A high activity adsorbent of ZnO–Al2O3 nanocomposite particles: Synthesis, characterization and dye removal efficiency

Tajizadegan, Hamid; Jafari, Morad; Rashidzadeh, Mehdi; Saffar‐Teluri, Ali

doi:10.1016/j.apsusc.2013.03.089

Cited by 59 publications

(25 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although many papers on various kinds of synthesis have been published, synthesis of ZnCr 2 O 4 via a homogeneous precipitation through urea hydrolysis has not been reported yet. The homogeneous precipitation through urea hydrolysis has been considered an ideal chemical solution method to synthesize a wide range of metal oxides, and it offers several advantages over the conventional precipitation routes . The main advantage is the molecular level mixing due to lack of the concentration gradient in the solution which results from the homogeneous and gradual hydrolysis of urea.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Tajizadegan

Heidary

Torabi

et al. 2015

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

In situ and homogeneous hydrolysis of urea was utilized to design a homogeneous precipitation method to synthesize the ZnCr2O4 functional material. The as‐prepared nanospinel was systematically studied in terms of crystal structure, morphology, texture, and light absorption. A well‐crystalline single phase of ZnCr2O4 nanospinel with a spongy network structure was obtained. Transmission electron microscopy and X‐ray diffraction observations confirmed the formation of monocrystalline nanoparticles of ZnCr2O4 with the nanosize of 13 nm. The synthesized nanospinel showed a low direct band gap value of 1.8 eV with appropriate absorption in the visible light region, which was a remarkable result for this route.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Tajizadegan

Heidary

Torabi

et al. 2015

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…7 shows the spectra obtained. They show that the cells containing Al adsorbed more dye, which is common in samples with different types of particles [32]. To understand the increase in dye adsorbed onto semiconductors containing Al, BET surface area measurements and an analysis of the pore size distribution were performed.…”

Section: Photovoltaic Characterizationmentioning

confidence: 99%

Incorporation of Al-(hydr)oxide species onto the surface of TiO 2 nanoparticles: Improving the open-circuit voltage in dye-sensitized solar cells

et al. 2015

View full text Add to dashboard Cite

“…In particular, a hypothesis to explain the improved injection of electrons is still controversial. In this work, unlike the existing mixture method [15,16], we produced Al 2 O 3 and TiCl 4 solutions. Then, the photoelectrode was treated with a double coating of the Al 2 O 3 and TiCl 4 solution.…”

Section: Introductionmentioning

confidence: 96%

Al2O3 Doping of TiO2 electrodes and applications in dye-sensitized solar cells

Eom

Kim

Bark

et al. 2014

Journal of the Korean Physical Society

View full text Add to dashboard Cite

Dye-sensitized solar cells (DSSCs) have been intensively studied since their discovery in 1991. DSSCs have been extensively researched over the past decades as cheaper alternatives to silicon solar cells due to their high energy-conversion efficiency and their low production cost. However, some problems need to be solved in order to enhance the efficiency of DSSCs. In particular, the electron recombination that occurs due to the contact between the transparent conductive oxide (TCO) and a redox electrolyte is one of the main limiting factors of efficiency. In this work, we report for the first time the improvement of the photovoltaic characteristics of DSSCs by doping TiO2 with Al2O3. DSSCs were constructed using composite particles of Al2O3-doped TiO2 and TiO2 nanoparticles. The DSSCs using Al2O3 showed the maximum conversion efficiency of 6.29% due to effective electron transport. DSSCs based on Al2O3-doped TiO2 films showed better photovoltaic performance than cells fabricated with only TiO2 nanoparticles. This result is attributed to the prevention of electron recombination between electrons in the TiO2 conduction band with holes in the dye or the electrolyte. There mechanism is suggested based on impedance results, which indicated improved electron transport at the TiO2/dye/electrolyte interface.

show abstract

A high activity adsorbent of ZnO–Al2O3 nanocomposite particles: Synthesis, characterization and dye removal efficiency

Cited by 59 publications

References 20 publications

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Incorporation of Al-(hydr)oxide species onto the surface of TiO 2 nanoparticles: Improving the open-circuit voltage in dye-sensitized solar cells

Al2O3 Doping of TiO2 electrodes and applications in dye-sensitized solar cells

Contact Info

Product

Resources

About

A high activity adsorbent of ZnO–Al2O3 nanocomposite particles: Synthesis, characterization and dye removal efficiency

Cited by 59 publications

References 20 publications

Synthesis and Characterization of ZnCr2O4 Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Synthesis and Characterization of ZnCr2O4 Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Incorporation of Al-(hydr)oxide species onto the surface of TiO 2 nanoparticles: Improving the open-circuit voltage in dye-sensitized solar cells

Al2O3 Doping of TiO2 electrodes and applications in dye-sensitized solar cells

Contact Info

Product

Resources

About

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis

Synthesis and Characterization of ZnCr₂O₄ Nanospinel Prepared via Homogeneous Precipitation Using Urea Hydrolysis