Morphology-controllable polycrystalline TiO2 nanorod arrays for efficient charge collection in dye-sensitized solar cells

Zhong, Peng; Ma, Xiaohua; Chen, Xinpeng; Zhong, Rong; Liu, Xuehong; Ma, Dongjie; Zhang, Maolin; Li, Zhimin

doi:10.1016/j.nanoen.2015.06.007

Cited by 38 publications

(19 citation statements)

References 70 publications

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“…When the growth reaction rate is higher than etching reaction rate, growth of TiO2 nanorod array was occurred anisotropically on FTO substrate [15,16] .…”

Section: Ttip + Hcl + H2omentioning

confidence: 99%

Synthesis of Nanostructure TiO2 Nanorod Array on FTO Substrate using Hydrothermal Method and its Photocatalytic Activity

Suryawanshi¹

2018

IJRASET

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In this work, one dimensional TiO2 nanorods array (NRA) was prepared by using hydrothermal method. The TiO2 NRA was grown on FTO substrate without using seed layer substrate. The effect of hydrothermal temperature and time on the morphology of TiO2 NRA was studied. The synthesized TiO2 nanostructure was characterized by different techniques. The structural properties were studied using X-Ray diffraction (XRD) technique, The morphological studied was done with Field emission scanning electron microscope (FE-SEM), UV-Visible spectroscopy and photoluminescence (PL) were used to evaluate optical properties of synthesized TiO2 nanostructures. The results showed that synthesized TiO2 nanorod array were grown vertically on FTO substrate with average diameter 50 nm and length up to 1 µm was achieved at about 1 µm. The photodegradation performance of TiO2 NRA was also studied and it was achieved up to 47% in 180 min under UV irradiation. Keywords: TiO2, nanorod array, photocatalyst, surface defects, hydrothermal I. INTRODUCTION TiO2 is a wide band gap (3.2 eV) semiconductor metal oxide has unique properties such as low-cost, non toxic, chemical stability and long-term photostability are useful for variety of applications. The one-dimensional TiO2 nanostructure such as nanorod array and nanotubes grown vertically on substrate have received considerable attention due to its higher surface to volume ratio, large number of active site and surface defects favorable for photocatalytic application [1][2][3] . The nanostructures of TiO2 have variety of application in water splitting, photodetector, dye sensitized solar cell, gas sensor and photocatalytic degradation of organic compounds [4][5][6][7][8] . Currently, vertically aligned single crystal rutile TiO2 nanorod array grown on substrate have a considerable interest due to its ability to suppress electron and hole recombination than polycrystalline TiO2 which is useful in dye sensitized solar cell, photodetector, photocatalyst and water splitting [9,10] . The rutile TiO2 NRA can be synthesized using various techniques such Liu and Aydil have been developed standard method to synthesize 001 oriented rutile TiO2 nanorod array on FTO substrate using low temperature hydrothermal route [11] . The photocatalytic properties of rutile TiO2 NRA for the degradation of organic compound have been studied by few researchers. Gao et [12] synthesized oriented single crystal rutile TiO2 NRA on seed layer deposited quartz glass substrate and its photocatalytic efficiency was found to 87% under irradiation of 254 nm UV light. Hwang et [13] a studied spectroscopic analysis of hydrothermally synthesized TiO2 NRA on FTO at temperature 200 o C with different growth time. He found that oxidation rate of 2-aminothiophenol using TiO2 NRA was found to be increased growth time. Daniela et al [14] was synthesized nanostructure of TiO2 nanorod array on PET substrate. The photocatalytic degradation rate under UV light was found to be 61% for the degradation of Rhodamine B dye. In above mention...

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“…When the growth reaction rate is higher than etching reaction rate, growth of TiO2 nanorod array was occurred anisotropically on FTO substrate [15,16] .…”

Section: Ttip + Hcl + H2omentioning

confidence: 99%

Synthesis of Nanostructure TiO2 Nanorod Array on FTO Substrate using Hydrothermal Method and its Photocatalytic Activity

Suryawanshi¹

2018

IJRASET

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“…Recently, one type of technologies based on photoelectrochemical (PEC) reactions is expected as a potential route to solve the problems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These technologies share some features in common, including utilization of nanostructured or molecular semiconductors to harvest sunlight, and conversion of solar energy into fuels or electricity by electrochemical reactions, etc.…”

Section: Introductionmentioning

confidence: 99%

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Zhong

Guo

et al. 2016

J Solid State Electrochem

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In this work, the capping layer atop anodic TiO 2 nanotube arrays (NTAs), which hinders filling of other guest materials and transport of charge carriers, is discerned to be TiO 2 nanotapes. Then, it is completely removed by a novel sonication-polishing (SP) treatment, after which Sb 2 S 3 is subsequently introduced to fill the nanotubes by chemical bath deposition. The morphological, structural, and optical properties of the SP-treated TiO 2 NTAs and TiO 2 NTAs/Sb 2 S 3 heterogeneous structures are characterized systematically. The results indicate that SP treatment opens the tops of nanotubes with diameters of ∼120 nm, which endure a phase conversion from amorphous to anatase after calcination at 450°C; besides, stibnite Sb 2 S 3 with a band gap of ∼1.75 eV inside the TiO 2 networks is formed upon heat treatment at 330°C in Ar, which enhances the absorption in visible light range. The photoelectrochemical (PEC) and photovoltaic properties for the SP-treated TiO 2 NTAs are investigated. Results shows that the photoresponse of TiO 2 NTAs is improved by the SP treatment, and the photocurrent for the TiO 2 NTAs/Sb 2 S 3 electrode is substantially enhanced as compared to the bare TiO 2 one. A high efficiency of 6.28 % is achieved in a TiO 2 NTAs/Sb 2 S 3 PEC cell. In addition, charge recombination in the photoanode of dye-sensitized solar cells (DSSCs) is observed to be greatly retarded by using the SP-treated TiO 2 NTAs as compared to TiO 2 nanoparticles (NPs). Thus, the SP anodic TiO 2 NTAs are promising in applications in various PEC areas such as photocatalysis and sensitized solar cells.

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“…Particle Swarm Optimization Algorithm (PSO) is one of swarm intelligence optimization algorithms [2], it is belongs to random searching algorithms [1]. In 1995 Eberhart and Kennedy proposed PSO algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…The UD have been successfully applied in many fields, such as manufacturing, sciences and engineering, since Wang and Fang (1981) first introduced the concept of uniform design. In the reference [1], PSO algorithm based on uniform design (UD-PSO) is proposed by used combining the UD and PSO algorithm. This algorithm thinks about the uniformity of the particle swarm distribution and the memory characteristic of particles.…”

Section: Introductionmentioning

confidence: 99%

A Particle Swarm Optimization Algorithm Based on Uniform Design

Al-Mter¹,

Lu²

2016

IJDKP

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The Particle Swarm Optimization (PSO) Algorithm is one of swarm intelligence optimization algorithms. Usually the population's values of PSO algorithm are random which leads to random distribution of search quality and search velocity. This paper presents PSO based on uniform design (UD). UD is widely used in various applications and introduced to generate an initial population, in which the population members are scattered uniformly over the search space. In evolution, UD is also introduced to replace some worse individuals. Based on abovementioned these technologies a Particle Swarm Optimization Algorithm based on Uniform Design (PSO-UD) algorithm is proposed. At last, the performance of PSO-UD algorithm is tested and compared. Tests show that the PSO-UD algorithm faster than standard PSO algorithm with random populations.

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Morphology-controllable polycrystalline TiO2 nanorod arrays for efficient charge collection in dye-sensitized solar cells

Cited by 38 publications

References 70 publications

Synthesis of Nanostructure TiO2 Nanorod Array on FTO Substrate using Hydrothermal Method and its Photocatalytic Activity

Synthesis of Nanostructure TiO2 Nanorod Array on FTO Substrate using Hydrothermal Method and its Photocatalytic Activity

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

A Particle Swarm Optimization Algorithm Based on Uniform Design

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