g-C3N4/Ca2Fe2O5 heterostructures for enhanced photocatalytic degradation of organic effluents under sunlight

Abstractg-C3N4/Ca2Fe2O5 heterostructures were successfully prepared by incorporating g-C3N4 into Ca2Fe2O5 (CFO). As prepared g-C3N4/CFO heterostructures were initially utilized to photodegrade organic effluent Methylene blue (MB) for optimization of photodegradation performance. 50% g-C3N4 content in CFO composition showed an enhanced photodegradation efficiency (~ 96%) over g-C3N4 (48.15%) and CFO (81.9%) due to mitigation of recombination of photogenerated charge carriers by Type-II heterojunction. The optimized composition of heterostructure was further tested for degradation of Bisphenol-A (BPA) under direct sunlight, exhibiting enhanced photodegradation efficiency of about 63.1% over g-C3N4 (17%) and CFO (45.1%). The photoelectrochemical studies at various potentials with and without light illumination showed significant improvement in photocurrent response for g-C3N4/Ca2Fe2O5 heterostructures (~ 1.9 mA) over CFO (~ 67.4 μA). These studies revealed efficient solar energy harvesting ability of g-C3N4/Ca2Fe2O5 heterostructures to be utilized for organic effluent treatment.

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Effect of Illumination on Organic Polymer Thin-Film Transistors

MRS Proceedings ◽

10.1557/proc-771-l10.17 ◽

2003 ◽

Vol 771 ◽

Cited By ~ 3

Author(s):

Michael C. Hamilton ◽

Sandrine Martin ◽

Jerzy Kanicki

Keyword(s):

Thin Film ◽

Thin Film Transistors ◽

Drain Current ◽

Charge Carriers ◽

Electrical Performance ◽

Organic Polymer ◽

Light Illumination ◽

Polymer Thin Film ◽

Channel Region ◽

White Light Illumination

AbstractWe have investigated the effects of white-light illumination on the electrical performance of organic polymer thin-film transistors (OP-TFTs). The OFF-state drain current is significantly increased, while the drain current in the strong accumulation regime is relatively unaffected. At the same time, the threshold voltage is decreased and the subthreshold slope is increased, while the field-effect mobility of the charge carriers is not affected. The observed effects are explained in terms of the photogeneration of free charge carriers in the channel region due to the absorbed photons.

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Highly Porous and Ultra-Lightweight Aero-Ga2O3: Enhancement of Photocatalytic Activity by Noble Metals

Materials ◽

10.3390/ma14081985 ◽

2021 ◽

Vol 14 (8) ◽

pp. 1985

Author(s):

Irina Plesco ◽

Vladimir Ciobanu ◽

Tudor Braniste ◽

Veaceslav Ursaki ◽

Florian Rasch ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Noble Metals ◽

Hybrid Structures ◽

Blue Dye ◽

Light Illumination ◽

Methylene Blue Dye ◽

Visible Light Illumination ◽

New Type ◽

Highly Porous

A new type of photocatalyst is proposed on the basis of aero-β-Ga2O3, which is a material constructed from a network of interconnected tetrapods with arms in the form of microtubes with nanometric walls. The aero-Ga2O3 material is obtained by annealing of aero-GaN fabricated by epitaxial growth on ZnO microtetrapods. The hybrid structures composed of aero-Ga2O3 functionalized with Au or Pt nanodots were tested for the photocatalytic degradation of methylene blue dye under UV or visible light illumination. The functionalization of aero-Ga2O3 with noble metals results in the enhancement of the photocatalytic performances of bare material, reaching the performances inherent to ZnO while gaining the advantage of the increased chemical stability. The mechanisms of enhancement of the photocatalytic properties by activating aero-Ga2O3 with noble metals are discussed to elucidate their potential for environmental applications.

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Electrochemical preparation of vertically aligned, hollow CdSe nanotubes and their p–n junction hybrids with electrodeposited Cu2O

Nanoscale ◽

10.1039/c3nr06917f ◽

2014 ◽

Vol 6 (15) ◽

pp. 9148-9156 ◽

Cited By ~ 6

Author(s):

Joyashish Debgupta ◽

Ramireddy Devarapalli ◽

Shakeelur Rahman ◽

Manjusha V. Shelke ◽

Vijayamohanan K. Pillai

Keyword(s):

Charge Carriers ◽

Type Ii ◽

Electrochemical Preparation ◽

Enhanced Absorption ◽

Absorption Of Light ◽

Vertically Aligned ◽

P Type

Heterojunction (type II) of self standing, vertically aligned CdSe NTs (n-type) with electrodeposited Cu2O (p-type) exhibits excellent photoresponse, resulting from enhanced absorption of light and faster transport of photogenerated charge carriers by CdSe NTs.

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Potential of Scenedesmus-fabricated ZnO nanorods in photocatalytic reduction of methylene blue under direct sunlight: kinetics and mechanism

Environmental Science and Pollution Research ◽

10.1007/s11356-021-12682-7 ◽

2021 ◽

Author(s):

Abhijeet Mahana ◽

Surya Kant Mehta

Keyword(s):

Methylene Blue ◽

Zno Nanorods ◽

Kinetics And Mechanism ◽

Photocatalytic Reduction ◽

Direct Sunlight

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SIn2Te/TeIn2Se: a type-II heterojunction as water-splitting photocatalyst with high solar energy harvesting

Journal of Materials Chemistry C ◽

10.1039/d1tc01278a ◽

2021 ◽

Author(s):

Peishen Shang ◽

Chunxiao Zhang ◽

Mengshi Zhou ◽

Chaoyu He ◽

Tao Ouyang ◽

...

Keyword(s):

Energy Harvesting ◽

Solar Energy ◽

Water Splitting ◽

First Principles ◽

Type Ii ◽

Two Dimensional ◽

First Principles Calculations ◽

Solar Energy Harvesting ◽

Renewable Hydrogen

Searching for photocatalysts is crucial for the production of renewable hydrogen from water. Two-dimensional (2D) vdW heterojunctions show great potential. Using first- principles calculations within the HSE06 functional, we propose...

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Congenital Methemoglobinemia Type II-Clinical Improvement with Short-Term Methylene Blue Treatment

Pediatric Blood & Cancer ◽

10.1002/pbc.25791 ◽

2015 ◽

Vol 63 (3) ◽

pp. 558-560 ◽

Cited By ~ 10

Author(s):

Monica S. Cooper ◽

Melinda Randall ◽

Margaret Rowell ◽

Margaret Charlton ◽

Anthea Greenway ◽

...

Keyword(s):

Methylene Blue ◽

Clinical Improvement ◽

Type Ii ◽

Short Term

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Hollow BiVO4/Bi2S3 cruciate heterostructures with enhanced visible-light photoactivity

Catalysis Science & Technology ◽

10.1039/c8cy01899e ◽

2019 ◽

Vol 9 (1) ◽

pp. 182-187 ◽

Cited By ~ 7

Author(s):

Chen Zhuang ◽

Lanqin Tang ◽

Zhentao Yu ◽

Tianxiao Peng ◽

Yongcai Zhang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Anion Exchange ◽

Light Illumination ◽

Photocurrent Response ◽

Exchange Reactions ◽

Visible Light Illumination

Unique BiVO4/Bi2S3 cruciate hollow heterostructures are successfully constructed via anion exchange reactions using cruciate BiVO4 as templates and precursors. The hollow heterostructures exhibit excellent enhanced photocurrent response and photocatalytic activity for reduction of Cr6+ under visible-light illumination.

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Bleached Wood Supports for Floatable, Recyclable, and Efficient Three Dimensional Photocatalyst

Catalysts ◽

10.3390/catal9020115 ◽

2019 ◽

Vol 9 (2) ◽

pp. 115 ◽

Cited By ~ 1

Author(s):

Yuming He ◽

Huayang Li ◽

Xuelian Guo ◽

Rongbo Zheng

Keyword(s):

Methylene Blue ◽

Photocatalytic Degradation ◽

Three Dimensional ◽

Carbon Support ◽

Support Materials ◽

Lignin Removal ◽

Photodegradation Efficiency ◽

Uv Transmittance ◽

Nanoparticles Suspension ◽

Black Color

To suppress the agglomeration of a photocatalyst, facilitate its recovery, and avoid photolysis of dyes, various support materials such as ceramic, carbon, and polymer have been investigated. However, these support materials pose the following additional challenges: ceramic supports will settle down at the bottom of their container due to their high density, while the carbon support will absorb the UV-vis light for its black color. Herein, we propose a floatable, UV transmitting, mesoporous bleached wood with most lignin removal to support P25 nanoparticles (BP-wood) that can effectively, recyclable, three dimensional (3D) photocatalytic degrade dyes such as methylene blue (MB) under ambient sunlight. The BP-wood has the following advantages: (1) The delignification makes the BP-wood more porous to not only quickly transport MB solutions upstream to the top surface, but is also decorated with P25 nanoparticles on the cell wall to form a 3D photocatalyst. (2) The delignification endows the BP-wood with good UV transmittance to undergo 3D photocatalytic degradation under sunlight. (3) It can float on the surface of the MB solution to capture more sunlight to enhance the photodegradation efficiency by suppressing the photolysis of MB. (4) It has comparable or even better photocatalytic degradation of 40 mg/L and 60 mg/L MB than that of P25 nanoparticles suspension. (5) It is green, recyclable, and scalable.

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