scholarly journals Design of an artificial photosynthetic system for production of alcohols in high concentration from CO2

2016 ◽  
Vol 9 (1) ◽  
pp. 193-199 ◽  
Author(s):  
Meenesh R. Singh ◽  
Alexis T. Bell
Keyword(s):  
Liquid Fuel ◽  
Pure Liquid ◽  
High Concentration ◽  
Photosynthetic System ◽  
Artificial Photosynthetic ◽  
Natural Photosynthesis

The design for a novel artificial photosynthetic system is proposed that can be ten-fold more efficient than natural photosynthesis and produce almost pure liquid fuel.

An artificial photosynthetic system with CO2-reducing solar-to-fuel efficiency exceeding 20%

2020 ◽  
Vol 8 (35) ◽  
pp. 18310-18317 ◽  
Author(s):  
Yanjun Xiao ◽  
Yao Qian ◽  
Anqi Chen ◽  
Tian Qin ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Fuel Efficiency ◽  
Photosynthetic System ◽  
Artificial Photosynthetic ◽  
Renewable Hydrogen

Artificial photosynthetic systems store solar energy in chemical fuels via CO2 reduction or renewable hydrogen evolution from water splitting.

Nucleation and Growth of Bubble With the Effects of Solute Gas

Volume 3 ◽  
2004 ◽  
Author(s):  
Shin-Ichi Tsuda ◽  
Shu Takagi ◽  
Yoichiro Matsumoto
Keyword(s):  
Saturation Pressure ◽  
Pressure Change ◽  
Nucleation And Growth ◽  
Bubble Nucleation ◽  
Dynamics Simulation ◽  
Pure Liquid ◽  
Dissolved Gas ◽  
High Concentration ◽  
Wrong Prediction ◽  
Solvent Molecules

Bubble nucleation and growth of formed nuclei are investigated by molecular dynamics simulation in Lennard-Jones liquid with gas impurities. For the onset of nucleation from bulk, it has been found that a dissolved gas whose interaction is very weak and whose diameter is larger than that of solvent molecules makes the action to cause composition fluctuation or local phase separation so strong that the nucleation probability predicted from pressure change becomes qualitatively wrong. It has been confirmed that this wrong prediction is generally explained by introducing the superheat ratio nondimensionalized by saturation pressure and spinodal pressure. For the growth stage of formed bubble nuclei, it is observed that the coalescence of nuclei occurs when a weak-interaction gas is dissolved at a high concentration while the competition between neighbor nuclei is dominant in the case of pure liquid.

scholarly journals A molecular tandem cell for efficient solar water splitting

2020 ◽  
Vol 117 (24) ◽  
pp. 13256-13260 ◽  
Author(s):  
Degao Wang ◽  
Jun Hu ◽  
Benjamin D. Sherman ◽  
Matthew V. Sheridan ◽  
Liang Yan ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Photoelectrochemical Cell ◽  
Applied Bias ◽  
Tandem Cell ◽  
Solar Water Splitting ◽  
Dye Sensitized ◽  
Solar Conversion ◽  
Artificial Photosynthetic ◽  
Natural Photosynthesis

Artificial photosynthesis provides a way to store solar energy in chemical bonds. Achieving water splitting without an applied external potential bias provides the key to artificial photosynthetic devices. We describe here a tandem photoelectrochemical cell design that combines a dye-sensitized photoelectrosynthesis cell (DSPEC) and an organic solar cell (OSC) in a photoanode for water oxidation. When combined with a Pt electrode for H2evolution, the electrode becomes part of a combined electrochemical cell for water splitting, 2H2O → O2+ 2H2, by increasing the voltage of the photoanode sufficiently to drive bias-free reduction of H+to H2. The combined electrode gave a 1.5% solar conversion efficiency for water splitting with no external applied bias, providing a mimic for the tandem cell configuration of PSII in natural photosynthesis. The electrode provided sustained water splitting in the molecular photoelectrode with sustained photocurrent densities of 1.24 mA/cm2for 1 h under 1-sun illumination with no applied bias.

scholarly journals Porphyrinoid–Fullerene Hybrids as Candidates in Artificial Photosynthetic Schemes

2019 ◽  
Vol 5 (3) ◽  
pp. 57 ◽  
Author(s):  
Vasilis Nikolaou ◽  
Asterios Charisiadis ◽  
Christina Stangel ◽  
Georgios Charalambidis ◽  
Athanassios G. Coutsolelos
Keyword(s):  
Scientific Community ◽  
Light Harvesting ◽  
Reorganization Energy ◽  
Photosynthetic Reaction Center ◽  
Comprehensive Analysis ◽  
The Novel ◽  
Reduction Potentials ◽  
Donor Acceptor ◽  
Artificial Photosynthetic ◽  
Natural Photosynthesis

Natural photosynthesis inspired the scientific community to design and synthesize molecular assemblies that possess advanced light-harvesting and electron-transfer features. In this review, we present the preparation and the photophysical investigation of novel porphyrin–fullerene hybrids acting as artificial photosynthetic systems. Porphyrinoids stand as chlorophyll analogues and have emerged as suitable photosensitizers in supramolecular electron donor–acceptor hybrids. Fullerenes (C60) are versatile electron acceptors with small reorganization energy and low reduction potentials. The novel derivatives presented herein mimic the fundamental features of the photosynthetic reaction center, namely, light harvesting, charge separation, and charge transport. To this end, a comprehensive analysis on these key processes that occur in various porphyrin–fullerene entities is illustrated in this work.

Photoinduced energy and charge transfer in a bis(triphenylamine)–BODIPY–C60 artificial photosynthetic system

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57293-57305 ◽  
Author(s):  
Jian-Yong Liu ◽  
Xue-Ni Hou ◽  
Ye Tian ◽  
Lizhi Jiang ◽  
Shuiquan Deng ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Steady State ◽  
Spectroscopic Techniques ◽  
Time Resolved ◽  
Photosynthetic System ◽  
Transfer Processes ◽  
Nonpolar Solvents ◽  
System P ◽  
Artificial Photosynthetic

The bis(triphenylamine)–BODIPY–C60 artificial photosynthetic system has been prepared and studied for its photoinduced transfer processes in polar and nonpolar solvents using various steady-state and time-resolved spectroscopic techniques.

scholarly journals Near infrared light-driven water oxidation in a molecule-based artificial photosynthetic device using an upconversion nano-photosensitizer

2015 ◽  
Vol 51 (65) ◽  
pp. 13008-13011 ◽  
Author(s):  
Xiaomin Liu ◽  
Hung-Cheng Chen ◽  
Xianggui Kong ◽  
Youlin Zhang ◽  
Langping Tu ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Near Infrared ◽  
Infrared Light ◽  
Upconversion Nanoparticles ◽  
Near Infrared Light ◽  
Photosynthetic System ◽  
Nir Light ◽  
Artificial Photosynthetic ◽  
Novel Concept

A NIR light driven nano-photosensitizer is reported as a novel concept in an artificial photosynthetic system that integrates upconversion nanoparticles with Pt(ii)-porphyrin.

scholarly journals An artificial photosynthetic system for photoaccumulation of two electrons on a fused dipyridophenazine (dppz)–pyridoquinolinone ligand

2018 ◽  
Vol 9 (17) ◽  
pp. 4152-4159 ◽  
Author(s):  
Jean-François Lefebvre ◽  
Julian Schindler ◽  
Philipp Traber ◽  
Ying Zhang ◽  
Stephan Kupfer ◽  
...  
Keyword(s):  
Ruthenium Complex ◽  
Photosynthetic System ◽  
Artificial Photosynthetic

The π-extended ligand of a ruthenium complex stores two photo-generated electrons, mimicking a key step in photosynthesis.

scholarly journals Hybrid Electrophototroph Enables High-Efficiency Carbon Dioxide Valorization to Fuel Molecules

2020 ◽  
Author(s):  
Zhaodong Li ◽  
Chao Wu ◽  
Xiang Gao ◽  
Bennett Addison ◽  
Xihan Chen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Higher Plants ◽  
Photosystems I And Ii ◽  
Model Fuel ◽  
In Series ◽  
Potential Benefits ◽  
Artificial Photosynthetic ◽  
Transfer Chain ◽  
Natural Photosynthesis ◽  
Photosynthetic Electron Transfer

Abstract Nature’s biocatalytic processes are driven by photosynthesis, whereby photosystems I and II are connected in series for light-stimulated generation of fuel products or electricity. Externally supplying electricity directly to the photosynthetic electron transfer chain (PETC) has numerous potential benefits, although strategies for achieving this goal have remained elusive. Here we report an integrated photo-electrochemical architecture which shuttles electrons directly to PETC in living cyanobacteria. The cathode of this architecture electrochemically interfaces with cyanobacterial cells lacking photosystem II activity that cannot perform photosynthesis independently. Illumination of the cathode channels electrons from external circuit to intracellular PETC through photosystem I, ultimately fueling CO2 conversion to acetate, a model fuel molecule with 9.32% energy efficiency, exceeding the efficiency of natural photosynthesis in higher plants (<1%) and cyanobacteria (~4-7%). The resulting “Electrophototrophic” bio-electrochemical hybrid has the potential to produce fuel chemicals with numerous advantages over standalone natural and artificial photosynthetic approaches.

scholarly journals Continuous production of pure liquid fuel solutions via electrocatalytic CO2 reduction using solid-electrolyte devices

Nature Energy ◽  
2019 ◽  
Vol 4 (9) ◽  
pp. 776-785 ◽  
Author(s):  
Chuan Xia ◽  
Peng Zhu ◽  
Qiu Jiang ◽  
Ying Pan ◽  
Wentao Liang ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Liquid Fuel ◽  
Continuous Production ◽  
Co2 Reduction ◽  
Pure Liquid

scholarly journals Aqueous dye-sensitized solar cells

2015 ◽  
Vol 44 (11) ◽  
pp. 3431-3473 ◽  
Author(s):  
Federico Bella ◽  
Claudio Gerbaldi ◽  
Claudia Barolo ◽  
Michael Grätzel
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Photosynthetic System ◽  
Dye Sensitized ◽  
Solvent Water ◽  
Artificial Photosynthetic ◽  
Sensitized Solar Cells

This review highlights the efforts towards the realization of an artificial photosynthetic system able to convert sunlight into electricity by using a unique solvent, water, the solvent of life.

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