A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO
“…Characteristic peaks at 2 θ = 30.1°, 43.1° and 53.5° are observed in the PU@ZnO@Fe 3 O 4 @SA sponge sample. These peaks fit well with the Fe 3 O 4 patterns (JCPDS No.65–3107) reported in previous studies 26,27 . The absence of any signals of impurities in the XRD patterns confirms the high purity level of the fabricated samples.Figure 2XRD pattern of sponges samples.
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We report a novel superhydrophobic material based on commercially available polyurethane (PU) sponge with high porosity, low density and good elasticity. The fabrication of a superhydrophobic sponge capable of efficiently separating oil from water was achieved by imitating or mimicking nature’s designs. The original PU sponge was coated with zinc oxide (ZnO), stearic acid (SA) and iron oxide particles (Fe3O4) via a facile and environmentally friendly method. After each treatment, the properties of the modified sponge were characterized, and the changes in wettability were examined. Water contact angle (WCA) measurements confirmed the excellent superhydrophobicity of the material withhigh static WCA of 161° andlow dynamic WCA (sliding WCA of 7° and shedding WCA of 8°). The fabricated sponge showed high efficiency in separation (over 99%) of different oils from water. Additionally, the fabricated PU@ZnO@Fe3O4@SA sponge could be magnetically guided to quickly absorb oil floating on the water surface. Moreover, the fabricated sponge showed excellent stability and reusability in terms of superhydrophobicity and oil absorption capacity. The durable, magnetic and superhydrophobic properties of the fabricated sponge render it applicable to the cleanup of marine oil spills and other oil-water separation issues, with eco-friendly recovery of the oil by simple squeezing process.
“…Characteristic peaks at 2 θ = 30.1°, 43.1° and 53.5° are observed in the PU@ZnO@Fe 3 O 4 @SA sponge sample. These peaks fit well with the Fe 3 O 4 patterns (JCPDS No.65–3107) reported in previous studies 26,27 . The absence of any signals of impurities in the XRD patterns confirms the high purity level of the fabricated samples.Figure 2XRD pattern of sponges samples.
…”
We report a novel superhydrophobic material based on commercially available polyurethane (PU) sponge with high porosity, low density and good elasticity. The fabrication of a superhydrophobic sponge capable of efficiently separating oil from water was achieved by imitating or mimicking nature’s designs. The original PU sponge was coated with zinc oxide (ZnO), stearic acid (SA) and iron oxide particles (Fe3O4) via a facile and environmentally friendly method. After each treatment, the properties of the modified sponge were characterized, and the changes in wettability were examined. Water contact angle (WCA) measurements confirmed the excellent superhydrophobicity of the material withhigh static WCA of 161° andlow dynamic WCA (sliding WCA of 7° and shedding WCA of 8°). The fabricated sponge showed high efficiency in separation (over 99%) of different oils from water. Additionally, the fabricated PU@ZnO@Fe3O4@SA sponge could be magnetically guided to quickly absorb oil floating on the water surface. Moreover, the fabricated sponge showed excellent stability and reusability in terms of superhydrophobicity and oil absorption capacity. The durable, magnetic and superhydrophobic properties of the fabricated sponge render it applicable to the cleanup of marine oil spills and other oil-water separation issues, with eco-friendly recovery of the oil by simple squeezing process.
“…Ye and co‐workers have developed the utilization of semimetal bismuth to capture the NIR light for solar thermal promoting the photocatalytic activity of Bi 4 O 5 I 2 . Wu and co‐workers have proven the harvesting of NIR light energy by a core–shell‐structured Fe 3 O 4 @SiO 2 to promote the photocatalytic activity of a series of classical TiO 2 , g‐C 3 N 4 , BiOI, and CeO 2 photocatalysts . Together, these reports consolidate that photothermal effect plays an important role in promoting solar energy conversion.…”
Section: Categories Of the Visible–nir Light Harvestersmentioning
confidence: 86%
“…Hu et al have synthesized Fe 3 O 4 @SiO 2 core–shell structure as the photothermal material to capture NIR light and mixed with P25 to promote the photocatalytic oxidation activity of NO. The surface temperature of the sample rises from 25 to 59.7 °C in 120 min under UV–vis–NIR light irradiation (Figure e) . The rate of photocatalytic oxidation of NO increased by 38.9% compared to pure P25.…”
Section: Solar Thermal Promoted Photocatalytic Purification and Fuel mentioning
confidence: 99%
“…Moreover, some nonplasmonic metals such as bismuth and metal oxides such as Fe 3 O 4 and CuO have also been reported as photothermal materials to promote solar energy utilization for photocatalysis. Ye and co‐workers have developed the utilization of semimetal bismuth to capture the NIR light for solar thermal promoting the photocatalytic activity of Bi 4 O 5 I 2 .…”
Section: Categories Of the Visible–nir Light Harvestersmentioning
confidence: 99%
“…e) Thermal images of various samples upon light irradiation; f) promotion of photocatalytic activity for different photocatalysts. e,f) Reproduced with permission . Copyright 2017, Elsevier.…”
Section: Solar Thermal Promoted Photocatalytic Purification and Fuel mentioning
Utilization of diffusive solar energy through photocatalytic processes for environmental purification and fuel production has long been pursued. However, efficient capture of visible-near-infrared (NIR) photons, especially for those with wavelengths longer than 600 nm, is a demanding quest in photocatalysis owing to their relatively low energy. In recent years, benefiting from the advances in photoactive material design, photocatalytic reaction system optimization, and new emerging mechanisms for long-wavelength photon activation, increasing numbers of studies on the harnessing of visible-NIR light for solar-to-chemical energy conversion have been reported. Here, the aim is to comprehensively summarize the progress in this area. The main strategies of the long-wavelength visible-NIR photon capture and the explicitly engineered material systems, i.e., narrow optical gap, photosensitizers, upconversion, and photothermal materials, are elaborated. In addition, the advances in long-wavelength light-driven photo- and photothermal-catalytic environmental remediation and fuel production are discussed. It is anticipated that this review presents the forefront achievements in visible-NIR photon capture and at the same time promotes the development of novel visible-NIR photon harnessing catalysts toward efficient solar energy utilization.
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