scholarly journals Sol−Gel Processing of Water‐Soluble Carbon Nitride Enables High‐Performance Photoanodes**

ChemSusChem ◽  
2021 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía Santos‐Gómez ◽  
Santiago García‐Granda ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Water Soluble ◽  
Gel Processing ◽  
Soluble Carbon

scholarly journals Sol–Gel Processing of Water‐Soluble Carbon Nitride Enables High‐Performance Photoanodes

ChemSusChem ◽  
2021 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía Santos‐Gómez ◽  
Santiago García‐Granda ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Water Soluble ◽  
Gel Processing ◽  
Soluble Carbon

scholarly journals Sol–Gel Processing of Water-Soluble Carbon Nitride Enables High-Performance Photoanodes

2020 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía dos Santos-Gómez ◽  
Santiago García-Granda ◽  
...  
Keyword(s):  
Soft Matter ◽  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Thin Layers ◽  
Water Soluble ◽  
New Paradigm ◽  
High Quality ◽  
Free Films ◽  
Gel Processing

In spite of the enormous promise that polymeric carbon nitride (PCN) materials hold for photoelectrochemical (PEC) applications, the fabrication of high-quality PCN photoelectrodes has been a largely elusive goal to date. Here we tackle this challenge by devising, for the first time, a sol–gel approach that enables facile preparation of photoanodes based on poly(heptazine imide) (PHI), a polymer belonging to the PCN family. The sol–gel process capitalizes on the use of a water-soluble PHI precursor composed of nanosized (~10 nm) particles that allows formation of a non-covalent hydrogel. The hydrogel can be deposited on a conductive substrate resulting in formation of mechanically stable porous polymeric thin layers (~400 nm), in contrast to the commonly obtained loosely attached thick particulate coatings. The resulting photoanodes exhibit unprecedented PEC performance in methanol reforming in neutral pH electrolytes with photocurrents of up to 177±27 mA cm<sup>-2</sup> (1 sun illumination) and 320±40 mA cm<sup>-2</sup> (2 sun illumination) at 1.23 V vs. RHE, maintaining such high photocurrents even down to ~0 V vs. RHE. These parameters permit effective operation even without any external electric bias, as demonstrated by bias-free photoreforming of methanol and glycerol, and highly selective (~100%) photooxidation of 4-methoxybenzyl alcohol (4-MBA). The robust binder-free films derived from sol–gel processing of water-soluble PCN thus represent a new paradigm for high-performance ‘soft-matter’ photoelectrocatalytic systems, and pave the way for further applications in which high-quality PCN films are required.

scholarly journals Sol–Gel Processing of Water-Soluble Carbon Nitride Enables High-Performance Photoanodes

2020 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía dos Santos-Gómez ◽  
Santiago García-Granda ◽  
...  
Keyword(s):  
Soft Matter ◽  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Thin Layers ◽  
Water Soluble ◽  
New Paradigm ◽  
High Quality ◽  
Binder Free ◽  
Gel Processing

In spite of the enormous promise that polymeric carbon nitride (PCN) materials hold for various applications, the fabrication of high-quality, binder-free PCN films and electrodes has been a largely elusive goal to date. Here we tackle this challenge by devising, for the first time, a sol–gel approach that enables facile preparation of thin films based on poly(heptazine imide) (PHI), a polymer belonging to the PCN family. The sol–gel process capitalizes on the use of a water-soluble PHI precursor that allows formation of a non-covalent hydrogel. The hydrogel can be deposited on conductive substrates resulting in formation of mechanically stable polymeric thin layers. The resulting photoanodes exhibit unprecedented PEC performance in alcohol reforming and selective (~100%) conversions with very high photocurrents down to ~0 V vs. RHE, which enables even effective operation under bias-free conditions. The robust binder-free films derived from sol–gel processing of water-soluble PCN thus represent a new paradigm for high-performance ‘soft-matter’ photoelectrocatalytic systems, and pave the way for further applications in which high-quality PCN films are required.

scholarly journals Sol–Gel Processing of Water-Soluble Carbon Nitride Enables High-Performance Photoanodes

2020 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía dos Santos-Gómez ◽  
Santiago García-Granda ◽  
...  
Keyword(s):  
Soft Matter ◽  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Thin Layers ◽  
Water Soluble ◽  
New Paradigm ◽  
High Quality ◽  
Binder Free ◽  
Gel Processing

In spite of the enormous promise that polymeric carbon nitride (PCN) materials hold for various applications, the fabrication of high-quality, binder-free PCN films and electrodes has been a largely elusive goal to date. Here we tackle this challenge by devising, for the first time, a sol–gel approach that enables facile preparation of thin films based on poly(heptazine imide) (PHI), a polymer belonging to the PCN family. The sol–gel process capitalizes on the use of a water-soluble PHI precursor that allows formation of a non-covalent hydrogel. The hydrogel can be deposited on conductive substrates resulting in formation of mechanically stable polymeric thin layers. The resulting photoanodes exhibit unprecedented PEC performance in alcohol reforming and selective (~100%) conversions with very high photocurrents down to ~0 V vs. RHE, which enables even effective operation under bias-free conditions. The robust binder-free films derived from sol–gel processing of water-soluble PCN thus represent a new paradigm for high-performance ‘soft-matter’ photoelectrocatalytic systems, and pave the way for further applications in which high-quality PCN films are required.

scholarly journals Sol–Gel Processing of Water-Soluble Carbon Nitride Enables High-Performance Photoanodes

2020 ◽  
Author(s):  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Lucía dos Santos-Gómez ◽  
Santiago García-Granda ◽  
...  
Keyword(s):  
Soft Matter ◽  
High Performance ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Thin Layers ◽  
Water Soluble ◽  
New Paradigm ◽  
Zero Bias ◽  
Gel Processing ◽  
Very High

In spite of the enormous promise that polymeric carbon nitride (PCN) materials hold for photoelectrochemical (PEC) applications, the fabrication of highly stable and photoactive PCN photoelectrodes has been a largely elusive goal to date. Here we tackle this challenge by devising, for the first time, a sol–gel approach that enables facile preparation of photoanodes based on poly(heptazine imide) (PHI), a polymer belonging to the PCN family. The sol–gel process capitalizes on the use of a water-soluble PHI precursor composed of nanosized (~10 nm) particles that allows formation of a non-covalent hydrogel. The hydrogel can be deposited on a conductive substrate resulting in formation of mechanically stable porous polymeric thin layers (~400 nm), in contrast to the commonly obtained loosely attached thick particulate coatings. The resulting photoanodes exhibit unprecedented PEC performance in methanol reforming in neutral pH electrolytes with very high photocurrents of 177±27 mA (1 sun illumination) cm<sup>-2</sup> and 320±40 mA cm<sup>-2</sup> (2 sun illumination) at 1.23 V vs. RHE, with very high photocurrents down to ~0 V vs. RHE. These parameters permit effective operation even without any external electric bias, as demonstrated by zero-bias photoreforming of methanol and glycerol, and highly selective (~100%) photooxidation of 4-methoxybenzyl alcohol (4-MBA). The robust binder-free films derived from sol–gel processing of water-soluble PCN thus represent a new paradigm for high-performance ‘soft-matter’ photoelectrocatalytic systems based on PCN.

scholarly journals Photodriven Charge Accumulation and Carrier Dynamics in a Water‐Soluble Carbon Nitride Photocatalyst

ChemSusChem ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1728-1736
Author(s):  
Chunyu Li ◽  
Elisabeth Hofmeister ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Christiane Adler ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Carrier Dynamics ◽  
Water Soluble ◽  
Charge Accumulation ◽  
Soluble Carbon

Features of silicon– and titanium–polyethylene glycol precursors in sol–gel synthesis of new hydrogels

2015 ◽  
Vol 3 (27) ◽  
pp. 5490-5500 ◽  
Author(s):  
T. G. Khonina ◽  
A. P. Safronov ◽  
M. V. Ivanenko ◽  
E. V. Shadrina ◽  
O. N. Chupakhin
Keyword(s):  
Polyethylene Glycol ◽  
Sol Gel ◽  
Water Soluble ◽  
Sol Gel Synthesis ◽  
Gel Processing

The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol–gel processing, was investigated.

Photo-induced sol–gel processing for low-temperature fabrication of high-performance silsesquioxane membranes for use in molecular separation

2015 ◽  
Vol 51 (49) ◽  
pp. 9932-9935 ◽  
Author(s):  
Mai Nishibayashi ◽  
Hiroyuki Yoshida ◽  
Masamoto Uenishi ◽  
Masakoto Kanezashi ◽  
Hiroki Nagasawa ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Sol Gel ◽  
Molecular Separation ◽  
Gel Processing

Silsesquioxane (SQ) membranes derived from 3-methacryloxypropyltrimethoxysilane and bis(trimethoxysilyl)ethane were successfully fabricated at low temperature via photo-induced sol–gel processing.

Tunable water-soluble carbon nitride by alkali-metal cations modification: Enhanced ROS-evolving and adsorption band for photodynamic therapy

2020 ◽  
Vol 269 ◽  
pp. 118848 ◽  
Author(s):  
Yizhang Wu ◽  
Dongxin Yang ◽  
Wei Xu ◽  
Renjie Song ◽  
Mengmeng Li ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Alkali Metal ◽  
Carbon Nitride ◽  
Metal Cations ◽  
Water Soluble ◽  
Alkali Metal Cations ◽  
Adsorption Band ◽  
Soluble Carbon

Chemical Synthesis of Fine Powders

MRS Bulletin ◽  
1990 ◽  
Vol 15 (1) ◽  
pp. 18-25 ◽  
Author(s):  
J. Livage ◽  
M. Henry ◽  
J.P. Jolivet ◽  
C. Sanchez
Keyword(s):  
High Performance ◽  
Colloidal Particles ◽  
Sol Gel ◽  
Solid Material ◽  
Narrow Particle Size Distribution ◽  
Molecular Precursors ◽  
Inorganic Oxides ◽  
Fine Powders ◽  
Sol Gel Process ◽  
Gel Processing

Interest in the synthesis of submicron monodispersed powders is increasing. Such powders find applications in the ceramic industry when high performance materials are required. Sintering time and temperature can be significantly reduced with powders of narrow particle-size distribution. Fine colloidal particles can be made by a variety of methods, from the vapor phase or the liquid phase.The sol gel process offers new approaches to the synthesis of fine powders. Starting from molecular precursors, such as metal alkoxides or aqueous solutions, an oxide network is obtained via inorganic polymerization reactions. These reactions occur in solution, and the term “sol-gel processing” is often used to describe the synthesis of inorganic oxides by wet chemical methods. It offers many advantages compared to the conventional powder route. One unique advantage is the ability to go all the way from the molecular precursor to the solid material, permitting better control of the entire process and allowing synthesis of “tailor-made” powders.

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