Ammonium oxidization at room temperature and plasmonic photocatalytic enhancement

Huang, Hung Ji; Liu, Bo-Heng; Yeh, J. Andrew

doi:10.1016/j.catcom.2013.02.019

Cited by 10 publications

(9 citation statements)

References 27 publications

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“…In SDRs (Figure 2h and Figure 3a) [24,[55][56][57][58][59][60][61], a reaction disk rotates to drive the fluid to move on top of it. The fluidic layer near the deposited photocatalyst moves faster than other layers above.…”

Section: Types Of Reactors For Photocatalytic Reactionsmentioning

confidence: 99%

Review of Experimental Setups for Plasmonic Photocatalytic Reactions

Huang

Chiang

et al. 2019

Catalysts

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Plasmonic photocatalytic reactions have been substantially developed. However, the mechanism underlying the enhancement of such reactions is confusing in relevant studies. The plasmonic enhancements of photocatalytic reactions are hard to identify by processing chemically or physically. This review discusses the noteworthy experimental setups or designs for reactors that process various energy transformation paths for enhancing plasmonic photocatalytic reactions. Specially designed experimental setups can help characterize near-field optical responses in inducing plasmons and transformation of light energy. Electrochemical measurements, dark-field imaging, spectral measurements, and matched coupling of wavevectors lead to further understanding of the mechanism underlying plasmonic enhancement. The discussions herein can provide valuable ideas for advanced future studies.

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Section: Types Of Reactors For Photocatalytic Reactionsmentioning

confidence: 99%

Review of Experimental Setups for Plasmonic Photocatalytic Reactions

Huang

Chiang

et al. 2019

Catalysts

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“…A servomotor rotated the glass reaction disk in the reactor at a constant speed of 150 rpm. Wide-spectrum visible light from a halogen lamp illuminated a hot area on the reaction disk coated by an 8 nm Pt thin film, 15,16 supporting the plasmonic endothermic reaction. A sample solution of NH 4 Cl was prepared, and its pH was adjusted by the addition of NaOH.…”

Section: Methodsmentioning

confidence: 96%

“…15,16 The SDR is a green technology that provides high processing efficiency and low power consumption while occupying a small physical space. 15,16,[22][23][24][25] The room-temperature oxidation of NH 4 + was achieved under alkaline conditions with the addition of sodium hydroxide (NaOH). A servomotor rotated the glass reaction disk in the reactor at a constant speed of 150 rpm.…”

Section: Methodsmentioning

confidence: 99%

“…Many studies have been conducted on the enhancement of photocatalytic reactions by generated plasmons, and these enhancements have been explained using various physical models. [8][9][10][11][12][13][14][15][16][17] Recently, quantum hot charge carriers (QHC), or hot electrons, generated by the decay of a plasmon were demonstrated to greatly enhance photocatalytic reactions. [2][3][4][5]18 In this study, the plasmonic enhancement of the chemical oxidization of ammonium ions in water is presented.…”

Section: Introductionmentioning

confidence: 99%

“…(1), an increase in the system temperature T enhances the reaction rate constant k. In previous studies, the room-temperature oxidation of NH 4 + with hydroxyl ions (OH − ) under alkaline conditions 15 was conducted using high-efficiency spinning disk reactors (SDRs). 15,16,21 The large increase in the mass transfer rate of the test solution provided by the SDR greatly enhanced the oxidization process of NH 4 + by OH − . Light irradiation from a halogen lamp provided the light energy required to enhance the processing efficiency of the endothermic oxidization of NH 4 + ions.…”

Section: Introductionmentioning

confidence: 99%

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Plasmonic photocatalytic reactions enhanced by hot electrons in a one-dimensional quantum well

et al. 2015

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The plasmonic endothermic oxidation of ammonium ions in a spinning disk reactor resulted in light energy transformation through quantum hot charge carriers (QHC), or quantum hot electrons, during a chemical reaction. It is demonstrated with a simple model that light of various intensities enhance the chemical oxidization of ammonium ions in water. It was further observed that light illumination, which induces the formation of plasmons on a platinum (Pt) thin film, provided higher processing efficiency compared with the reaction on a bare glass disk. These induced plasmons generate quantum hot electrons with increasing momentum and energy in the one-dimensional quantum well of a Pt thin film. The energy carried by the quantum hot electrons provided the energy needed to catalyze the chemical reaction. The results indicate that one-dimensional confinement in spherical coordinates (i.e

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Near‐Perfect Ultrathin Nanocomposite Absorber with Self‐Formed Topping Plasmonic Nanoparticles

Raza

Noorulla

et al. 2017

Advanced Optical Materials

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Nanocomposites, consisting of metallic nanoparticles embedding in a dielectric host, can significantly enhance light–matter interactions in solar energy conversion and optical applications. In this contribution, a class of scalable ultrathin nanocomposite films with self‐formed topping plasmonic nanoparticles is proposed. Just by controlling the high‐throughput co‐sputtering process, the nanocomposite absorbers can achieve near 100% light absorption in the wavelength ranges from 300 to 800 nm. Through systematic experiments and numerical studies, three mechanisms for this near‐perfect absorption are further revealed: impedance matching of ultrathin nanocomposite film with tunable filling factor, excitation of localized surface plasmon induced by self‐formed topping nanoparticles, and near‐field coupling between the topping nanoparticles and bottom metallic reflective layer. With these merits, the proposed ultrathin nanocomposite absorbers have demonstrated their outstanding omnidirectional absorptance over the wide solar irradiance spectrum ranging from 250 to 2000 nm.

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Ammonium oxidization at room temperature and plasmonic photocatalytic enhancement

Cited by 10 publications

References 27 publications

Review of Experimental Setups for Plasmonic Photocatalytic Reactions

Review of Experimental Setups for Plasmonic Photocatalytic Reactions

Plasmonic photocatalytic reactions enhanced by hot electrons in a one-dimensional quantum well

Near‐Perfect Ultrathin Nanocomposite Absorber with Self‐Formed Topping Plasmonic Nanoparticles

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