Synthesis of enhanced corrosion resistant Fe–B–C–Ti amorphous ribbons and evaluation of their photodegradation efficiency under light irradiation

Chemosphere ◽  
2022 ◽  
Vol 287 ◽  
pp. 132175
Author(s):  
Mingqing Zuo ◽  
Mokrema Moztahida ◽  
Dae Sung Lee ◽  
Seonghoon Yi
Keyword(s):  
Light Irradiation ◽  
Corrosion Resistant ◽  
Amorphous Ribbons ◽  
Photodegradation Efficiency

Photocatalytic properties of p-n heterojunction Ag2CO3/Ag3PO4/Ni thin films under visible light

2019 ◽  
Vol 12 (06) ◽  
pp. 1950085 ◽  
Author(s):  
Di Zhao ◽  
Xuezheng An ◽  
Yaxian Sun ◽  
Guihua Li ◽  
Hongyan Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photodegradation Efficiency

p-n heterojunction Ag2CO3/Ag3PO4/Ni thin films were prepared by electrochemical co-deposition. The surface morphology and structural properties of the thin films were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic (PC) properties of the Ag2CO3/Ag3PO4/Ni composite thin films were investigated by their ability to degrade rhodamine B (RhB) and Congo red (CR) under visible light irradiation. The results showed that the photodegradation efficiency of RhB by an Ag2CO3/Ag3PO4/Ni thin film under visible-light irradiation for 30[Formula: see text]min (98.84%) was 2.64 times higher than that of an Ag3PO4/Ni thin film and 3.44 times higher than of an Ag2CO3/Ni thin film. The presence of a [Formula: see text]-[Formula: see text] heterojunction greatly increased the charge conductivity of the film and its ability to photocatalytically reduce dissolved oxygen, which are the main reasons for the improved PC performance of the Ag2CO3/Ag3PO4/Ni films.

scholarly journals Enhanced photocatalytic activity for degrading phenol in seawater by TiO2-based catalysts under weak light irradiation

RSC Advances ◽  
2017 ◽  
Vol 7 (51) ◽  
pp. 31921-31929 ◽  
Author(s):  
Ting Wang ◽  
Zhi-yong Xu ◽  
Li-guang Wu ◽  
Bing-rui Li ◽  
Mei-xi Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Irradiation ◽  
Phenol Adsorption ◽  
Photodegradation Efficiency ◽  
Weak Light

Given the small size and distribution of TiO2, catalysts with strong phenol adsorption showed high photodegradation efficiency in seawater.

Highly Efficient Photocatalysts Based on Lamellar-Shaped Bi2S3 Grown on TiO2 Monolith

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1850110
Author(s):  
Kaidi Li ◽  
Fangfang Zhang ◽  
Huiming Wang ◽  
Yalan Zhou ◽  
Lixin Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Electrode Potential ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Molar Ratio ◽  
Step Method ◽  
Photodegradation Efficiency ◽  
Photodegradation Rate

Here, the lamellar-shaped Bi2S3 grown on a porous TiO2 monolith was obtained by a two-step method including a sol–gel route and hydrothermal treatment. The photocatalytic activity of the as-synthesized Bi2S3/TiO2 composites was evaluated for photodegradation of methylene blue (MB) dye in aqueous solution under the visible-light irradiation. Based on our experimental results, 5% (molar ratio of Bi2S3 to TiO[Formula: see text] Bi2S3/TiO2 photocatalysts exhibited a maximum photodegradation rate of MB up to 96.9% under visible-light irradiation for 120 min. Our findings indicated that the lamellar-shaped Bi2S3 can extend the light absorption up to visible areas, and porous TiO2 can provide enhanced specific surface area and more mass transfer pathway to enhance the photodegradation efficiency. Furthermore, porous TiO2 can accept the electrons from the Bi2S3 conduction band due to the relatively positive electrode potential to impede the photoproduced electron and hole combination to result in advanced photocatalytic performance.

Highly photodegradation of organic dye pollutant RhB using TiO2-modified reduced graphene oxide

2021 ◽  
Author(s):  
Rahmat Hidayat ◽  
Sayekti Wahyuningsih ◽  
Ganjar Fadillah ◽  
Ari Handono Ramelan
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
Process Step ◽  
Photodegradation Efficiency ◽  
Reduced Graphene

Abstract TiO2-modified reduced graphene oxide (TiO2-rGO) has been studied in one-process step synthesis via the hydrothermal method. In this study, the various concentrations of rGO were investigated and characterized by fourier transform infrared (FTIR), x-ray diffraction (XRD), scanning electron microscope (SEM), surface area analyzer (SAA), thermogravimetric analysis/differential thermal analysis (TGA/DTA), and spectroscopy UV-Vis. In addition, the photodegradation of rhodamine-B was studied by a batch system under visible light irradiation at wavelength 554 nm. The optimum experimental results showed that the presence of rGO in TiO2 nanostructures could improve the specific surface area until 248.58 m2 g− 1 and enhanced the photodegradation efficiency until 70.66% under visible light irradiation. The photocatalyst stability was evaluated for five cycles experiment and the performance have reduced 6.58% efficiency.

Photocatalytic Degradation of Carbaryl over Novel MWNT-TiO2 Nanocomposite under Visible Light Irradiation

2011 ◽  
Vol 233-235 ◽  
pp. 476-480
Author(s):  
Ke Dai ◽  
Hai Bo Chen ◽  
Xu Li ◽  
Hao Chen ◽  
Qiao Yun Huang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Ring Opening ◽  
Uv Light ◽  
Light Irradiation ◽  
Photodegradation Efficiency ◽  
Uv Light Irradiation ◽  
Ring Opening Reaction ◽  
Visible Light Driven ◽  
Direct Growth

The MWNT-TiO2nanocomposite was synthesized via direct growth of TiO2nanoparticles on the surface of the functionalized MWNTs by the hydrothermal treatment and utilized as the photocatalyst in the carbaryl degradation under both visible light and UV light irradiation. Visible-light-driven activity and enhanced UV-light-driven activity are both achieved as the composite MWNTs with TiO2can efficiently enhance the light absorption and charge separation and then photocatalytic activity. The photodegradation efficiency of carbaryl was examined by HPLC and IC techniques, which demonstrates that carbaryl can be readily degraded under visible light irradiation. Based on the obtained experimental results, assisted with the computer simulation of carbaryl molecule on PM3 level, it is presumed that the degradation of carbaryl starts with the break of N21-C23 and C19-N21 bonds and ends in the generation of naphthalen-1-ol before the ring-opening reaction.

Synthesis, characterization and enhanced visible light photocatalytic activity of Bi2MoO6/Zn–Al layered double hydroxide hierarchical heterostructures

2014 ◽  
Vol 4 (4) ◽  
pp. 1028-1037 ◽  
Author(s):  
Haiping Li ◽  
Quanhua Deng ◽  
Jingyi Liu ◽  
Wanguo Hou ◽  
Na Du ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Layered Double Hydroxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalytic Activity ◽  
Photodegradation Efficiency ◽  
Double Hydroxide ◽  
Visible Light Photocatalytic

A Bi2MoO6/Zn–Al LDH heterostructure exhibits significantly enhanced photodegradation efficiency for RhB relative to Bi2MoO6 under visible light irradiation.

Ni-Mo-Cr-B Alloys: Corrosion Resistant Amorphous Hardfacing Coatings

1983 ◽  
Vol 28 ◽  
Author(s):  
S. K. Das ◽  
E. M. Norin ◽  
R. L. Bye
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Plasma Spraying ◽  
Corrosion And Wear ◽  
X Ray Diffraction ◽  
Corrosion Resistant ◽  
X Ray ◽  
Amorphous Ribbons ◽  
Transmission Electron ◽  
Rapidly Solidified

ABSTRACTA series of rapidly solidified Ni-Mo-Cr-B alloys have been investigated for possible application as corrosion resistant hardfacing coatings. As-cast amorphous ribbons were pulverized to powder, which was subsequently applied to a substrate by plasma spraying. The coatings are substantially amorphous, as revealed by x-ray diffraction and transmission electron microscopy. They exhibit ∼95% of theoretical density and exhibit good corrosion and wear resistances, superior to those of many commercially available hardfacing coatings.

scholarly journals Effect of Cu doping on the photocatalytic activity of InVO4 for hazardous dye photodegradation under LED light irradiation and its mechanism

2021 ◽  
Author(s):  
Mohamed Faisal ◽  
Anwar Iqbal ◽  
Farook Adam ◽  
R. Jothiramalingam
Keyword(s):  
Photoelectron Spectroscopy ◽  
Active Species ◽  
Light Irradiation ◽  
Oh Radicals ◽  
One Pot ◽  
Cu Doping ◽  
Led Light ◽  
Photodegradation Efficiency ◽  
Optimum Reaction ◽  
Mineralization Degree

Abstract Cu doped InVO4 (xCu-InVO4 (x = 0.06–0.15 wt %) was synthesized by a facile one-pot hydrothermal method for the removal of methylene blue (MB) under LED light irradiation. The X-ray photoelectron spectroscopy (XPS) analysis indicated the coexistence of V5+ and V4+ species due to the O-deficient nature of the xCu-InVO4. The synthesized photocatalysts displayed a morphology of spherical and square shaped particles (20–40 nm) and micro-sized rectangle rods with a length range of 100–200 μm. The xCu-InVO4 exhibited superior adsorption and photodegradation efficiency compared to pristine InVO4 and TiO2 due to the presence of O2 vacancies, V4+/V5+ species, and Cu dopant. The optimum reaction conditions were found to be 5 mg L−1 (MB concentration), pH 6, and 100 mg of photocatalyst mass with a removal efficiency and mineralization degree of 100% and 96.67%, respectively. The main active species responsible for the degradation of MB were •OH radicals and h+. Reusability studies indicated that the 0.13Cu-InVO4 was deactivated after a single cycle of photocatalytic reaction due to significant leaching of V4+ and Cu2+ species.

High photodegradation efficiency of phenol by mixed-metal–organic frameworks

2016 ◽  
Vol 3 (7) ◽  
pp. 944-951 ◽  
Author(s):  
Mohammad Yaser Masoomi ◽  
Minoo Bagheri ◽  
Ali Morsali ◽  
Peter C. Junk
Keyword(s):  
Aqueous Solutions ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Frameworks ◽  
Phenol Degradation ◽  
Light Irradiation ◽  
Mixed Metal ◽  
Photodegradation Efficiency ◽  
Metal Organic

Four MOFs, TMU-5, TMU-5(Cd 15%), TMU-5(Cd 30%) and (TMU-7) were synthesized and studied for phenol degradation from aqueous solutions under UV and/or visible light irradiation without auxiliary oxidants such as H2O2.

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