scholarly journals Back Cover: Enhancing the Performance of a Robust Sol-Gel-Processed p-Type Delafossite CuFeO2Photocathode for Solar Water Reduction (ChemSusChem 8/2015)

ChemSusChem ◽  
2015 ◽  
Vol 8 (8) ◽  
pp. 1494-1494
Author(s):  
Mathieu S. Prévot ◽  
Néstor Guijarro ◽  
Kevin Sivula
Keyword(s):  
Sol Gel ◽  
Solar Water ◽  
Back Cover ◽  
Water Reduction ◽  
P Type

Enhancing the Performance of a Robust Sol-Gel-Processed p-Type Delafossite CuFeO2Photocathode for Solar Water Reduction

ChemSusChem ◽  
2015 ◽  
Vol 8 (8) ◽  
pp. 1359-1367 ◽  
Author(s):  
Mathieu S. Prévot ◽  
Néstor Guijarro ◽  
Kevin Sivula
Keyword(s):  
Sol Gel ◽  
Solar Water ◽  
Water Reduction ◽  
P Type

Improving charge collection with delafossite photocathodes: a host–guest CuAlO2/CuFeO2 approach

2016 ◽  
Vol 4 (8) ◽  
pp. 3018-3026 ◽  
Author(s):  
Mathieu S. Prévot ◽  
Yang Li ◽  
Néstor Guijarro ◽  
Kevin Sivula
Keyword(s):  
Charge Collection ◽  
Promising Candidate ◽  
Solar Water ◽  
Water Reduction ◽  
Alkaline Conditions ◽  
P Type

p-Type delafossite CuFeO2 has recently been reported as a promising candidate for direct photoelectrochemical solar water reduction in alkaline conditions.

scholarly journals Decoration of CuO NWs Gas Sensor with ZnO NPs for Improving NO2 Sensing Characteristics

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2103 ◽  
Author(s):  
Tae-Hee Han ◽  
So-Young Bak ◽  
Sangwoo Kim ◽  
Se Hyeong Lee ◽  
Ye-Ji Han ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Sol Gel ◽  
Oxide Semiconductor ◽  
Zno Nps ◽  
X Ray ◽  
Semiconductor Gas Sensor ◽  
Initial Resistance ◽  
P Type ◽  
Sensing Characteristics

This paper introduces a method for improving the sensitivity to NO2 gas of a p-type metal oxide semiconductor gas sensor. The gas sensor was fabricated using CuO nanowires (NWs) grown through thermal oxidation and decorated with ZnO nanoparticles (NPs) using a sol-gel method. The CuO gas sensor with a ZnO heterojunction exhibited better sensitivity to NO2 gas than the pristine CuO gas sensor. The heterojunction in CuO/ZnO gas sensors caused a decrease in the width of the hole accumulation layer (HAL) and an increase in the initial resistance. The possibility to influence the width of the HAL helped improve the NO2 sensing characteristics of the gas sensor. The growth morphology, atomic composition, and crystal structure of the gas sensors were analyzed using field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy, and X-ray diffraction, respectively.

Effect of aging heat time and annealing temperature on the properties of nanocrystalline tin dioxide thin films

2017 ◽  
Vol 31 (12) ◽  
pp. 1750114
Author(s):  
Imad H. Kadhim ◽  
H. Abu Hassan
Keyword(s):  
Thin Films ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Stable Solution ◽  
Solution Viscosity ◽  
Pure Ethanol ◽  
Rutile Structure ◽  
Heat Time ◽  
Chloride Dihydrate ◽  
P Type

Nanocrystalline tin dioxide (SnO2) thin films have been successfully prepared by sol–gel spin-coating technique on p-type Si (100) substrates. A stable solution was prepared by mixing tin(II) chloride dihydrate, pure ethanol, and glycerin. Temperature affects the properties of SnO2 thin films, particularly the crystallite size where the crystallization of SnO2 with tetragonal rutile structure is achieved when thin films that prepared under different aging heat times are annealed at 400[Formula: see text]C. By increasing aging heat time in the presence of annealing temperatures the FESEM images indicated that the thickness of the fabricated film was directly proportional to solution viscosity, increasing from approximately 380 nm to 744 nm, as well as the crystallization of the thin films improved and reduced defects.

Inside Back Cover: Insights into the Mechanism of Photocatalytic Water Reduction by DFT-Supported In Situ EPR/Raman Spectroscopy (Angew. Chem. Int. Ed. 43/2011)

2011 ◽  
Vol 50 (43) ◽  
pp. 10256-10256
Author(s):  
Dirk Hollmann ◽  
Felix Gärtner ◽  
Ralf Ludwig ◽  
Enrico Barsch ◽  
Henrik Junge ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Back Cover ◽  
Water Reduction

scholarly journals Electrochemical Study of Copper Ferrite as a Catalyst for CO2 Photoelectrochemical Reduction

2018 ◽  
Vol 13 (2) ◽  
pp. 236 ◽  
Author(s):  
Kaykobad Md. Rezaul Karim ◽  
Huei Ruey Ong ◽  
Hamidah Abdullah ◽  
Abu Yousuf ◽  
Chin Kui Cheng ◽  
...  
Keyword(s):  
Sol Gel ◽  
Co2 Reduction ◽  
Linear Sweep Voltammetry ◽  
Band Gap Energy ◽  
Reduction Reaction ◽  
Electrochemical Study ◽  
Flat Band ◽  
Copper Ferrite ◽  
Onset Potential ◽  
P Type

In this work, p-type CuFe2O4 was synthesized by sol gel method. The prepared CuFe2O4 was used as photocathode catalyst for photoelectrochemical (PEC) CO2 reduction. The XRD, UV-Visible Spectroscopy (UV-Vis), and Mott-Schottky (MS) experiments were done to characterize the catalyst. Linear sweep voltammetry (LSV) was employed to evaluate the visible light (λ>400 nm) effect of this catalyst for CO2 reduction.  The band gap energy of the catalyst was calculated from the UV-Vis and was found 1.30 eV. Flat band potential of the prepared CuFe2O4 was also calculated and found 0.27 V versus Ag/AgCl. Under light irradiation in the CO2-saturated NaHCO3 solution, a remarkable current development associated with CO2 reduction was found during LSV for the prepared electrode from onset potential -0.89 V with a peak current emerged at -1.01 V (vs Ag/AgCl) representing the occurrence of CO2 reduction reaction. In addition, the mechanism of PEC was proposed for the photocathode where the necessity of a bias potential in the range of 0.27 to ~ -1.0 V vs Ag/AgCl was identified which could effectively inhibit the electron-hole (e-/h+) recombination process leading to an enhancement of CO2 reduction reactions. Copyright © 2018 BCREC Group. All rights reservedReceived: 4th July 2017; Revised: 5th November 2017; Accepted: 15th November 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Karim, K.M.R., Ong, H.R., Abdullah, H., Yousuf, A., Cheng, C.K., Khan, M.K.R. (2018). Electrochemical Study of Copper Ferrite as a Catalyst for CO2 Photoelectrochemical Reduction. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 236-244 (doi:10.9767/bcrec.13.2.1317.236-244) 

Solar-Water-Splitting BiVO4 Thin-Film Photoanodes Prepared By Using a Sol-Gel Dip-Coating Technique

ChemPhotoChem ◽  
2017 ◽  
Vol 1 (6) ◽  
pp. 273-280 ◽  
Author(s):  
Samantha Hilliard ◽  
Dennis Friedrich ◽  
Stéphane Kressman ◽  
Henri Strub ◽  
Vincent Artero ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Splitting ◽  
Sol Gel ◽  
Dip Coating ◽  
Solar Water ◽  
Coating Technique ◽  
Solar Water Splitting ◽  
Dip Coating Technique

Donor-acceptor copolymers and sol-gel processable zinc oxide for thin film transistors and hybrid photodetectors

2019 ◽  
Author(s):  
◽  
Alec Pickett
Keyword(s):  
Organic Semiconductors ◽  
Field Effect Transistors ◽  
Sol Gel ◽  
Phenyl Group ◽  
Grazing Incidence ◽  
Second Phase ◽  
Commercial Development ◽  
University Of Missouri ◽  
Pi Conjugated ◽  
P Type

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Organic semiconductors have been gaining attention both in research and commercial development for electronic devices due to their low manufacturing and processing costs. Copolymers based on diketopyrrolopyrrole (DPP) cores have attracted a lot of attention due to their high p-type as well as n-type carrier mobilities in organic field-effect transistors (FETs) and high power conversion efficiencies in solar cell structures. Hybrid organic-inorganic photodiode interfaces have also gained significant interest due to the realization of intrinsic p-n junctions as well as their unique physical properties such as mechanical flexibility and high photosensitivity. ZnO is an intrinsic n-type semiconductor which is non-toxic and sol-gel processable, creating avenues for film patterning and fully solution processed devices. In this work, we report the structural and charge transport properties of n-dialkyl side-chain substituted thiophene DPP end-capped with a phenyl group (Ph-TDPP-Ph) monomer in FETs which were fabricated by vacuum deposition and solvent casting. From grazing incidence X-ray diffraction (GIXRD), Ph-TDPP-Ph reveals polymorphic structure with [pi]-conjugated stacking direction oriented in-plane. The unit cell comprises either one monomer for one phase (TR1), or two monomers for the second phase (TR2). The TR2 phase thus signals a shift from a coplanar to herringbone orientation of the molecules. The device performance is sensitive to the ratio of the two triclinic phases found in the film. Some of the best FET performances with p-type carrier mobilities of 0.1 cm2/Vs and on/off ratio of 10[superscript 6] are for films that comprise mainly the TR1 phase.

A oxygen vacancy-modulated homojunction structural CuBi2O4 photocathodes for efficient solar water reduction

Nanoscale ◽  
2020 ◽  
Vol 12 (28) ◽  
pp. 15193-15200 ◽  
Author(s):  
Shenqi Wei ◽  
Chenglong Wang ◽  
Xuefeng Long ◽  
Tong Wang ◽  
Peng Wang ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Hydrogen Evolution ◽  
Solar Water ◽  
Water Reduction ◽  
Hydrogen Evolution Reactions

In this work, we propose a regrowth strategy to prepare a photocathode with CuBi2O4 coating on Zn-doped CuBi2O4, followed by oxygen vacancy modulation to facilitate interfacial hydrogen evolution reactions.

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