Synthesis, characterization, and photocatalytic performance of methyl orange in aqueous TiO2 suspension under UV and solar light irradiation

Al-Mamun, Md. Rashid; Hossain, Khan Tanjir; Mondal, Saikat; Khatun, Most. Afroza; Islam, Md. Shahinoor; Khan, Dr. Md. Zaved Hossain

doi:10.1016/j.sajce.2022.02.002

Cited by 20 publications

(9 citation statements)

References 41 publications

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“…As shown in Figure 3, Fe−TiO 2 samples could better correspond to the Raman vibration mode of the standard anatase-phase structure; peaks appear at 144 cm −1 (E g ), 197 cm −1 (E g ), 397 cm −1 (B 1g ), 515 cm −1 (A 1g + B 1g ), and 638 cm −1 (E g ). 48 The similar Raman pattern of the sample without associated iron oxide also indicates that Fe doping does not considerably affect the basic structure of TiO 2 , which is consistent with the results obtained by XRD. It was found that the Raman vibration amplitude decreases as the particle size decreases.…”

Section: Resultssupporting

confidence: 87%

“…The Raman spectrometer further ascertained the crystal structure of the catalyst and analyzed the change of the chemical form caused by different iron doping concentrations. As shown in Figure , Fe–TiO 2 samples could better correspond to the Raman vibration mode of the standard anatase-phase structure; peaks appear at 144 cm –1 (E g ), 197 cm –1 (E g ), 397 cm –1 (B 1g ), 515 cm –1 (A 1g + B 1g ), and 638 cm –1 (E g ) . The similar Raman pattern of the sample without associated iron oxide also indicates that Fe doping does not considerably affect the basic structure of TiO 2 , which is consistent with the results obtained by XRD.…”

Section: Resultssupporting

confidence: 87%

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Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Hu,

Yang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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In recent years, the development and application of semiconductor materials with excellent photocatalytic properties have been paid wide attention in addressing the issue of water pollution. Hollow nanospheres of titanium dioxide (TiO 2 ), doped with Fe ions, have been fabricated through the hard template method for photocatalytic degradation of organic pollutants. The hierarchical nanospheres were synthesized using hydrothermal carbon spheres as a template, resulting in an average diameter of about 200 nm, a mesoporous structure characterized by a remarkably large specific surface area, and uniform dispersion of Fe on the surface of hollow TiO 2 . In this study, the effect of operating parameters such as catalyst concentration and environmental conditions on the degradation of rhodamine dyes by catalysts was investigated. The optimal Fe dopant content of TiO 2 was 2.0%, exhibiting the highest photocatalytic activity and recyclability under ultraviolet (UV) light irradiation. It can be attributed to the double effects of the oxygen vacancy (OV) defect produced by doped ion modification and more active site of the hollow structure. The results show that Fe−TiO 2 composites can be used as effective photocatalysts to mineralize toxic dye molecules from wastewater.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 87%

Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Hu,

Yang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…5 Therefore, enhancing the machinability of SiC ceramics has become a very challenging task and needs to be solved urgently. Photocatalytic assisted polishing (PCAP) 6 derived from chemical mechanical polishing (CMP) 7 and combined with the photocatalytic reaction 8 has become an advanced polishing method to produce nondestructive supersmooth surfaces. 9 Although PCAP has the advantages of cost effectiveness along with low pollution risks and negligible surface damage effect 10 and can be used in the processing of many difficult-to-machine materials, 11 its poor polishing efficiency 12 and limited polishing conditions are still bottlenecks to be resolved.…”

Section: ■ Introductionmentioning

confidence: 99%

Investigation on Enhanced Machinability of SiC Ceramics through Photocatalytic Vibration Composite Polishing

Gu,

Xu,

Lin

et al. 2024

Langmuir

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The problems of low polishing efficiency and serious surface damage in the processing of silicon carbide (SiC) ceramics are well-known. In view of the above problems, a new method of photocatalytic vibration composite polishing (PVCP) combined with a compound control strategy was proposed. A vibration-assisted device was developed, and a compound control system was designed for the device to improve the trajectory tracking accuracy. Experiments were carried out to verify the effectiveness of the vibration-assisted device and the compound control system. In addition, methyl orange degradation and fading experiments, redox potential measurement experiments, and SiC ceramic surface hardness characterization experiments were carried out to reveal the effects of vibration and photocatalytic parameters on polishing solution oxidation and SiC ceramic surface mechanical properties. Finally, the effects of photocatalysis, vibration frequency, amplitude, and the compound control system on the polishing effect were analyzed. The results show that when the UV intensity is 100%, the polishing force is 3−4N, the vibration frequency is 400 Hz, the amplitude is 15 μm, and the surface roughness of SiC ceramics is reduced by about 11 nm after the introduction of the compound control system, which verifies the effectiveness of the combination of the compound control system and PVCP.

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“…The photocatalytic dye degradation was greatly accelerated by doping with rare earth metals such as Ce. [ 41 ] Ce (cerium) is a commonly used dopant in various materials attributed to distinct electronic properties and structure. Some advantages of using Ce as a dopant include improved optical properties, increased catalytic properties, and enhanced mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Farid¹,

Aman

Ahmad

et al. 2023

Energy Tech

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Wastewater treatment and management have been hot topics for the past three decades. Water reuse can help to alleviate the problems of water shortage and wastewater treatment in practice. Water can be used for household uses once the organic contaminants are removed. In this research, bare MoO3 and Ce‐doped MoO3 are fabricated using a straightforward hydrothermal method for wastewater treatment. The different analytical techniques are utilized to study the physiochemical features of all the synthesized products. Rhodamine B (RhB) is reduced photocatalytically under exposure of visible light to ascertain the possible capacity. The photocatalytic results suggest that the photoreduction of RhB with 2% Ce‐doped MoO3 exhibits a greater photocatalytic activity of 91.83% than the pure and other doped materials. The kinetic study of 2% Ce‐doped MoO3 displays the greater rate constant of 0.0163 min−1 and a lower Rct value of 0.95 Ω. The research indicates that the doping approach is a very effective way to decrease the bandgap and boost RhB's photocatalytic reduction. Other environmental and water‐related problems can be solved using Ce‐doped MoO3's improved physical and structural characteristics.

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Synthesis, characterization, and photocatalytic performance of methyl orange in aqueous TiO2 suspension under UV and solar light irradiation

Cited by 20 publications

References 41 publications

Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Investigation on Enhanced Machinability of SiC Ceramics through Photocatalytic Vibration Composite Polishing

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

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Synthesis, characterization, and photocatalytic performance of methyl orange in aqueous TiO2 suspension under UV and solar light irradiation

Cited by 20 publications

References 41 publications

Hollow Fe3+-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Hollow Fe3+-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Investigation on Enhanced Machinability of SiC Ceramics through Photocatalytic Vibration Composite Polishing

Ce‐Doped MoO3 Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

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Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Hollow Fe³⁺-Doped Anatase Titanium Dioxide Nanosphere for Photocatalytic Degradation of Organic Dyes

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater