Article
Energy & Fuels
Ioana Tismanar, Alexandru Cosmin Obreja, Octavian Buiu, Anca Duta
Summary: This research reports on the fabrication of visible and solar-active photocatalytic bi-layered films, and the testing of their crystallinity degree, surface morphology, and elemental composition. The results showed that increasing the filler content can improve the process efficiency at high irradiance values, but the increase in photocatalytic efficiencies is limited due to electron-hole recombination. The thin films also demonstrated good stability in aqueous medium.
Article
Energy & Fuels
Yue Zhao, Lixia Sang, Chong Wang
Summary: In this study, an Au-rGO/TiO2 photoelectrode was fabricated by loading Au nanoparticles and rGO onto TiO2 nanoring-nanotube arrays. The temperature field of Au nanoparticles was simulated and calculated using COMSOL Multiphysics, and the obtained data was further predicted using an artificial neural network model. The predicted results were consistent with the measured temperature rises of the reaction system.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Ioana Tismanar, Alexandru Cosmin Obreja, Octavian Buiu, Anca Duta
Summary: This study presents a novel method for depositing VIS-active composite photocatalytic thin films based on TiO2 and GO, combining two up-scalable techniques. The effects of composite film stability, morphology, and crystallinity on photocatalytic efficiency were investigated, showing that roughness and crystallinity play key roles in determining efficiency. The thin films demonstrated good stability in aqueous pollutant environments, with no wash-out effect observed in experimental results.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Zihan Zhang, Ping Lu, Zixing Gu, Qiang Ma, Zhizhong Guo, Huaneng Su, Qian Xu
Summary: Cu2O is introduced to the surface of TiO2 photoelectrode to improve battery performance. The successful deposition of Cu2O on the surface of TiO2 photoelectrode is confirmed, and Cu2O enhances and broadens the absorption and utilization of UV range sunlight by the TiO2 photoelectrode. Electrochemical test results show that the Cu2O-TiO2 photoelectrode possesses a higher carrier concentration under illumination conditions.
Article
Chemistry, Multidisciplinary
Han Xue, Haomin Liu, Viktoriia Mishukova, Bo Xu, Jiantong Li
Summary: A new type of wave energy generator based on graphene/TiO2 nanoparticle composite films has been fabricated, showing a facile fabrication method and high output power.
NANOSCALE ADVANCES
(2022)
Article
Engineering, Electrical & Electronic
Varishetty Madhu Mohan, Kenji Murakam, Madhavi Jonnalagadda, V. R. Machavaram
Summary: Pure TiO2 and surface-modified TiO2 films were developed using spray pyrolysis technique, with similar crystal structure and optical absorption properties. However, the addition of ZnO layer in SMT films increased impedance and hindered reverse electron transmission. Thus, the efficiency of DSSCs improved from 8.25% to 9.3%.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Siti Nur Azella Zaine, Norani Muti Mohamed, Mehboob Khatani, Muhammad Umair Shahid
Summary: The study focuses on improving the performance of dye-sensitized solar cells (DSC) through the integration of quantum dot (QD) TiO2, which enhances dye absorption capability, reduces electron recombination rate, and improves the electron trapping/de-trapping process.
Article
Chemistry, Physical
Dapeng Cao, Anchen Wang, Xiaohui Yu, Huiming Yin, Jingbo Zhang, Baoxiu Mi, Zhiqiang Gao
Summary: The study demonstrated that the use of compression and graphene incorporation in TiO2/graphene photoanodes for DSSCs significantly improves power conversion efficiency, transmittance, and resistance to cracking, making it suitable for use as the front unit in tandem solar cells.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
T. M. W. J. Bandara, H. M. N. Wickramasinghe, K. Wijayaratne, L. Ajith DeSilva, A. A. Perera
Summary: Dye-sensitized solar cells (DSCs) have been developed as a low-cost alternative for energy conversion devices, with a focus on reducing the use of expensive platinum. This study investigated new composite counter electrodes based on graphite and TiO2 nanoparticles, showing that the highest solar cell performance was achieved with an 80 wt% graphite and 20 wt% TiO2 composition.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Energy & Fuels
Hsueh-Tao Chou, Shi-Ting Chen, Chun-Hsin Wang, Ho-Chun Hsu, Tin-Yao Kao, Zi-Heng Lin
Summary: In this study, the working electrode of DSSCs was successfully modified using a TTG stacked structure, resulting in an efficiency 46.25% higher than that of the pure TiO2 working electrode.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Article
Chemistry, Physical
G. Nagaraj, Mustafa K. A. Mohammed, Masoud Shekargoftar, P. Sasikumar, P. Sakthivel, G. Ravi, M. Dehghanipour, Seckin Akin, Ahmed Esmail Shalan
Summary: This study introduces a method of using graphene quantum dots to modify the SnO2/ZnO layer to enhance the performance of perovskite solar cells, significantly improving opto-electronic properties and increasing power conversion efficiency. Devices with the modified electron transport layer show higher open-circuit voltage and long-term stability.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Physical
Xin Li, Ying Li, Haijun Wang, Hongyan Miao, Haiyan Zhu, Xuefeng Liu, Haibo Lin, Gang Shi
Summary: The Si/TiO2/MoS2 photoelectrode with 3D bionic structure has been fabricated to enhance stability and photocurrent density, reduce reflectance, and improve carrier separation and transport, thus improving the photoelectrochemical performance of the photoelectrode.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Environmental Sciences
Muhammad Umair Shahid, Norani Muti Mohamed, Ali Samer Muhsan, Siti Nur Azella Zaine, Mehboob Khatani, Asfand Yar, Waqar Ahmad, Muhammad Babar Hussain, Asma A. Alothman, Mohammed Sheikh Saleh Mushab
Summary: Dye-sensitized solar cells (DSSCs) have attracted attention for their low-cost processing, ability to work in diffuse light, and potential for building integrated photovoltaics (BIPV). However, their efficiency is low due to multiple issues. This study introduces a graphene/TiO2 scattering layer that enhances electron transport and light scattering. Results show that with 0.01 wt% graphene, a 33% higher photoconversion efficiency (PCE) was achieved compared to without scattering layer. However, PCE decreases at >0.01 wt% graphene due to loss of diffuse reflectance and higher optical absorption.
Article
Chemistry, Physical
Rohit Patil, Yogesh Khollam, Aniket Kadam, Bhaurao Bond, Revati Potdar, Baliram Nadekar, Umesh T. Nakate, Shoyebmohamad F. Shiakh, Pravin S. More
Summary: This study investigates the synthesis and characterization of cadmium sulfide (CdS) and graphene oxide (GO) composite films, which show promising optical and electric properties for solar cell applications. The composite films exhibit enhanced optical properties compared to pure CdS films, indicating their potential for use in solar cell applications. The spray deposition method used in this study offers a simple and cost-effective way to prepare large-area films for practical applications.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Maria Elena Sanchez Vergara, Rafael Imanol Zubillaga Serrano, Leon Hamui, Jose Miguel Galvan Hidalgo, Ismael Cosme, Elizabeth Gomez
Summary: Enhanced transparency, optical, and electrical behavior of hybrid films for organic solar cells were achieved by introducing graphene and an electron transport layer BPhen, resulting in improved current density values and stability under illuminated conditions. However, the electrical behavior degraded over time due to device films and interface degradation after 4 hours.
FRONTIERS IN MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Parsaoran Siahaan, Nurwarrohman Andre Sasongko, Retno Ariadi Lusiana, Vivitri Dewi Prasasty, Muhamad Abdulkadir Martoprawiro
Summary: The study investigated the interaction of chitosan dimer with urea and creatinine using DFT, revealing that creatinine easily binds to chitosan and transports electrons more efficiently than urea due to stronger hydrogen bond interaction. This suggests that creatinine can be transported more effectively through the chitosan membrane during hemodialysis process.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Chemical
Suci Zulaikha Hildayani, Muhamad Abdulkadir Martoprawiro, Yana Maolana Syah
Summary: Flavanones, a type of flavonoid compound, are widely used as precursors in drug discovery. The conversion of chalcone to flavanone can be catalyzed by bronsted acid, with the rate determining step identified as tautomerization. The study also investigated the effect of solvent on the reaction energy profile using computational modeling.
BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Hendro Juwono, Anas F. Imron, Nanik I. Oktavianti, Atthar L. Ivansyah, Yuly Kusumawati
Summary: The study found that acetic acid adsorption on the ZnO surface was the most favorable, while the insertion of V atom into the ZnO surface caused a more negative adsorption energy. The charge transfer between acetic acid and the ZnO or V-ZnO surface was found to be highest, indicating the important role of acetic acid adsorption in the esterification reaction.
MONATSHEFTE FUR CHEMIE
(2022)
Article
Green & Sustainable Science & Technology
Hellna Tehubijuluw, Riki Subagyo, Yuly Kusumawati, Didik Prasetyoko
Summary: Photocatalytic degradation of Methylene Blue by zinc oxide/zeolite socony mobile-5 composites was investigated. ZSM-5 and ZnO/ZSM-5 materials have cubic microcrystallite morphologies. The presence of ZnO in ZSM-5 resulted in a decrease in surface area and pore size. Optimal photocatalytic degradation was observed at a ZnO loading of 34% w/w.
SUSTAINABLE ENVIRONMENT RESEARCH
(2022)
Review
Multidisciplinary Sciences
Yuly Kusumawati, Aulia S. Hutama, Diana Wellia, Riki Subagyo
Summary: The development of dye-sensitized solar cells (DSSCs) has been ongoing for over 30 years, resulting in valuable insights into cell performance and inspiring the development of other solar cell technologies. Modification of each component of DSSCs is essential for achieving high power conversion efficiency, with efforts also focused on reducing production costs. Utilizing natural resources for DSSC components not only offers a sustainable solution but also aims to increase the value of the resources themselves.
Article
Multidisciplinary Sciences
Yuly Kusumawati, Athar L. Ivansyah, Badrut T. Ali, Kiki A. Kurnia, Aulia S. Hutama, Hamzah Fansuri
Summary: In this study, the photophysical properties of various types of ionic liquid cations (ILCs) were investigated computationally. The results showed that ILCs with long-chain branches exhibited fluorescence spectra in the visible range, while five-membered and six-membered ring cations showed phosphorescence spectra in the visible and near-infrared range, respectively.
Article
Materials Science, Multidisciplinary
Riki Subagyo, Arramel, Lina Jaya Diguna, Atthar Luqman Ivansyah, Marcin Eugeniusz Witkowski, Michal Makowski, Dominik Kowal, Winicjusz Drozdowski, Muhammad Danang Birowosuto, Yuly Kusumawati
Summary: This study investigates the scintillation performance of perovskite materials and discovers the phenomena of thermal quenching and trap states.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Nanik Ismi Oktavianti, Garcelina Rizky Anindika, Atthar Luqman Ivansyah, Yuly Kusumawati
Summary: This study investigated the adsorption of methylene blue and methyl orange on ZnO and nickel-doped ZnO clusters through density functional theory. The results showed that nickel doping can decrease the bandgap, promising to shift the UV source to the visible range in the photocatalytic process, bringing more benefits.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Badrut Tamam Ibnu Ali, Nurul Widiastuti, Yuly Kusumawati, Atthar Luqman Ivansyah, Juhana Jaafar
Summary: The selection of solvent greatly influences the characteristics of membrane preparation. Using a computational approach, solvents can be selected based on the solvation energy value, providing the advantage of no organic waste generation. In this study, the optimization of PET structure was conducted using a computational approach, and the PET obtained from plastic bottle waste was validated against experimental results. The best solvent for dissolving PET waste was determined using a conductor-like polarizable continuum model. The results showed that the computational and experimental spectra were not significantly different, and phenol was found to be the most effective solvent for PET plastic bottle waste dissolution.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Physical
Leo Saputra, Arifin, Nunik Gustini, Novitasari Sinambela, Nova Pratiwi Indriyani, Aditya Wibawa Sakti, Ubed Sonai Fahruddin Arrozi, Muhamad A. Martoprawiro, Aep Patah, Yessi Permana
Summary: Acetonitrile has been found to have a new function in nickel-catalyzed reactions, where it acts not only as a coordinating solvent but also as a ligand, enhancing the stereoselective isomerization reactions.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
T. R. Alkas, A. S. Purnomo, A. N. Pratiwi, Y. Nurwijayanti, R. Ediati, T. Ersam, Y. Kusumawati
Summary: In this study, new composites were fabricated from brown rot fungus (BRF) and MOF UiO-6 6 immobilized in polyvinyl alcohol and sodium alginate (PVA-SA) matrix to degrade harmful dyes. The results showed that the composites had better degradation effect compared to pure cultures, indicating their potential for dye degradation.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Riki Subagyo, Azis Yudhowijoyo, Novia Amalia Sholeha, Sutrisno Salomo Hutagalung, Didik Prasetyoko, Muhammad Danang Birowosuto, Arramel Arramel, Jizhou Jiang, Yuly Kusumawati
Summary: Tricobalt tetroxide (Co3O4) has shown promising potential as a photocatalyst material, but its photocatalytic performance is hindered by the rapid recombination process of photogenerated charge carriers. Various modifications, such as doping elements, support materials, and combination with other semiconductors, have been developed to enhance its photocatalytic activity by decreasing the recombination process and improving charge carrier separation. This work reviews recent modifications of Co3O4 and their effects on its photocatalytic performance, as well as the mechanisms behind these modifications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Chemical
Aulia Dewi Rosanti, Fahmi Hidayat, Yuly Kusumawati, Arif Fadlan, Rizky Arief Shobirin, Fanni Kurnia Wijaya
Summary: This study investigates the adsorption of methyl orange (MO) on Medan orange peel modified with cetyltrimethylammonium bromide (CTAB) and its effect on zinc oxide (ZnO) characteristics. The results show that the calcination temperature significantly affects the morphology, crystal structure, and degradation efficiency of MO for ZnO/Mopl-CTAB materials.
BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS
(2023)
Article
Chemistry, Inorganic & Nuclear
A. W. Nugraha, I. S. Jahro, D. Onggo, M. A. Martoprawiro
Summary: The computational study investigates the structure changes, ST temperature, and ST pattern determination of the Fe(II)-Htrz complex in HS and LS states using a hybrid functional and basis set. The results show that the distance between Fe(II) ions is shorter in the LS state and the Fe-N bond length is shorter in the HS state. The ST temperature results are 342 and 348 K for the second and third models, respectively, with a slow ST pattern.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
E. Santoso, R. Ediati, Y. Kusumawati, H. Bahruji, D. O. Sulistiono, D. Prasetyoko
MATERIALS TODAY CHEMISTRY
(2020)