Improvement of photocatalytic activity of surfactant modified In2O3 towards environmental remediation

2018 ◽  
Vol 42 (4) ◽  
pp. 2467-2475 ◽  
Author(s):  
Debasis Sariket ◽  
Sanjib Shyamal ◽  
Paramita Hajra ◽  
Harahari Mandal ◽  
Aparajita Bera ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Environmental Remediation ◽  
Surface Coverage ◽  
Catalytic Properties ◽  
Semiconductor Thin Films ◽  
Surfactant Modification

TX-100 surfactant modification of In2O3 semiconductor thin films with better surface coverage and crystallinity for photoelectrochemical applications with improved catalytic properties.

scholarly journals Optical, Electrical and Photocatalytic Properties of the Ternary SemiconductorsZnxCd1-xS,CuxCd1-xSandCuxZn1-xS

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Sandra Andrea Mayén-Hernández ◽  
David Santos-Cruz ◽  
Francisco de Moure-Flores ◽  
Sergio Alfonso Pérez-García ◽  
Liliana Licea-Jiménez ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Photocatalytic Properties ◽  
Energy Band Gap ◽  
Amorphous Thin Films ◽  
Semiconductor Thin Films ◽  
Different Temperatures ◽  
Blue Solution ◽  
Ternary Semiconductor ◽  
Van Der Pauw

The effects of vacuum annealing at different temperatures on the optical, electrical and photocatalytic properties of polycrystalline and amorphous thin films of the ternary semiconductor alloysZnxCd1-xS,CuxCd1-xSandCuxZn1-xSwere investigated in stacks of binary semiconductors obtained by chemical bath deposition. The electrical properties were measured at room temperature using a four-contact probe in the Van der Pauw configuration. The energy band gap of the films varied from 2.30 to 2.85 eV. The photocatalytic activity of the semiconductor thin films was evaluated by the degradation of an aqueous methylene blue solution. The thin film ofZnxCd1-xSannealed under vacuum at 300°C exhibited the highest photocatalytic activity.

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

Quantitative Image Analysis of Fractal-like Thin Films of Organic Semiconductors

2018 ◽  
Author(s):  
Weikun Zhu ◽  
Erfan Mohammadi ◽  
Ying Diao
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Image Analysis ◽  
Fractal Dimension ◽  
Organic Semiconductors ◽  
Film Growth ◽  
Electronic Device ◽  
Significant Control ◽  
Semiconductor Thin Films ◽  
Two Parameters

Morphology modulation offers significant control over organic electronic device performance. However, morphology quantification has been rarely carried out via image analysis. In this work, we designed a MATLAB program to evaluate two key parameters describing morphology of small molecule semiconductor thin films: fractal dimension and film coverage. We then employ this program in a case study of meniscus-guided coating of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C<sub>8</sub>-BTBT) under various conditions to analyze a diverse and complex morphology set. The evolution of morphology in terms of fractal dimension and film coverage was studied as a function of coating speed. We discovered that combined fractal dimension and film coverage can quantitatively capture the key characteristics of C<sub>8</sub>-BTBT thin film morphology; change of these two parameters further inform morphology transition. Furthermore, fractal dimension could potentially shed light on thin film growth mechanisms.

STRUCTURAL, OPTICAL PROPERTIES AND PHOTOCATALYTIC ACTIVITY OF NANOCRYSTALLINE TiO2 THIN FILMS DEPOSITED BY SOL-GEL SPIN COATING

2019 ◽  
Vol 7 (1) ◽  
pp. 28
Author(s):  
KOMARAIAH DURGAM ◽  
RADHA EPPA ◽  
REDDY M. V. RAMANA ◽  
KUMAR J. SIVA ◽  
R. SAYANNA ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Spin Coating ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2

Use of Nanopillars-TiO2 Thin Films in the Photocatalytic Degradation of Bromophenol Blue from Aqueous Solution

2018 ◽  
Vol 6 (1) ◽  
pp. 22-30
Author(s):  
C. Lalhriatpuia ◽  
◽  
Thanhming liana ◽  
K. Vanlaldinpuia
Keyword(s):  
Thin Films ◽  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Bromophenol Blue ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

The photocatalytic activity of Nanopillars-TiO2 thin films was assessed in the degradation of Bromophenol blue (BPB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the XRD, SEM and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data showed anatase phase of TiO2 particles with average particle size of 25.4 and 21.9 nm, for S1 and S2 catalysts respectively. The SEM and AFM images indicated the catalyst composed with Nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The average height of the pillars was found to be 180 and 40 nm respectively for the S1 and S2 catalyst. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of BPB using the UV light was studied at wide range of physico-chemical parametric studies to determine the mechanism of degradation as well as the practical applicability of the technique. The batch reactor operations were conducted at varied pH (pH 4.0 to 10.0), BPB initial concentration (1.0 to 20.0 mg/L) and presence of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of BPB. The maximum percent removal of BPB was observed at pH 6.0 and a low initial concentration of the pollutant highly favours the photocatalytic degradation using thin films. The presence of several interfering ions suppressed the photocatalytic activity of thin films to some extent. The time dependence photocatalytic degradation of BPB was demonstrated with the pseudo-first-order rate kinetics. Study was further extended with total organic carbon measurement using the TOC (Total Organic Carbon) analysis. This demonstrated an apparent mineralization of BPB from aqueous solutions.

Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films

2019 ◽  
Vol 19 (7) ◽  
pp. 3777-3784
Author(s):  
Jakub Rozbořil ◽  
Katharina Broch ◽  
Roland Resel ◽  
Ondřej Caha ◽  
Filip Münz ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecule ◽  
Organic Semiconductor ◽  
Annealing Behavior ◽  
Semiconductor Thin Films

scholarly journals Charge Trapping in Mixed Organic Donor-Acceptor Semiconductor Thin Films

2014 ◽  
Vol 26 (45) ◽  
pp. 7555-7560 ◽  
Author(s):  
Shota Nunomura ◽  
Xiaozhou Che ◽  
Stephen R. Forrest
Keyword(s):  
Thin Films ◽  
Charge Trapping ◽  
Semiconductor Thin Films ◽  
Donor Acceptor

Preparation, Characterization, and Photocatalytic Activity of Mesoporous TiO2 Thin Films

2013 ◽  
Vol 13 (2) ◽  
pp. 1493-1497 ◽  
Author(s):  
Jinshu Wang ◽  
Hui Li ◽  
Hongyi Li ◽  
Hong Wang ◽  
Qian Cai
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity

scholarly journals Memory Devices: Solution‐Processed Stretchable Ag 2 S Semiconductor Thin Films for Wearable Self‐Powered Nonvolatile Memory (Adv. Mater. 23/2021)

2021 ◽  
Vol 33 (23) ◽  
pp. 2170181
Author(s):  
Seungki Jo ◽  
Soyoung Cho ◽  
U Jeong Yang ◽  
Gyeong‐Seok Hwang ◽  
Seongheon Baek ◽  
...  
Keyword(s):  
Thin Films ◽  
Nonvolatile Memory ◽  
Memory Devices ◽  
Solution Processed ◽  
Semiconductor Thin Films ◽  
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