TiO2 quantum dots loaded sulfonated graphene aerogel for effective adsorption-photocatalysis of PFOA

Zhu, Chao; Xu, Jinli; Li, Lingxiangyu; Wang, Jun; Li, Yungui; Liu, Renlan; Shen, Yi

doi:10.1016/j.scitotenv.2019.134275

Cited by 50 publications

(16 citation statements)

References 55 publications

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“…TiO 2 -MWCNT and TiO 2 -rGO were able to degradẽ 100% of PFOA under UV irradiation in 8 h and 12 h, respectively. Recently, Shen et al [64] fabricated TiO 2 quantum dots of 2-5 nm in size on sulfonated graphene nanosheets using sodium dodecyl sulfate as a surfactant (Figure 2a). Due to the hydrophobic nature of sulfonate graphene and highly dispersed TiO 2 quantum dots, PFOA pollutants could instantaneously be adsorbed on the surface, followed by fast decomposition by eliminating CF 2 species.…”

Section: Metal Oxidesmentioning

confidence: 99%

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Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

et al. 2021

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PFAS substances, which have been under investigation in recent years, are certainly some of the most critical emerging contaminants. Their presence in drinking water, correlated with diseases, is consistently being confirmed by scientific studies in the academic and health sectors. With the aim of developing new technologies to mitigate the water contamination problem, research activity based on advanced oxidation processes for PFAS dealkylation and subsequent mineralization is active. While UV radiation could be directly employed for decontamination, there are nevertheless considerable problems regarding its use, even from a large-scale perspective. In contrast, the use of cheap, robust, and green photocatalytic materials active under near UV-visible radiation shows interesting prospects. In this paper we take stock of the health problems related to PFAS, and then provide an update on strategies based on the use of photocatalysts and the latest findings regarding reaction mechanisms. Finally, we detail some brief considerations in relation to the economic aspects of possible solutions.

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Section: Metal Oxidesmentioning

confidence: 99%

“…Figure 2. PFOA degradation using (a) TiO 2 quantum dots supported on sulfonated graphene nanosheets (reprinted from[64], copyright (2020) with permission from Elsevier) and (b) single Pt atoms loaded on the reductive sites of the TiO 2 facet (reprinted from[67], copyright (2021) with permission from ACS Publications).…”

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confidence: 99%

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

et al. 2021

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“…Recently, those materials gained high interest in applications such as in catalyzed syntheses 1 , 2 as well as in electrocatalytic 3 − 5 and photocatalytic reactions. 6 , 7 Furthermore, a variety of sensing applications were reported. 8 − 10 Owing to the good accessibility of the surface, thin films or coatings from these materials experience an increasing interest.…”

Section: Introductionmentioning

confidence: 99%

“…Because of their unique physical properties such as high specific surface areas and open-pore structures, aerogels are highly investigated. Recently, those materials gained high interest in applications such as in catalyzed syntheses , as well as in electrocatalytic − and photocatalytic reactions. , Furthermore, a variety of sensing applications were reported. − Owing to the good accessibility of the surface, thin films or coatings from these materials experience an increasing interest. − In most cases, the aerogel coating is prepared by dropcasting and drying a slurry consisting of an aerogel material, solvents, and a binding substance like Nafion. − Because of mixing the slurry, however, the monolithic network is broken into smaller segments. In the resulting coating, these parts are later covered and connected using the binder.…”

Section: Introductionmentioning

confidence: 99%

Structural Diversity in Cryoaerogel Synthesis

et al. 2021

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Different techniques that enable the selective microstructure design of aerogels without the use of additives are presented. For this, aerogels were prepared from platinum nanoparticle solutions using the cryoaerogelation method, and respective impacts of different freezing times, freezing media, and freezing temperatures were investigated with electron microscopy as well as inductively coupled plasma optical emission spectroscopy. The use of lower freezing temperatures, freezing media with higher heat conductivities, and longer freezing periods led to extremely different network structures with enhanced stability. In detail, materials were created in the shape of lamellar, cellular, and dendritic networks. So far, without changing the building blocks, it was not possible to create the selective morphologies of resulting aerogels in cryoaerogelation. Now, these additive-free approaches enable targeted structuring and will open up new opportunities in the future cryoaerogel design.

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“…Composites of GAs can be prepared by which the desired properties of guest molecules along with GAs can be combined in a single physical entity. Various nanoarchitectures and polymers were generated in situ within GAs such as CoFe 2 O 4 nanoclusters [ 46 ], TiO 2 [ 47 ], and Co [ 48 ] nanocrystals, gold nanoparticles [ 49 ], Fe 3 O 4 nanoparticles [ 50 ], and quantum dots [ 51 ], along with some polymers such as polydimethylsiloxane [ 52 ], poly(aniline), poly(pyrrole) [ 34 , 53 ], and so on.…”

Section: Introductionmentioning

confidence: 99%

Graphene Aerogels for In Situ Synthesis of Conductive Poly(para-phenylenediamine) Polymers, and Their Sensor Application

2020

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In this study, macroporous graphene aerogels (GAs) were synthesized by chemical reduction of graphene oxide sheets and were used as a support material for in situ synthesis of conductive poly(para-phenylenediamine) (p(p-PDA)). The in situ synthesis of p(p-PDA) in GA was carried out by using a simple oxidation polymerization technique. Moreover, the prepared conductive p(p-PDA) polymers in the networks of GAs were doped with various types of acids such as hydrochloric acid (HCl), nitric acid (HNO3), sulfuric acid (H2SO4), phosphoric acid (H3PO4), respectively. The prepared GA and different acid-doped forms as GA/p(p-PDA) composites were characterized by FT-IR, TGA, and conductivity measurements. The observed FT-IR peaks at 1574 cm−1, and 1491 cm−1, for stretching deformations of quinone and benzene, respectively, confirmed the in situ synthesis of P(p-PDA) polymers within GAs. The conductivity of GAs with 2.17 × 10−4 ± 3.15 × 10−5 S·cm−1 has experienced an approximately 250-fold increase to 5.16 × 10−2 ± 2.72 × 10−3 S·cm−1 after in situ synthesis of p(p-PDA) polymers and with HCl doping. Conductivity values for different types of acid-doped GA/p(p-PDA) composites were compared with the bare p(p-PDA) and their undoped forms. Moreover, the changes in the conductivity of GA and GA/p(p-PDA) composites upon CO2 gas exposure were compared and their sensory potential in terms of response and sensitivity, along with reusability in CO2 detection, were evaluated.

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TiO2 quantum dots loaded sulfonated graphene aerogel for effective adsorption-photocatalysis of PFOA

Cited by 50 publications

References 55 publications

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

Structural Diversity in Cryoaerogel Synthesis

Graphene Aerogels for In Situ Synthesis of Conductive Poly(para-phenylenediamine) Polymers, and Their Sensor Application

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