Preparation of Ce-TiO 2 /carbon aerogel electrode and its performance in degradation of 4-chlorophenol

Wang, Yabo; Zi-hong, Pan; Qin, Dezhi; Bai, Su-Zhen; Peng, Qin-Long

doi:10.1016/j.jre.2017.10.006

Cited by 14 publications

(8 citation statements)

References 32 publications

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“…Crystalline anatase TiO2 has a density of 3.9 g/cm 3 [32]. When a high density oxide is deposited on a light weight material, and there is no significant change in the morphology, the average density increases, leading to a decrease in the specific surface area [39][40][41].…”

Section: Resultsmentioning

confidence: 99%

“…In (Figure 3a). As the result of the pyrolysis the RFCA has more defined D and G peaks (Figure 3b) [39][40][41]. In the composites, the crystalline TiO2 has characteristic Raman peaks, among them the 141 cm -1 is the most significant [42].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4a shows that the RFA alone degrades the MO dye slightly under UV light [46]. This photocatalytic effect becomes more significant after growing TiO2 on the RFA substrate [39,40,47]. Due to the relatively similar surface area the results can be directly compared.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Justh

Mikula

Bakoš

et al. 2019

Carbon

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Monolithic structured TiO2/aerogel composites were prepared from resorcinol-formaldehyde polymer aerogel (RFA) and its carbon aerogel (RFCA) derivative. A resorcinol-formaldehyde hydrogel was synthesized in a sol-gel reaction and transformed into polymer aerogel by supercritical drying. The RFA was converted to carbon aerogel by pyrolysis at 900 °C in dry N2.Amorphous and crystalline TiO2 layers were grown from TiCl4 and H2O precursors by atomic layer deposition (ALD) at 80 °C and 250 °C, respectively, on both RFA and RFCA. The substrates and the composites were studied by N2 adsorption, TG/DTA-MS, Raman, SEM-EDX and TEM techniques. Their photocatalytic activity was compared in the UV catalyzed decomposition reaction of methyl orange dye. Keywordsresorcinol-formaldehyde polymer aerogel, carbon aerogel, photocatalysis, ALD, TiO2 IntroductionBeside crystalline carbonaceous nanomaterials such as fullerene, graphene, graphene oxide, nanodiamond, carbon nanospheres, carbon nanotubes; mesoporous carbon aerogels have attracted a great deal of attention. Carbon aerogels, available also in monolithic form, have several favorable properties, for example they can be used as adsorbents or as substrates for catalysts, because of their robustness and high specific surface area [1,2]. They are also excellent thermal and phonic insulators, while conduct electricity. These properties can be tuned through their synthesis conditions. [3][4][5][6][7] Resorcinol-formaldehyde (RF) organic aerogels, that Pekala and co-workers synthetized for the first time [8], undergo two main stages during preparation. In the first stage a hydrogel is prepared by a sol-gel process and in the second stage after drying the aerogel is obtained. The resorcinol-formaldehyde polymer aerogel becomes a carbon aerogel in a consecutive third stage, which is carbonization occasionally followed by activation. Depending on the conditions carbonization or activation influence the structural and performance characteristics, like the specific surface area, significantly [9][10][11][12].Photocatalytic carbon nanocomposites have great potential in the field of environmental remediation, water splitting and self-cleaning surfaces [13,14]. Among the various semiconductor oxide photocatalysts TiO2 is researched widely, due to being stable and nontoxic. TiO2 has ideal band gap width for the half reactions of water splitting and its composites with other nanomaterials, such as carbon nanostructures, may enhance the photocatalytic activity. However, its use still faces some difficulties, such as a narrow light response range limited to UV. The carbon nanostructure inhibits the recombination by promoting the charge separation as an electron acceptor. This effect and the widening of the wavelength response range through Ti-O-C bonds as well as modifying the photocatalytic selectivity are three advantages of TiO2 composites [3,[15][16][17][18]. Moreover, a number of studies indicates that nanoporous or nanostructured carbon materials, such as activated carbon or graphene-oxide...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Justh

Mikula

Bakoš

et al. 2019

Carbon

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“…Wu et al found that CA particle electrodes were efficient for discoloration of RBRX dye(C 19 H 10 O 7 N 6 C l2 S 2 Na 2 ) . Wang et al prepared a Ce‐TiO 2 /CA electrode for degradation of 4‐chlorophenol . Wang et al used their CA electrode to catalyze the degradation of high concentration p ‐nitroaniline under visible light .…”

Section: Introductionmentioning

confidence: 99%

“…31 Wang et al prepared a Ce-TiO 2 /CA electrode for degradation of 4-chlorophenol. 32 Wang et al used their CA electrode to catalyze the degradation of high concentration p-nitroaniline under visible light. 33 Zhao et al proposed a SnO 2 -Sb/CA electrode, which they used to oxidize perfluorooctanoate.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and environmental application of the composite electrode TiO₂‐NTs/SnO₂—Sb with carbon aerogels

Liu

Chen

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Research on electrode materials with high electrochemical activity is of great importance for the electrochemical oxidation technique. In this work, an electrode comprising titanium dioxide nanotubes with tin oxide antimony (TiO2‐NTs/SnO2—Sb) with carbon aerogels (TSS‐CAs) was fabricated and used to degrade three isomers of dihydroxybenzenes. RESULTS It was observed that the TSS‐0.5%CAs electrode prepared with 0.5 wt% CAs possessed prominent pore structure and a larger specific surface area of 180.83 m2 g−1. Electrochemical measurements revealed that the TSS‐0.5%CAs electrode had enhanced electrochemical activity, larger electroactive area, and higher oxygen evolution potential. Relevant operational parameters including initial contaminant concentration, pH, electrolyte concentration and current density had significant effects on the electrocatalytic performance of the TSS‐CAs electrode. CONCLUSION It was demonstrated that a proper content of carbon aerogel could improve the structure and electrochemical performance of the TSS‐CAs electrode. The removal of catechol was higher than that of hydroquinone and resorcinol during electrochemical oxidation, due to its lower Gibbs free energy barriers. Oxidation of intermediates of dihydroxybenzenes by the TSS‐CAs electrode also was confirmed. © 2019 Society of Chemical Industry

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Electrodes based on zeolites modified with cobalt and/or molybdenum for pesticide degradation: part II—2,4,6-trichlorophenol degradation

Castro

Fernández

Olivares

et al. 2020

J Solid State Electrochem

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Preparation of Ce-TiO 2 /carbon aerogel electrode and its performance in degradation of 4-chlorophenol

Cited by 14 publications

References 32 publications

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Preparation, characterization and environmental application of the composite electrode TiO₂‐NTs/SnO₂—Sb with carbon aerogels

Electrodes based on zeolites modified with cobalt and/or molybdenum for pesticide degradation: part II—2,4,6-trichlorophenol degradation

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Preparation of Ce-TiO 2 /carbon aerogel electrode and its performance in degradation of 4-chlorophenol

Cited by 14 publications

References 32 publications

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Preparation, characterization and environmental application of the composite electrode TiO2‐NTs/SnO2—Sb with carbon aerogels

Electrodes based on zeolites modified with cobalt and/or molybdenum for pesticide degradation: part II—2,4,6-trichlorophenol degradation

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Preparation, characterization and environmental application of the composite electrode TiO₂‐NTs/SnO₂—Sb with carbon aerogels