Nano-surface Monocrystalline BiVO4 Nanoplate Photoanode for Enhanced Photoelectrochemical Performance

2021 ◽  
Author(s):  
Bin Gao ◽  
Tao Wang ◽  
Hairong Xue ◽  
Cheng Jiang ◽  
Lei Sheng ◽  
...  
Keyword(s):  
Single Crystal ◽  
Low Cost ◽  
Photocurrent Density ◽  
Etching Process ◽  
Photoelectrochemical Performance ◽  
Surface Nanostructure

The single-crystal BiVO4 photoanode with surface nanostructure is prepared by a low-cost and simple etching process. As a result, the modified photoanode shows a higher photocurrent density and a lower...

Synthesis and Characterization of Mixed-Halide Inorganic-Organic Hybrid CH3NH3PbBr2.5Cl0.5 Perovskite for Photodetector Application

2021 ◽  
Vol 16 (5) ◽  
pp. 707-714
Author(s):  
Yan Chen ◽  
Siwen Tao ◽  
Yaqi Liu ◽  
Xuewei Fu ◽  
Mengyi Pei ◽  
...  
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Single Crystal ◽  
Bias Voltage ◽  
Metal Ion ◽  
Low Cost ◽  
Visible Region ◽  
High Sensitivity ◽  
Photocurrent Density ◽  
Organic Hybrid

Inorganic-organic hybrid perovskite (ABX3, A = organic cation, B = metal ion, X = halogen anion) combines the advantages of inorganic and organic materials. However, the properties and performance of mixed-halide CH3NH3PbBr2.5Cl0.5 (MAPbBr2.5Cl0.5) are still poorly understood. In this study, we synthetized MAPbBr2.5Cl0.5 single crystal and studied its structure, optical, thermal stability properties and optoelectronics applications for photodetector device. Compared with those of MAPbCl3, the interplanar distance of (100) crystal plane for MAPbBr2.5Cl0.5 becomes larger and the absorption spectrum of MAPbBr2.5Cl0.5 is extended to the visible region. The band gap of the MAPbBr2.5Cl0.5 single crystal is 2.28 eV. We find the device based on MAPbBr2.5Cl0.5 has high selectivity from 369 to 564 nm. The maximum ▴J (Jon– Joff) under 3.0 V bias voltage is about 1.2 µAcmr-2 at 454 nm visible light with 1 W mr-2 light intensity (1/1000 of the standard sunlight intensity), which proves the device has a high sensitivity. The linear relationship is established between the value of ▴J and light intensity and bias voltage. The fast current intensity transients (Fit) shows that the disappearance period of photocurrent density is 0.3 ms, which indicates the device is rapidly responsive photodetector. The highest value (1.7%) of external quantum efficiency (EQE) and the highest value of detectivities (D) both appear at 480 nm visible light at 4.0 V bias voltage when the irradiation power is 30 W m-2. Therefore, this simple and low-cost photoresponsive device is promising for industrial production of photodetector and photocatalysts device in the future.

scholarly journals TiO2-HfN Radial Nano-Heterojunction: A Hot Carrier Photoanode for Sunlight-Driven Water-Splitting

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1374
Author(s):  
Sheng Zeng ◽  
Triratna Muneshwar ◽  
Saralyn Riddell ◽  
Ajay Peter Manuel ◽  
Ehsan Vahidzadeh ◽  
...  
Keyword(s):  
Water Splitting ◽  
Noble Metals ◽  
Low Cost ◽  
Large Population ◽  
Life Time ◽  
Cost Effective ◽  
Atomic Layer ◽  
Photocurrent Density ◽  
Phonon Modes ◽  
Photoelectrochemical Performance

The lack of active, stable, earth-abundant, and visible-light absorbing materials to replace plasmonic noble metals is a critical obstacle for researchers in developing highly efficient and cost-effective photocatalytic systems. Herein, a core–shell nanotube catalyst was fabricated consisting of atomic layer deposited HfN shell and anodic TiO2 support layer with full-visible regime photoactivity for photoelectrochemical water splitting. The HfN active layer has two unique characteristics: (1) a large bandgap between optical and acoustic phonon modes (2) and no electronic bandgap, which allows a large population of long life-time hot carriers, which are used to enhance the photoelectrochemical performance. The photocurrent density (≈2.5 mA·cm−2 at 1 V vs. Ag/AgCl) obtained in this study under AM 1.5G 1 Sun illumination is unprecedented, as it is superior to most existing plasmonic noble metal-decorated catalysts and surprisingly indicates a photocurrent response that extends to 730 nm. The result demonstrates the far-reaching application potential of replacing active HER/HOR noble metals such as Au, Ag, Pt, Pd, etc. with low-cost plasmonic ceramics.

scholarly journals Design an Epoxy Coating with TiO2/GO/PANI Nanocomposites for Enhancing Corrosion Resistance of Q235 Carbon Steel

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2629
Author(s):  
Shimin Chen ◽  
Bo Li ◽  
Rengui Xiao ◽  
Huanhu Luo ◽  
Siwu Yu ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Photocurrent Density ◽  
Photoelectrochemical Performance ◽  
Q235 Steel ◽  
Protective Barrier ◽  
Barrier Coating ◽  
Pani Composite ◽  
Steel Protection ◽  
Q235 Carbon Steel

In this work, a ternary TiO2/Graphene oxide/Polyaniline (TiO2/GO/PANI) nanocomposite was synthesized by in situ oxidation and use as a filler on epoxy resin (TiO2/GO/PANI/EP), a bifunctional in situ protective coating has been developed and reinforced the Q235 carbon steel protection against corrosion. The structure and optical properties of the obtained composites are characterized by XRD, FTIR, and UV–vis. Compared to bare TiO2 and bare Q235, the TiO2/GO/PANI/EP coating exhibited prominent photoelectrochemical properties, such as the photocurrent density increased 0.06 A/cm2 and the corrosion potential shifted from −651 mV to −851 mV, respectively. The results show that the TiO2/GO/PANI nanocomposite has an extended light absorption range and the effective separation of electron-hole pairs improves the photoelectrochemical performance, and also provides cathodic protection to Q235 steel under dark conditions. The TiO2/GO/PANI/EP coating can isolate the Q235 steel from the external corrosive environment, and may generally be regarded a useful protective barrier coating to metallic materials. When the TiO2/GO/PANI composite is dispersed in the EP, the compactness of the coating is improved and the protective barrier effect is enhanced.

scholarly journals Photoelectrochemical performance of facet-controlled TiO2 nanosheets grown hydrothermally on FTO

2021 ◽  
Author(s):  
Fahimeh Shahvardanfard ◽  
Gihoon Cha ◽  
Nikita Denisov ◽  
Benedict Osuagwu ◽  
Patrik Schmuki
Keyword(s):  
Single Crystal ◽  
Tin Oxide ◽  
Photoelectrochemical Performance ◽  
Tio2 Nanosheets

Single crystal anatase TiO2 nanosheets (TiO2-NSs) are grown hydrothermally on fluorine-doped tin oxide (FTO).

Enhanced photoelectrochemical performance of Si nanowires by etching a single-crystal Si(100) wafer

2018 ◽  
Vol 448 ◽  
pp. 126-132 ◽  
Author(s):  
Linmeng Wang ◽  
Xiuquan Gu ◽  
Yulong Zhao ◽  
Meng Wei ◽  
Chunlai Huang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Si Nanowires ◽  
Photoelectrochemical Performance

A low-cost visible light activeBiFeWO6/TiO2nanocompositewith an efficient photocatalytic and photoelectrochemical performance

2018 ◽  
Vol 81 ◽  
pp. 84-92 ◽  
Author(s):  
A. Priya ◽  
Prabhakarn Arunachalam ◽  
A. Selvi ◽  
J. Madhavan ◽  
Abdullah M. Al-Mayouf ◽  
...  
Keyword(s):  
Visible Light ◽  
Low Cost ◽  
Photoelectrochemical Performance

scholarly journals Donor/Acceptor Photovoltaic Cells Fabricated on p-Doped Organic Single-Crystal Substrates

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2068 ◽  
Author(s):  
Yusuke Yabara ◽  
Seiichiro Izawa ◽  
Masahiro Hiramoto
Keyword(s):  
Single Crystal ◽  
Photovoltaic Cells ◽  
Photocurrent Density ◽  
Iron Chloride ◽  
Single Crystal Substrate ◽  
Organic Single Crystal ◽  
Crystal Substrate ◽  
Donor Acceptor ◽  
Doping Technique ◽  
P Type

In this study, the operation of donor/acceptor photovoltaic cells fabricated on homoepitaxially grown p-doped rubrene single-crystal substrates is demonstrated. The photocurrent density is dominated by the sheet conductivity (σ□) of the p-type single-crystal layer doped to 100 ppm with an iron chloride (Fe2Cl6) acceptor. A 65 μm thick p-type rubrene single-crystal substrate is expected to be required for a photocurrent density of 20 mA·cm−2. An entire bulk doping technique for rubrene single crystals is indispensable for the fabrication of practical organic single-crystal solar cells.

Engineering the kinetics and interfacial energetics of Ni/Ni–Mo catalyzed amorphous silicon carbide photocathodes in alkaline media

2016 ◽  
Vol 4 (18) ◽  
pp. 6842-6852 ◽  
Author(s):  
Ibadillah A. Digdaya ◽  
Paula Perez Rodriguez ◽  
Ming Ma ◽  
Gede W. P. Adhyaksa ◽  
Erik C. Garnett ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Amorphous Silicon ◽  
Photocurrent Density ◽  
Alkaline Media ◽  
Photoelectrochemical Performance ◽  
Amorphous Silicon Carbide ◽  
Interfacial Energetics

The photoelectrochemical performance of a-SiC photocathodes was enhanced by using a Ni/Ni-Mo dual-catalyst resulting in a significant increase of photocurrent density of −14 mA cm−2 at 0 V vs. RHE.

Tensile Properties of a Low-Cost First Generation Single Crystal Superalloy DD16

2013 ◽  
Vol 747-748 ◽  
pp. 478-482 ◽  
Author(s):  
Jian Wei Xu ◽  
Yun Song Zhao ◽  
Ding Zhong Tang
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Single Crystal ◽  
Tensile Properties ◽  
Cleavage Fracture ◽  
Room Temperature ◽  
First Generation ◽  
Low Cost ◽  
Single Crystal Superalloy ◽  
Fracture Characteristics

The tensile properties of a low-cost first generation single crystal superalloy DD16 have been investigated. The results show that values of the tensile strength and yield strength of DD16 alloy were similar at typical temperatures; from room temperature to 760, the yield strength of DD16 alloy increases; However, above 760, the yield strength of DD16 alloy decreases remarkably, and the maximum of the yield strength was 1145.5MPa at 760. From room temperature to 760, the fracture mode was cleavage fracture; But above 760, the fracture characteristics changed from cleavage to dimple.

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