Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Bi, Yuxi; Sun, Encheng; Zhang, Shuai; Du, Feiran; Wei, Haidi; Liu, Fang; Zhao, Chaocheng

doi:10.1007/s11356-021-14539-5

Cited by 15 publications

(7 citation statements)

References 48 publications

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“…However, although the increase of relative humidity will reduce the adsorption effect of ACF, it can greatly increase the photocatalysis and further improve the purification effect of the material. The purification ability of the material is affected by both adsorption and photocatalysis according to the results reported by Bi et al [48].…”

Section: The Effect Of Relative Humiditymentioning

confidence: 81%

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

2022

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Formaldehyde has a significant impact on human health. This study used a simple dipping method to load graphene-titanium dioxide (GR-TiO2) on activated carbon fibers (ACFs). The microstructure of GR-TiO2/ACF hybrid material was observed by SEM, combined with XRD and BET analysis. The result showed that the GR-TiO2/ACF hybrid material had a specific surface area of 893.08 m2/g and average pore size of 2.35 nm. The formaldehyde degradation efficiency of the prepared material was tested under different conditions, such as ultraviolet (UV) radiation, air supply volume, relative humidity, initial mass concentration. The results showed that the UV radiation intensity, airflow and the initial mass concentration were positively correlated with the formaldehyde removal rate, and the relative humidity was negatively correlated with the formaldehyde removal rate. The GR-TiO2/ACF hybrid material had a maximum formaldehyde removal rate of 85.54% within 120 min.

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Section: The Effect Of Relative Humiditymentioning

confidence: 81%

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

2022

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“…represents the amount of adsorption read from the device. Equation 1 was used to calculate the dye removal efficiency at any given time, where C 0 is the initial dye concentration, and C t is the dye concentration at time t [32,33].…”

Section: Fig 1 Schematic Representation Of Pilotmentioning

confidence: 99%

“…participate in photo-oxidation reactions and result in AO7 degradation to intermediate products, H 2 O and CO 2 . It should be mentioned that using RHB in the photocatalytic system prevents electron-hole recombination and reduces efficiency since RHB acts as an electron receptor [32,64].…”

Section: Possible Photocatalytic Mechanism In the Degradation Of Ao7mentioning

confidence: 99%

Using a promising biomass-based biochar in photocatalytic degradation: highly impressive performance of RHB/SnO2/Fe3O4 for elimination of AO7

Sadati

Ayati

2023

Photochem Photobiol Sci

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The release of industrial dyes into the environment has recently increased, resulting in harmful effects on people and ecosystems. In recent years, the use of adsorbents in photocatalytic nanocomposites has attracted significant interest due to their low cost, efficiency, and eco-friendly physical and chemical characteristics. Herein, Acid Orange 7 (AO7) removal was investigated by photocatalytic degradation using Rice Rusk Biochar (RHB), Tin (IV) Oxide (SnO 2 ), and Iron Oxide (Fe 3 O 4 ) as heterogeneous nanocomposite. After the preparation of RHB, the nanocomposite was synthesized and characterized using Field Emission Scanning Electron Microscope (FESEM), X-ray Powder Diffraction (XRD), Brunauer-Emmett-Teller (BET), and Fourier-Transform Infrared Spectroscopy (FT-IR). To optimize the elimination of AO7 by the One-Factor-At-a-Time (OFAT) method, effective parameters including mixing ratio (RHB:SnO 2 :Fe 3 O 4 ), dye concentration, solution pH, and nanocomposite dose were studied. The results showed that the removal efficiency of AO7 after 120 min under the optimal mixing ratio of 1:1.5:0.6, dye concentration of 75 mg/l, solution pH of 4, and nanocomposite dose of 0.7 g/l was 92.37%. Moreover, Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) removal rates were obtained at 82.22 and 72.22%, respectively. The Average Oxidation State (AOS) and Carbon Oxidation State (COS) of the AO7 solution were increased after the process, indicating biodegradability improvement. Various scavenger effects were studied under optimal conditions, and the results revealed that O 2 − and H + reactive species play a crucial role in the photocatalytic degradation of AO7. The reusability and stability of nanocomposite were tested in several consecutive experiments, and the degradation efficiency was reduced from 92 to 79% after five consecutive cycles. It is expected that this research contributes significantly to the utilization of agricultural waste in photocatalytic nanocomposites for the degradation of environmental pollutants.

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“…So, when the pollutant concentration and the gas flow rate were subjected to change, the breakthrough time and level also varied significantly. A powerful adsorption capacity of substrate would be beneficial to catalytic oxidation of VOCs because it concentrates the pollutant molecules on the surface and near active sites of catalyst and provides the conditions for a well light and active species exposure [9,15]. The results showed that Mo:TiO 2 /GAC could be a suitable alternative for the bare GAC because it changed the breakthrough time and the reactor outlet concentration even in darkness and without light irradiation with a non-significant difference (figure 8).…”

Section: Photocatalytic Performancementioning

confidence: 99%

“…Morphological modifications have been considered as a good solution, among which coating TiO 2 on a porous substrate has been most commonly employed to increase both the specific surface area and its affinity towards VOC compounds [12,13]. Adsorbent materials such as silica, zeolites, and activated carbon (AC), have played an important role as substrates, among them, AC is considered to be a phenomenal supports [14][15][16]. Thus, AC has been used as a desirable substrate because of the favorable properties of AC such as porous molecular structure, high affinity towards VOC molecules, large surface area, availability in various forms and sizes, and low cost [14].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Abedi

Shahmoradi

Mohammadi

et al. 2022

Mater. Res. Express

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Modification of TiO2 is one of the techniques used to enhance its photodegradation efficiency and to make it visible-light-active. In this study, Mo-doped TiO2 nanoparticles were synthesized using a fast sol-gel technique, and then coated on granular activated carbon (GAC) as both substrate and adsorbent to obtain Mo:TiO2/GAC composite. The fabricated composite was characterized using powder XRD, SEM, EDAX, FTIR, and BET analysis. Then the composite was applied to photodegrade volatile organic compounds (VOCs) under both UV and visible light irradiation. The characterization results showed high crystallinity and purity. Mo:TiO2/GAC composite had higher photodegradation efficiency compared with bare TiO2 and bare GAC. Moreover, studying operational parameters showed that the optimum condition for photodegradation efficiency of VOCs was at flowrate of 1 l/min, VOCs concentration of 20 ppm, and light intensity of 400 and 600 W/m2 for UV and visible light respectively. The results suggest that Mo:TiO2/GAC is a visible-light-active composite and can be acceptably used to decompose VOCs under visible light with adequate efficiency and without the generation of harmful by-products such as O3 as compared with UV.

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Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Cited by 15 publications

References 48 publications

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

Using a promising biomass-based biochar in photocatalytic degradation: highly impressive performance of RHB/SnO2/Fe3O4 for elimination of AO7

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

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Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Cited by 15 publications

References 48 publications

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

A Simple Preparation Method of Graphene and TiO2 Loaded Activated Carbon Fiber and Its Application for Indoor Formaldehyde Degradation

Using a promising biomass-based biochar in photocatalytic degradation: highly impressive performance of RHB/SnO2/Fe3O4 for elimination of AO7

Photocatalytic degradation of VOCs from air stream using Mo:TiO2/GAC nanocomposites

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Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites