Photocatalytic Performance of Nano-TiO2/Diatomite Composite

doi:10.15541/jim20150448

Abstract

Abstract:

Nano-TiO₂/diatomite composite was synthesized by hydrolysis-deposition method using diatomite as supporter and titanium tetrachloride as precursor. The prepared composite was characterized by X-ray diffraction, scanning electron microscopy and N₂ adsorption-desorption. The photocatalytic property of composite was determined by Rhodamine B as a target pollutant. The effects of various parameters that affect the photocatalytic properties of composite were studied. The results show that anatase TiO₂ loaded on the surface of diatomite in agglomerate and disperse states. The catalyst dosage, dye solution pH, inorganic ions and illumination intensity could affect the photocatalytic activity of TiO₂/diatomite composite in different degrees. The photocatalytic degradation rate of Rhodamine B was up to 99.8% under the conditions as follows: 10 mg/L initial dye concentration, 1.0 g/L catalyst dosage, 300 W UV light intensity, and 60 min illumination time.

Key words: TiO2/diatomite, XRD, photocatalysis, Rhodamine B

CLC Number:

TQ174

ZHANG Guang-Xin, DONG Xiong-Bo, ZHENG Shui-Lin. Photocatalytic Performance of Nano-TiO₂/Diatomite Composite[J]. Journal of Inorganic Materials, 2016, 31(4): 407-412.

Figures/Tables 13

Table 1 Chemical composition of the purified diatomite and nano-TiO2/diatomite

Composition/wt%	SiO₂	Al₂O₃	Fe₂O₃	MgO	TiO₂	L.O.I
Diatomite	92.27	2.21	0.48	0.56	0.21	2.84
Nano-TiO₂/ Diatomite	68.69	1.93	0.27	0.39	25.96	1.67

Fig. 1 XRD patterns of diatomite and nano-TiO2/diatomite composite

Fig. 2 SEM images of diatomite (a, b) and nano-TiO2/diatomite composite (c)

Fig. 3 Nitrogen adsorption-desorption isotherms and pore size distributions of diatomite and nano-TiO2/diatomite composite

Table 2 Physical characters and crystallite size of diatomite and nano-TiO2/diatomite composite

Sample	BET surface area /(m²·g^-1)	Pore volume/(cm³·g^-1)	Average pore diameter/nm	Cryatalline size /nm
Diatomite	26.20	0.04	5.28	—
TiO₂/Diatomite	30.80	0.06	5.93	15.57

Table 3 Main characteristics of dye

Dye	Category	Molecular formula	Molecular structure	λ_max/nm
Rhodamine B(RhB)	Xanthene dye	C₂₈H₃₁ClN₂O₃		554

Fig. 4 Effect of nano-TiO2/diatomite composite amount on the degradation of RhB (a) and degradation kinetic plots of RhB (b)

Table 4 Model parameters for degradation of dyes by nano-TiO2/diatomite composite

Catalyst dosage/ (g·L^-1)	k /min^-1	R²
0.5	0.058	0.998
1.0	0.072	0.992
2.0	0.100	0.989
3.0	0.102	0.999

Fig. 5 Effect of nano-TiO2/diatomite composite amount on the degradation rate and quantity of RhB

Fig. 6 Effect of initial pH on the adsorption and degradation of dyes by nano-TiO2/diatomite composite

Fig. 7 Zeta potential of TiO2/diatomite composite

Fig. 8 Effect of inorganic ions on the degradation of RhB by nano-TiO2/diatomite composite

Fig. 9 Effect of illumination intensity on the degradation of RhB by nano-TiO2/diatomite composite

References 16

[1]	SELVAM P P, PREETHI S, BASAKARALINGAM P, et al.Removal of rhodamine B from aqueous solution by adsorption onto sodium montmorillonite.Journal of Hazardous Materials, 2008, 155(1): 39-44.
[2]	MESSINA P V, SCHULZ P C.Adsorption of reactive dyes on titania- silica mesoporous materials.Journal of colloid and interface science, 2006, 299(1): 305-320.
[3]	GUO H, LIN K, ZHENG Z, et al.Sulfanilic acid-modified P25 TiO2 nanoparticles with improved photocatalytic degradation on Congo red under visible light.Dyes and Pigments, 2012, 92(3): 1278-1284.
[4]	SCHWEGMANN H, RUPPERT J, FRIMMEL F H.Influence of the pH-value on the photocatalytic disinfection of bacteria with TiO2-explanation by DLVO and XDLVO theory.Water Research, 2013, 47(4): 1503-1511.
[5]	YANG X X, CAO C D, ERICKSON L, et al.Photo-catalytic degradation of Rhodamine B on C-, S-, N-, and Fe-doped TiO2 under visible-light irradiation.Applied Catalysis B: Environmental, 2009, 91(3): 657-662.
[6]	FUJISHIMA A, RAO T N, TRYK D A.Titanium dioxide photocatalysis.Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2000, 1(1): 1-21.
[7]	SUN Z M, YANG X P, ZHANG G X, et al.A novel method for purification of low grade diatomite powders in centrifugal fields.International Journal of Mineral Processing, 2013, 125: 18-26.
[8]	SUN Z M, BAI C H, ZHENG S L, et al.A comparative study of different porous amorphous silica minerals supported TiO2 catalysts.Applied Catalysis A: General, 2013, 458: 103-110.
[9]	SUN Q, LI H, ZHENG S L, et al.Characterizations of nano-TiO2/diatomite composites and their photocatalytic reduction of aqueous Cr (VI).Applied Surface Science, 2014, 311: 369-376.
[10]	SUN Q, LI H, NIU B J, et al.Nano-TiO2 immobilized on diatomite: characterization and photocatalytic reactivity for Cu2+ removal from aqueous solution.Procedia Engineering, 2015, 102: 1935-1943.
[11]	WANG B, ZHANG G X, SUN Z M, et al.Synthesis of natural porous minerals supported TiO2 nanoparticles and their photocatalytic performance towards Rhodamine B degradation.Powder Technology, 2014, 262: 1-8.
[12]	WANG B, ZHANG G X, LENG X, et al.Characterization and improved solar light activity of vanadium doped TiO2/diatomite hybrid catalysts.Journal of Hazardous Materials, 2015, 285: 212-220.
[13]	ZHANG G X, WANG B, SUN Z M, et al. A comparative study of different diatomite-supported TiO2 composites and their photocatalytic performance for dye degradation, Desalination and Water Treatment, DOI: 10.1080/19443994.2015.1085449.
[14]	AKBARZADEH R, UMBARKAR S B, SONAWANE R S, et al.Vanadia-titania thin films for photocatalytic degradation of formaldehyde in sunlight.Applied Catalysis A: General, 2010, 374(1/2): 103-109.
[15]	WANG S B, ZHU Z H.Effects of acidic treatment of activated carbons on dye adsorption.Dyes and Pigments, 2007, 75(2): 306-314.
[16]	LI G T, SONG H Y, LIU B T.Production and contribution of hydroxyl radicals in photocatalytic oxidation process.Chinese Journal of Environmental Engineering, 2012, 6(10): 3388-3392.

Photocatalytic Performance of Nano-TiO₂/Diatomite Composite

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