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PubMed Journals Articles About "Lightweight Catalyst Artificial Photosynthesis" RSS

12:26 EDT 24th June 2018 | BioPortfolio

Lightweight Catalyst Artificial Photosynthesis PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Lightweight Catalyst Artificial Photosynthesis articles that have been published worldwide.

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Showing "Lightweight Catalyst Artificial Photosynthesis" PubMed Articles 1–25 of 2,700+

Artificial Photosynthesis: Beyond Mimicking Nature.

In this Editorial, Guest Editors Holger Dau, Etsuko Fujita, and Licheng Sun introduce the Special Issue of ChemSusChem on "Artificial Photosynthesis for Sustainable Fuels". They discuss the need for non-fossil based fuels, introduce both biological and artificial photosynthesis, and outline various important concepts in artificial photosynthesis, including molecular and solid-state catalysts for water oxidation and hydrogen evolution, catalytic CO2 reduction, and photoelectrochemical systems.


Carbon-doped SnS2 nanostructure as a high-efficiency solar fuel catalyst under visible light.

Photocatalytic formation of hydrocarbons using solar energy via artificial photosynthesis is a highly desirable renewable-energy source for replacing conventional fossil fuels. Using an L-cysteine-based hydrothermal process, here we synthesize a carbon-doped SnS2 (SnS2-C) metal dichalcogenide nanostructure, which exhibits a highly active and selective photocatalytic conversion of CO2 to hydrocarbons under visible-light. The interstitial carbon doping induced microstrain in the SnS2 lattice, resulting in di...

A photochemical diode artificial photosynthesis system for unassisted high efficiency overall pure water splitting.

The conversion of solar energy into chemical fuels can potentially address many of the energy and environment related challenges we face today. In this study, we have demonstrated a photochemical diode artificial photosynthesis system that can enable efficient, unassisted overall pure water splitting without using any sacrificial reagent. By precisely controlling charge carrier flow at the nanoscale, the wafer-level photochemical diode arrays exhibited solar-to-hydrogen efficiency ~3.3% in neutral (pH ~...


Generating Electric Current by Bioartificial Photosynthesis.

Abundant solar energy can be a sustainable source of energy. This chapter highlights recent advancements, challenges, and future scenarios in bioartificial photosynthesis, which is a new subset of bioelectrochemical systems (BESs) and technologies. BES technologies exploit the catalytic interactions between biological moieties and electrodes. At the nexus of BES and photovoltaics, this review focuses on light-harvesting technologies based on bioartificial photosynthesis. Such technologies are promising beca...

Metal-free Fluorine Interlayer Doped Carbon Electrocatalyst for CO₂ Reduction Outcompeting Hydrogen Evolution.

Electrochemical carbon dioxide reduction (ECDRR), as a key reaction in artificial photosynthesis to implement renewable energy conversion/storage, has been inhibited by the low efficiency and high cost of electrocatalysts. Herein, we synthesize a fluorine interlayer doped carbon (FC) catalyst which enables the highly selective CO₂-to-CO conversion with enhanced partial current density of CO (ca. 250,000 times) and suppressed H₂ (ca. 1/5) on FC than pristine carbon. Concluded from experimental analysis a...

Unique Features of the Photocatalytic Reduction of H2O and CO2 by New Catalysts Based on the Analogues of CdS, Cd4P2X3 (X= Cl, Br, I).

Photochemical reduction of H2O and CO2 has been investigated with a new family of catalysts of the formula Cd4P2X3 (X= Cl, Br, I), obtained by the complete aliovalent substitution of the sulfide ions in CdS by P and X (Cl, Br, I). Unlike CdS, the Cd4P2X3 compounds exhibit hydrogen evolution and CO2 reduction from water even in the absence of a sacrificial agent or a co-catalyst. Use of NixPy as the co-catalyst, enhances hydrogen evolution, reaching 3870( AQY= 4.11) and 9258 (AQY= 9.83) µmolh-1g-1 respectiv...

Measuring the dynamic photosynthome.

Photosynthesis underpins plant productivity and yet is notoriously sensitive to small changes in environmental conditions, meaning that quantitation in nature across different time scales is not straightforward. The 'dynamic' changes in photosynthesis (i.e. the kinetics of the various reactions of photosynthesis in response to environmental shifts) are now known to be important in driving crop yield.

Redox Active Ligand Assisted Multi-Electron Catalysis: A Case of CoIII Complex as Water Oxidation Catalyst.

Water oxidation is the key step in both natural and artificial photosynthesis to capture solar energy for fuel production. The design of highly efficient and stable molecular catalysts for water oxidation based on non-precious metals is still a great challenge. In this article, the electrocatalytic oxidation of water by Na[(L4-)CoIII], where L is substituted tetraamido macrocyclic ligand (TAML), have been investigated in aqueous solution (pH 7.0). We found that Na[(L4-)CoIII] is a stable and efficient homog...

Design of a Lightweight Soft Robotic Arm Using Pneumatic Artificial Muscles and Inflatable Sleeves.

As robots begin to interact with humans and operate in human environments, safety becomes a major concern. Conventional robots, although reliable and consistent, can cause injury to anyone within its range of motion. Soft robotics, wherein systems are made to be soft and mechanically compliant, are thus a promising alternative due to their lightweight nature and ability to cushion impacts, but current designs often sacrifice accuracy and usefulness for safety. We, therefore, have developed a bioinspired rob...

Industrial wastewater advanced treatment via catalytic ozonation with an Fe-based catalyst.

An Fe-based catalyst was used as a heterogeneous catalyst for the ozonation of industrial wastewater, and key operational parameters (pH and catalyst dosage) were studied. The results indicated that the Fe-based catalyst significantly improved the mineralization of organic pollutants in wastewater. TOC (total organic carbon) removal was high, at 78.7%, with a catalyst concentration of 200 g/L, but only 31.6% with ozonation alone. The Fe-based catalyst significantly promoted ozone decomposition by 70% in a...

Plasma-catalyst hybrid reactor with CeO2/γ-Al2O3 for benzene decomposition with synergetic effect and nano particle by-product reduction.

A dielectric barrier discharge (DBD) catalyst hybrid reactor with CeO2/γ-Al2O3 catalyst balls was investigated for benzene decomposition at atmospheric pressure and 30 °C. At an energy density of 37-40 J/L, benzene decomposition was as high as 92.5% when using the hybrid reactor with 5.0wt%CeO2/γ-Al2O3; while it was 10%-20% when using a normal DBD reactor without a catalyst. Benzene decomposition using the hybrid reactor was almost the same as that using an O3 catalyst reactor with the same CeO2/γ-A...

Development of a framework catalyst for photocatalytic hydrogen evolution.

The controlled self-assembly of a catalyst module composed of a Rh(ii) paddle-wheel dimer bearing 1,8-naphthalimide-based moieties afforded a novel heterogeneous framework catalyst (FC-1). The framework catalyst exhibited long-lived activity for photocatalytic hydrogen production from water and was easily reused without considerable loss of catalytic activity.

Sinter-resistant and highly active sub- 5 nm bimetallic Au-Cu nanoparticle catalyst encapsulated in silica for high-temperature carbon monoxide oxidation.

A novel gold-copper based silica encapsulated mixed metal oxide (MMO) core-shell catalyst - with sub 5-nm MMO particles - was successfully synthesized via a reverse micelle process. The SiO2 encapsulated MMO catalyst was reduced under hydrogen flow to produce Au-Cu@SiO2 catalyst. XRD and XPS characterization confirmed the presence of Au-Cu nanocomposites in the catalyst while TEM characterization revealed the core-shell structure of the catalyst with the presence of sub 5-nm Au-Cu nanoparticle cores inside ...

Pretreatment of Leucaena leucocephala wood by acidified glycerol: optimization, severity index and correlation analysis.

In this study, Leucaena leucocephala wood was pretreated with aqueous glycerol having HSO as the catalyst. Response surface methodology (RSM) and artificial neural network (ANN) were used to optimize the process parameters, catalyst concentration (1-3%), duration (120-300 min) and temperature (100-150 °C). ANN gave more accurate predictions for total reducing sugar yield than RSM. ANN also had lower values for error functions. Severity index (SI) was calculated based on the temperature, duration and ca...

The artificial humic substance HS1500 does not inhibit photosynthesis of the green alga Desmodesmus armatus in vivo but interacts with the photosynthetic apparatus of isolated spinach thylakoids in vitro.

Humic substances (HSs) can influence the growth and composition of freshwater phytoplankton assemblage. Since HSs contain many phenolic and quinonic moieties and cause growth reductions in eco-physiological field experiments, HSs are considered photosystem II herbicides. To test this specific mode of action in vivo and in vitro, respectively, we used intact cells of the green alga Desmodesmus armatus, as well as thylakoids isolated from spinach (Spinacia oleracea) as a model system for the green algal chlor...

C4-like Photosynthesis has Important Functions in C3 Plant Vasculature.

In C4 plants, the vascularization of the leaf is extended to include a ring of photosynthetic bundle sheath cells, which have essential and specific functions. In contrast to the substantial knowledge of photosynthesis in C4 plants, relatively little is known about photosynthesis in C3 plant veins, which differs substantially from that in C3 mesophyll cells. In this review we highlight the specific photosynthetic machinery present in C3 vascular cells that likely evolved prior to the divergence between C3 a...

Gordon Research Conference on photosynthesis: photosynthetic plasticity from the environment to synthetic systems.

Here, we provide a summary of the 2017 Gordon Research Conference on Photosynthesis: "Photosynthetic plasticity: from the environment to synthetic systems". This conference was held at the Grand Summit Resort Hotel at Sunday River, Newry, Maine, USA, from July 16 to 21, 2017. We have also included here a brief description of the Gordon Research Seminar (for students and post-docs) held during 2 days preceding this conference. Following the conclusion of the conference's scientific program, four young scien...

Journal of Artificial Organs 2017: the year in review : Journal of Artificial Organs Editorial Committee.

Artificial selection increased body weight but induced increase of runs of homozygosity in Hanwoo cattle.

Artificial selection has been demonstrated to have a rapid and significant effect on the phenotype and genome of an organism. However, most previous studies on artificial selection have focused solely on genomic sequences modified by artificial selection or genomic sequences associated with a specific trait. In this study, we generated whole genome sequencing data of 126 cattle under artificial selection, and 24,973,862 single nucleotide variants to investigate the relationship among artificial selection, g...

Modelling temporal variation of parameters used in two photosynthesis models: influence of fruit load and girdling on leaf photosynthesis in fruit-bearing branches of apple.

Several studies have found seasonal and temporal variability in leaf photosynthesis parameters in different crops. This variability depends upon the environment, the developmental stage of the plant and the presence or absence of sinks. Girdling involves the removal of the bark and phloem down to the youngest xylem all around the stem and prevents export of photoassimilates out of the stem. The load of developing fruits has often been reported to influence the individual net leaf photosynthesis rate (Pn) in...

Layer-by-Layer Assembly of Polyoxometalates for Photoelectrochemical (PEC) Water Splitting: Towards Modular PEC Devices.

Artificial photosynthesis is considered one of the most promising solutions to modern energy and environmental crises. Considering that it is enabled by multiple components through a series of photoelectrochemical processes, the key to successful development of a photosynthetic device depends not only on the development of novel individual components but also on the rational design of an integrated photosynthetic device assembled from them. However, most studies have been dedicated to the development of ind...

Changes in redox regulation during transition from C3 to single cell C4 photosynthesis in Bienertia sinuspersici.

Bienertia sinuspersici performs single cell C4 photosynthesis without Kranz anatomy. Peripheral and central cytoplasmic compartments in a single chlorenchyma cell act as mesophyll cells and bundle sheath cells. Development of this specialized mechanism is gradual during plant development. Young leaves perform C3 photosynthesis, while mature leaves have complete C4 cycle. The aim of this work was to investigate changes in redox regulation and antioxidant defence during transition from C3 to single cell C4 ph...

The Experimental Measurement of Local and Bulk Oxygen Transport Resistances in the Catalyst Layer of Proton Exchange Membrane Fuel Cells.

Remarkable progress has been made in reducing the cathodic Pt loading of PEMFCs, however, a huge performance loss appears at high current densities, indicating the existence of a large oxygen transport resistance associated with the ultralow Pt-loading catalyst layer. To reduce the Pt loading without sacrificing cell performance, it is essential to illuminate the oxygen transport mechanism in the catalyst layer. Towards this goal, an experimental approach to measure the oxygen transport resistance in cataly...

Microwave-assisted catalytic pyrolysis of moso bamboo for high syngas production.

Microwave-assisted pyrolysis of moso bamboo with the activated carbon-supported iron(III) ion catalyst was carried out with the aim of obtaining high quality and quantity syngas(H + CO). The effect of the catalyst on moso bomboo pyrolysis involving the temperature-rising characteristics, product distribution, tar conversion and gas compositions were investigated. The results indicated that the catalyst improved the microwave-absorption capability and increased the maximum reaction temperatures. The form...

Excellent activity and selectivity of one-pot synthesized Cu-SSZ-13 catalyst in the selective catalytic oxidation of ammonia to nitrogen.

One-pot synthesized Cu-SSZ-13 catalyst treated with dilute HNO3 achieved superior activity and selectivity in the selective catalytic oxidation (SCO) of NH3 to nitrogen, in comparison with other zeolite-based catalysts and most of metal-oxide catalysts. Furthermore, the catalyst showed the similar or even higher catalytic activity than the partial noble-metal catalysts, and meanwhile its N2 selectivity was superior to most noble-metal catalysts. The characterization results demonstrated that more Cu2+ ions ...


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