Solar light-driven photocatalytic degradation of phenol on S-doped nanoporous carbons: The role of functional groups in governing activity and selectivity

Bandosz, Teresa J.; Policicchio, Alfonso; Florent, Marc; Li, Wanlu; Poon, Po S.; Matos, Juan

doi:10.1016/j.carbon.2019.09.037

Cited by 54 publications

(27 citation statements)

References 58 publications

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“…The amorphous carbon is a photochemically active material showing a BB41 conversion of 25% after 6 h irradiation. This level of conversion was expected since some functional groups presented in the surface of the amorphous carbon are photoactive as shown by our group [25,28,[64][65][66], and by other groups [67][68][69][70][71]. In the present case, the photoactivity in the amorphous carbon can be ascribed to the polyester groups observed in the Figure 2 and summarized in Table 1.…”

Section: Photocatalytic Testssupporting

confidence: 73%

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

et al. 2019

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Innovative composites based on an amorphous-carbon matrix containing a second phase ZnO oxide and/or highly dispersed Zn metallic were synthesized via a modified Pechini route, in which a partial pyrolysis method was reached. Studies of adsorption in the dark and the photocatalytic activity for the cationic azo-dye, basic blue 41, and degradation were carried out. X-ray diffraction patterns for the carbon matrix and its composite with Zn show characteristics of the amorphous carbon. The infrared in the mid region of the composite prepared with ZnO and Zn exhibit vibrational bands related to bonds zinc oxide. The surface pH of the material is the main factor responsible for the adsorption of the azo-dye, but the contribution of mesopores favored the diffusion of molecules from the bulk of solution to the pore framework. Esters-like functional groups on the surface of carbons hinder the adsorption of the azo-dye. When Zn is embedded within amorphous carbon the photocatalytic activity of the composites showed up to 2.4 higher than neat ZnO. The enhancement in the photocatalytic activity and stability of C/ZnO/Zn and C/Zn composites is discussed in terms of a protector effect by the carbon layers inserted in composites. Carbon layers are responsible to inhibit the lixiviation of ZnO particles along irradiation.

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Section: Photocatalytic Testssupporting

confidence: 73%

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

et al. 2019

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“…It has been found that heteroatom-containing groups on the surface of nanoporous carbons, mainly O-containing groups, are responsible for the formation of reactive oxygen species (ROS) such as hydroxyl radical ( • OH) and superoxo anion radical (O 2 • ¯) [14,16,17]. By contrast, only limited works have reported the role of reactive sulfur species (RSS) in the photocatalytic activity of nanoporous carbons [15,24,25,26,27]. Several works have reported interesting features concerning to the interfacial chemistry and porosity characteristics in carbon/TiO 2 composites [20,21,22,26,27,28,29,30,31,32,33,34].…”

Section: Introductionmentioning

confidence: 99%

“…By contrast, only limited works have reported the role of reactive sulfur species (RSS) in the photocatalytic activity of nanoporous carbons [15,24,25,26,27]. Several works have reported interesting features concerning to the interfacial chemistry and porosity characteristics in carbon/TiO 2 composites [20,21,22,26,27,28,29,30,31,32,33,34]. These include O-, N-, P- and S-containing nanoporous carbons-TiO 2 composites which have exhibited an enhancement in the photocatalytic degradation under solar irradiation of different types of organic molecules such as methylene blue [12,29,32], imidacloprid [13], 2,4-dichloroacetic acid [13], 4-chlorophenol [28], bisphenol [33], and phenol [13,26,27,30].…”

Section: Introductionmentioning

confidence: 99%

“…10–20% mesopores to the total pore volume is required for the efficient mass diffusion of pollutant molecules from the bulk solution [12,13,31,33]. Moreover, the formation of interfacial Ti-heteroatoms structures can modulate the photoactivity of TiO 2 [20,21,22,26,27,28,34]. Gomis-Berenguer and co-workers [26] have shown that the photochemical conversion of aromatic molecules such as phenol inside the pore framework of nanoporous carbons is very sensitive to the nature of the S-containing groups.…”

Section: Introductionmentioning

confidence: 99%

“…These authors showed that the photochemical reactivity can be enhanced by tailoring the pore size distribution and the types of O- and S-containing surface groups. In a very recent work [27], our group has also reported that specific S-C groups on porous carbon surfaces enhanced the photoactivity and governed the selectivity of products.…”

Section: Introductionmentioning

confidence: 99%

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TiO2/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features

et al. 2019

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Hybrids containing approximately equal amounts of P25 TiO2 and S-doped porous carbons were prepared using a water-based slurry mixing method. The materials were extensively characterized by adsorption of nitrogen, potentiometric titration, thermal analysis in air and in helium, XRD, XPS and SEM. The collected results showed the significant blockage of carbon micropores by TiO2 particles deposited on their outer surface. The formation of a new interface, especially for the S-rich samples, might also contribute to the porosity alteration. Analysis of surface chemistry suggested the presence of Ti-S bonds with an involvement of sulfur from thiophenic species in the carbon phase. The latter, especially when polymer-derived, was mainly deposited on the TiO2 nanoparticles. Formation of Ti-S stabilized sulfur and increased the ignition temperature of the hybrids, especially those with a high content of sulfur, in comparison with the ignition temperature of carbons. The surfaces of hybrid with S-containing carbons was also thermally very stable and of basic chemical nature. The formation of interfacial structures Ti-C was detected by XPS analysis suggesting a partial reduction of the Ti.

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Heterogeneous Catalytic Oxidation for the Degradation of Aniline in Aqueous Solution by Persulfate Activated with CuFe₂O₄/Activated Carbon Catalyst

Chen

Liang

2022

ChemistrySelect

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This work investigated the degradation of aniline in aqueous solution by PMS activated with CuFe 2 O 4 /activated carbon heterogeneous catalyst. Firstly, catalyst which was successfully synthesized by impregnation and calcination process was fully characterized. Next, influences of factors in degradation on this system were explored. Under optimum process conditions, system could achieve TOC removal rate of 87 % in 2 hours. Then the stability of the catalyst was proved. In addition, the synergistic effect between CuFe 2 O 4 and activated carbon was proposed in PMS activation at both low and high concentrations. Furthermore, it was observed that CuFe 2 O 4 /activated carbon could also activate PMS at low concentration. Finally, SO �À 4 was suggested as the main activated species in this system by characterization and analysis. It is concluded that CuFe 2 O 4 /activated carbon catalyst could be used as an effective catalyst to activate PMS for the degradation of aniline.

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Solar light-driven photocatalytic degradation of phenol on S-doped nanoporous carbons: The role of functional groups in governing activity and selectivity

Cited by 54 publications

References 58 publications

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

TiO2/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features

Heterogeneous Catalytic Oxidation for the Degradation of Aniline in Aqueous Solution by Persulfate Activated with CuFe₂O₄/Activated Carbon Catalyst

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Solar light-driven photocatalytic degradation of phenol on S-doped nanoporous carbons: The role of functional groups in governing activity and selectivity

Cited by 54 publications

References 58 publications

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

TiO2/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features

Heterogeneous Catalytic Oxidation for the Degradation of Aniline in Aqueous Solution by Persulfate Activated with CuFe2O4/Activated Carbon Catalyst

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Product

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Heterogeneous Catalytic Oxidation for the Degradation of Aniline in Aqueous Solution by Persulfate Activated with CuFe₂O₄/Activated Carbon Catalyst