Synthesis of Ag nanoparticles prepared by a solution plasma method and application as a cocatalyst for photocatalytic reduction of carbon dioxide with water

Yoshida, Tomoko; Yamamoto, Naoto; Mizutani, Tadashi; Yamamoto, Masato; Ogawa, Soichi; Yagi, Shunsuke; Nameki, H.; Yoshida, Hisao

doi:10.1016/j.cattod.2017.08.047

Cited by 33 publications

(17 citation statements)

References 30 publications

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“…Conventionally, PANI nanoparticles have been synthesized via chemical, electrochemical, electrospinning, seeding polymerization, ultrasonic assisted polymerization, hard and soft templates, and interfacial polymerization methods [8,9,10,11,12,13,14,15,16,17,18,19,20]. Among these methods, the electrochemical solution plasma process (SPP) is a new, simple, and useful synthesis method of polymer nanoparticles, carbon nanomaterials, metal nanoparticles, surface treatment of polymers, purification of wastewater, and degradation of organic compounds, because this nonequilibrium plasma can provide rapid reaction and synthesis due to the reactive chemical species and radicals [21,22,23,24,25,26,27]. Electrical discharge in the solution phase is known as “SPP” and has recently been studied to be an effective synthesis method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Polyaniline Nanoparticle Using a Solution Plasma Process with an Ar Gas Bubble Channel

et al. 2019

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This work researched polymerization of liquid aniline monomer by solution plasma with a gas bubble channel and investigated characteristics of solution plasma and polyaniline (PANI). The injected gas bubble channel in the proposed solution plasma process (SPP) played a significant role in producing a stable discharge in liquid aniline monomer at a low voltage and furthermore enhancing the contact surface area between liquid aniline monomer and plasma, thereby achieving polymerization on the boundary of the liquid aniline monomer and plasma. Solution plasma properties were analyzed with voltage–current, optical emission spectroscopy, and high-speed camera. Conductivity, percentage yield, and firing voltage of PANI nanoparticle dispersed solution were measured. To investigate the characteristics of synthesized PANI nanoparticles, field emission scanning electron microscopy, dynamic light scattering, transmission electron microscopy, selective area electron diffraction (SAED) pattern, Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography, 1H-nuclear magnetic resonance (1H-NMR), and X-ray photo spectroscopy (XPS) were examined. The FTIR, 1H-NMR, and XPS analysis showed the PANI characteristic peaks with evidence that some quinoid and benzene rings were broken by the solution plasma process with a gas bubble channel. The results indicate that PANI nanoparticles have a spherical shape with a size between 25 and 35 nm. The SAED pattern shows the amorphous pattern.

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Section: Introductionmentioning

confidence: 99%

Synthesis of a Polyaniline Nanoparticle Using a Solution Plasma Process with an Ar Gas Bubble Channel

et al. 2019

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“…In 2011, the formation of carbon monoxide (CO) with a selectivity exceeding 50% along with the evolution of stoichiometric amounts of O 2 was first reported by Kudo group, when an Ag loaded BaLa 4 Ti 4 O 15 photocatalyst was irradiated by ultraviolet (UV) light under CO 2 atmosphere [15]. Following this study, various UV responsive semiconductor photocatalysts, such as, tantalumbased NaTaO 3 [16], ZnTa 2 O 6 [17], and Sr 2 KTa 5 O 15 [18], titanium-based K 2 Ti 6 O 13 [19], La 2 Ti 2 O 7 [20], and SrTiO 3 [21,22], and gallium-based Ga 2 O 3 [23], and ZnGa 2 O 4 [24], were found to be active for photocatalytic reduction of CO 2 by H 2 O when they were modified with a universal Ag cocatalyst. However, their solar energy conversion efficiencies have been quite limited, since the UV region only accounts for 4% of the sunlight spectrum.…”

Section: Introductionmentioning

confidence: 99%

Current dilemma in photocatalytic CO2 reduction: real solar fuel production or false positive outcomings?

Zhang

Chen

et al. 2022

Carb Neutrality

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Solar driven carbon dioxide (CO2) recycling into hydrocarbon fuels using semiconductor photocatalysts offers an ideal energy conversion pathway to solve both the energy crisis and environmental degradation problems. However, the ubiquitous presence of carbonaceous contaminants in photocatalytic CO2 reduction system and the inferior yields of hydrocarbon fuels raise serious concerns about the reliability of the reported experimental results. Here in this perspective, we focus on the accurate assessment of the CO2 reduction products, systemically discuss the possible sources of errors in the product quantification, elaborate the common mistakes spread in the analysis of reaction products obtained in 13CO2 labelling experiments, and further propose reliable protocols for reporting the results of these isotopic tracing experiments. Moreover, the challenges and cautions in the precise measurement of O2 evolution rate are also depicted, and the amplification of the concentration of O2 in photoreactors well above the limit of detection is still demonstrated to be the most effective solution to this troublesome issue. We hope the viewpoints raised in this paper will help to assessment the reliability of the reported data in future, and also benefit the beginners that intend to dive in the photocatalytic CO2 reduction area. Graphical abstract

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“…Silver nanoparticles (Ag NPs) have been explored as a possible catalyst for Ga 2 O 3 nanowire growth [9,24,25]. In addition, silver has been used as a photocatalyst and doping material for different materials such as MoS 2 , SnO 2 nanostructures, and TiO 2 /SnO 2 nanocomposite [26,27,28].…”

Section: Introductionmentioning

confidence: 99%

Dynamics Contributions to the Growth Mechanism of Ga2O3 Thin Film and NWs Enabled by Ag Catalyst

et al. 2019

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In the last few years, interest in the use of gallium oxide (Ga2O3) as a semiconductor for high power/high temperature devices and UV nano-sensors has grown. Ga2O3 has an enormous band gap of 4.8 eV, which makes it well suited for applications in harsh environments. In this work, we explored the effect of Ag thin film as a catalyst to grow gallium oxide. The growth of gallium oxide thin film and nanowires can be achieved by heating and oxidizing pure gallium at high temperatures (~1000 °C) in the presence of trace amounts of oxygen. We present the results of structural, morphological, and elemental characterization of the β-Ga2O3 thin film and nanowires. In addition, we explore and compare the sensing properties of the β-Ga2O3 thin film and nanowires for UV detection. The proposed process can be optimized to a high scale production Ga2O3 nanocrystalline thin film and nanowires. By using Ag thin film as a catalyst, we can control the growth parameters to obtain either nanocrystalline thin film or nanowires.

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Synthesis of Ag nanoparticles prepared by a solution plasma method and application as a cocatalyst for photocatalytic reduction of carbon dioxide with water

Cited by 33 publications

References 30 publications

Synthesis of a Polyaniline Nanoparticle Using a Solution Plasma Process with an Ar Gas Bubble Channel

Synthesis of a Polyaniline Nanoparticle Using a Solution Plasma Process with an Ar Gas Bubble Channel

Current dilemma in photocatalytic CO2 reduction: real solar fuel production or false positive outcomings?

Dynamics Contributions to the Growth Mechanism of Ga2O3 Thin Film and NWs Enabled by Ag Catalyst

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