scholarly journals Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3856
Author(s):  
Xiong Zhang ◽  
Guanghui Chen ◽  
Weihua Li ◽  
Dianwu Wu
Keyword(s):  
Open Circuit ◽  
Pure Tio2 ◽  
Band Alignment ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Tio2 Nanorod ◽  
Simulated Solar Light ◽  
Tio2 Nanorod Arrays ◽  
Photocathodic Protection

In this work, a novel double layer made of ZnO nanorod arrays and TiO2 nanorod arrays with anticorrosion function were successfully prepared on fluorine-doped tin oxide (FTO) substrate by a simple low-temperature solvothermal method. As compared with the pure TiO2 and pure ZnO film, the combination of the two films presented higher photocathodic protection performance for 316 stainless steel (316 SS) and Q235 carbon steel in 3.5 wt% NaCl solution. The composite film with ZnO nanoparticles layer between ZnO nanorod arrays and TiO2 nanorod arrays exhibited the best photocathodic performance, which lowered the open circuit potential (OCP) of 316 SS and Q235 to −991 mV, −1066 mV, respectively. The results demonstrated that the formation of the uniform heterojunction film and the small difference in band alignment played important roles in the promotion of photocathodic protection performance.

scholarly journals Photocathodic Protection of Cobalt Doped ZnO Nanorod Arrays for 316 Stainless Steel and Q235 Carbon Steel in 3.5 wt.% NaCl Solution

2019 ◽  
Author(s):  
Xiong Zhang ◽  
Guanghui Chen ◽  
Weihua Li ◽  
Dianwu Wu
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Nacl Solution ◽  
316 Stainless Steel ◽  
Q235 Carbon Steel ◽  
Doped Zno ◽  
Photocathodic Protection

In this work, cobalt doped ZnO nanorod arrays with anticorrosion function were successfully prepared on FTO substrate by a simple aqueous solution method. XRD and EDS results indicate the doped Co2+ has successfully incorporated into the ZnO crystal lattice. Photocurrent density and open circuit potential (OCP) results indicate the photocathodic protection performance for 316 stainless steel (316 SS) and Q235 carbon steel in 3.5 wt.% NaCl solution under 300 W Xe lamp enhanced with the increase of cobalt concentration, and the photoanode with 15% Co/Zn ratio has the optimal photocathodic protection effect. The mechanism of enhancement may be result from the narrowed band gap, the lower recombination rate of photogenerated electron-holes, the intermediate impurity level and the split of the hypo-outer shell of cobalt ions.

scholarly journals Enhanced Photoelectrochemical Properties of Ti3+ Self-Doped Branched TiO2 Nanorod Arrays with Visible Light Absorption

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1791 ◽  
Author(s):  
Jingyang Wang ◽  
Xiantao Wang ◽  
Jun Yan ◽  
Qi Tan ◽  
Guijie Liang ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Oxygen Vacancies ◽  
Pure Tio2 ◽  
Photoelectrochemical Properties ◽  
Nanorod Arrays ◽  
Optical Absorption Edge ◽  
Tio2 Nanorod ◽  
Conductive Glass ◽  
Tio2 Nanorod Arrays ◽  
Tio2 Nras

A novel Ti3+ self-doped branched rutile TiO2 nanorod arrays (NRAs) was successfully grown on an F-doped tin oxide (FTO) transparent conductive glass by a combined hydrothermal and magnetron sputtering method. Surface morphology, structure, optical properties, and photoelectrochemical behavior of the branched TiO2 NRAs are determined. Using TiO2 nanoparticles (NPs) deposited on the top of the nanorods as seeds, TiO2 nanobranches can easily grow on the top of the nanorods. Moreover, the Ti3+ defects in the TiO2 NPs and associated oxygen vacancies, and the nanobranches expend the optical absorption edge of the TiO2 NRAs from 400 nm to 510 nm. Branched TiO2 NRAs exhibit excellent photoelectrochemical properties compared to the pure TiO2 NRAs, as revealed by photoelectrochemical measurements. This enhanced photoelectrochemical properties is induced by the increased surface area and expanded optical absorption range. Due to their favorable characteristics, these novel branched TiO2 NRAs will provide a new path to the fabrication of hierarchical nanostructured materials.

scholarly journals Trace Amounts of Co3O4 Nano-Particles Modified TiO2 Nanorod Arrays for Boosted Photoelectrocatalytic Removal of Organic Pollutants in Water

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 214
Author(s):  
Yongling Du ◽  
Zhixiang Zheng ◽  
Wenzhuo Chang ◽  
Chunyan Liu ◽  
Zhiyong Bai ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Ph Value ◽  
Waste Water Treatment ◽  
Pure Tio2 ◽  
Nano Particles ◽  
Nanorod Arrays ◽  
Tio2 Nanorod ◽  
Tio2 Nanorod Arrays ◽  
Photochemical Deposition ◽  
Model Reactions

Trace amounts of Co3O4 modified TiO2 nanorod arrays were successfully fabricated through the photochemical deposition method without adding any nocuous reagents. The Co3O4/TiO2 nanorod arrays fabricated in acid solution had the highest photo-electrochemical activity. We elaborated on the mechanism of Co3O4-TiO2 fabricated in different pH value solutions. The Co3O4-TiO2 had a more remarkable photo-electrochemical performance than the pure TiO2 nanorod arrays owing to the heterojunction between Co3O4 and TiO2. The degradation of methylene blue and hydroquinone was selected as the model reactions to evaluate the photo-electrochemical performance of Co3O4-TiO2 nanorod arrays. The Co3O4/TiO2 nanorod arrays had great potential in waste water treatment.

scholarly journals Photocathodic Protection of Cobalt Doped ZnO Nanorod Arrays for 316 Stainless Steel and Q235 Carbon Steel in 3.5 wt.% NaCl Solution

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 803
Author(s):  
Xiong Zhang ◽  
Guanghui Chen ◽  
Weihua Li ◽  
Dianwu Wu
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Nacl Solution ◽  
316 Stainless Steel ◽  
Q235 Carbon Steel ◽  
Doped Zno ◽  
Photocathodic Protection

In this work, cobalt-doped ZnO nanorod arrays with anticorrosion function were successfully prepared on fluorine-doped tin oxide (FTO) substrates by a simple aqueous solution method. The XRD patterns and the energy-dispersive X-ray spectroscopy (EDX) analysis indicate the doped Co2+ were successfully incorporated into the ZnO crystal lattice. The photocurrent density and open circuit potential (OCP) results indicate the photocathodic protection performance for 316 stainless steel (316 SS) and Q235 carbon steel in a 3.5 wt.% NaCl solution under a Xe lamp with a power of 300 W was enhanced with the increase of cobalt concentration, and the photoanode with a 15% Co/Zn ratio had the optimal photocathodic protection effect. The mechanism of enhancement may be result from the narrowed band gap, the lower recombination rate of the photogenerated electron-hole pairs, the intermediate impurity level, and the split of the hypo-outer shell of cobalt ions.

Controlled growth of highly pure TiO2 nanorod arrays/nanoflower clusters via one-step hydrothermal route

2018 ◽  
Vol 29 (14) ◽  
pp. 12169-12177 ◽  
Author(s):  
Fuqiang Guo ◽  
Haineng Bai ◽  
Baohua Zhang ◽  
Xin Li ◽  
Qian Yang ◽  
...  
Keyword(s):  
Pure Tio2 ◽  
Controlled Growth ◽  
Nanorod Arrays ◽  
Hydrothermal Route ◽  
Tio2 Nanorod ◽  
Tio2 Nanorod Arrays ◽  
One Step

High-Efficiency Dye-Sensitized Solar Cell Based on ZnO Nanorod Arrays Electrode

2006 ◽  
Vol 974 ◽  
Author(s):  
Patcharee Charoensirithavorn ◽  
Susumu Yoshikawa
Keyword(s):  
High Efficiency ◽  
Cell Structure ◽  
Short Circuit ◽  
Transparent Conducting Oxide ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Dye Sensitized

ABSTRACTWe have fabricated transparent ZnO nanorod arrays on the fluorine-doped SnO2 transparent conducting oxide (FTO) glass substrates and used them as the wide band gap semiconductor in dye-sensitized solar cells. Our objectives are to introduce and demonstrate new possibilities in designing the semiconductor morphology. The best performance with this cell structure produced an open circuit voltage (Voc) of 0.64 mV, a short circuit current density (Jsc) of 5.37 mA/cm2, a fill factor (FF) of 0.49, and a conversion efficiency (η) of 1.69 %, primarily limited by the surface area of the nanorod array.

Photoelectrochemical water splitting using TiO2 nanorod arrays coated with Zn-doped CdS

2021 ◽  
Vol 56 (18) ◽  
pp. 11059-11070
Author(s):  
Xichen Yu ◽  
Qingqing Xing ◽  
Xiaoping Zhang ◽  
Hanlin Jiang ◽  
Fengren Cao
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Nanorod Arrays ◽  
Tio2 Nanorod ◽  
Tio2 Nanorod Arrays

Controllable Fabrication of Patterned ZnO Nanorod Arrays: Investigations into the Impacts on Their Morphology

2012 ◽  
Vol 4 (6) ◽  
pp. 2969-2977 ◽  
Author(s):  
Dian-bo Zhang ◽  
Shu-jie Wang ◽  
Ke Cheng ◽  
Shu-xi Dai ◽  
Bin-bin Hu ◽  
...  
Keyword(s):  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Controllable Fabrication
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