Superhydrophobic self-floating TiO2-silicone composite aerogels and their air–liquid-solid triphase photocatalytic system

Zhang, Lixin; Rao, Lei; Wang, Peifang; Shi, Zhenyu; Wang, Pingfan

doi:10.1016/j.apsusc.2020.147726

Cited by 32 publications

(13 citation statements)

References 60 publications

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“…In Figure 1A, compared with the nano-TiO 2 curve, four new peaks were observed around 1700, 1456, 1170, and 970 cm −1 on TKB and TK curves, which were respectively corresponded to the C=O, C=C, C-O, and Ti-O-Si groups. [25] Additionally, a new peak around 1250 cm −1 noted on the TKB curve in Figure 1B was assigned to the CH group and this peak was absent on the TK curve. Meanwhile, the stretching vibration peaks of CH 2 and CH 3 groups on the TKB curve were stronger than that on the TK curve due to the surface coating of PBA which highly contributed to the increase in CH 3 intensity.…”

Section: Ftir Spectrum Analysismentioning

confidence: 94%

Sustainable Bio‐Based Wood Adhesive Incorporated Different Functionalized Nanoparticles: A Performance Comparison Study

Chen

Din

et al. 2021

Starch Stärke

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Nanoparticle incorporation is a common strategy for promoting the performance of starch‐based wood adhesive as low storage stability limits the application of conventional nanocomposite adhesives. This work focuses on the performance comparison of adhesives containing different nanoparticles (nano‐TiO2, TK (TiO2‐KH570), TKB (TiO2‐KH570‐Butyl acrylate)) to improve both the bonding strength and storage stability. The structure and morphology of these nanoparticles are characterized by Fourier transform infrared spectroscopy and transmission electron microscopy. The results indicate that the surface modification improves the dispersion of nano‐TiO2. After adding in adhesive, the results of shear strength, viscosity, and rheological properties signify that the structural strength within adhesive is related to the surface hydrophobicity and the thickness of the surface hydrophobic layer of functionalized nanoparticles. TKB exhibits excellent improvement on the storage stability of adhesive due to its wide surface hydrophobic layer weakening the intermolecular interaction. TK shows limited improvement on both bonding strength and storage stability as the hanging hydrogen groups from KH570 form cross‐linking structure with other components in adhesive. Therefore, selecting the appropriate functional nanoparticles is an important parameter for designing high‐performance wood adhesive for the veneer industry.

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Section: Ftir Spectrum Analysismentioning

confidence: 94%

Sustainable Bio‐Based Wood Adhesive Incorporated Different Functionalized Nanoparticles: A Performance Comparison Study

Chen

Din

et al. 2021

Starch Stärke

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“…185 illustrates the interface of the aerogel and water. 168 The aerogel can absorb light at the solid−gas interface, while the air between the aerogel and the liquid offers oxygen to the reaction. In a steady solution, the aerogel sample showed much better TOC (total organic carbon) removal efficiency than P25 powder.…”

Section: Water Purification and Sterilizationmentioning

confidence: 99%

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

Zhi

Tang

et al. 2022

Energy Fuels

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Metal oxide aerogels have emerged as a new class of photocatalysts. As a type of 3-dimensional (3D) porous structure, an aerogel owns the characteristics of high specific surface area, tunable pore size, and large pore volume, which can distinguish itself from conventional powder or film counterparts. Such merits allow aerogels to expose more active catalytic sites and support other active cocatalysts. Metal oxide aerogels in a monolithic form also overcome the recycling and separation issues that hinder the application of free-standing powder photocatalysts. This article reviews the typical synthesis methodologies of metal oxide aerogels, including alkoxide hydrolysis and condensation, epoxide assistant, and self-assembly. It also discusses the interfacial charge and mass transfer processes in metal oxide aerogels and correlations among the composition, microstructure, and photocatalytic activity. In addition, this article gives a summary of photocatalytic applications of aerogels in water purification and sterilization, solar water splitting, and gas-phase reactions such as CO 2 reduction and CO oxidation. It also discusses the strategies for enhancing the performance of aerogel photocatalysts. In particular, this paper highlights the recent development of plasmonic aerogel photocatalysts.

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“…What is more, the superhydrophobic photocatalytic efficiency still remained stable even after 20 cycles (Figure 7e). Taking advantage of these air−water−solid triphase systems, researchers fabricated a series of photocatalytic platforms for H 2 generation, 192,193 organic photodegradation, 194,195 and H 2 O 2 generation. 196,197 Due to superhydrophobicity, self-cleaning on a photocatalyst was enhanced due to the synergistic effect of strong water repellency and photocatalytic activity, 186−190 where the rolling drops remove macroscopic dirt and photocatalysis is induced by UV or solar light to ensure the photodegradation of organic pollution.…”

Section: Photocatalysts Based On Different Wettabilitiesmentioning

confidence: 99%

“…What is more, the superhydrophobic photocatalytic efficiency still remained stable even after 20 cycles (Figure e). Taking advantage of these air–water–solid triphase systems, researchers fabricated a series of photocatalytic platforms for H 2 generation, , organic photodegradation, , and H 2 O 2 generation. , …”

Section: Photocatalysts Based On Different Wettabilitiesmentioning

confidence: 99%

“…Due to superhydrophobicity, self-cleaning on a photocatalyst was enhanced due to the synergistic effect of strong water repellency and photocatalytic activity, − where the rolling drops remove macroscopic dirt and photocatalysis is induced by UV or solar light to ensure the photodegradation of organic pollution. For a superhydrophobic system, − because of the air–water–solid triphase joint interface, a continuous and steady gas channel is established, providing abundant gaseous reactants as well as the resulting quick gas transportations, This system overcomes the drawbacks of weak transfer of the dissolved gas and low solubility in liquid–solid diphase reaction systems. Meanwhile, the efficiency and/or selectivity of photocatalytic activities are sharply increased.…”

Section: Photocatalysts Based On Different Wettabilitiesmentioning

confidence: 99%

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Recent Advances in Photocatalysis Based on Bioinspired Superwettabilities

et al. 2021

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In the field of interface science, superwettability and photocatalysis are two significant research hot spots. Currently, wettability has been proved to be a decisive factor to enhance photocatalytic activity, such as self-cleaning, degradation efficiency, water purification, antibacterial, gas evaluation, reduction, fixation, H 2 O 2 generation, and so on. In this review, we summarize the recent developments of photocatalysts based on varied bioinspired wettabilities. In the beginning, the amazing wetting behaviors of natural creatures, i.e., superhydrophilic fish scale and clam shell, superhydrophobic lotus leaf and rose petal, patterned wettable desert beetle, slippery pitcher plant, and oleophobic springtail were are and their corresponding wetting models are also exhibited. Subsequently, the catalytic mechanisms of titanium dioxide (TiO 2 ) and graphitic carbon nitride (g-C 3 N 4 ) are discussed. Subsequently, materials based on bioinspired superwetting, including (super)hydrophilicity, superhydrophobicity, patterned superwetting, responsive (super)wetting, Janus (super)wetting, slippery, and superamphiphobicity, are respectively exemplified. Finally, concerns and outlooks related to bioinspired superwettable photocatalysts are proposed. It is believed that bioinspired superwetting in photocatalysis will become an emerging research hot spot in the near future.

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Superhydrophobic self-floating TiO2-silicone composite aerogels and their air–liquid-solid triphase photocatalytic system

Cited by 32 publications

References 60 publications

Sustainable Bio‐Based Wood Adhesive Incorporated Different Functionalized Nanoparticles: A Performance Comparison Study

Sustainable Bio‐Based Wood Adhesive Incorporated Different Functionalized Nanoparticles: A Performance Comparison Study

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

Recent Advances in Photocatalysis Based on Bioinspired Superwettabilities

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