Enhanced visible-light photocatalytic activity of titanium dioxide doped CNT-C aerogel

Taleghani, M. Salehi; Tabrizi, Nooshin Salman; Sangpour, P.

doi:10.1016/j.cherd.2022.01.015

Cited by 12 publications

(9 citation statements)

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“…The characteristic peaks between 400 and 1000 cm −1 can be attributed to the bending vibration of the Ti–O–Ti and the stretching vibration of the Ti–O bonds [ 1 , 8 , 31 ]. These broad peaks in the mentioned range could also be attributed to a combination of Ti–O–Ti and Ti–O–C bond stretching vibrations [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The indirect bandgap energy (Eg) of the uncalcinated samples dried at a 400 mbar vacuum was determined to be equal to 3.32 ± 0.037 eV and for the calcinated samples it was 3.08 ± 0.026 eV. Moreover, the anatase bandgap can be changed by variations in the size of the nanoparticles or the synthesis conditions [11]. The investigated amorphous TiO 2 aerogels showed a higher indirect bandgap energy (E g = 3.31 ± 0.01 eV, Figure 11a) compared to the crystalline phase E g , which is equal to 3.08 ± 0.028 eV (Figure 11b) [48].…”

Section: Uv-vis Spectroscopy Analysismentioning

confidence: 99%

“…Titanium dioxide (TiO 2 ) is considered one of the most well-known photocatalysts due to its efficient photocatalytic activities [ 8 ], low cost, and safety for human health [ 9 ] and the environment [ 10 ]. Titania can also be used in other applications, such as photocatalytic water splitting, removal of pollutants from the environment [ 11 , 12 ], solar cells [ 13 ], rechargeable batteries [ 14 ], sensors, supercapacitors, and biomedical devices [ 13 , 15 ]. In particular, for solar cell applications, a mesoporous TiO 2 with a large specific surface area is essential to increase the amount of dye adsorption [ 16 , 17 ] or perovskite adsorption, as well as the power conversion efficiency [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of the Precursor’s Nature and Drying Conditions on the Structure, Morphology, and Thermal Properties of TiO2 Aerogels

Donėlienė¹,

Fataraitė‐Urbonienė

Danchova

et al. 2022

Gels

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A cost-effective solution for the synthesis of high-porosity TiO2 aerogels, which can be used as a mesoporous perovskite network charge-carrier material during the manufacture of solar cells, is described. The effects of the synthesis parameters (precursor (titanium (IV) isopropoxide (TIP) and tetrabutyl orthotitanate (TBOT)), additional solvent exchange (n-hexane (nH), cyclohexane (CH), and diethyl ether (DE)), subcritical drying (800 mbar vacuum, 70 °C, 8 h), aging, and calcination on the aerogel’s structure have been investigated. Methods of XRD, FT-IR, BET, Raman, STA, SEM, UV–vis, and thermal conductivity measurements were applied to find out the relation between the synthesis conditions and the properties of the synthesized aerogels. Amorphous aerogels are polydispersed systems with the highest probability of pore diameter from 0.5 to 15 nm. An nH-exchanged, aged aerogel synthesized from the precursor TIP shows the highest diameter of pores. After calcination, the aerogels tend to crystallize into an anatase phase and the size of the crystallites depends on the precursor’s nature. Calcination leads to a significant increase in both the apparent and true density of the aerogels, and it also results in an increase in porosity and thermal conductivity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Uv-vis Spectroscopy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Influence of the Precursor’s Nature and Drying Conditions on the Structure, Morphology, and Thermal Properties of TiO2 Aerogels

Donėlienė¹,

Fataraitė‐Urbonienė

Danchova

et al. 2022

Gels

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“…These outcomes highlight the superior capabilities of DBHP for both mineralization and degradation of CPS, surpassing those of Dy2NdSbO7, Bi2WO6, and N-dT. The saturation fluctuation graphs of CPS and TOC during three consecutive degradation cycles using DBHP, Dy2NdSbO7, Bi2WO6, or N-dT as the photocatalytic sample under visible light conditions are shown in Figures S1 and S2, respectively [105].…”

Section: X-ray Photoelectron Spectroscopy Analysismentioning

confidence: 89%

Synthesis, Characterization of Dy2NdSbO7/Bi2WO6 Heterojunction Photocatalyst and the Application for the Photocatalytic Degradation of Chlorpyrifos under Visible Light Irradiation

Luan,

Hao,

Yao

et al. 2023

Crystals

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A groundbreaking photocatalytic nanomaterial, Dy2NdSbO7, was fabricated smoothly using the hydrothermal synthesis technique for the first time. Apart from that, Dy2NdSbO7/Bi2WO6 heterojunction photocatalyst (DBHP) was initially fabricated using the solvothermal fabrication technique. X-ray diffractometer, Fourier-transform infrared spectrometer, Raman spectrometer, UV-visible spectrophotometer, X-ray photoelectron spectrometer, inductively coupled plasma optical emission spectrometer, transmission electron microscope, and X-ray energy dispersive spectroscopy have been applied to evaluate and investigate the thetastructure, morphology, and physicochemical properties of synthesized samples. The results confirmed that the pyrochlore-type crystal structures of Dy2NdSbO7 belonged to the Fd3m space group with the cubic crystal system and the β-pyrochlore-type crystal structures of Bi2WO6 which belonged to the Pca21 space group with orthorhombic crystal system. Under visible light exposure for 155 min (VLP-155min) using DBHP in the capacity of the photocatalytic nanomaterial, the removal efficiency of chlorpyrifos (CPS) saturation reached 100%. Comparison of CPS removal efficiency after VLP-155min revealed that DBHP exhibited higher removal efficiency than Dy2NdSbO7, Bi2WO6, or N-doped TiO2 photocatalyst, with removal efficiency 1.15 times, 1.23 times, or 2.55 times higher, respectively. Furthermore, the oxidizing capability of free radicals was investigated using trapping agents. Results demonstrated that superoxide anions exhibited the strongest oxidative capability, followed by hydroxyl radicals and holes. The results presented in this study lay a robust groundwork for future investigations and advancements in the field of highly efficient heterostructure material. These findings have significant implications for the development of environmental remediation strategies and provide valuable insights into sustainable solutions for addressing CPS contamination.

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Shining Light on Carbon Aerogel Photocatalysts: Unlocking the Potentials in the Quest for Revolutionizing Solar‐to‐Chemical Conversion and Environmental Remediation

Wong,

Foo,

Siang

et al. 2023

Adv Funct Materials

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The past few years have witnessed a surge of interest in the development of carbon aerogel‐based photocatalysts, stemming from their fascinating characteristics that encompass the inherent properties of 2D carbon‐based nanomaterials and unique 3D structural features. Benefitting from their auspicious physicochemical characteristics, including low density, abundant active sites, and remarkable electrical conductivity, carbon aerogels have emerged as promising candidates for photocatalysis in energy and environmental applications. Thus, this review presents a panorama of state‐of‐the‐art advancements underlying the synthesis and modifications of carbon aerogel‐based nanocomposites for enhanced performance in photocatalytic applications. The synthetic strategies followed by the unique roles of carbon aerogel are highlighted to decipher the auspicious roles of carbon aerogels in bolstering photocatalytic activity. Additionally, the fundamental mechanism behind carbon aerogel‐based photocatalysts as well as their modifications are thoroughly discussed. Thereafter, the works on the photocatalytic applications of carbon aerogel in solar‐driven hydrogen evolution, CO2 reduction, pollutant decontamination, and bacteria inactivation, in the past 5 years are summarized with insights into charge dynamics being unveiled. Lastly, this review will prospect the ongoing challenges and future outlook of carbon aerogel‐based heterostructures in photocatalysis, aiming to facilitate the development of carbon aerogel‐based photocatalysts at the forefront of this research.

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Enhanced visible-light photocatalytic activity of titanium dioxide doped CNT-C aerogel

Cited by 12 publications

References 84 publications

The Influence of the Precursor’s Nature and Drying Conditions on the Structure, Morphology, and Thermal Properties of TiO2 Aerogels

The Influence of the Precursor’s Nature and Drying Conditions on the Structure, Morphology, and Thermal Properties of TiO2 Aerogels

Synthesis, Characterization of Dy2NdSbO7/Bi2WO6 Heterojunction Photocatalyst and the Application for the Photocatalytic Degradation of Chlorpyrifos under Visible Light Irradiation

Shining Light on Carbon Aerogel Photocatalysts: Unlocking the Potentials in the Quest for Revolutionizing Solar‐to‐Chemical Conversion and Environmental Remediation

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