scholarly journals Superparamagnetic Iron Oxide Decorated Indium Hydroxide Nanocomposite: Synthesis, Characterization and Its Photocatalytic Activity

2021 ◽  
Vol 17 (1) ◽  
pp. 113-126
Author(s):  
C. Y. Chong ◽  
T. H. W. Lee ◽  
J. C. Juan ◽  
Mohd Rafie Johan ◽  
C. F. Loke ◽  
...  
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Fe3o4 Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Indium Hydroxide ◽  
Mean Width ◽  
Visible Light Driven ◽  
Good Potential ◽  
Co Precipitation ◽  
Magnetic Recoverability

A simple and scalable liquid-based method was developed to produce a nanocomposite photocatalyst which was comprised of Fe3O4 nanoparticles (4-5 nm) decorated indium hydroxide nanorods (mean width 33 nm and average aspect ratio 2-3). The nanocomposite was produced at 25 ℃ in water via a hydroxide-induced co-precipitation ensued by a cathodic reduction during which the non-magnetic Fe(OH)3 intermediate was reduced to magnetic Fe3O4 at 20 V within 1 h. The incorporation of Fe3O4 nanoparticles served to bestow magnetic recoverability to the photocatalyst and helped enhance visible light absorption simultaneously. Interestingly, the addition of Fe3+ led to the formation of In(OH)3 nanorods rather than the commonly observed nanocubes. In comparison to the In(OH)3 system having a band gap of 4.60 eV), the band gap of the Fe3O4/In(OH)3 nanocomposite produced was determined to be 2.85 eV using the Tauc’s plot method. The effective reduction in band gap is expected to allow better absorption of visible light which in turns should help boost its photocatalytic performance. The Fe3O4/In(OH)3 nanocomposite was structurally characterized using a combination of PXRD, FESEM, EDS, and TEM and its paramagnetic property was proven with a positive mass susceptibility measured to be 1.30´10−5 cm3.g−1. Under visible light, a photocatalytic degradation efficiency of 83% was recorded within 1 hr for the nanocomposite using methylene blue as a dye. The photocatalytically-active Fe3O4/In(OH)3 should have good potential in visible-light driven waste water degradation once further optimized. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Band‐Gap and Charge Transfer Engineering in Red Phosphorus‐Based Composites for Enhanced Visible‐Light‐Driven H 2 Evolution

2020 ◽  
Vol 26 (10) ◽  
pp. 2285-2292 ◽  
Author(s):  
Ying Xuan ◽  
Huiying Quan ◽  
Zhurui Shen ◽  
Chenxi Zhang ◽  
Xiyuan Yang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Band Gap ◽  
Red Phosphorus ◽  
Visible Light Driven

Band Gap Tuning of ZnO/In2S3 Core/Shell Nanorod Arrays for Enhanced Visible-Light-Driven Photocatalysis

2013 ◽  
Vol 117 (11) ◽  
pp. 5558-5567 ◽  
Author(s):  
Sunita Khanchandani ◽  
Simanta Kundu ◽  
Amitava Patra ◽  
Ashok K. Ganguli
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Core Shell ◽  
Nanorod Arrays ◽  
Visible Light Driven ◽  
Band Gap Tuning

N-Loaded TiO2 for Photocatalytic Degradation of Methyl Orange under Visible Light Irradiation

2012 ◽  
Vol 622-623 ◽  
pp. 883-888
Author(s):  
Natkritta Boonprakob ◽  
Natda Wetchakun ◽  
Sukon Phanichphant ◽  
Jun Chen ◽  
Burapat Inceesungvorn
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Band Gap ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Band Gap Energy ◽  
Light Irradiation ◽  
Gap Energy ◽  
Visible Light Driven ◽  
Degradation Of Methyl Orange

Nitrogen-loaded TiO2(N-loaded TiO2), a visible-light driven catalyst, was successfully synthesized by the modified sol-gel method. Physical characterizations of the as-prepared catalysts have been performed by using X-ray diffraction (XRD), Diffuse reflectance UVvisspectroscopy(DRUVvis), Raman spectroscopyand BETspecific surface areain order to obtain structure-activity relationship. Results from Raman spectroscopy clearly suggested that N atoms were incorporated into the TiO2crystal lattice as evidenced by the vibrational peak of TiN in TiO2-xNx.DR UVvis results also suggested that the nitrogen dopant might be responsible for narrowing the TiO2band gap energy, thus resulting in a shift towards the visiblelight region. Photocatalytic activity of N-loaded TiO2evaluated through the degradation of methyl orange (MO)under visible light irradiation (l> 400 nm) indicated that all N-loaded photocatalysts exhibited significantly higher activities than the unloaded TiO2and Degussa P25 TiO2. According to the results from DR UV-vis, XRD and BET studies, the enhanced photoactivity observed from N-loaded samples might be due to a decrease in TiO2band gap energy and/or changes in chemical and physical properties of the materials upon loading with nitrogen.

scholarly journals Correction: Band-gap tailoring and visible-light-driven photocatalytic performance of porous (GaN)1−x(ZnO)x solid solution

2017 ◽  
Vol 46 (14) ◽  
pp. 4860-4860
Author(s):  
Aimin Wu ◽  
Jing Li ◽  
Baodan Liu ◽  
Wenjin Yang ◽  
Yanan Jiang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Visible Light ◽  
Band Gap ◽  
Photocatalytic Performance ◽  
Dalton Trans ◽  
Visible Light Driven ◽  
Band Gap Tailoring

Correction for ‘Band-gap tailoring and visible-light-driven photocatalytic performance of porous (GaN)1−x(ZnO)x solid solution’ by Aimin Wu et al., Dalton Trans., 2017, 46, 2643–2652.

Band-gap tailoring and visible-light-driven photocatalytic performance of porous (GaN)1−x(ZnO)x solid solution

2017 ◽  
Vol 46 (8) ◽  
pp. 2643-2652 ◽  
Author(s):  
Aimin Wu ◽  
Jing Li ◽  
Baodan Liu ◽  
Wenjin Yang ◽  
Yanan Jiang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Visible Light ◽  
Band Gap ◽  
Photocatalytic Performance ◽  
Phenol Degradation ◽  
Band Gaps ◽  
Visible Light Driven ◽  
Band Gap Tailoring

(GaN)1−x(ZnO)x solid solution photocatalysts with tunable band-gaps have been synthesized and exhibited superior photocatalytic performance on phenol degradation after Ag decoration under visible light.

Photocatalysis and solar hydrogen production

2007 ◽  
Vol 79 (11) ◽  
pp. 1917-1927 ◽  
Author(s):  
Akihiko Kudo
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Band Gap ◽  
Water Splitting ◽  
Environmental Issues ◽  
Apparent Quantum Yield ◽  
Solar Hydrogen ◽  
Visible Light Driven ◽  
Solar Hydrogen Production ◽  
Narrow Band Gap Semiconductors

Photocatalytic water splitting is a challenging reaction because it is an ultimate solution to energy and environmental issues. Recently, many new powdered photocatalysts for water splitting have been developed. For example, a NiO (0.2 wt %)/NaTaO3:La (2 %) photocatalyst with a 4.1-eV band gap showed high activity for water splitting into H2 and O2 with an apparent quantum yield of 56 % at 270 nm. Overall water splitting under visible light irradiation has been achieved by construction of a Z-scheme photocatalysis system employing visible-light-driven photocatalysts, Ru/SrTiO3:Rh and BiVO4 for H2 and O2 evolution, and an Fe3+/Fe2+ redox couple as an electron relay. Moreover, highly efficient sulfide photocatalysts for solar hydrogen production in the presence of electron donors were developed by making solid solutions of ZnS with AgInS2 and CuInS2 of narrow band gap semiconductors. Thus, the database of powdered photocatalysts for water splitting has become plentiful.

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