Palygorskite and SnO2–TiO2 for the photodegradation of phenol

Zhang, Lili; Liu, Jianquan; Tang, Cao; Lv, Jinshun; Zhong, Hui; Zhao, Yijiang; Wang, Xin

doi:10.1016/j.clay.2010.11.003

Cited by 59 publications

(16 citation statements)

References 26 publications

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“…It was deposited by the slow addition (dropping) of 8.0 g of titanium isopropoxide in 100.0 mL of deionized water for titanium hydrolysis, then added into 5.0 g of palygorskite, and stirred for 4 h. Subsequently, the suspension was centrifuged at 2500 rpm for 4 min and the obtained solid was washed with deionized water five times. Then, the solid was dried at 353 K and finally calcined at 573 K for 4 h [36].…”

Section: Tio 2 -Palygorskite Composite (Tio 2 -Pal)mentioning

confidence: 99%

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Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Miranda

Viana²,

Honorio³

et al. 2020

Minerals

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Titanium and zirconium oxides (TiO2 and ZrO2, respectively) were obtained from alkoxides hydrolyses, and then deposited into palygorskite clay mineral (Pal) to obtain new materials for photocatalytic applications. The obtained materials were characterized by structural, morphological, and textural techniques. X-ray diffraction (XRD) results confirmed the characteristic peaks of oxides and clay transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images of the modified palygorskite with both oxides showed that the clay was successfully modified by the proposed method. The increase in the specific surface area of the clay occurred when TiO2 and ZrO2 were deposited on the surface. The photocatalytic activity of these materials was investigated using the Remazol Blue anion dye under UV light. The evaluated systems presented high photocatalytic activity, reaching approximately 98% of dye discoloration under light. Thus, TiO2–Pal and ZrO2–TiO2–Pal are promising clay mineral-based photocatalysts.

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Section: Tio 2 -Palygorskite Composite (Tio 2 -Pal)mentioning

confidence: 99%

“…The system was magnetically stirred for 4 h, followed by centrifugation and washing until a neutral final pH was achieved. The obtained solid was dried at 353 K and finally calcined at 573 K for 4 h at a heating rate of 1 • C min −1 [36].…”

Section: Zro 2 -Tio 2 -Palygorskite Composite (Zro 2 -Tio 2 -Pal)mentioning

confidence: 99%

Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Miranda

Viana²,

Honorio³

et al. 2020

Minerals

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“…Doping or surface modification by transition metals is considered one of the most efficient methods in reducing electron-hole recombination [6,[17][18][19][20][21][22][23][24]. The metal on the surface of the photocatalyst can act as a trap site for the photo-generated electrons, which can prevent electron-hole recombination, and thereby improve photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of methyl green dye in aqueous solution over natural clay-supported ZnO–TiO 2 catalysts

Hadjltaief

Zina

Gálvez

et al. 2016

Journal of Photochemistry and Photobiology A: Chemistry

197

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“…Significant progress has been made in recent years in synthesizing nanoparticles as environmental purification photocatalysts [5,6]. Many researchers reported that titanium dioxide (TiO 2 ), zinc oxide (ZnO) and tin dioxide (SnO 2 ) are the most active catalysts for the degradation of dyes, phenols and pesticides [7][8][9][10][11]. In addition, these semiconductors have been recognized as preferable materials for photocatalytic processes due to their photosensitivity, non-toxicity, low cost and high chemical stability [7,12,13].…”

Section: Introductionmentioning

confidence: 99%