scholarly journals Recent Advances in the BiVO4 Photocatalyst for Sun-Driven Water Oxidation: Top-Performing Photoanodes and Scale-Up Challenges

Catalysts ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 13 ◽  
Author(s):  
Kristine Tolod ◽  
Simelys Hernández ◽  
Nunzio Russo
Keyword(s):  
Water Oxidation ◽  
Scale Up ◽  
Recent Advances

Recent Advances in Catalysts Based on Molecular Cubanes for Visible Light-Driven Water Oxidation

2020 ◽  
Vol 36 (3) ◽  
pp. 1905025-0 ◽  
Author(s):  
Wanjun Sun ◽  
◽  
Junqi Lin ◽  
Xiangming Liang ◽  
Junyi Yang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Recent Advances ◽  
Visible Light Driven

scholarly journals Polynuclear Cobalt Complexes as Catalysts for Light-Driven Water Oxidation: A Review of Recent Advances

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 602 ◽  
Author(s):  
Dmytro Nesterov ◽  
Oksana Nesterova
Keyword(s):  
Water Oxidation ◽  
Catalytic Efficiency ◽  
Cobalt Complexes ◽  
Platinum Group Metal ◽  
Experimental Methods ◽  
Cobalt Ions ◽  
Recent Advances ◽  
Wide Range ◽  
Artificial Photosynthetic ◽  
Molecular Catalysts

Photochemical water oxidation, as a half-reaction of water splitting, represents a great challenge towards the construction of artificial photosynthetic systems. Complexes of first-row transition metals have attracted great attention in the last decade due to their pronounced catalytic efficiency in water oxidation, comparable to that exhibited by classical platinum-group metal complexes. Cobalt, being an abundant and relatively cheap metal, has rich coordination chemistry allowing construction of a wide range of polynuclear architectures for the catalytic purposes. This review covers recent advances in application of cobalt complexes as (pre)catalysts for water oxidation in the model catalytic system comprising [Ru(bpy)3]2+ as a photosensitizer and S2O82− as a sacrificial electron acceptor. The catalytic parameters are summarized and discussed in view of the structures of the catalysts. Special attention is paid to the degradation of molecular catalysts under catalytic conditions and the experimental methods and techniques used to control their degradation as well as the leaching of cobalt ions.

scholarly journals Fiber Generators in Needleless Electrospinning

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Haitao Niu ◽  
Tong Lin
Keyword(s):  
Production Rate ◽  
Scale Up ◽  
Electrospun Nanofibers ◽  
Scaling Up ◽  
Electrospinning Process ◽  
Recent Advances ◽  
Needleless Electrospinning ◽  
Application Potential

The conventional electrospinning often uses a needle-like nozzle to produce nanofibers with a very low production rate. Despite the enormous application potential, needle electrospun nanofibers meet difficulties in broad applications in practice, due to the lack of an economic and efficient way to scale up the electrospinning process. Recently, needleless electrospinning has emerged as a new electrospinning mode and shown ability to produce nanofibers on large-scales. It has been established that the fiber generator, also referred to as “spinneret” in this paper, in needleless electrospinning plays a key role in scaling up the nanofiber production. This paper summarizes the recent advances in the development of needleless spinnerets and their influences on electrospinning process, nanofiber quality, and productivity.

Recent advances in the application of phosphates and borates as electrocatalysts for water oxidation

2020 ◽  
Vol 12 ◽  
pp. 100095
Author(s):  
Y. Meng ◽  
G. Ni ◽  
X. Jin ◽  
J. Peng ◽  
Q.Y. Yan
Keyword(s):  
Water Oxidation ◽  
Recent Advances

scholarly journals Simulation for Supporting Scale-Up of a Fluidized Bed Reactor for Advanced Water Oxidation

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Farhana Tisa ◽  
Abdul Aziz Abdul Raman ◽  
Wan Mohd Ashri Wan Daud
Keyword(s):  
Fluidized Bed ◽  
Water Oxidation ◽  
Fenton Reaction ◽  
Advanced Oxidation Process ◽  
Scale Up ◽  
Fluidized Bed Reactor ◽  
Hydrodynamic Characteristics ◽  
Kinetic Information ◽  
Working Volume ◽  
Continuous Equation

Simulation of fluidized bed reactor (FBR) was accomplished for treating wastewater using Fenton reaction, which is an advanced oxidation process (AOP). The simulation was performed to determine characteristics of FBR performance, concentration profile of the contaminants, and various prominent hydrodynamic properties (e.g., Reynolds number, velocity, and pressure) in the reactor. Simulation was implemented for 2.8 L working volume using hydrodynamic correlations, continuous equation, and simplified kinetic information for phenols degradation as a model. The simulation shows that, by using Fe3+and Fe2+mixtures as catalyst, TOC degradation up to 45% was achieved for contaminant range of 40–90 mg/L within 60 min. The concentration profiles and hydrodynamic characteristics were also generated. A subsequent scale-up study was also conducted using similitude method. The analysis shows that up to 10 L working volume, the models developed are applicable. The study proves that, using appropriate modeling and simulation, data can be predicted for designing and operating FBR for wastewater treatment.

Application of microwave-assisted heterogeneous catalysis in sustainable synthesis design

2017 ◽  
Vol 19 (16) ◽  
pp. 3729-3751 ◽  
Author(s):  
Anne Kokel ◽  
Christian Schäfer ◽  
Béla Török
Keyword(s):  
Energy Efficiency ◽  
Heterogeneous Catalysis ◽  
Scale Up ◽  
Catalytic Synthesis ◽  
Microwave Assisted Synthesis ◽  
Heterogeneous Catalytic ◽  
Microwave Assisted ◽  
Synthesis Design ◽  
Recent Advances

Recent advances in the application of microwave-assisted heterogeneous catalytic synthesis approaches are reviewed with additional inputs on the energy efficiency and scale-up of microwave-assisted synthesis.

scholarly journals Recent Advances in TiO2-Based Heterojunctions for Photocatalytic CO2 Reduction With Water Oxidation: A Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Kai Li ◽  
Chao Teng ◽  
Shuang Wang ◽  
Qianhao Min
Keyword(s):  
Water Oxidation ◽  
Rational Design ◽  
Photocatalytic Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Spectral Response ◽  
Co2 Reduction ◽  
Environmental Crisis ◽  
Ultraviolet Region ◽  
Recent Advances

Photocatalytic conversion of CO2 into solar fuels has gained increasing attention due to its great potential for alleviating the energy and environmental crisis at the same time. The low-cost TiO2 with suitable band structure and high resistibility to light corrosion has proven to be very promising for photoreduction of CO2 using water as the source of electrons and protons. However, the narrow spectral response range (ultraviolet region only) as well as the rapid recombination of photo-induced electron-hole pairs within pristine TiO2 results in the low utilization of solar energy and limited photocatalytic efficiency. Besides, its low selectivity toward photoreduction products of CO2 should also be improved. Combination of TiO2 with other photoelectric active materials, such as metal oxide/sulfide semiconductors, metal nanoparticles and carbon-based nanostructures, for the construction of well-defined heterostructures can enhance the quantum efficiency significantly by promoting visible light adsorption, facilitating charge transfer and suppressing the recombination of charge carriers, resulting in the enhanced photocatalytic performance of the composite photocatalytic system. In addition, the adsorption and activation of CO2 on these heterojunctions are also promoted, therefore enhancing the turnover frequency (TOF) of CO2 molecules, so as to the improved selectivity of photoreduction products. This review focus on the recent advances of photocatalytic CO2 reduction via TiO2-based heterojunctions with water oxidation. The rational design, fabrication, photocatalytic performance and CO2 photoreduction mechanisms of typical TiO2-based heterojunctions, including semiconductor-semiconductor (S-S), semiconductor-metal (S-M), semiconductor-carbon group (S-C) and multicomponent heterojunction are reviewed and discussed. Moreover, the TiO2-based phase heterojunction and facet heterojunction are also summarized and analyzed. In the end, the current challenges and future prospects of the TiO2-based heterostructures for photoreduction of CO2 with high efficiency, even for practical application are discussed.

scholarly journals Cell-free protein synthesis: advances on production process for biopharmaceuticals and immunobiological products

BioTechniques ◽  
2021 ◽  
Vol 70 (2) ◽  
pp. 126-133
Author(s):  
Camila Hiromi Chiba ◽  
Marcos Camargo Knirsch ◽  
Adriano Rodrigues Azzoni ◽  
Antonio R Moreira ◽  
Marco Antonio Stephano
Keyword(s):  
Protein Synthesis ◽  
Production Process ◽  
Scale Up ◽  
Pharmaceutical Market ◽  
Free Protein ◽  
Recent Advances ◽  
Scale Down ◽  
Key Aspects ◽  
Cell Free Protein Synthesis

Biopharmaceutical products are of great importance in the treatment or prevention of many diseases and represent a growing share of the global pharmaceutical market. The usual technology for protein synthesis (cell-based expression) faces certain obstacles, especially with ‘difficult-to-express’ proteins. Cell-free protein synthesis (CFPS) can overcome the main bottlenecks of cell-based expression. This review aims to present recent advances in the production process of biologic products by CFPS. First, key aspects of CFPS systems are summarized. A description of several biologic products that have been successfully produced using the CFPS system is provided. Finally, the CFPS system's ability to scale up and scale down, its main limitations and its application for biologics production are discussed.

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