Article
Chemistry, Inorganic & Nuclear
Imen Jendoubi, Maciej Ptak, Mohamed Faouzi Zid
Summary: This study prepared Na2Mn2(MoO4)(3) double molybdate by sol-gel method to investigate its structural, morphological, and optical properties. The compound exhibited high photocatalytic efficiency for methylene blue degradation under natural sunlight, making it a potential candidate for visible-light-driven dye wastewater treatment. The proposed photodegradation mechanism involves the generation of hydroxyl radicals and superoxide anions attacking the dye molecules to decompose them into carbon dioxide and water.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Physical
Irfan Qadir, Amit Kumar Atri, Sumit Singh, Shikha Sharma, Ujwal Manhas, Devinder Singh
Summary: This work presents a study on the synthesis and characterization of new Ruddlesden-Popper phases, LaSrFe1-xCrxO4, and their application in the photocatalytic degradation of dyes. The effect of Cr3+ doping on the crystal structure, optical and magnetic properties of the LaSrFeO4 phase is systematically explored. The results show changes in lattice parameters, unit cell volume, energy band gap, and magnetic interactions with Cr3+ doping. The photocatalytic activity of the phases is enhanced with the addition of Cr3+ substitution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Zelin Xia, Shuang Xing, Hualin Wang, Dongyang Zhao, Sumei Wu, Weiwei Jiang, Nan Wang, Shimin Liu, Chaoqian Liu, Wanyu Ding, Zhihua Zhang
Summary: Fe-doped TiO2 nanoparticles with pure anatase structure and spherical morphology were successfully synthesized through coprecipitation method. The crystallite size increased with the increase of calcination temperatures. Fe doping decreased the energy band gap (Eg) of TiO2, leading to enhanced photocatalytic performance. The maximum degradation efficiency of methyl orange (MO) reached 46.3% under visible light irradiation for Fe-doped TiO2 nanoparticles with a Fe doping concentration of 0.3 at.% and calcination temperature of 300?.
Article
Materials Science, Multidisciplinary
M. C. Shibu, M. D. Benoy, G. Suresh Kumar, J. Duraimurugan, V. Vasudevan, Mohd. Shkir, Omar AL-Otaibi
Summary: In this study, a novel MWCNT/copper oxide hybrid nanocomposite and pristine copper oxide were synthesized using hydrothermal techniques and used as a sunlight-driven photocatalyst for the degradation of methyl orange organic pollutant. The inclusion of MWCNTs significantly impacted the crystalline phase, lattice parameters, particle size, shape, and optical band gap. After 6 hours of sunlight exposure, the MWCNT/copper oxide nanocomposite exhibited a higher photodegradation efficiency than pure copper oxide, making it a promising photocatalyst for wastewater treatment.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Peter A. Ajibade, Abimbola E. Oluwalana, Lebogang L. R. Mphahlele
Summary: The study investigated the effect of thermolysis temperature on the morphological and optical properties of cadmium sulphide quantum dots, showing that temperature influences particle size and photocatalytic degradation efficiency. The analysis also revealed band gaps and electrochemical properties of the quantum dots, emphasizing the importance of temperature control in synthesis processes.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Physical
Sivuyisiwe Mapukata, Jonathan Britton, Nnamdi Nwahara, Tebello Nyokong
Summary: Hematite nanofibers modified with phthalocyanine show enhanced photocatalytic activity in the photoinactivation of S. aureus and photooxidation of methyl orange. Different types of modified nanofibers (4-Fe2O3 and 5-Fe2O3) exhibit comparable antibacterial activity, with 5-Fe2O3 showing the best oxidation efficiency for methyl orange.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Tesfaye Haile Habtemariam, V. J. T. Raju, Yonas Chebude
Summary: The photocatalytic performance of {[Cu-2(Fu)(2)(BPY)]center dot H2O}(n), a pillared-layer metal-organic framework (MOF), is studied for the degradation of methyl orange, a toxic and non-biodegradable dye. The MOF, in the presence of UV light, efficiently degrades 96% of 10-ppm methyl orange after 140 min irradiation at pH 5.2 with a MOF loading of 0.25 g L-1. The MOF can be recycled five times with maintained crystallinity and degradation efficiencies ranging from 96% to 53% in each cycle.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Chemical
L. Babedi, M. Tadie, P. Neethling, B. P. von der Heyden
Summary: A series of sphalerite mineral samples substituted with cadmium, cobalt, and iron were synthesized to investigate the impact of cation substitution on the crystal structure, bonding environment, and electronic properties of sphalerite. Results from XRD, Raman, and zeta potential experiments showed that cation substitution altered the lattice distortions, introduced new metal-sulfur bonds, and changed the band gap of sphalerite. These alterations influenced the electrokinetic response of sphalerite in flotation conditions, with cobalt-bearing samples having the most notable effect on zeta potential measurements.
MINERALS ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Sirajul Haq, Anum Sarfraz, Farid Menaa, Nadia Shahzad, Salah Ud Din, Hanadi A. A. Almukhlifi, Sohad A. A. Alshareef, Ethar M. M. Al Essa, Muhammad Imran Shahzad
Summary: Nickel oxide-tin oxide nanocomposites synthesized using a leaf extract from Ficus elastica showed promising photocatalytic activity in degrading methyl orange. The nanocomposites were characterized using various techniques including XRD, SEM, EDX, FTIR, and UV-vis DRS. The optimal conditions for efficient photocatalysis were determined to be a calcination temperature of 100°C, catalyst dose of 20 mg, pH of 6, and a concentration of 50 ppm MO.
Article
Materials Science, Textiles
Kexin Peng, Jiankui Guo, Haifeng Chen, Mali Xie, Xi Zhang, Xudong Huang, Guiying Xing, Linjun Shao, Chenze Qi
Summary: In this paper, copper phthalocyanine functionalized polystyrene superfine fibers with excellent photocatalytic performance were prepared using electrospinning technology. The effects of different factors on the photodegradation of methyl orange were studied, and the fibers showed high efficiency in the degradation process.
FIBERS AND POLYMERS
(2023)
Article
Chemistry, Physical
Tsung-Mo Tien, Chao-Hsiang Chen, Chen-Tang Huang, Edward L. Chen
Summary: In this work, a new binary MoS2/Co3O4 nanohybrids with excellent photocatalytic performance and stability was successfully fabricated. The enhanced photocatalytic degradation and redox activities can be attributed to the created S-scheme heterostructure to facilitate the separation of and to delay recombination of photoinduced charge carriers. This strategy of exploiting nanohybrid photocatalysts has great potential in the field of environmental catalysis and diverse applications.
Article
Acoustics
Yadnesh Kesari, Prasad Deshpande, Geeta Sharma, Anjali Athawale
Summary: Ultrasound assisted methods have become environmentally friendly and cost-effective technologies for chemical synthesis. This study investigates the impact of ultrasound treatment on the optical and morphological properties of methyl ammonium lead iodide and zinc oxide compounds, and characterizes the products using various analytical techniques.
Article
Chemistry, Physical
Shuolin Zhou, Junzhuo Bai, Keying Huang, Xinlu Ye, Yingqing Peng, Min Lei
Summary: Developing a rapid and reliable method for measuring the photoreactivity of TiO2 pigments is of great importance for industrial application. In this study, the photoactivity of industrial TiO2 pigments was evaluated through the photodegradation of methyl orange (MO). The results showed that anatase TiO2 pigment accelerated MO degradation, while rutile pigment acted as a stabilizer and effective UV absorber to slow down the degradation. Additionally, the mechanism of MO degradation was elucidated through the analysis of degradation intermediates and calculated data.
Article
Biotechnology & Applied Microbiology
Sana Z. M. Murtaza, Reem Shomal, Rana Sabouni, Mehdi Ghommem
Summary: Pharmaceuticals and dyes are known to have endocrine disrupting effects and can contaminate water supplies. By incorporating TiO2 and ZnO nanoparticles into MOF material MIL-53(Al), effective photocatalysts were developed for the degradation of these pollutants, showing high degradation efficiency and recyclability.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Biochemistry & Molecular Biology
Myroslav Sprynskyy, Paulina Szczyglewska, Izabela Wojtczak, Izabela Nowak, Andrzej Witkowski, Boguslaw Buszewski, Agnieszka Feliczak-Guzik
Summary: A new catalyst based on biosilica doped with palladium(II) chloride nanoparticles was prepared and tested for efficient degradation of methyl orange in water solution under UV light excitation. The photocatalyst exhibited excellent photodegradation activity toward MO degradation under UV light irradiation, showing rapid photocatalytic degradation within one minute with an efficiency reaching over 98% after 75 min. The proposed mechanism of photodegradation involves the generation of strongly oxidizing species such as HO· and O2·- radicals from diatom biosilica under the influence of UV light excitation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
