Biosynthesized Ag/α-Al<sub>2</sub>O<sub>3</sub> catalyst for ethylene epoxidation: the influence of silver precursors

Jing, Xiaolian; Wang, Huixuan; Chen, Huimei; Huang, Jiale; Li, Qingbiao; Sun, Daohua

doi:10.1039/c4ra03312d

Cited by 32 publications

(13 citation statements)

References 43 publications

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“…According to the results of DRUV-Vis and XRD analyses, Ag NPs are metallic. There is only a band of Ag 3d 5/2 for Ag/TiO 2 (367.6 eV) and Ag/TiO 2 -H 2 (367.5 eV) catalysts, which is due to the metallic Ag, 30,31 consistent with the results of DRUV-Vis and XRD analyses. As shown in Fig.…”

Section: Photocatalytic Performancesupporting

confidence: 84%

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst

Zeng

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Photocatalytic oxidation technology with semiconductor materials has shown great application prospects in environmental protection, energy and other fields. Developing a semiconductor material with high light conversion efficiency is a current scientific frontier problem. RESULTS A novel dark purple Ag/TiO2 catalyst with small energy gap of 2.27 eV was prepared and characterized using X‐ray diffraction, X‐ray photoelectron spectroscopy, transmission electron microscopy and diffuse reflectance UV–visible (DRUV‐Vis) techniques. Experimental results show that TiO2 phase transformation from anatase to rutile was inhibited in the presence of silver nanoparticles (Ag NPs) during hydrogenation. A surface disordered layer of 0.8–2.0 nm was formed which greatly enhanced light absorption according to DRUV‐Vis spectral analysis. Due to the favorable synergistic effect between Ag NPs and the surface disordered layer of TiO2, the dark purple Ag/TiO2 catalyst showed enhanced photocatalytic degradation activity. After utilization for five cycles, there was no significant decrease in the activity, suggesting high catalytic stability of the novel dark purple Ag/TiO2 catalyst. CONCLUSIONS The results verify that the novel dark purple Ag/TiO2 catalyst with small energy gap of 2.27 eV has enhanced photocatalytic performance. © 2021 Society of Chemical Industry (SCI).

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Section: Photocatalytic Performancesupporting

confidence: 84%

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst

Zeng

et al. 2021

J of Chemical Tech & Biotech

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“…The catalyst prepared by the bioreduction method had a satisfactory activity with regard to the lower Ag loading, low-oxygen conditions and higher space velocity, compared with those reported in other literature. 316 Ag/ a-Al 2 O 3 catalysts could also be prepared through the thermal decomposition method assisted by C. camphora extract. 315 Ag/a-Al 2 O 3 catalysts were also prepared for epoxidation of ethylene by the AR method with C. camphora extract.…”

Section: View Article Onlinementioning

confidence: 99%

Bio-inspired synthesis of metal nanomaterials and applications

et al. 2015

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“…We assigned this band to metallic silver with a slight increase in oxidation state (Ag δ+ ) arising from the interaction of the metallic silver nanoparticles and its MMT support, and hence, leading to an increase in the binding energy of metallic Ag. Such a mechanism is described in the literature [ 28 , 32 , 33 ]. In summary, for Ag_MMT silver is mostly present in the form of metal, whereas, for Al_MMT, the majority of the additional aluminum is oxidized.…”

Section: Resultsmentioning

confidence: 99%

Metal-Modified Montmorillonite as Plasmonic Microstructure for Direct Protein Detection

Giovannini

Garoli

Rupper

et al. 2021

Sensors

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Thanks to its negative surface charge and high swelling behavior, montmorillonite (MMT) has been widely used to design hybrid materials for applications in metal ion adsorption, drug delivery, or antibacterial substrates. The changes in photophysical and photochemical properties observed when fluorophores interact with MMT make these hybrid materials attractive for designing novel optical sensors. Sensor technology is making huge strides forward, achieving high sensitivity and selectivity, but the fabrication of the sensing platform is often time-consuming and requires expensive chemicals and facilities. Here, we synthesized metal-modified MMT particles suitable for the bio-sensing of self-fluorescent biomolecules. The fluorescent enhancement achieved by combining clay minerals and plasmonic effect was exploited to improve the sensitivity of the fluorescence-based detection mechanism. As proof of concept, we showed that the signal of fluorescein isothiocyanate can be harvested by a factor of 60 using silver-modified MMT, while bovine serum albumin was successfully detected at 1.9 µg/mL. Furthermore, we demonstrated the versatility of the proposed hybrid materials by exploiting their plasmonic properties to develop liquid label-free detection systems. Our results on the signal enhancement achieved using metal-modified MMT will allow the development of highly sensitive, easily fabricated, and cost-efficient fluorescent- and plasmonic-based detection methods for biomolecules.

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Biosynthesized Ag/α-Al₂O₃ catalyst for ethylene epoxidation: the influence of silver precursors

Cited by 32 publications

References 43 publications

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst

Bio-inspired synthesis of metal nanomaterials and applications

Metal-Modified Montmorillonite as Plasmonic Microstructure for Direct Protein Detection

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Biosynthesized Ag/α-Al2O3 catalyst for ethylene epoxidation: the influence of silver precursors

Cited by 32 publications

References 43 publications

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO2 catalyst

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO2 catalyst

Bio-inspired synthesis of metal nanomaterials and applications

Metal-Modified Montmorillonite as Plasmonic Microstructure for Direct Protein Detection

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Biosynthesized Ag/α-Al₂O₃ catalyst for ethylene epoxidation: the influence of silver precursors

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst

Excellent photocatalytic performance of hydrogenated dark purple Ag/TiO₂ catalyst