Enhancement of absorbing frequency and photo-catalytic performance by temperature treatment of composites Fe3O4-AC nanoparticle

Ilyas, Sultan; Abdullah, Bualkar; Tahir, Dahlang

doi:10.1016/j.apt.2019.11.007

Cited by 17 publications

(14 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…20,25,26,39,49,50,79,80 more vital interaction between the C 1s from AC with the Fe 3d and O 2p from Fe 2 O 3 makes the top of the valence bands become thin. 48 The bottom of the conduction bands is also changed after the introduction of AC into the composite Fe 2 O 3 −carbon. The mixing of the C 1s states at the valence band edge decreases the valence bandwidth; the increase of the band gap increases the amount of AC probably due to the formation of C 1−x (Fe 2 O 3 ) x .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

et al. 2021

Self Cite

View full text Add to dashboard Cite

Visible-light absorption is a critical factor for photocatalyst activity and absorption of electromagnetic (EM) interference application. The band gap of Fe 2 O 3 is 2 eV, which can be increased by doping with a high-band-gap material such as carbon from activated carbon (AC) with a band gap of 4.5 eV for increased visible-light absorption. The porosity decreases from 88 to 81.6%, and the band gap increases from 2.14 to 2.64 eV by increasing the AC from 10 to 25%, respectively. The photocatalytic activity takes 120 min to produce a harmless product for 10− 20% AC, but 25% AC shows 89.5% degradation in only 90 min and the potential to attenuate the EM wave up to 99% due to the RL being below −20 dB. The secondand third-cycle degradation achieved by the composite Fe 2 O 3 −AC having 25% AC is 88.2 and 86.5% in 90 min, respectively. The pore of the surface state of AC contains a trapped charge, and interaction occurs between the charge (electron/hole) and O 2 or H 2 O to produce OH and superoxide (O 2 − ) radicals. These radicals move inside the molecule of the pollutant (methylene blue (MB)) to break up the bond, with the final products being H 2 O and CO 2 . The X-ray photoelectron (XPS) spectra show that oxygen plays a key role in the interatomic bonding with Fe, C, and MB atoms. The best absorption of EM interference is −21.43 dB, with degradation reaching 89.51% in only 90 min for 25% AC due to its higher band gap and anisotropy constant. Fe 2 O 3 −carbon is a multifunctional material for the green environment because of its electromagnetic interference absorption and photodegradation of wastewater.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…73 This material also has high optical transparency, excellent thermal conductivity, high hole mobility, and others, which are very suitable for use as CE. 83,86,87 The addition of honeycomb-shaped graphene to the semiconducting TiO 2 layer can increase the adsorption photons of dyes. The increase in photons absorption affects the mobility of electrons and consequently improving photovoltaic performance.…”

Section: And (D) Comparison Of Photoconversion Efficiency From Graphs (A) To (C)mentioning

confidence: 99%

“…Graphene has a hexagonal shape resembling honeycomb and has advantages such as high electrical and thermal stability and desired optical and mechanical properties 73 . This material also has high optical transparency, excellent thermal conductivity, high hole mobility, and others, which are very suitable for use as CE 83,86,87 …”

Section: Dyes As Photosensitizersmentioning

confidence: 99%

Review effect of various types of dyes and structures in supporting performance of dye‐sensitized solar cell TiO ₂ ‐based nanocomposites

Mujtahid

Gareso

Armynah

et al. 2021

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

The energy demand for supporting the activity of human life is increasing where fossil fuels decreasing sharply every year and have an impact on increasing CO 2 emissions in the environment. An alternative solution for providing practical energy needs is using renewable energy such as solar cells. For environmentally friendly, economical, and efficient concepts, dye-sensitized solar cell (DSSC) is a promising alternative for the photovoltaic field. The performance of a DSSC depends on many factors, such as electron collection at the photoanode, photoanode light-harvesting efficiency, and others. In this review article, we observe the influence of synthetic and natural dye materials on light-harvesting efficiency at photoanodes. The chemical structure of dyes plays an essential role in increasing photon absorption, thereby increasing electron injection and conversion efficiency. In addition to dyes, we also reviewed the influence of the shape of the DSSC structure, namely the sandwich, monolithic, and honeycomb structures, on the performance of DSSCs.This approach helps develop a narrative about the potential and relationship of dyes and structure in increasing efficiency as a guide for synthesizing new materials in the future.

show abstract

“…At the lowest temperature, there are some small peaks that occur at 2θ: From the XRD spectra in Figure 3 clearly shows relationship between calcination temperatures with the peak intensities. At low calcination temperature (500 o C) the intensity of diffraction peaks are sharp and decrease with increasing the calcination temperature, consequently decrease the crystallite size as can be seen in Table 1 calculated from the Debye Scherrer's equation [3,60,61]:…”

Section: Xrd Analysismentioning

confidence: 99%

“…Based on the previous reported which published by Selvi et.al, a diminution of the crystallite size led to an increase in the specific surface area that could enhance the active reaction of the photocatalyst materials [75]. (kr) in the photocatalytic reaction was calculated by the following equation [60,64]:…”

Section: Bandgap and Photocatalytic Degradationmentioning

confidence: 99%

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Composite ZnO/TiO2 have been successfully synthesized by green synthesis method with various calcination temperature 500oC, 600oC, 700oC, and 800oC (TiO2 concentrations: 2.5 g and 5 g) for photocatalyst application. In this study, Calopogonium mucunoides leaf extract was used as reducing and stabilizing agent. The synthesized composites were characterized by using Fourier Transform Infra-Red (FTIR), X-Ray Diffraction (XRD), and UV-Visible spectroscopy. The XRD spectra shows the hexagonal phase with wurtzite structure of ZnO and anatase for TiO2. The best degradation performance is 98.26% (only 10 min) for ZnO/TiO2 (5 g) with calcination temperature is 800oC. This is due to the highest distance between two optical phonon mode Δ(LO-TO) and lowest attenuating and propagating constant. The composite ZnO/TiO2 shows high potentials photodegradation of organic dyes with the high stable recyclability up to 5 cycles (> 95%) only for every 15 minutes. High potentials for applicability with the concept environmentally friendly principles and stability for circular chemistry, and efficiency of use the energy and chemicals.

show abstract

Enhancement of absorbing frequency and photo-catalytic performance by temperature treatment of composites Fe3O4-AC nanoparticle

Cited by 17 publications

References 36 publications

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Review effect of various types of dyes and structures in supporting performance of dye‐sensitized solar cell TiO ₂ ‐based nanocomposites

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Contact Info

Product

Resources

About

Enhancement of absorbing frequency and photo-catalytic performance by temperature treatment of composites Fe3O4-AC nanoparticle

Cited by 17 publications

References 36 publications

Enhanced Visible-Light Absorption of Fe2O3 Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Enhanced Visible-Light Absorption of Fe2O3 Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Review effect of various types of dyes and structures in supporting performance of dye‐sensitized solar cell TiO 2 ‐based nanocomposites

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Contact Info

Product

Resources

About

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Review effect of various types of dyes and structures in supporting performance of dye‐sensitized solar cell TiO ₂ ‐based nanocomposites