Application of titanate nanotubes for dyes adsorptive removal from aqueous solution

Lee, Chung‐Kung; Liu, Shin-Shou; Juang, Lain-Chuen; Wang, Cheng-Cai; Lyu, Meng-Du; Hung, Shui-Hung

doi:10.1016/j.jhazmat.2007.07.010

Cited by 100 publications

(39 citation statements)

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“…Effects of acid washing treatment on the microstructures of TNTs were characterized using the transmission electron microscope (TEM), X-ray diffraction (XRD), and nitrogen adsorption-desorption isotherms and were reported in our previous investigations (Lee et al 2007a(Lee et al , 2008b. According to the TEM images of TNTs ( Fig.…”

Section: Preparation and Characterization Of Tntsmentioning

confidence: 99%

“…Adsorption-related applications of TNTs derived from hydrothermal method depend on the cation exchange properties, the availability of internal pore volume, and the surface hydrophilicity of TNTs, that are all easily affected by the synthetic conditions, including reaction time, synthesis temperature, acid concentration during washing, and calcination temperature (Kasuga 2006;Lee et al 2007aLee et al , 2007bLee et al , 2008aLee et al , 2008bWeng et al 2006;Yoshida et al 2005;Yu et al 2006aYu et al , 2006b. With the caion-exchange property and high specific pore volume, TNTs may offer a special environment for adsorption of cations, such as basic dyes and heavy metal ions, through the cation exchange mechanism (Lee et al 2007a(Lee et al , 2007b(Lee et al , 2008aLiu et al 2009;Nie and Teh 2010;Xiong et al 2010;Sheng et al 2011;Huang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…With the caion-exchange property and high specific pore volume, TNTs may offer a special environment for adsorption of cations, such as basic dyes and heavy metal ions, through the cation exchange mechanism (Lee et al 2007a(Lee et al , 2007b(Lee et al , 2008aLiu et al 2009;Nie and Teh 2010;Xiong et al 2010;Sheng et al 2011;Huang et al 2012). Moreover, when the sodium cations in TNTs are replaced with other organic cations (such as surfactants) from solution onto TNTs, the surface properties of TNTs (and then their adsorption ability and capacity) are altered.…”

Section: Introductionmentioning

confidence: 99%

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Effects of pore structure and surface chemical characteristics on the adsorption of organic vapors on titanate nanotubes

et al. 2012

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Effects of pore structure and surface chemical characteristics of titanate nanotubes (TNTs) on their adsorptive removal of organic vapors were investigated. TNTs were prepared via a hydrothermal treatment of TiO 2 powders in a 10 M NaOH solution at 150°C for 24 h, and subsequently washed with HCl aqueous solution of different concentrations. Effects of acid washing process (or the sodium content) on the microstructures and surface chemical characteristics of TNTs were characterized with nitrogen adsorption-desorption isotherms, FTIR, and water vapor adsorption isotherms. For the adsorption experiments, gravimetric techniques were employed to determine the adsorption capacities of TNTs for four organic vapors with similar heats of vaporization (i.e., comparable heats of adsorption) but varying dipole moments and structures, including n-hexane, cyclohexane, toluene, and methyl ethyl ketone (MEK), at isothermal conditions of 20 and 25°C. The experimental data were correlated by well-known vapor phase models including BET and GAB models. Isosteric heats of adsorption were calculated and heat curves were established. Equilibrium isotherms of organic vapors on TNTs were type II, characterizing vapor condensation to form multilayers. The specific surface area (and pore volume) and hydrophilicity of TNTs were the dominating factors for the determination of their organic vapors adsorption capacity. The GAB isotherm equation fitted the experimental data more closely than the BET equation. The heats of adsorption showed that the adsorption of organic vapors on TNTs was primarily due to physical forces and adsorbates with larger polarity might induce a stronger interaction with TNTs.

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Section: Preparation and Characterization Of Tntsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of pore structure and surface chemical characteristics on the adsorption of organic vapors on titanate nanotubes

et al. 2012

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“…The synthesized TNTs have a hydrophilic surface, exchangeable cation sites on the surface, and a high surface area and pore volume (Lee et al, 2007). Moreover, the surface characteristics of TNTs might vary with the synthesis conditions, including the reaction time, synthesis temperature, acid concentration during washing, and calcination temperature (Weng et al, 2006;Lee et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the surface characteristics of TNTs might vary with the synthesis conditions, including the reaction time, synthesis temperature, acid concentration during washing, and calcination temperature (Weng et al, 2006;Lee et al, 2008). By exploiting its properties, several researchers have used TNTs to adsorb basic dyes or cations in aqueous systems (Yoshida et al, 2005;Lee et al, 2007Lee et al, , 2010. TNTs have rarely been used for adsorbing organic vapors.…”

Section: Introductionmentioning

confidence: 99%

Sorption of Volatile Organic Compounds on Organic Substance-Modified Titanate Nanotubes

Wang

Peng

Chao

2015

Aerosol Air Qual. Res.

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This study investigates the removal of volatile organic compounds (VOCs) from the air through the use of organic substance-modified titanate nanotubes (TNTs). The TNTs were derived from TiO 2 through a hydrothermal method, and were modified using hexadecyltrimethylammonium bromide and octadecyltrichlorosilane (OTS) to change the surface hydrophilicity to hydrophobicity. The properties of the TNT and modified TNT were characterized through scanning electron microscopy , transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, contact angle measurements, and nitrogen adsorption-desorption isotherms. The fabricated adsorbents were used to remove the VOCs of toluene, ethylbenzene 1,1,2-trichloroethane, and tetrachloroethene in the air. The adsorption amounts of the VOCs were estimated using the Thomas equation. The results revealed that adsorbent modification raised the adsorption capacities of these VOCs, which also grew with increasing surface hydrophobicity. The aromatic compounds accumulated easily in the pores to generate relatively high adsorption amounts. VOCs adsorbed on the TNT surface or partitioned into the organic substance on TNTs. The adsorption amounts of VOCs on the OTSmodified TNTs were higher than those on commercial activated carbon. The results imply that organic substance-modified TNTs can effectively remove VOCs in the air and become excellent adsorbents.

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Adsorption of Cr (VI) and Textile Dyes on to Mesoporous Silica, Titanate Nanotubes, and Layered Double Hydroxides

Acharya

Naik

Parida

2018

Nanomaterials in the Wet Processing of Textiles

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Application of titanate nanotubes for dyes adsorptive removal from aqueous solution

Cited by 100 publications

References 13 publications

Effects of pore structure and surface chemical characteristics on the adsorption of organic vapors on titanate nanotubes

Effects of pore structure and surface chemical characteristics on the adsorption of organic vapors on titanate nanotubes

Sorption of Volatile Organic Compounds on Organic Substance-Modified Titanate Nanotubes

Adsorption of Cr (VI) and Textile Dyes on to Mesoporous Silica, Titanate Nanotubes, and Layered Double Hydroxides

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