Article
Chemistry, Multidisciplinary
Luminita Andronic, Alina Vladescu, Alexandru Enesca
Summary: This study investigated the synthesis, characterization, and photocatalytic activity of TiO2 on the degradation of imidacloprid, as well as the toxicity of TiO2 nanoparticles and imidacloprid on green algae. It was found that TiO2 had low toxicity to the algae, while imidacloprid showed high toxicity levels in low concentrations in an aquatic environment over a long period of time.
Article
Materials Science, Multidisciplinary
Moorthy Padmini, T. Balaganapathi, Periyasamy Thilakan
Summary: Pure rutile phase of TiO2 nanocrystals were synthesized by tuning the chemical process, resulting in stabilized growth with high surface area and mesoporosity upon an increase in calcination temperatures. Photoluminescence and XPS studies revealed interesting findings such as intra-band levels and presence of Ti3+ ions on the highly porous R-TiO2.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Rangaraju Satish Kumar, Jiwon Ryu, Hyorim Kim, Naveen Mergu, Jae-Yeon Park, Hyun-Jin Shin, Min Gu Kim, Seung Geol Lee, Young-A Son
Summary: In this research, a novel panchromatic absorption dimer porphyrin was synthesized and a dimer molecule with maximum absorption in the visible and NIR regions was designed. The photocatalytic disinfection effect of the molecule on gram-negative bacteria Escherichia coli was found to be better than that of bare TiO2, showing potential for future studies.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Roghieh Ahmadiasl, Gholamreza Moussavi, Sakine Shekoohiyan, Fatemeh Razavian
Summary: The light-harvesting ability of titanium oxide (TiO2) was enhanced by copper (Cu) doping, and the degradation of gabapentin (GBP) was used to evaluate its performance under UVA-LED irradiation. The study characterized the morphology and structure of TiO2 and Cu-TiO2 using various analysis techniques, and investigated the degradation mechanism and intermediate generation during the GBP degradation process. The results showed that the Cu-doped TiO2 photocatalyst efficiently degraded and mineralized GBP, demonstrating its potential for pharmaceutical compound degradation.
Article
Chemistry, Multidisciplinary
Md. Kamrul Hossain, Md. Mufazzal Hossain, Shamim Akhtar
Summary: TiO2 and Cr-TiO2 nanoparticles were synthesized using the sol-gel method and were found to have photocatalytic activity for the degradation of p-chlorophenol (PCP) under UV irradiation. The degradation efficiency of PCP was highest at the lowest initial concentration and the optimal conditions for TiO2 and Cr-TiO2 NPs were determined to be a catalyst dosage of 2.0 g/L, acidic pH, and UV irradiation for 90 min. The rate constants for the degradation reaction of PCP were found to be 0.0075 and 0.0122 min-1 for pure TiO2 and Cr-TiO2 NPs, respectively.
Article
Chemistry, Physical
Christopher M. Lew, Cong-Yan Chen, Gary J. Long, Fernande Grandjean, Andrew S. Ichimura, Dan Xie, Nicolas A. Grosso-Giordano, Khetpakorn Chakarawet, Howard S. Lacheen, Kurt O. Jensen, Abraham Martinez, Alexander Katz, Bi-Zeng Zhan, Stacey I. Zones
Summary: The study compared the performance of Fe-SSZ-70 and Al-SSZ-70 in isomerization reactions, with Fe-SSZ-70 showing higher isomerization yield and selectivity due to its weaker acidity.
Article
Chemistry, Multidisciplinary
Suranjan Sikdar, Afroja Banu, Shohini Chakraborty, Nabajyoti Baildya, Sukanta Majumdar
Summary: This study successfully synthesized MgO nanoparticles using an Azadirachta indica leaf extract and magnesium sulphate dihydrate, and investigated their crystallite size, surface morphology, and antibacterial activities. The results showed that the MgO nanoparticles acted as a photocatalyst and enhanced the degradation rate of Methylene Blue when activated by PDS. Density Function Theory calculations provided insights into the degradation mechanism of MB dye, and scavenger quenching experiments confirmed the role of SO4 center dot- radicals in the degradation process. Moreover, the PDS-activated nanoparticles exhibited strong antibacterial activity against Klebsiella sp.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Acoustics
Ananya Dey, Shrivatsa Korde, Parag R. Gogate, Chandrodai Agarkoti
Summary: The treatment of real textile industry effluent using combined advanced oxidation processes, such as photocatalysis, sonocatalysis, sonophotocatalysis, and H2O2 assisted sonophotocatalysis, with Ce-TiO2 nanocatalyst synthesized using a sonochemical co-precipitation method, was studied. The obtained catalyst showed a crystallite size of 1.44 nm and spherical morphology. UV-Vis diffuse reflectance spectra (UV-DRS) analysis revealed a shift of the absorption edge to the visible light range. The effects of different operational parameters, including catalyst dose, temperature, and pH, on COD reduction were investigated. The combined sonophotocatalysis with H2O2 treatment showed the best COD reduction (84.75%), with lower catalyst requirement compared to individual photocatalysis and sonocatalysis.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
P. C. L. Muraro, R. D. Wouters, G. Pavoski, D. C. R. Espinosa, Y. P. M. Ruiz, A. Galembeck, V. C. Rech, W. L. da Silva
Summary: Wastewater pollution by synthetic dyes is a serious environmental problem that requires advanced treatment technologies. This study synthesized silver/titanium nanoparticles using the biosynthesis method from Aloe vera extract and evaluated their photocatalytic activity for the removal of Rhodamine B dye. The results showed that the silver/titanium nanoparticles exhibited promising characteristics for application as a nanocatalyst in the treatment of wastewater with dyes.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Environmental Sciences
Ahmed Massoud, Aly Derbalah, Ibrahim El-Mehasseb, Moustafa Saad Allah, Mohamed S. Ahmed, Ashraf Albrakati, Ehab Kotb Elmahallawy
Summary: The study aimed to fabricate a titanium dioxide nanocatalyst for the removal of insecticides from water, finding that the nano-sized TiO2 catalyst degraded insecticides faster and achieved 100% degradation within 320 minutes. The TiO2 nanocatalyst showed low toxicity in rats and can be a promising technology for complete detoxification of insecticides in water, with further research needed on breakdown products and nanomaterial safety.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Chemistry, Applied
Manuel Robles-Melgarejo, Jaime Espino-Valencia, Reyna Natividad-Rangel, Santiago Jose Guevara-Martinez, Jose Luis Rico-Cerda, Ricardo Rangel-Segura
Summary: Monoliths of TiO2-SiO2 were synthesized using the EISA method and tested in the photocatalytic degradation of 4-chlorophenol. The way of adding the titanium precursor and the calcination conditions were found to be key parameters in determining the physical, morphological, structural, and photocatalytic properties. Different approaches led to materials with different crystal structures, with the best performance achieved after calcination at high temperature under air flow.
JOURNAL OF POROUS MATERIALS
(2021)
Article
Environmental Sciences
Kawsalya Ramasamy, Sarathikannan Dhavamani, Geetha Natesan, Karthik Sengodan, Senthil-Nathan Sengottayan, Manish Tiwari, Sahi Shivendra Vikram, Venkatachalam Perumal
Summary: This study demonstrated the phytofabrication of titanium dioxide nanoparticles wrapped with bioactive molecules, showcasing their applications in photocatalysis and biomedicine. The results highlighted the effective antibacterial and anticancer properties of biomolecule-loaded TiO2NPs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Andre L. da Silva, Fabiane J. Trindade, Jean-Lou Dalmasso, Bruno Ramos, Antonio Carlos S. C. Teixeira, Douglas Gouvea
Summary: This research synthesized TiO2 microspheres using ultrasonic spray pyrolysis, which allowed for continuous production of TiO2 nanocrystals and promoted phase stability and limited particle coarsening. The synthesized porous anatase TiO2 microspheres exhibited superior photocatalytic activity, surpassing the commercial standard TiO2 P25 by approximately 60%.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Xianbo Sun, Weiyu He, Tao Yang, Haodong Ji, Wen Liu, Juying Lei, Yongdi Liu, Zhengqing Cai
Summary: The highly solar active nanocomposite with a sheet-like WO3 skeleton loaded with TiO2 and CQDs showed significantly enhanced photocatalytic activity for antibiotic degradation. The improved charge separation, primarily attributed to the TiO2/WO3 heterojunction and conjugated CQDs, played a key role in the enhanced efficiency. This new composite material has great potential for degrading emerging contaminants in water.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Saqib Khan, Jehanzeb Ali Shah, Nadia Riaz, Tayyab Ashfaq Butt, Asim Jahangir Khan, Walid Khalifa, Hatem Hassin Gasmi, Enamur Rahim Latifee, Muhammad Arshad, Ahmed Abdullah Alawi Al-Naghi, Anwar Ul-Hamid, Muhammad Arshad, Muhammad Bilal
Summary: A photocatalytic system was developed for decolorization of double azo reactive black 5 (RB5) dye and water disinfection of E. coli using Fe-TiO2 photocatalysts synthesized via sol gel method. The efficiency of photocatalytic reaction was greatly influenced by iron loading and calcination temperature. The best photocatalyst showed significant reduction of E. coli and efficient decolorization of RB5.
Article
Chemistry, Analytical
Romeo Villarreal-Morales, Laura Hinojosa-Reyes, Aracely Hernandez-Ramirez, Edgar Ruiz-Ruiz, Maria de Lourdes Maya Trevino, Jorge Luis Guzman-Mar
Summary: In this study, an automated methodology was proposed for the determination of plasticisers in water samples collected from wastewater treatment plants. The methodology combined solid-phase extraction with high-performance liquid chromatography and ultraviolet detection. The selected preconcentration conditions and analysis parameters were optimized. The proposed methodology was successfully applied to detect Bisphenol A and 4-tert-butylphenol in water samples from two wastewater treatment plants.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Roberto Carlos Valerio-Garcia, Iliana E. Medina-Ramirez, Mario A. Arzate-Cardenas, Ana Laura Carbajal-Hernandez
Summary: Safety on the use of magnetic nanomaterials (MNMs) is a key research topic with recent applications in various fields. Toxicity of MNMs depends on factors like size, shape, and surface functionalization. This study found that engineered MNMs-CIT had different impacts on aquatic organisms at various trophic levels, with P. subcapitata being the most sensitive. The research also demonstrated that MNMs can pose hazards on aquatic food webs even at low concentrations.
Article
Immunology
Marina Nayeli Medina-Rosales, Martin Humberto Munoz-Ortega, Mariana Haydee Garcia-Hernandez, Patricia Talamas-Rohana, Iliana Ernestina Medina-Ramirez, Larissa Guadalupe Salas-Moron, Sandra Luz Martinez-Hernandez, Manuel Enrique Avila-Blanco, Beatriz Medina-Rosales, Javier Ventura-Juarez
Summary: The study found that ACh enhances the pathogenicity of E. histolytica by upregulating various virulence factors, enhancing activities like erythrophagocytosis, cytotoxicity, and actin cytoskeleton remodeling, leading to more severe disease conditions.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2021)
Article
Materials Science, Ceramics
J. C. Murillo-Sierra, M. D. L. Maya-Trevino, R. E. Nunez-Salas, D. A. Pino-Sandoval, A. Hernandez-Ramirez
Summary: In this study, ZnS/WO3 coupled photocatalysts were synthesized and showed significantly improved catalytic activity compared to individual semiconductors. The ZnS5%/WO3 photocatalyst achieved complete degradation of SMX in 60 minutes. The enhancement was attributed to the reduced recombination rate.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Diego Alejandro Pino-Sandoval, Laura Hinojosa-Reyes, Jorge Luis Guzman-Mar, Juan Camilo Murillo-Sierra, Aracely Hernandez-Ramirez
Summary: This work evaluated the solar photocatalytic degradation of a drug mixture in different environments and studied the photocatalytic activity of two commercial catalysts. The results showed that solar photocatalysis can effectively degrade the drug mixture under suitable conditions.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Chemistry, Physical
Rafael Hernandez-Tenorio, Aracely Hernandez-Ramirez, Monika Moeder, Jorge Luis Guzman-Mar
Summary: This study investigated the removal of oxcarbazepine from water through photolysis and heterogeneous photocatalysis processes, and monitored the formation of transformation products. The results showed that oxcarbazepine was completely degraded within 30 minutes using both methods.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Spectroscopy
T. Pandiyarajan, R. Mangalaraja, B. Karthikeyan, R. Udayabhaskar, David Contreras, Selene Sepulveda-Guzman, M. A. Gracia-Pinilla
Summary: Rare earth doped ZnO nanostructures were prepared via wet chemical precipitation, showing morphological transitions and unique characteristics. XRD measurements revealed highly crystalline nature and no alteration in crystal structure by RE doping, while Raman spectra exhibited energy shifts and intensity variations. The enhanced photocatalytic activity and different decolorization efficiencies of MB were observed in RE doped ZnO compared to bare ZnO.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biotechnology & Applied Microbiology
Devaraj Manoj, Saravanan Rajendran, F. Gracia, M. Naushad, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: Vitamins are essential for the body's proper functioning, but they must be obtained through food intake. In this study, a mesoporous structure of titanium dioxide with doped zinc oxide nanocrystals on its surface was developed for the simultaneous determination of vitamin B and vitamin C. The mesoporous structure and zinc oxide nanocrystals enhance the diffusion and electron transfer of vitamins, resulting in significantly enhanced electrochemical signal response.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
L. L. Diaz-Munoz, H. E. Reynel-avila, D. I. Mendoza-Castillo, A. Bonilla-Petriciolet, J. Jauregui-Rincon
Summary: This study reports the preparation, evaluation, and comparison of alkaline and acidic heterogeneous carbon-based catalysts in the transesterification of safflower oil with methanol to obtain biodiesel. The catalyst prepared with potassium hydroxide and calcium nitrate showed the highest FAME formation and outperformed other catalysts even after four regeneration-reaction cycles. The best properties of an alkaline catalyst could be associated with its specific surface area and contents of potassium and calcium moieties.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, Mu. Naushad, Madhappan Santhamoorthy, F. Gracia, Matias Soto Moscoso, M. A. Gracia-Pinilla
Summary: In this study, mesoporous copper oxide (CuO) nanocrystals decorated on TiO2 nanostructures were successfully synthesized to form p-n heterojunction nanocomposites. The resulting CuO-TiO2 nanocomposite showed good electrochemical performance on modified GC electrode, enabling efficient oxidation of catechol with wide linear range and excellent sensing properties, capable of detecting catechol in real samples like lake and river water.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, F. Gracia, Sabah Ansar, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: The capacity to generate a constant signal response from an enzyme on an electrode surface has been a fascinating topic of research for the past three decades. The immobilization of dual enzymes on the electrode surface using mesoporous materials allows for high loading of enzymes and provides a protective environment, resulting in long-term stability. The utilization of a redox mediator in second-generation biosensing of hydrogen peroxide improves the selectivity and sensitivity of the sensor.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Laura Yanneth Ramirez-Quintanilla, Diego Pino-Sandoval, Juan Camilo Murillo-Sierra, Jorge Luis Guzman-Mar, Edgar J. Ruiz-Ruiz, Aracely Hernandez-Ramirez
Summary: B-TiO2 photocatalyst with 3 wt.% boron incorporation exhibited the best performance on the degradation and mineralization of estriol. It achieved complete degradation at 300 kJ/m(2) of accumulated energy and 71% of mineralization at 400 kJ/m(2) (2 h), resulting in a non-toxic effluent. The synthesized materials were characterized by various techniques including UV-Vis diffuse reflectance spectroscopy, X-ray diffraction, Raman spectroscopy, Scanning electron microscopy, and X-ray photoelectron spectroscopy.
Article
Chemistry, Multidisciplinary
Luz H. Verastegui-Dominguez, Nora Elizondo-Villarreal, Dora Irma Martinez-Delgado, Miguel Angel Gracia-Pinilla
Summary: In this study, reduced graphene oxide (RGO) was obtained through green synthesis using extracts from Larrea tridentata and Capsicum Chinense. The RGO precursor, synthesized via a modified Hummers' method and reduced using natural extracts, showed a promising potential in photocatalytic degradation of dyes, achieving high degradation efficiencies.
Article
Engineering, Environmental
C. Ashina, N. Pugazhenthiran, P. Sathishkumar, M. Selvaraj, Mohammed A. Assiri, Chandrasekaran Rajasekaran, M. A. Gracia-Pinilla, R. V. Mangalaraja
Summary: In this study, Ni@NiFe2O4/TiO2 magnetic nanocomposites were prepared via a simple sonochemical route, and they showed excellent photocatalytic activity and activation of peroxymonosulphate under direct solar light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Norma A. Ramos-Delgado, Diego A. Pino-Sandoval, Khirbet Lopez-Velazquez, Christos Englezos, Minerva Villanueva-Rodriguezc, Miguel A. Gracia-Pinilla, Nicolas D. Boscher, Han J. G. E. Gardeniers, Arturo Susarrey-Arce
Summary: This study demonstrates the degradation of acetaminophen in water using Fe-BiOBr and solar photo-Fenton process. The results show that Fe-BiOBr is capable of efficiently degrading acetaminophen under mild pH conditions and natural sunlight irradiation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)