Efficient photocatalysis and sustainable degradation of methylene blue by titanium dioxide and zinc oxide supported on spent FCC catalyst

2021 ◽  
Author(s):  
Jiasheng Xu ◽  
Te Zhang ◽  
Jianhua Qian ◽  
Jie Zhang
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Spent Fcc Catalyst ◽  
Fcc Catalyst

Photodegradation of New Methylene Blue N in Aqueous Solution Using Zinc Oxide and Titanium Dioxide as Catalyst

2012 ◽  
Author(s):  
Rusmidah Ali ◽  
Boon Siew Ooi
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Optimum Condition ◽  
Metal Ion ◽  
Optimum Ratio ◽  
Photodegradation Rate ◽  
Uv Visible ◽  
Uv Lamp

Dalam kajian ini, ZnO dan TiO2 digunakan sebagai fotomangkin dalam pendegradasian pewarna New Methylene Blue N (NMBN). Kadar fotodegradasi diukur menggunakan alat spektrofotometer UV-Vis. Dalam kajian ini, New Methylene Blue N menunjukkan nilai serapan pada λ = 590 nm dan λ = 286 nm. Lampu UV (λ = 354 nm) digunakan dalam proses fotodegradasi. Dalam proses degradasi menggunakan ZnO menunjukkan 81.42% NMBN terdegradasi pada λ = 590 nm dan 77.75% pada λ = 286 nm. Sebaliknya, degradasi menggunakan TiO2 adalah 25.68% pada λ = 590 nm dan 26.37% pada λ = 286 nm. Peratus degradasi New Methylene Blue N ialah 88.89% dan 68.94% pada masing-masing λ = 590 nm dan λ = 286 nm apabila ditambahkan dengan H2O2. Campuran ZnO dan TiO2 dalam nisbah 85: 15 (0.085 g; 0.015 g) merupakan campuran fotomangkin yang paling optimum iaitu dengan peratus degradasi NMBN sebanyak 96.97% dan 93.61% pada λ = 590 nm dan λ = 286 nm. Penambahan ion logam Cu2+ memberikan peratus degradasi tertinggi berbanding ion logam lain iaitu 83.83% pada λ = 590 nm. Penambahan ion logam Pb2+ memberikan peratus degradasi tertinggi pada λ = 286 nm iaitu 81.25% pewarna terdegradasi. Keadaan optimum dicapai pada pH 5.90, dengan peratus degradasi tertinggi iaitu 92.84% dan 89.30% pada masing-masing λ = 590 nm dan λ = 286 nm. Kata kunci: New Methylene Blue N; fotodegradasi; larutan; ZnO; TiO2 In this study, ZnO and TiO2 are used as photocatalyst to degrade the dye, New Methylene Blue N (NMBN). The photodegradation rate was measured using UV-Visible spectrophotometer. In this study, New Methylene Blue N showed absorption values at λ = 590 nm and λ = 286 nm. UV lamp (λ = 354 nm) is used in the photodegradation process. Results showed that ZnO is a better photocatalyst compared to TiO2. The degradation by ZnO showed that 81% of NMBN was degraded at λ = 590 nm and 77.75% at λ = 286 nm. In contratst, the degradation using TiO2 was 25.68% at λ = 590 nm and 26.37% at λ = 286 nm. The percent degradation of New Methylene Blue N is 88.89% and 68.94% at λ = 590 nm and λ = 286 nm respectively when H2O2 was added. A mixture of ZnO and TiO2 in the ratio of 85: 15 (0.085 g: 0.015 g) is the most optimum ratio for the mixed photocatalyst where the degradation percentage of NMBN are 96.97% and 93.61% at λ = 590 nm and λ = 286 nm. The addition of Cu2+ metal ion gave the highest percentage of degradation (83.83% at λ = 590 nm) compared to other metal ions. The addition of Pb2+ gave the highest percentage of degradation at λ = 286 nm with 81.25% degradation of the dye. The optimum condition was achieved at pH 5.90, which gave the highest percentage degradation, 92.84% and 89.30% at λ = 590 nm and λ = 286 nm respectively. Key words: New Methylene Blue N; photodegradation; aqueous; ZnO; TiO2

The spent FCC catalyst loaded with Sb-doped SnO2 and its application in electrocatalytic degradation of methylene blue

2020 ◽  
Vol 55 (28) ◽  
pp. 13605-13617
Author(s):  
Te Zhang ◽  
Jiasheng Xu ◽  
Jianhua Qian ◽  
Jie Zhang
Keyword(s):  
Methylene Blue ◽  
Spent Fcc Catalyst ◽  
Fcc Catalyst ◽  
Electrocatalytic Degradation

scholarly journals Photocatalytic Methylene Blue Degradation of Electrospun Ti–Zn Complex Oxide Nanofibers

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1311
Author(s):  
Wan-Tae Kim ◽  
Kyeong-Han Na ◽  
Dong-Cheol Park ◽  
Wan-Hee Yang ◽  
Won-Youl Choi
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Zinc Acetate Dihydrate ◽  
Complex Oxide ◽  
Electrospinning Process ◽  
Mixed Structure ◽  
Methylene Blue Degradation ◽  
Molar Ratios ◽  
Pollution Removal

Photocatalysts are the most important technology in air pollution removal and the detoxification of organic materials. Doping and complexation are among the most used methods to improve the efficiency of photocatalysts. Titanium dioxide and zinc oxide nanomaterials are widely used materials for photocatalysts and the degradation of toxic materials. Their mixed structure can be fabricated by many methods and the structure affects their properties. Nanofibers are efficient materials for photocatalysts due to their vertically formed structure, which improves the charge separation of photoelectrons. We fabricated them by an electrospinning process. A precursor consisting of titanium 4-isopropoxide, zinc acetate dihydrate and polyvinylpyrrolidone was used as a spinning solution for a mixed structure of titanium dioxide and zinc oxide with different molar ratios. They were then calcined, crystallized by heat treatment and analyzed by thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffractometer (XRD), field emission scanning electron microscope (FE-SEM) and energy-dispersive spectroscope (EDS). After annealing, the average diameters of the Ti–Zn complex oxide nanofibers were 237.6–278.6 nm with different salt ratios, and multiple crystalline structures were observed, namely TiO2, ZnO, ZnTiO3 and Zn2TiO4. We observed the photocatalytic performance of the samples and compared them according to the photodegradation of methylene blue. The methylene blue concentration decreased to 0.008–0.650 after three hours, compared to an initial concentration of 1, with different metal oxide structures.

Thermal and catalytic pyrolysis of waste polypropylene plastic using spent FCC catalyst

2021 ◽  
pp. 101455
Author(s):  
Eki Tina Aisien ◽  
Ifechukwude Christopher Otuya ◽  
Felix Aibuedefe Aisien
Keyword(s):  
Catalytic Pyrolysis ◽  
Spent Fcc Catalyst ◽  
Fcc Catalyst ◽  
Waste Polypropylene

Mycosynthesis of bimetallic zinc oxide and titanium dioxide nanoparticles for control of Spodoptera frugiperda

2021 ◽  
pp. 104910
Author(s):  
Jayaraman Kumaravel ◽  
Kandhasamy Lalitha ◽  
Murugan Arunthirumeni ◽  
Muthugounder Subramanian Shivakumar
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Spodoptera Frugiperda ◽  
Titanium Dioxide Nanoparticles

Photocatalytic degradation of methylene blue dye by porous zinc oxide nanofibers prepared via electrospinning: when defects become merits

2021 ◽  
pp. 149830
Author(s):  
Fabiola Pantò ◽  
Zainab Dahrouch ◽  
Abhirup Saha ◽  
Salvatore Patanè ◽  
Saveria Santangelo ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye

scholarly journals Biosynthesis of Tithonia diversifolia leaf mediated Zinc Oxide Nanoparticles loaded with flamboyant pods (Delonix regia) for the treatment of Methylene Blue Wastewater

2021 ◽  
pp. 103363
Author(s):  
Kehinde Shola Obayomi ◽  
Ayomide Elizabeth Oluwadiya ◽  
Sie Yon Lau ◽  
Adewumi Oluwasogo Dada ◽  
Divine Akubuo-Casmir ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Tithonia Diversifolia ◽  
Delonix Regia
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