Enhanced activity of mesoporous Nb2O5 for photocatalytic hydrogen production

Chen, Xinyi; Yu, Tao; Fan, Xiaoxing; Zhang, Haitao; Li, Zhaosheng; Ye, Jinhua; Zou, Zhigang

doi:10.1016/j.apsusc.2007.04.035

Cited by 173 publications

(109 citation statements)

References 41 publications

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“…The complementary H + reduction reaction may occur on the external surface, where some metal nanoparticles may be present, drawing the photogenerated electrons. This physical separation of the reaction sites may help to avoid charge recombination, more likely if both species, electrons, and holes, should else migrate towards the external surface [57].…”

Section: Materials and Mechanismsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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This paper focuses on the application of photocatalysis to hydrogen production from organic substrates. This process, usually called photoreforming, makes use of semiconductors to promote redox reactions, namely, the oxidation of organic molecules and the reduction of H + to H 2 . This may be an interesting and fully sustainable way to produce this interesting fuel, provided that materials efficiency becomes sufficient and solar light can be effectively harvested. After a first introduction to the key features of the photoreforming process, the attention will be directed to the needs for materials development correlated to the existing knowledge on reaction mechanisms. Examples are then given on the photoreforming of alcohols, the most studied topic, especially in the case of methanol and carbohydrates. Finally, some examples of more complex but more interesting substrates, such as waste solutions, are proposed.

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Section: Materials and Mechanismsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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“…Mesoporous Nb 2 O 5 has attracted much attention because of its special properties and applications in electrochromic, photocatalytic hydrogen production, gas sensors, electrocatalysis, and porous coating in electrochemical solar cells [1][2][3][4][5] etc. One of the important approaches to enhancing sensitivity is surface modification by proper choice of additives or dopants to the base oxide materials.…”

Section: Introductionmentioning

confidence: 99%

Development of wide band gap sensor based on AlNbO4 nanopowder for ethanol

Balamurugan

Subashini

Chaudhari

et al. 2012

Journal of Alloys and Compounds

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“…Nióbio surge como uma excelente alternativa como fotocatalisador, pois ele tem uma banda de energia adequada (3,4 eV) para fotólise da água. O Brasil possui as reservas de nióbio mais abundantes do mundo [4], e isso se torna mais um atrativo para o estudo desse material, além disso, há vários relatos de obtenção de óxidos de nióbio por anodização [5][6]. Para aumentar a eficiência da atividade fotocatalítica, e melhorar a produção de hidrogênio, são utilizados reagentes de sacrifício, por exemplo, metanol, etanol e etilamina [7].…”

Section: Introductionunclassified

Preparação E Caracterização De Fotocatalisadores De Óxido De Nióbio Aplicados Na Produção De Hidrogênio Utilizando Glicerol Como Agente De Sacrifício

Proença¹,

Correa²,

Rodrigues³

et al. 2017

Anais Do Enemet - Encontro Nacional De Estudantes De Engenharia Metalúrgica, De Materiais E De Minas

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ResumoFotocatalisadores de nióbio foram obtidos por anodização a 15 V, utilizando uma solução de K2HPO4 10% p/p em glicerol anidro como eletrólito por 15 minutos. As amostras foram caracterizadas por difração de raios-X para avaliação da estrutura cristalina obtida. A fotodegradação do glicerol (utilizado como agente de sacrifício) foi avaliada pela técnica de cromatografia líquida de alta eficiência. Palavras-chave: Nióbio; Hidrogênio; Fotocatálise; Anodização. PREPARATION AND CHARACTERIZATION OF NIOBIUM OXIDE APPLIED IN PHOTOGENERATION H2 USING GLYCERL AS SACRIFICE AGENT AbstractPhotocatalysts of niobium were obtained by anodization process at 15 V by using a solution of K2HPO4 10% w/w anhydrous glycerol as the electrolyte for 15 minutes. The samples were characterized by X-ray diffraction to evaluate the crystal structure obtained. The photodegradation of glycerol (used as a sacrificial agent) was assessed by liquid chromatography of high efficiency.

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Enhanced activity of mesoporous Nb2O5 for photocatalytic hydrogen production

Cited by 173 publications

References 41 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

Development of wide band gap sensor based on AlNbO4 nanopowder for ethanol

Preparação E Caracterização De Fotocatalisadores De Óxido De Nióbio Aplicados Na Produção De Hidrogênio Utilizando Glicerol Como Agente De Sacrifício

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