O2 / UV and H2O2 / UV / O3. From each process samples, COD, phenol and pH were measured. The oxidation was carried out until the targeted phenol concentration of treated effluent were obtained. The better result obtained by using process H2O2 / UV / O3 with the H2O2 concentration 1000 ppm. After 120 minutes, the final target has been achieved in which phenol concentration of 37.5 mg/L or phenol degradation of 93.75%.

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Immobilization of TiO2 on perlite granules for photocatalytic degradation of phenol

Cited by 266 publications

References 27 publications

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

PREPARATION OF TiO2/PERLITE COMPOSITES BY USING 23-1 FRACTIONAL FACTORIAL DESIGN

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

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