Fabrication of scalable and flexible bio-photoanodes by electrospraying thylakoid/graphene oxide composites

Shin, Hye In; Kim, Teayeop; Seo, Il Ho; Kim, Seon Il; Kim, Yong Jae; Hong, Hyeonaug; Park, Yunjeong; Jeong, Hyung Mo; Kim, Kyunghoon; Ryu, Wooseok

doi:10.1016/j.apsusc.2019.03.059

Cited by 25 publications

(20 citation statements)

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“…: larger surface contact, higher reactivity, and better disposal ability). Carbonaceous materials (carbon nanotubes (CNTs), active carbon (AC), and graphene) are known as potential counterparts in polymer-based composites owing to their high aspect ratio, mechanical strength, compatibility of the carbon matrix with the polymeric structure, and strong interactions and adhesion [113][114][115]. Polysulfone (PSf )/AC composite membrane was fabricated by Said et al [116] and showed that the concentration of AC plays a grave role in support of enhancing heavy metal removal from water.…”

Section: Applications Of Nemsmentioning

confidence: 99%

Heavy metal removal applications using adsorptive membranes

et al. 2020

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Water is a significant natural resource for humans. As such, wastewater containing heavy metals is seen as a grave problem for the environment. Currently, adsorption is one of the common methods used for both water purification and wastewater treatment. Adsorption relies on the physical and chemical interactions between heavy metal ions and adsorbents. Adsorptive membranes (AMs) have demonstrated high effectiveness in heavy metal removal from wastewater owing to their exclusive structural properties. This article examines the applications of adsorptive membranes such as polymeric membranes (PMs), polymer-ceramic membranes (PCMs), electrospinning nanofiber membranes (ENMs), and nano-enhanced membranes (NEMs), which demonstrate high selectivity and adsorption capacity for heavy metal ions, as well as both advantages and disadvantages of each one all, are summarized and compared shortly. Moreover, the general theories for both adsorption isotherms and adsorption kinetics are described briefly to comprehend the adsorption process. This work will be valuable to readers in understanding the current applications of various AMs and their mechanisms in heavy metal ion adsorption, as well as the recycling methods in heavy ions desorption process are summarized and described clearly. Besides, the influences of morphological and chemical structures of AMs are presented and described in detail as well.

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Section: Applications Of Nemsmentioning

confidence: 99%

Heavy metal removal applications using adsorptive membranes

et al. 2020

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“…However, even this level of photocurrent is favorably compared to reported values in which TMs are variously utilized, such as conjugation with oligoelectrolytes, assembly with nanostructured, and composition with nanostructured graphene oxide. [27][28][29] A possible reason may be the fact that vacuum application brings TM units in strong physical contact with the graphite surface, which in turn facilitates electron transfer. In the meantime, the Os-RP/ITOnp film showed only a limited current of 14 μA cm À 2 .…”

Section: Optimization Of a Tm/os-rp/itonp Film For Photocurrent Enhancementmentioning

confidence: 99%

Solar Energy Conversion through Thylakoid Membranes Wired by Osmium Redox Polymer and Indium Tin Oxide Nanoparticles

et al. 2021

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For several decades, much attention has been paid to thylakoid membranes (TMs) as photocatalysts for converting solar light to electricity. Despite extensive research, current technology provides only limited photocurrents. Here, a novel method based on TM-composite material was developed for achieving high photocurrent. When a thin film composed of TMs, osmium redox polymer (Os-RP), and indium tin oxide nanoparticles (ITOnp) was formed on a porous graphite surface, appreciable photocurrent as high as 0.5 mA cm À 2 was achieved at 0.4 V vs. Ag/AgCl. Each component plays its own role in transferring electrons from TMs to the anode, resulting in sharp drop in photocurrent with missing any component. Optimization between these three components showed 1 : 0.5 : 30 (TM/Os-RP/ ITOnp) was the best ratio. Action spectra confirmed that TMs was the origin of photocurrent. It was inferred from blocking experiments using 3-(3,4-dichlorophenyl)-1,1-dimethylurea as an inhibitor that about 41 % of photocurrent was transferred from Q A in photosystem II to the electrode via Os-RP and ITOnp. Quantum efficiencies at 430 and 660 nm were 12.2 and 18.5 %, respectively. Turnover frequency for water oxidation depended upon the amount of the composite. A complete cell with Pt/C cathode produced P max of 122 μW cm À 2 at 758 μA cm À 2 under one sun illumination, which is the highest power density to our knowledge. This study opened a possibility of using TMs as photocatalysts for solar energy conversion.

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“…Shi et al fabricated a PBA based on TMs/graphene oxide films electrosprayed on a metal support or on flexible indium tin oxidecoated polyethylene naphthalate films. A maximum photobiocurrent of 2.5 μA cm −2 was obtained for this design at 0.6 V vs. SHE under illumination of 1000 W m −2 [30].…”

Section: Mediators Electrode Materials and Modificationsmentioning

confidence: 84%

“…To investigate the influence of the capacitive unit on the overall photobiocurrent output, additional charge-storing electrodes with a variable capacitance were connected to the TMs-based photobioanode and a bilirubin oxidase-based biocathode demonstrating up to a 2.5-fold rise in photocurrent density from a separate PBA and 5 times higher maximum power output from complete PBES [33]. [8,[17][18][19][20][21][22][23][24]29,30,33,35].…”

Section: Device Configuration and Designmentioning

confidence: 99%