Competitive coordination strategy for preparing TiO2/C nanocomposite with adsorption-photocatalytic synergistic effect

Meng, Yu-jie; Chen, Shan-shuai; Luo, Chao-bing; Song, Ying-jie; Xiong, Zi-wei; Li, Jun; Li, Deqiang

doi:10.1016/j.apsusc.2022.154395

Cited by 12 publications

(4 citation statements)

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“…TiO 2 /MWCNT composite and TiO 2 had nearly identical spectra. Fourier-transform infrared spectroscopy (FTIR) confirms the relationships and functions of various materials (Meng et al 2022 ). The stretching and bending vibrations of the surface-OH group cause the adsorption peaks at 3480 cm −1 and 1600 cm −1 (Shahnazi et al 2020 ).…”

Section: Resultsmentioning

confidence: 88%

“…The peak at 30.95° in the XRD pattern for o-MWCNTs corresponds to the plane (002) of graphite hexagonal structure, and the next peak at around 48.5° corresponds to the plane (1.00) of graphite hexagonal structure (Natarajan et al 2017 ; Caudillo-Flores et al 2016 ). The XRD pattern for TiO 2 nanoparticles showed several anatase phase peaks at 29.9°, 43.6.78°, 56.8°, 65.3°, and 74.7° (Meng et al 2022 ). The presence of the rutile in TiO 2 was also indicated by the peaks appearing at 42.6°, 52.04°, 64.42°, 78.21°, 89.51°, and 96.66° (Zhang et al 2019 ).…”

Section: Resultsmentioning

confidence: 99%

“…However, few studies have focused on how photocatalytic activity and adsorption work together. In addition, the design and use of effective TiO 2 /carbon material systems depend on a complete understanding of this interaction (Meng et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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Modeling adsorption and photocatalytic treatment of recalcitrant contaminant on multi-walled carbon/TiO2 nanocomposite

Pete

Kabuba

Otieno

et al. 2023

Environ Sci Pollut Res

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A nanocomposite photocatalyst consisting of titanium dioxide (TiO2) supported on multiwalled carbon nanotubes (MWCNTs) has been successfully prepared and used for the treatment of wastewater contaminated with tetracycline (TC), a recalcitrant antibiotic pollutant. The TiO2/MCNT composites were prepared by a simple evaporation-drying method. The properties of MWCNT/TiO2 were optimized by dispersing different amounts of TiO2 onto MWCNT. The structural and optical characteristics of the nano-engineered photocatalyst composite were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) techniques. Photocatalytic degradation of TC was conducted in a quartz glass reactor. Different kinetic models were used to demonstrate the governing mechanisms. The findings revealed that the TiO2/MWCNT composite had enhanced photocatalytic activity (95% TC removal) compared to TiO2 (86% removal). The photocatalyst nanocomposite exhibited overall pseudo-second-order reaction kinetics and favored the Langmuir adsorption isotherm. Although up to 95% degradation of TC was achieved, only 75% of it was mineralized as a result of the formation of stable refractory intermediates.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

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Modeling adsorption and photocatalytic treatment of recalcitrant contaminant on multi-walled carbon/TiO2 nanocomposite

Pete

Kabuba

Otieno

et al. 2023

Environ Sci Pollut Res

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“…Cyanide photodegradation occurs at the surface of the photocatalyst as a complex process involving transfer of multiple electrons and protons from the catalyst to cyanide species. Therefore, one of the key steps in photocatalytic degradation of cyanide is adsorption of cyanide ions on the surface of the photocatalyst [ 93 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Doping TiO2 NPs with Lanthanides (La, Ce and Eu) on the Adsorption and Photodegradation of Cyanide—A Comparative Study

Jaramillo-Fierro

León

2023

Nanomaterials

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Free cyanide is a highly dangerous compound for health and the environment, so treatment of cyanide-contaminated water is extremely important. In the present study, TiO2, La/TiO2, Ce/TiO2, and Eu/TiO2 nanoparticles were synthesized to assess their ability to remove free cyanide from aqueous solutions. Nanoparticles synthesized through the sol–gel method were characterized by X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier-transformed infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS), and specific surface area (SSA). Langmuir and Freundlich isotherm models were utilized to fit the adsorption equilibrium experimental data, and pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were used to fit the adsorption kinetics experimental data. Cyanide photodegradation and the effect of reactive oxygen species (ROS) on the photocatalytic process were investigated under simulated solar light. Finally, reuse of the nanoparticles in five consecutive treatment cycles was determined. The results showed that La/TiO2 has the highest percentage of cyanide removal (98%), followed by Ce/TiO2 (92%), Eu/TiO2 (90%), and TiO2 (88%). From these results, it is suggested that La, Ce, and Eu dopants can improve the properties of TiO2 as well as its ability to remove cyanide species from aqueous solutions.

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Interfacial solar vapor generation using sawdust hydrochar/titanium dioxide composite as photothermal conversion material

Karen,

Wang,

Chua

et al. 2024

J Aust Ceram Soc

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Competitive coordination strategy for preparing TiO2/C nanocomposite with adsorption-photocatalytic synergistic effect

Cited by 12 publications

References 50 publications

Modeling adsorption and photocatalytic treatment of recalcitrant contaminant on multi-walled carbon/TiO2 nanocomposite

Modeling adsorption and photocatalytic treatment of recalcitrant contaminant on multi-walled carbon/TiO2 nanocomposite

Effect of Doping TiO2 NPs with Lanthanides (La, Ce and Eu) on the Adsorption and Photodegradation of Cyanide—A Comparative Study

Interfacial solar vapor generation using sawdust hydrochar/titanium dioxide composite as photothermal conversion material

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