Synthesis and Photocatalytic Activity of Cu2O Microspheres upon Methyl Orange Degradation

2020 ◽  
Vol 63 (5-6) ◽  
pp. 586-600 ◽  
Author(s):  
D. A. Prado-Chay ◽  
M. A. Cortés-Jácome ◽  
C. Angeles-Chávez ◽  
R. Oviedo-Roa ◽  
J. M. Martínez-Magadán ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Methyl Orange Degradation

scholarly journals The Role of H2C2O4 and Na2CO3 as Precipitating Agents on The Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide

2020 ◽  
Vol 18 (1) ◽  
pp. 129-137
Author(s):  
Yayuk Astuti ◽  
Rizka Andianingrum ◽  
Abdul Haris ◽  
Adi Darmawan ◽  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Physicochemical Properties ◽  
Bismuth Oxide ◽  
Rate Constants ◽  
Degradation Rate ◽  
Precipitation Method ◽  
Methyl Orange Degradation ◽  
Methyl Orange Dye

AbstractSynthesis of bismuth oxide synthesis through the precipitation method using H2C2O4 and Na2CO3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO3)3.5H2O in HNO3, then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H2C2O4 precipitating agent was a yellow powder containing a mixture of α-Bi2O3 (monoclinic) and β-Bi2O3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na2CO3 as precipitating agent resulted in bismuth oxide consisting of α-Bi2O3 and β-Bi2O3 and Bi2O4, irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H2C2O4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na2CO3 on degrading methyl orange dye with degradation rate constants of 2.35x10-5 s-1 for H2C2O4 and 1.81x10-5 s-1 for Na2CO3.

scholarly journals Synthesis of NiFe2O4-LDH Composites with High Adsorption and Photocatalytic Activity for Methyl Orange Degradation

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 98 ◽  
Author(s):  
Cristian Valencia-Lopez ◽  
Mario Zafra-Calvo ◽  
María Martín de Vidales ◽  
Verónica Blanco-Gutierrez ◽  
Evangelina Atanes-Sanchez ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Oxidation ◽  
Uv Light ◽  
Oh Radicals ◽  
Methyl Orange Degradation ◽  
Light Emitting ◽  
Multifunctional Material ◽  
Double Hydroxide ◽  
Remediation Process

The presence of hazardous chemicals in wastewater produced by industrial activities and human metropoles is threating the availability of safe drinking water. The development of a multifunctional material coupling adsorption and photocatalytic activity is hereby particularly promising for the removal of pollutants. We have proved the adsorption and catalytic activity of NiFe2O4-layered double hydroxide (LDH) composite through the degradation of methyl orange (MO) at room temperature under visible light. This degradation is enhanced by using a set of small light-emitting diodes (LEDs) providing a uniform 405 nm UV light. The remediation process is based on a first-step rapid adsorption of MO molecules by the LDH structures followed by the photocatalytic oxidation of the pollutant by the (·OH) radicals produced by the NiFe2O4 semiconductor nanoparticles (NPs). The magnetic properties of the ferrite NPs allow a facile separation of the composite from the liquid media via a simple magnet. NiFe2O4-LDH composite could find wide application as a highly effective adsorbent/oxidizing catalyst operating under visible or near UV light.

Co-Sol-Gel Preparation of SiO2-Doped TiO2 on Adsorption and Photocatalytic Degradation of Methyl Orange

2011 ◽  
Vol 48-49 ◽  
pp. 345-348
Author(s):  
Li Li Yang ◽  
Yan Liang Qu ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Adsorption Equilibrium ◽  
Irradiation Time ◽  
Sol Gel ◽  
Methyl Orange Degradation ◽  
Doped Tio2 ◽  
Degradation Rates ◽  
Gel Preparation ◽  
Degradation Of Methyl Orange

A co-sol-gel method was used to prepare SiO2-doped TiO2. The amount of ethyl silicate added into the precursor, calcination temperature and time, adsorption equilibrium, and photocatalytic activity of the material were investigated as the factor of degradation efficiency. With the optimum composition of the precursor, the prepared gel calcinated at 500 oC for 3 h showed the highest photocatalytic activity. After 30 min stirring to reach adsorption equilibrium, adsorption contributed less than 2% to the total decoloration of methyl orange on the SiO2-doped TiO2 material. Photocatalytic methyl orange degradation continued with increasing irradiation time. Methyl orange degradation rates after 30 min and 100 min were 31.1% and 96.9%, respectively.

Methyl orange degradation over a novel Bi-based photocatalyst Bi3SbO7: Correlation of crystal structure to photocatalytic activity

2008 ◽  
Vol 78 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Xinping Lin ◽  
Fuqiang Huang ◽  
Wendeng Wang ◽  
Zhichao Shan ◽  
Jianlin Shi
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Methyl Orange Degradation

Design of ordered mesoporous H3PW12O40-titania materials and their photocatalytic activity to dye methyl orange degradation

2010 ◽  
Vol 11 (9) ◽  
pp. 839-843 ◽  
Author(s):  
Kexin Li ◽  
Yingna Guo ◽  
Fengyan Ma ◽  
Huichao Li ◽  
Ling Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Methyl Orange Degradation ◽  
Ordered Mesoporous

Photocatalytic Activity of F-/ SiO2/TiO2 Nanowires

2010 ◽  
Vol 177 ◽  
pp. 284-286
Author(s):  
Shao Hua Zhang ◽  
Jian Jun Wang ◽  
Bing Xie ◽  
Yu Wei
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Nanowire Arrays ◽  
Methyl Orange Degradation ◽  
Tio2 Nanowire ◽  
Degradation Ratio ◽  
Photocatalytic Activities ◽  
Ordered Porous

Titania nanowire arrays were synthesized in highly ordered porous anodic alumina template by sol-gel method. The samples were characterized by means of SEM, XRD. The photocatalytic property of TiO2, SiO2/ TiO2, F-/SiO2/TiO2 nanowire arrays were studied by methyl orange degradation. The results show that F-/ SiO2/ TiO2 nanowire arrays have higher photocatalytic activities than those of TiO2 and SiO2 /TiO2. Under the condition of 1 h irradiation, the degradation ratio of methyl orange exceeds 90%. At the same time, the higher photocatalytic activity and the smaller crystal size of F-/ SiO2/ TiO2 are related to the incorporation of F-.

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