Photocatalytic hydrogen production with visible light using nanocomposites of CdS and Ni on niobium oxide

Balcerski, William; Ryu, Su Young; Hoffmann, Michael R.

doi:10.1016/j.seppur.2015.09.054

Cited by 16 publications

(8 citation statements)

References 34 publications

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“…The deconvoluted peaks of the two spin-orbit peaks of Cd, namely Cd 3d3 and Cd 3d5 , are shown in (Cd-O). [29,30] The appearance of Cd-O may be due to the surface oxidation of CdS QDs in the air.…”

Section: Structural and Optical Characterizationmentioning

confidence: 99%

Preparation and photoelectric properties of cadmium sulfide quantum dots

Tang

Guo

et al. 2019

Chinese Phys. B

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Cadmium sulfide quantum dots (CdS QDs) are widely used in solar cells, light emitting diodes, photocatalysis and biological imaging because of their unique optical and electrical properties. However, there are some drawbacks in existing preparation techniques of CdS QDs, such as protection of inert gas, lengthy reaction time, high reaction temperature, poor crystallinity and non-uniform particle size distribution. In this study, we prepared CdS QDs by liquid phase synthesis under ambient room temperature and atmospheric pressure using sodium alkyl sulfonate, CdCl 2 and Na 2 S as capping agent, cadmium and sulfur sources respectively. The technique offers facile preparation, efficient reaction, low-cost, and controllable particle size. The as-prepared CdS QDs exhibited good crystallinity, excellent monodispersity and uniform particle size. The responsivity of CdS QDs based photodetector was greater than 0.3 μA/W, which makes them suitable for use as UV detector.

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Section: Structural and Optical Characterizationmentioning

confidence: 99%

Preparation and photoelectric properties of cadmium sulfide quantum dots

Tang

Guo

et al. 2019

Chinese Phys. B

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“…Some materials used for these applications are transition metal oxides, oxynitrides, oxysulfides, metal sulfides, and perovskite oxides . However, the most studied material is TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Organic species such as alcohols and glycerol are typical sacrificial agents used as electron donors or hole scavengers. There are three main usual modification techniques to improve the photocatalytic process: combination with metals, combination with other semiconductors, and cation or anion doping …”

Section: Introductionmentioning

confidence: 99%

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

et al. 2018

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Several factors affect photocatalytic hydrogen productivity from the photoreforming of organic compounds, which makes it difficult to optimize operational conditions in photoreactors. To prioritize these factors, we focused on the quantification of the effect of five of them on hydrogen production. Photocatalytic experiments were performed on 67 mL batch photoreactors under UV‐LED lamps (λ=375 nm) using a suspension of TiO2–Au nanoparticles synthesized by a sol–gel approach. The analyzed factors were: (A) presence of Au as a cocatalyst, (B) type of alcohol as the electron donor, (C) intensity of UV light, (D) electron donor concentration, and (E) nanoparticle concentration. A main and interaction effects analysis is presented with reduced fixed effect models for three responses: total hydrogen generation, catalyst productivity, and electron donor productivity. The presence of Au as a cocatalyst (A), the intensity of UV light (C), and their interaction (AC) were the factors with the highest effect. The best configuration allowed us to reach a catalyst productivity of 2925 μmolnormalH2 g−1 h−1.

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“…The formation of a Schottky barrier at the metal/TiO 2 interface helps the photopromoted electrons migrate from the conduction band of the semiconductor to the metal, resulting in a decrease in electron–hole pair recombination. Various metals have been used as co‐catalysts on a titanium surface including Pt, Pd, Cu,,, Ni, Rh,,, Ag, and Au ,. Of these, the best yields in terms of photocatalytic production of H 2 have been obtained with Pt/TiO 2 and Au/TiO 2 ,.…”

Section: Introductionmentioning

confidence: 99%

Operational Conditions Affecting Formaldehyde and Formic Acid Formation as By‐Products of Hydrogen Production via Photo‐Reforming of Methanol Using Nanoparticles of TiO₂

et al. 2018

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It is important to understand how the operational conditions affect the photocatalytic hydrogen production and how to increase the production of valuable by-products, such as formaldehyde and formic acid from the photo-reforming of methanol. It is difficult to optimize operational conditions in photoreactors because several factors affect the process. To prioritize them, we focused on the quantification of the effect of four factors on CH 2 O and CH 2 O 2 production: (A) presence of gold as co-catalyst, (B) intensity of UV-light, (C) methanol concentration, and (D) nanoparticle concentration. A main and interaction effects analysis is presented with fixed effect models for four responses: total production and catalyst productivity for both by-products. Factor A showed the highest effect, followed by factors B and C, and the interactions AB and AC showed signs of influencing the catalyst selectivity with possible mechanistic variations. Factor D showed negative effect on catalyst productivities possibly related to shielding effect between particles.

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Photocatalytic hydrogen production with visible light using nanocomposites of CdS and Ni on niobium oxide

Cited by 16 publications

References 34 publications

Preparation and photoelectric properties of cadmium sulfide quantum dots

Preparation and photoelectric properties of cadmium sulfide quantum dots

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

Operational Conditions Affecting Formaldehyde and Formic Acid Formation as By‐Products of Hydrogen Production via Photo‐Reforming of Methanol Using Nanoparticles of TiO₂

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Photocatalytic hydrogen production with visible light using nanocomposites of CdS and Ni on niobium oxide

Cited by 16 publications

References 34 publications

Preparation and photoelectric properties of cadmium sulfide quantum dots

Preparation and photoelectric properties of cadmium sulfide quantum dots

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

Operational Conditions Affecting Formaldehyde and Formic Acid Formation as By‐Products of Hydrogen Production via Photo‐Reforming of Methanol Using Nanoparticles of TiO2

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Operational Conditions Affecting Formaldehyde and Formic Acid Formation as By‐Products of Hydrogen Production via Photo‐Reforming of Methanol Using Nanoparticles of TiO₂