Photocatalytic hydrogen production and photodegradation of organic dyes of hydrogenated TiO2 nanofibers decorated metal nanoparticles

Wu, Ming‐Chung; Huang, Wei-Kang; Lin, Ting‐Han; Lu, Yu-Jen

doi:10.1016/j.apsusc.2018.10.240

Cited by 28 publications

(5 citation statements)

References 69 publications

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“…Based on our best knowledge, excellent ordering in highly crystalline TiO 2 NF retains the numbers of electron-hole pairs and avoids the recombination as irradiated. When Pd NP locates at the interface of a metal oxide such as TiO 2 , the Schottky barrier forms and facilitates electron rectification, not back to metal oxide as electron once passes through the interface [6]. Thus, the optimal 5.0 wt% g-C 3 N 4 /TiO 2 catalyst with sufficient active sites and efficient charge transfer revealed significant photocatalytic activities.…”

Section: Resultsmentioning

confidence: 99%

Nanoscale Multidimensional Pd/TiO2/g-C3N4 Catalyst for Efficient Solar-Driven Photocatalytic Hydrogen Production

et al. 2021

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Solar-to-fuel conversion is an innovative concept for green energy, attracting many researchers to explore them. Solar-driven photocatalysts have become an essential solution to provide valuable chemicals like hydrogen, hydrocarbon, and ammonia. For sustainable stability under solar irradiation, titanium dioxide is regarded as an acceptable candidate, further showing excellent photocatalytic activity. Incorporating the photo-sensitizers, including noble metal nanoparticles and polymeric carbon-based material, can improve its photoresponse and facilitate the electron transfer and collection. In this study, we synthesized the graphitic carbon nitride (g-C3N4) nanosheet incorporated with high crystalline TiO2 nanofibers (NF) as 1D/2D heterostructure catalyst for photocatalytic water splitting. The microstructure, optical absorption, crystal structure, charge carrier dynamics, and specific surface area were characterized systematically. The low bandgap of 2D g-C3N4 nanosheets (NS) as a sensitizer improves the specific surface area and photo-response in the visible region as the incorporated amount increases. Because of the band structure difference between TiO2 and g-C3N4, constructing the heterojunction formation, the superior separation of electron-hole is observed. The detection of reactive oxygen species and photo-assisted Kelvin probe microscopy are conducted to investigates the possible charge migration. The highest photocatalytic hydrogen production rate of Pd/TiO2/g-C3N4 achieves 11.62 mmol·h−1·g−1 under xenon lamp irradiation.

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Section: Resultsmentioning

confidence: 99%

Nanoscale Multidimensional Pd/TiO2/g-C3N4 Catalyst for Efficient Solar-Driven Photocatalytic Hydrogen Production

et al. 2021

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“…The photocatalytic production of hydrogen was studied for several years and there are many catalysts used for this purpose, such as TiO 2 based photocatalysts [12][13][14][15]. For example, a recent study reports the photocatalytic production of molecular hydrogen with TiO 2 -based catalysts decorated with several metal nanoparticles (Ag, Co, Cr, Cu, Ni, Pd, Pt), starting from aqueous solutions containing an organic dye (brilliant green) [16]. Pd doped TiO 2 was used for molecular hydrogen production from ethanol aqueous solution [17].…”

Section: Introductionmentioning

confidence: 99%

LaFeO3 Modified with Ni for Hydrogen Evolution via Photocatalytic Glucose Reforming in Liquid Phase

et al. 2021

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In this work, the optimization of Ni amount on LaFeO3 photocatalyst was studied in the photocatalytic molecular hydrogen production from glucose aqueous solution under UV light irradiation. LaFeO3 was synthesized via solution combustion synthesis and different amount of Ni were dispersed on LaFeO3 surface through deposition method in aqueous solution and using NaBH4 as reducing agent. The prepared samples were characterized with different techniques: Raman spectroscopy, UltraViolet-Visible Diffuse Reflectance Spettroscopy (UV–Vis-DRS), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), X-ray Fluorescence (XRF), Transmission Electron microscopy (TEM), and Scanning Electron microscopy (SEM) analyses. For all the investigated photocatalysts, the presence of Ni on perovskite surface resulted in a better activity compared to pure LaFeO3. In particular, it is possible to identify an optimal amount of Ni for which it is possible to obtain the best hydrogen production. Specifically, the results showed that the optimal Ni amount was equal to nominal 0.12 wt% (0.12Ni/LaFeO3), for which the photocatalytic H2 production was equal to 2574 μmol/L after 4 h of UV irradiation. The influence of different of photocatalyst dosage and initial glucose concentration was also evaluated. The results of the optimization of operating parameters indicated that the highest molecular hydrogen production was achieved on 0.12Ni/LaFeO3 sample with 1.5 g/L of catalyst dosage and 1000 ppm initial glucose concentration. To determine the reactive species that play the most significant role in the photocatalytic hydrogen production, photocatalytic tests in the presence of different radical scavengers were performed. The results showed that •OH radical plays a significant role in the photocatalytic conversion of glucose in H2. Moreover, photocatalytic tests carried out with D2O instead of H2O evidenced the role of water molecules in the photocatalytic production of molecular hydrogen in glucose aqueous solution.

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“…Due to the low loading capacity of metal precursors, the use of metal precursors and polymers to manufacture metal fibers may limit the measurement of their magnetic and electrical properties. Metal/ceramic precursors can overcome these shortcomings and have been widely used in the fabrication of different types of metals, metal oxides, − and their carbon composite fibers. − The metal/ceramic acetate precursor fiber was first obtained by electrospinning technology, and the composite nanomaterials can be generated after calcination. Barakat et.…”

Section: Overview and Design Of Electrospun Nanofibrous Hybrid Materialsmentioning

confidence: 99%

Functional Electrospun Nanofibrous Hybrid Materials for Colorimetric Sensors: A Review

Li,

Song,

et al. 2024

ACS Omega

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Electrospun nanofibrous hybrid materials have several advantageous characteristics, including easy preparation, high porosity, and a large specific surface area. Meanwhile, they can be more suitable for colorimetric detection in environmental and food areas than organic materials due to the advantages of inorganic nanomaterials, i.e., stability, low toxicity, and durability. In addition to being able to immobilize nanomaterials to avoid particle aggregation, electrospinning hybrid materials also have the advantages of high specific surface area and high porosity, which is beneficial for constructing colorimetric sensors. This review mainly summarizes the fabrication methods of electrospun nanofibrous hybrid materials and the application of electrospun nanofibrous hybrid material based colorimetric sensors. First, the preparation strategies of electrospun nanofibrous hybrid materials were discussed. Then, the applications of the obtained electrospun nanofibrous hybrid materials in the colorimetric sensors for environmental molecules in the gas and liquid phase were further investigated. Finally, this review looks forward to the development prospects and challenges of electrospun hybrid materials in practical applications of colorimetric sensors in order to support the application of colorimetric sensors in practical detection.

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Photocatalytic hydrogen production and photodegradation of organic dyes of hydrogenated TiO2 nanofibers decorated metal nanoparticles

Cited by 28 publications

References 69 publications

Nanoscale Multidimensional Pd/TiO2/g-C3N4 Catalyst for Efficient Solar-Driven Photocatalytic Hydrogen Production

Nanoscale Multidimensional Pd/TiO2/g-C3N4 Catalyst for Efficient Solar-Driven Photocatalytic Hydrogen Production

LaFeO3 Modified with Ni for Hydrogen Evolution via Photocatalytic Glucose Reforming in Liquid Phase

Functional Electrospun Nanofibrous Hybrid Materials for Colorimetric Sensors: A Review

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