scholarly journals Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

2015 ◽  
Vol 3 (6) ◽  
pp. 207 ◽  
Author(s):  
Endang Tri Wahyuni
Keyword(s):  
Reduction Method ◽  
Gold Recovery ◽  
Photocatalytic Reduction

Preparation of TiO2 (Au) Nanotubes by Hydrothermal Method for Photocatalytic Reduction of Cd2+ Ions

2014 ◽  
Vol 609-610 ◽  
pp. 375-381
Author(s):  
Chun Xiao Feng ◽  
Guang Qing Xu ◽  
Jun Lv ◽  
Zhi Xiang Zheng ◽  
Yu Cheng Wu
Keyword(s):  
Hydrothermal Method ◽  
Au Nanoparticles ◽  
Reduction Method ◽  
Photocatalytic Reduction ◽  
Photocatalytic Properties ◽  
Absorption Intensity ◽  
Reducing Ability ◽  
Highly Dispersed ◽  
Naoh Solution ◽  
Hydrothermal Reduction

Highly dispersed TiO2 nanotubes (TiO2-NTs) were synthesized via the reaction of anatase TiO2 powder with NaOH solution. Au nanoparticles of about 5 nm were deposited on the surface of TiO2-NTs with hydrothermal reduction method. The prepared nanocomposites were well characterized with TEM and XRD. Their photocatalytic properties and reducing ability were investigated by UV-Vis absorption and photocatalytic reduction of Cd2+ ions with different amount of TiO2-NTs and TiO2-NTs (Au) varying from 0.1g to 0.001g. The results from absorption patterns and AAS showed that the absorption intensity of TiO2-NTs (Au) was higher compared with that of TiO2-NTs. Moreover, the concentration of remanent Cd2+ (0.48mg/L) using TiO2-NTs (Au) was lower than that of Cd2+ (0.65mg/L) using TiO2-NTs.

scholarly journals Effect of Pulsed Light Irradiation on Patterning of Reduction Graphene Oxide-Graphene Oxide Interconnects for Power Devices

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1042
Author(s):  
Eunmi Choi ◽  
Sunggyu Pyo
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Film Thickness ◽  
Photon Energy ◽  
Reduction Method ◽  
Thermal Reduction ◽  
Photocatalytic Reduction ◽  
Composite Sheet ◽  
Power Devices ◽  
Successful Production

Reduction graphene oxide (r-GO) lines on graphene oxide (GO) films can be prepared by a photocatalytic reduction and photothermal reduction method. A mechanism of partial GO reduction by pulsed photon energy is identified for preparing patterned rGO-GO films. The photocatalytic reduction method efficiently reduces GO at low photon energies. The successful production of a patterned rGO-GO film without damage by the photo thermal reduction method is possible when an energy density of 6.0 or 6.5 J/m2 per pulse is applied to a thin GO film (thickness: 0.45 μm). The lowest resistance obtained for a photo-reduced rGO line is 0.9 kΩ sq−1. The GO-TiO2 pattern fabricated on the 0.23 μm GO-TiO2 composite sheet through the energy density of each pulse is 5.5 J/m2 for three pulses.

scholarly journals INFLUENCE OF CYANIDE ON REMOVAL OF COPPER ION FROM THE SOLUTION BY PHOTOCATALYTIC REDUCTION METHOD WITH TiO2 SUSPENSION

2010 ◽  
Vol 10 (1) ◽  
pp. 32-35 ◽  
Author(s):  
Endang Tri Wahyuni ◽  
Mudasir Mudasir ◽  
Tania Avia Gusman
Keyword(s):  
Reduction Method ◽  
Copper Ion ◽  
Photocatalytic Reduction ◽  
Tio2 Photocatalyst ◽  
Solution Ph ◽  
Copper Cyanide ◽  
Research Results ◽  
Low Degree ◽  
Batch Technique ◽  
Uv Lamp

The removal of Cu(II) by photoreduction method using TiO2 photocatalyst in the presence of CN- is reported. Photoreduction was carried by batch technique using UV lamp with 290-350 nm of wavelength. The research results indicate that the present of CN- ion gives different effects on the photoreduction effectiveness depends on the mole ratio of both ions. The addition of CN- less than 2 moles for each mole of Cu (II) ion can improve the photoreduction, and the photoreduction sharply goes down into very low degree when the mole number of CN- is increased up to 4, and by further enlarging the mole number into 6, the photoreduction degree remains constant. Furthermore, increasing solution pH generally leads to a decrease in the photoreduction. In the solution with pH 1, the maximal photoreduction degree is reached, while increasing pH from 1 to 9 has declined the photoreduction, and the photoreduction is totally inhibited at pH higher than 9. The effect of the solution pH is related with the speciation of Cu (II), CN- and TiO2 in the solution.   Keywords: Photoreduction, copper, cyanide, TiO2 photocatalyst

A Photocatalytic Reduction Method for the Preparation of TiO2 Nanobelt Supported Noble Metals (Ag, Au)

2009 ◽  
Vol 9 (3) ◽  
pp. 2119-2123 ◽  
Author(s):  
Yanmin Wang ◽  
Guojun Du ◽  
Hong Liu ◽  
Duo Liu ◽  
Shubin Qin ◽  
...  
Keyword(s):  
Noble Metals ◽  
Reduction Method ◽  
Photocatalytic Reduction ◽  
Supported Noble Metals

Type -Reduction Method on Fuzzy Critical Path

2019 ◽  
Vol 7 (1) ◽  
pp. 256-259
Author(s):  
P.Balasowandari ◽  
Dr. V.Anusuya
Keyword(s):  
Reduction Method ◽  
Critical Path ◽  
Type Reduction
Sign in / Sign up

Export Citation Format

Share Document