Synthesis of poly(3-hexylthiophene) grafted TiO2 nanotube composite

Lu, Ming-De; Yang, Sze‐Ming

doi:10.1016/j.jcis.2009.01.073

Cited by 47 publications

(39 citation statements)

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“…In Fig. 11, the potential of the conduction band of TiO 2 NTs is −4.2 eV [36], and the work functions of Ag [37] and graphene [38] indicate −4.26 and −4.42 eV, respectively. This result suggests that the photo-induced electron transfer from the conduction band of TiO 2 NTs to Ag or graphene was due to a difference in the work function.…”

Section: Ab + Ohmentioning

confidence: 97%

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Lee¹,

Kim²,

Cho³

et al. 2015

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To improve photocatalytic efficiency, graphene/Ag/TiO 2 nanotube catalyst was synthesized, and its surface characteristics and photocatalytic activity investigated. For deposition of Ag nanoparticles on the TiO 2 nanotubes, a polymer compound containing CH 3 COOAg/poly(Llactide) was utilized, and the silver particles were precipitated by reducing the silver ions during the annealing process. Graphene deposition on the Ag/TiO 2 nanotubes was achieved using an electrophoretic deposition process. Based on the dye degradation results, it was determined that the photocatalytic efficiency was significantly affected by deposition of silver particles and graphene on the TiO 2 catalyst. Highly efficient destruction of the dye was obtained with the new graphene/Ag/TiO 2 nanotube photocatalyst. This may be attributed to a synergistic effect of the graphene and Ag nanoparticles on the TiO 2 nanotubes.

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Section: Ab + Ohmentioning

confidence: 97%

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Lee¹,

Kim²,

Cho³

et al. 2015

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“…The main process of the synthesis section is shown in Scheme 1. TiO 2 microparticles, surface modified TiO 2 microparticles with APS were prepared according to the literature [20,22], respectively. In addition, 2-formylthiophene (FT) and (E)-1,2-bis(5-formyl-2-thienyl)ethylene (EBFTE) were synthesized by Vilsmer-Haack reaction as the reported literature [24].…”

Section: Sample Preparationmentioning

confidence: 99%

“…In addition, thiophene and its derivatives are considered as a kind of promising sensitizers due to its high absorption in Vis light region. Zhu et al [21] and Lu and Yang [22] reported that polythiophene/TiO 2 and poly(3-hexylthiophene)/TiO 2 microparticles were synthesized and provided an apparent additive effect on their adsorption capacities under both UV light and Vis light.However, small molecule organic compounds modified TiO 2 are seldom reported. On the other hand, (E)-1,2-bis-(2-thienyl) ethylene [23] was reported as a kind of high performance material in Vis light region with narrow energy…”

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Preparation, characterization and photodegradation of methylene blue based on TiO2 microparticles modified with thiophene substituents

et al. 2012

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The new microparticles, 2-formylthiophene (FT)/TiO 2 and (E)-1,2-bis(5-formyl-2-thienyl) ethylene (EBFTE)/TiO 2 were synthesized with a silane coupling agent. The prepared TiO 2 composites were characterized using Ultraviolet-Vis absorption (UV-Vis), X-ray diffraction (XRD), scanning electron microscope (SEM) and thermogravimetric analyzer (TGA). Methylene blue was used as a model material to examine the photocatalytic activities of the prepared catalysts under both Ultraviolet-Vis (UV) and visible (Vis) light. The enhanced photocatalytic activities were observed in the presence of (FT)/TiO 2 and EBFTE/TiO 2 under Vis light. It suggests that FT or EBFTE plays a block or active role in the photodegradation mechanisms under UV and Vis light irradiation, respectively. Organic dyes are widely used in textile industry and the released industrial waste has caused serious damages to the water system [1][2][3][4][5]. In 1976, Carey et al. [6] first reported that TiO 2 was used as a photocatalyst in the degradation of biphenyl and chlorobiphenyls. Frank and Bard [7] studied the photocatalysis oxidation of cyanide ion with oxygen in the presence of TiO 2 powders as a heterogeneous photocatalyst. TiO 2 with the non-toxicity, chemically stability and low cost is a dramatic photocatalyst in degradation of colored water. However, TiO 2 can only make use of ultraviolet (UV) light that accounted for about 3%-5% of sunlight due to its rather broad band-gap (3.2 eV) [1]. Therefore, researches have been done to explore the mechanism of photocatalytic degradation with TiO 2 [8][9][10][11][12][13][14][15] and improvement of the degradation efficiency. Thus, some effective methods have been developed, such as dye-sensitization, ion doping and semiconductor coupling [16][17][18]. In particular, dye-sensitization is utilized to expand the spectral response region extending from UV light to visible (Vis) light. Sensitizers that showed a better energy match with the conduction band (CB) and the valence band (VB) of TiO 2 are introduced to improve the utilization efficiency of sunlight. The composites are desired to be active, Vis-responsive and highly stable [12]. For example, porphyrin/TiO 2 [19] and poly(acrylamide-co-(acrylic acid))/TiO 2 [20] were applied in photodegradation and showed high degradation efficiency. In addition, thiophene and its derivatives are considered as a kind of promising sensitizers due to its high absorption in Vis light region. Zhu et al. [21] and Lu and Yang [22] reported that polythiophene/TiO 2 and poly(3-hexylthiophene)/TiO 2 microparticles were synthesized and provided an apparent additive effect on their adsorption capacities under both UV light and Vis light.However, small molecule organic compounds modified TiO 2 are seldom reported. On the other hand, (E)-1,2-bis-(2-thienyl) ethylene [23] was reported as a kind of high performance material in Vis light region with narrow energy

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“…Studies on the chemical modification of titanate nanotubes with organosilanes, surfactants, polymers and carboxylic acids have been reported. [25][26][27][28][29][30][31][32][33] Wang et al 29 reported superficial modifications on proton-rich titanate nanotubes (H-TiNT) with carboxylic acids of different chain lengths in alcoholic solutions. A collapse of the morphology and a crystalline structure change were observed when the interaction of the H-TiNT was performed with shorter chain acids.…”

Section: Introductionmentioning

confidence: 99%

Interaction of sodium titanate nanotubes with organic acids and base: chemical, structural and morphological stabilities

Rodrigues¹,

Ferreira²,

Alves³

2010

J. Braz. Chem. Soc.

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Este trabalho relata a interação de nanotubos de titanato de sódio (Na-TiNT) com soluções aquosas de ácido benzóico, ácido fenilfosfônico e anilina. Os Na-TiNT foram obtidos através do tratamento hidrotérmico de TiO 2 em solução aquosa de NaOH. Os resultados obtidos através de FTIR, XRD, TEM e análise elementar mostraram que a estabilidade química, estrutural e morfológica dos nanotubos está relacionada à natureza química do meio (básico ou ácido) e às condições de tratamento (temperatura e tempo de contato). A fase α-fenilfosfonato de titânio(IV) foi formada a partir da interação dos Na-TiNT com ácido fenilfosfônico; a quantidade da nova fase foi dependente do tempo de contato e sua cristalinidade da temperatura. Porém, TiO 2 ou nanotubo de titanato contendo H + foram obtidos, em função das condições de tratamento, a partir da interação dos Na-TiNT com ácido benzóico. Quando os Na-TiNT interagiram com a anilina nenhuma mudança estrutural, morfológica ou composicional foi observada.This work reports the interaction of sodium titanate nanotubes (Na-TiNT) with aqueous solutions of benzoic and phenylphosphonic acids and of aniline. The Na-TiNT were obtained from hydrothermal treatment of TiO 2 in aqueous NaOH solution. The results obtained from FTIR, XRD, TEM and elemental analyses showed that the chemical, structural and morphological stability of the nanotubes is related to the medium (acidic or basic) and to the treatment conditions (temperature and contact time). A titanium(IV) α-phenylphosphonate phase was obtained from interaction between Na-TiNT and phenylphosphonic acid. The amount and crystallinity of the new phase were dependent of the contact time and temperature, respectively. On the other hand, TiO 2 or protonrich titanate nanotubes were formed, depending on treatment conditions, from interaction between Na-TiNT and benzoic acid. When Na-TiNT interacted with aniline, no chemical, morphological or compositional change was observed.Keywords: titanium oxide, titanium oxide nanotubes, phase transformation, adsorption, carboxylic acid IntroductionIntensive investigation on physical and chemical properties of inorganic one-dimensional (1D) nanostructures such as nanotubes, nanofibers and nanorods has been reported. 1 In particular, titanate nanotubes have attracted great attention from the scientific community due to their potential applications in biosensors, electronic, optical, magnetic, electrochromic and solar cell devices, as well as in heterogeneous photocatalysis. [2][3][4][5][6][7][8][9] Additionally, 1D titanate nanostructures have also been used as support for the immobilization of myoglobin, 10 and as host for platinum oxide and lithium intercalation. 11,12 Titanate nanotubes can be prepared by hydrothermal treatment of TiO 2 powders (anatase or rutile) in aqueous NaOH solutions. 13,14 Although the preparation method is very simple, there is still a great debate in the literature related to the atomic structure and chemical composition of the nanotubes produced by this method. The exact determina...

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Synthesis of poly(3-hexylthiophene) grafted TiO2 nanotube composite

Cited by 47 publications

References 32 publications

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Preparation, characterization and photodegradation of methylene blue based on TiO2 microparticles modified with thiophene substituents

Interaction of sodium titanate nanotubes with organic acids and base: chemical, structural and morphological stabilities

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Synthesis of poly(3-hexylthiophene) grafted TiO2 nanotube composite

Cited by 47 publications

References 32 publications

Photocatalytic performance of graphene/Ag/TiO2hybrid nanocomposites

Photocatalytic performance of graphene/Ag/TiO2hybrid nanocomposites

Preparation, characterization and photodegradation of methylene blue based on TiO2 microparticles modified with thiophene substituents

Interaction of sodium titanate nanotubes with organic acids and base: chemical, structural and morphological stabilities

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Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites