Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation

Nsib, Mohamed Faouzi; Naffati, Naima; Rayes, Ali; Moussa, Noomen; Houas, Ammar

doi:10.1016/j.materresbull.2015.04.067

Cited by 22 publications

(17 citation statements)

References 66 publications

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“…hydrogen productiona re the presence,t ype,p article size, and loading amount of cocatalysts, [41,63,67,84,86,101,120,136] and the presence,t ype,a nd concentration of sacrificial agents. [51,101,104,107,108,123,[137][138][139][140] Less studied but equally relevant for large-scale applications are the effects of light intensity [43] and photocatalyst concentration [128] because of the possible screening effect on the bulk of the reaction media. Most researchers vary one or two factors independently to define the best combinations of factors; as ar esult, interaction effects are usually not involved in these studies.…”

Section: Introduction Hydrogen Role In Energy Scenariomentioning

confidence: 99%

“…[90] However, the most studied material is TiO 2 . [42,[91][92][93][94][95][96][97] Usually,t he catalytic proper-ties of these materials are improved by using sacrificial agents or modificationt echniques.O rganic species such as alcohols [61,66,[98][99][100][101][102] and glycerol [52,53,[103][104][105][106][107][108] are typicals acrificial agents used as electron donors or hole scavengers.T here are three main usual modificationt echniques to improve the photocatalytic process:c ombinationw ith metals, [41, 44, 45, 49, 51, 52, 58, 60, 61, 64, 67, 78, 84, 87-89, 92, 94-96, 99-102, 104, 105, 109-124] combination with other semiconductors, [63,67,116,117,121,[125][126][127][128][129][130][131][132][133][134][135] and cation or anion doping. [103,106] These many options createavery wide net of possible combinations,w hich makes it difficult to optimize and quantify the effect of the numerous variables affectingh ydrogen productivity.…”

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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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Section: Introduction Hydrogen Role In Energy Scenariomentioning

confidence: 99%

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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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“…Particle size and loading amount of co‐catalysts,,, type and concentration of sacrificial agents,,,, have been studied too. Less studied but equally relevant for bigger scale applications are the effects of light intensity and photocatalyst concentration because of the possible screening effect on the bulk of the reaction media …”

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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“…Nsib et al . synthesized Ni/Zn/PANI hybrid photocatalysts for hydrogen production from water splitting under visible irradiation 22 . Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

“…studied the influence of plasmonic Au nanoparticles on the photoactivity of Fe 2 O 3 electrodes for water splitting with ABPE efficiency of 1% and J ph value of 1.2 mA.cm −2 using NaOH as an electrolyte 30 . There are some limitations of some previous studies such as difficulty and high-cost techniques used in the preparation of photo nanocomposites such as pulsed laser deposition and electrodeposition station 22 , 23 .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic properties of PbS/graphene oxide/polyaniline electrode for hydrogen generation

Abukhadra

Rabia

Elsayed

et al. 2017

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In this work, roll-graphene oxide (Ro-GO), polyaniline (PANI) nano/microparticles, and PbS nanoparticles were prepared by modified Hammer, oxidative polymerization, and chemical bath deposition methods, respectively. These nano/microstructures were characterized, optimized, and designed to form PbS/Ro-GO/PANI nano/microcomposite. Also, the ratios of PbS and Ro-GO were optimized, and the optimized composition of the used composite was 0.4 g PANI, 0.125 g Ro-GO, and 0.075 g PbS. The band gap values for PANI, PbS, Ro-GO, and PbS/Ro-GO/PANI rocomposite were 3, 1.13, 2.86, (1.16, 2) eV, respectively. Two photoelectrode assemblies, Au/PbS/Ro-GO/PANI and PbS/Ro-GO/PANI/ITO/glass were used for the photoelectrochemical (PEC) hydrogen generation. In the first assembly 45 nm- Au layer was sputtered on the surface of a disk of PbS/Ro-GO/PANI composite. For the second assembly, a disk of PbS/Ro-GO/PANI composite was glued on ITO glass using Ag-THF paste. The lifetime efficiency values were 64.2 and 43.4% for the first and second electrode for 2 h, respectively. Finally, the incident photon-to-current conversion efficiency (IPCE) and photon-to-current efficiency (ABPE) were calculated under monochromatic illumination conditions. The optimum IPCE efficiency at 390 nm was 9.4% and 16.17%, whereas ABPE % efficiency was 1.01% and 1.75% for Au/PbS/Ro-GO/PANI and PbS/Ro-GO/PANI/ITO/glass, respectively.

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Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation

Cited by 22 publications

References 66 publications

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

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

Photocatalytic properties of PbS/graphene oxide/polyaniline electrode for hydrogen generation

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Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation

Cited by 22 publications

References 66 publications

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

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

Photocatalytic properties of PbS/graphene oxide/polyaniline electrode for hydrogen generation

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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