Article
Optics
Hicham Es-soufi, Hssain Bih, M. I. Sayyed, Lahcen Bih
Summary: The melt-quenching route was utilized to produce phosphate glasses in the system of 20Na2O-(50-x) Na2WO4-30P2O5: xTiO2 with 0 <= x <= 25 mol%. Various characterization techniques were employed to investigate the influence of TiO2 on the physical-optical parameters of the synthesized glasses. It was found that as the TiO2 content increased, the density values decreased, while the optical band gap (Eg) decreased and Urbach energy (Delta E) increased. The placement of TiO2 in glasses was related to the creation of non-bridging oxygens. Moreover, an increase in TiO2 mol percent resulted in a decrease in optical basicity, electronic polarizability, optical electronegativity, and the electronic polarizability, as well as an increase in refractive index, dielectric constant, and optical dielectric constant.
Article
Engineering, Electrical & Electronic
Mehmet Isik, Serdar Delice, Nizami Gasanly
Summary: In this study, the temperature-dependent band gap energy of anatase TiO2 nanoparticles was investigated comprehensively for the first time using transmission measurements in the range of 10-300 K. X-ray diffraction pattern exhibited nine peaks related to tetragonal crystal structure. Scanning electron microscope image showed that the nanoparticles with the dimensions of 25-50 nm were found as micrometer sized agglomerated. The analysis of the transmission measurements revealed a decrease in the band gap energy from 3.29(5) to 3.26(6) eV as the temperature was increased from 10 to 300 K. The temperature-band gap dependence was analyzed using Varshni and O'Donnell-Chen optical models and optical parameters of the TiO2 nanoparticles like absolute zero band gap energy, rate of change of band gap with temperature and average phonon energy were reported.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Liwen Zhu, Xiu Cao, Jianrong Xiao, Songshan Ma, Shiwo Ta
Summary: The study showed that TiO2/Cu3N composite films have higher photocatalytic activity in degradation compared to pure TiO2 film, mainly due to the addition of Cu3N promoting the catalytic activity of TiO2. The composite films exhibit excellent photocatalytic performance and have potential application prospects in wastewater treatment.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
H. Aghababaei, A. Faeghinia, F. Soleimani
Summary: The P2O5-TiO2-CaO system was studied as a suitable host for rare-earth ions. Glasses doped with neodymium showed an increase in absorbance and a decrease in emission intensity, indicating a change in optical properties. The addition of Nd also led to a decrease in direct optical band gap energy and an increase in Urbach energy.
Article
Materials Science, Multidisciplinary
E. R. Silva-Osuna, A. R. Vilchis-Nestor, R. C. Villarreal-Sanchez, A. Castro-Beltran, P. A. Luque
Summary: This study synthesized titanium oxide nanoparticles using Salvia rosmarinus extract and investigated their optical properties and photocatalytic activity. The results showed that increasing the concentration of the extract resulted in a decrease in the band gap values of the nanoparticles, leading to enhanced photocatalytic activity.
Article
Chemistry, Inorganic & Nuclear
S. S. Fouad, Eszter Baradacs, M. Nabil, Bence Parditka, S. Negm, Zoltan Erdelyi
Summary: In this study, a comparative analysis of TiO2/Cu/TiO2 thin films with different Cu interlayer thickness was conducted. The results showed that increasing the Cu interlayer thickness can enhance the photocatalytic activity and reduce the indirect optical band gap energy, making the films more efficient in absorbing visible light.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Stacy A. Lynrah, Pheiroijam Pooja, P. Chinnamuthu
Summary: Heterostructure MnO2/TiO2 thin film (TF) and nanowires (NW) were fabricated using Glancing angle deposition technique. The NWs showed a 15-fold enhancement in UV-Vis absorption and better noise performance compared to TF, with faster rise and fall time. This indicates great potential for NWs in applications of UV-Vis range photodetectors.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
M-B Bouzouraa, A. En Naciri, Y. Battie, S. Dalmasso, S. Diliberto, A. Bouche, N. Chaoui
Summary: This study investigated the effects of nitrogen N+2 ion beam on TiO2 thin films using various techniques such as Raman spectroscopy, grazing incidence X-ray diffractometer (GIXRD), X-ray photoelectron spectroscopy (XPS), spectroscopic ellipsometry (SE), atomic force microscopy (AFM), and photoluminescence spectroscopy (PL). The results showed significant changes in the physical properties of TiO2 after exposure to the N+2 ion beam.
Article
Materials Science, Multidisciplinary
Muhammad Saqib, Nasir Rahman, Kashif Safeen, Saleh D. Mekkey, Mohamed A. Salem, Akif Safeen, Mudasser Husain, Shams u Zaman, Sherzod Abdullaev, Azra Kalsoom, Zeinhom M. El-Bahy, Rajwali Khan
Summary: The authors propose a method to enhance the photodegradation properties of TiO2 nanoparticles by doping them with cobalt and sulfur. The doped TiO2 nanoparticles show significantly improved photoactivity compared to pure TiO2. The study explores the physical mechanisms behind this enhancement and demonstrates the potential for large-scale nanoparticle production for industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Shashi Pandey, Alok Shukla, Anurag Tripathi
Summary: This study compares the electrical and optical properties of powder and pellet forms of 3d-doped TiO2. It is observed that both properties change significantly due to external pressure. The experimental band gap obtained from optical absorption spectroscopy is verified through rigorous theoretical calculations. Doping and pressure variation affect the band gap and electrical resistivity.
Article
Chemistry, Physical
H. Joshi, R. K. Thapa, Amel Laref, Worasak Sukkabot, Lalrinthara Pachuau, Lalmuanpuia Vanchhawng, P. Grima-Gallardo, M. Musa H-E Saad, D. P. Rai
Summary: First Principles calculations were performed on CsPbBr3 to investigate its elastic, electronic and optoelectronic properties. The results show that the calculated energy bandgap is similar to experimentally measured values and the optical spectra exhibit high absorption coefficients in the range of 3-6 eV.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Monica A. Vargas-Urbano, Lorena Marin, Winny Monica Castillo, Luis Alfredo Rodriguez, Cesar Magen, Milton Manotas-Albor, Jesus Evelio Diosa, Katherine Gross
Summary: High-purity TiO2 and CuO powders were synthesized using the Pechini method, showing high reproducibility of the anatase and tenorite phase. The powders were confirmed to be pure through various experimental techniques. The CuO system displayed high absorbance percentages throughout the visible light spectrum, making it a promising material for solar cell applications.
Article
Optics
Dalal Abdullah Aloraini, Ashok Kumar, Aljawhara H. Almuqrin, M. Sayyed
Summary: The addition of BaO affects the optical and gamma ray shielding characteristics of the glasses, leading to an increase in optical band gap energy and a decrease in refractive index. The molar refractivity and molar electronic polarizability decrease with the substitution of BaO. The results indicate that increasing the BaO content in the glass system results in more desirable radiation shielding properties.
Article
Materials Science, Multidisciplinary
Muhammad Yaseen, Mehwish Khalid Butt, Amna Ashfaq, Javed Iqbal, Maha M. Almoneef, Misbah, Munawar Iqbal, Adil Murtaza, A. Laref
Summary: In this study, the influence of pressure on the electronic, thermoelectric, and optical properties of cubic KNbO3 was investigated using density functional theory. The results show that the band gap and optical characteristics of KNbO3 change with pressure, and it also exhibits potential applications in thermoelectric performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Naushad Ahmad, Nagih M. Shaalan, Rajesh Kumar, Adil Alshoaibi, Nishat Arshi, Saurabh Dalela, Mohammed Albossed, Keun Hwa Chae, Parvez Ahmad Alvi, Kavita Kumari
Summary: BiFe1-xCrxO3, (0 <= x <= 10) nanoparticles were prepared and characterized. The substitution of Cr in the nanoparticles significantly influenced their structural, morphological, optical, magnetic, and electrochemical properties.
Article
Physics, Applied
S. Varaprasad, K. Thyagarajan, Y. Markandeya, K. Suresh, G. Bhikshamaiah
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2019)
Article
Materials Science, Multidisciplinary
G. Neelima, Venkata Krishnaiah Kummara, N. Ravi, K. Suresh, Sk. Nayab Rasool, K. Tyagarajan, T. Jayachandra Prasad
MATERIALS RESEARCH BULLETIN
(2019)
Article
Engineering, Aerospace
S. Eswaraiah, M. Venkat Ratnam, Yong Ha Kim, Kondapalli Niranjan Kumar, G. Venkata Chalapathi, L. Ramanajaneyulu, Jaewook Lee, P. Vishnu Prasanth, K. Thyagarajan, S. V. B. Rao
ADVANCES IN SPACE RESEARCH
(2019)
Article
Geochemistry & Geophysics
S. Eswaraiah, Kondapalli Niranjan Kumar, Yong Ha Kim, G. Venkata Chalapathi, Wonseok Lee, Guoying Jiang, Chunxiao Yan, Guotao Yang, M. Venkat Ratnam, P. Vishnu Prasanth, S. V. B. Rao, K. Thyagarajan
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
(2020)
Article
Crystallography
Srihasam Saiganesh, Thyagarajan Krishnan, Golla Narasimha, Hesham S. Almoallim, Sulaiman Ali Alhari, Lebaka Veeranjaneya Reddy, Koduru Mallikarjuna, Arifullah Mohammed, Vattikuti S. V. Prabhakar
Summary: The study systematically fabricated La-doped NiO nanoparticles using Sesbania grandiflora broth, and investigated their optical properties, structure, and antibacterial action. The optimized compound NiOLa-04 showed superior antibacterial activity compared to other prepared compounds. This study represents the first report on the phytosynthetic fabrication of rare-earth ion La3+-doped NiO nanoparticles and their antimicrobial studies.
Article
Chemistry, Physical
Dadamiah P. M. D. Shaik, M. V. Sasi Kumar, P. Naresh Kumar Reddy, O. M. Hussain
Summary: Manganese and cobalt oxide nanocrystals were synthesized via a simple and low-cost combustion method, with detailed studies on their structural, optical, magnetic, and electrochemical properties. The Mn3O4 nanocrystals exhibited excellent performance in electrochemical capacitors, while the poor electrochemical behavior of Co3O4 suggests that Mn3O4 nanocrystals are superior electrode materials.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
P. Naresh Kumar Reddy, Dadamiah P. M. D. Shaik, Vattikondala Ganesh, D. Nagamalleswari, K. Thyagarajan, P. Vishnu Prasanth
Summary: The synthesis of 3D flower-like TiO2 nanoparticles through a green approach showed better electrochemical performance in aqueous electrolyte at 10 hours reaction time in 1M Na2SO4 due to its delightful structural morphology.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Dadamiah P. M. D. Shaik, P. Rosaiah, P. Naresh Kumar Reddy, D. Nagamalleswari, Mohamed Ouladsmane, O. M. Hussain
Summary: This study demonstrates the fabrication of 3D flower-shaped C/Mn3O4 thin film electrodes on ATS substrates using electron beam evaporation technique. The fabricated electrodes exhibit excellent performance in supercapacitors, including high cycling stability and reversible capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Munaga Venkata Veera Prasad, Krishnan Thyagarajan, Borra Rajesh Kumar
SN APPLIED SCIENCES
(2020)
Article
Engineering, Chemical
Siva Kumar Pendyala, K. Thyagarajan, A. Gurusampath Kumar, L. Obulapathi
JOURNAL OF MICROWAVE POWER AND ELECTROMAGNETIC ENERGY
(2019)