Synthesis, characterization and effect of calcination temperature on phase transformation and photocatalytic activity of Cu,S-codoped TiO2 nanoparticles

Hamadanian, Masood; Reisi‐Vanani, Adel; Majedi, Ali

doi:10.1016/j.apsusc.2009.10.016

Cited by 157 publications

(89 citation statements)

References 54 publications

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“…carbon (C) and iodine (I) are similarly used as dopants to improve the performance and properties of TiO 2 [101]. The co-doping technique generates synergistic effects which enhance the properties of the final TiO 2 product [74,[96][97][98][99][100][101][102][103][104][105][106][107][108][109]. For example, when W and N are co-doped to TiO 2 , the excited electrons are easily transferred from valence band into the new conduction band due to the narrowing of the band gap difference, while the recombination of free electrons and holes are not permitted [98].…”

Section: Effect Of Codopingmentioning

confidence: 99%

“…For example, Cu is applied in the co-doping technique to slow the growth of crystallite size of the TiO 2 by forming a complex with oxygen on the surface of TiO 2 . At the same 8 [108] time, Cu also prohibits the phase transformation from the anatase phase to the rutile phase [103]. carbon (C) and iodine (I) are similarly used as dopants to improve the performance and properties of TiO 2 [101].…”

Section: Effect Of Codopingmentioning

confidence: 99%

See 1 more Smart Citation

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Tan

Wong

Mohamed

2011

ISRN Materials Science

112

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This paper aims to review and summarize the recent works on the photocatalytic degradation of various organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. In this regard, three main aspects are examined: (a) the presence of various dopants (metal dopants, nonmetal dopants, halogen dopants, metalloid dopants, and codopants) in the formation of nano-doped-TiO 2 photocatalysts, (b) the effect of the presence of dopants on the photocatalytic degradation of organic pollutants, and (c) the effects of various operating parameters on the photocatalytic degradation of organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. Reports resulted suggest that the formation of a high percentage of the anatase phase, small crystallite size, and high specific surface area of the nano-doped-TiO 2 photocatalysts depends on the presence of various dopants in the photocatalysts. The majority of the dopants have the potential to improve the photocatalytic efficiency of nano-doped-TiO 2 in the degradation of organic pollutants. The photocatalytic degradation of organic compounds depends on the calcination temperature of the prepared doped TiO 2 , initial reactant concentration, dosage of doped TiO 2 , and dopant doping concentration.

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Section: Effect Of Codopingmentioning

confidence: 99%

Section: Effect Of Codopingmentioning

confidence: 99%

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Tan

Wong

Mohamed

2011

ISRN Materials Science

112

View full text Add to dashboard Cite

show abstract

“…The wide band gap (Eg [ 3.2 eV) of TiO 2 limits its potential, because only high energy light in the UV region with wavelengths \387 nm can instigate the electron-hole separation process [156,163]. Therefore, developing a photocatalyst that can efficiently harness the energy from natural sunlight, i.e., from the visible region, is one of the major challenges in this field [164]. Numerous modifications of the structure of TiO 2 have been made to achieve the following: (i) decrease the band gap energy to harness the photons from the visible region; (ii) increase the efficiency of electron-hole production; and (iii) augment the absorbency of organic pollutants onto TiO 2 by appropriate surface modifications [148,149,165].…”

Section: Titanium Dioxide As Photocatalystsmentioning

confidence: 99%

Metal oxide semiconducting interfacial layers for photovoltaic and photocatalytic applications

Elumalai

Chellappan

Jose

et al. 2015

Mater Renew Sustain Energy

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The present review rationalizes the significance of the metal oxide semiconductor (MOS) interfaces in the field of photovoltaics and photocatalysis. This perspective considers the role of interface science in energy harvesting using organic photovoltaics (OPVs) and dye-sensitized solar cells (DSSCs). These interfaces include large surface area junctions between photoelectrodes and dyes, the interlayer grain boundaries within the photoanodes, and the interfaces between photoactive layers and the top and bottom contacts. Controlling the collection and minimizing the trapping of charge carriers at these boundaries is crucial to overall power conversion efficiency of solar cells. Similarly, MOS photocatalysts exhibit strong variations in their photocatalytic activities as a function of band structure and surface states. Here, the MOS interface plays a vital role in the generation of OH radicals, which forms the basis of the photocatalytic processes. The physical chemistry and materials science of these MOS interfaces and their influence on device performance are also discussed.

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“…Hamadanian et al tested photocatalytic activity of the copper and sulfur codoped TiO 2 photocatalyst for degradation of methyl orange (MO) solutions [11]. The hotocatalytic activity of undoped TiO 2 calcinated at 500-700°C and 0.1% Cu, S-codoped TiO 2 calcinated at 500 and 700-850°C was tested under UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature and calcination time on the kaolinite/tio2 composite for photocatalytic reduction of CO2

Reli¹,

Kočí²,

Matějka³

et al. 2012

GeoScience Engineering

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The kaolinite/TiO 2 composite (60 wt% of TiO 2 ) was prepared by thermal hydrolysis of a raw kaolin suspension in titanyl sulphate and calcined at different temperatures (600, 650 and 700°C) and for different times (1, 2 and 3 h). The obtained samples were characterized by XRPD, N 2 physical adsorption and SEM, and tested for photocatalytic reduction of CO 2 . The different calcination conditions did not influence TiO 2 phase composition, only slightly changed the specific surface area, and significantly affected crystallite size of kaolinite/TiO 2 composite. A higher temperature and longer duration of calcination lead to higher crystallinity of the powder. The photocatalytic results showed that the crystallite size determined the efficiency of kaolinite/TiO 2 photocatalysts. AbstraktKompozit kaolinit/TiO 2 (60 hm% TiO 2 ) byl připraven termální hydrolýzou suspenze surového kaolinu v síranu titanylu a kalcinován při různých teplotách (600, 650 a 700°C) a po různou dobu (1, 2 a 3 h). Získaný vzorek byl charakterizován pomocí XRPD, N 2 fyzikální adsorpcí a SEM, a testován na fotokatalytickou redukci CO 2 . Rozdíl kalcinačních podmínek neovlivnil složení fáze TiO 2 , pouze se mírně pozměnila specifická povrchová plocha a výrazně byla ovlivněna velikost krystalitu kompozitu kaolinit/TiO 2 . Vyšší teplota a delší doba kalcinace vedly k vyšší krystalitě prášku. Fotokatalytické výsledky ukázaly, že velikost krystality určuje účinnost fotokatalyzítoru kaolinit/TiO 2 .

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Synthesis, characterization and effect of calcination temperature on phase transformation and photocatalytic activity of Cu,S-codoped TiO2 nanoparticles

Cited by 157 publications

References 54 publications

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Metal oxide semiconducting interfacial layers for photovoltaic and photocatalytic applications

Effect of calcination temperature and calcination time on the kaolinite/tio2 composite for photocatalytic reduction of CO2

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