Article
Energy & Fuels
Liyan Ming, Chunling Wang, Yun Hang Hu
Summary: This study presents a rare earth POM-based photocatalyst CePMo/TiO2 for efficient conversion of methane into organic oxygenates. CePMo/TiO2 exhibits excellent catalytic performance under 1.5G sunlight irradiation and the addition of CePMo enhances the photocatalytic activity of TiO2 for organic oxygenates.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Applied
Miroslava Filip Edelmannova, Martin Reli, Peter Nadrah, Nejc Rozman, Rudolf Ricka, Andrijana Sever Skapin, Miha Nosan, Urska Lavrencic Stangar, Kamila Koci
Summary: This study aims to investigate the correlation between the structural properties of different TiO2 catalysts and their photocatalytic performance and selectivity in CO2 reduction at different pH levels. Two types of TiO2 catalysts were prepared and extensively characterized using various techniques. The prepared catalysts exhibited higher selectivity in CO2 reduction compared to a commercial P25 catalyst. The TiSG catalyst, which had the lowest portion of hydroxyl oxygen species, showed the highest photoreduction efficiency. The study also explored the effect of pH on the efficiency and selectivity of photocatalytic CO2 reduction, revealing different product distributions in acidic and basic environments.
Article
Chemistry, Multidisciplinary
Byoung-Hoon Lee, Eunhee Gong, Minho Kim, Sunghak Park, Hye Rim Kim, Junho Lee, Euiyeon Jung, Chan Woo Lee, Jinsol Bok, Yoon Jung, Young Seong Kim, Kug-Seung Lee, Sung-Pyo Cho, Jin-Woo Jung, Chang-Hee Cho, Sebastien Lebegue, Ki Tae Nam, Hyungjun Kim, Su-Il In, Taeghwan Hyeon
Summary: This study investigates the impact of transition metal single atoms on CO2 photoreduction on TiO2 photocatalysts, using a combination of material design, spectroscopic analyses, and theoretical studies. It was found that the electronic interaction between single Cu atoms and TiO2 affects the reducibility of the surface, leading to spontaneous formation of O vacancies near Cu atoms, which cooperatively stabilize CO2 intermediates. Optimized Cu-1/TiO2 photocatalysts exhibit a 66-fold enhancement in CO2 photoreduction performance compared to pristine TiO2, showing the importance of uniform distribution of single atoms in enhancing photocatalytic processes.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Applied
Insaf Abdouli, Marion Eternot, Frederic Dappozze, Chantal Guillard, Nadine Essayem
Summary: The study compared the efficiency of photocatalytic conversion and hydrothermal conversion of glucose, finding that both processes were equally effective on TiO2, with the photocatalytic process having the potential for milder experimental conditions.
Article
Nanoscience & Nanotechnology
Jiwu Zhao, Qiuying Huang, Zidong Xie, Yuan Liu, Fengkai Liu, Fen Wei, Sibo Wang, Zizhong Zhang, Rusheng Yuan, Kaifeng Wu, Zhengxin Ding, Jinlin Long
Summary: Light-driven valorization conversion of CO2 is an encouraging carbon-negative pathway that shifts energy-reliance from fossil fuels to renewables. A hierarchical urchin-like hollow-TiO2@CdS/ZnS (HTO@CdS/ZnS) Z-scheme hybrid with excellent photocatalytic CO2-to-CO activity was synthesized. This study provides insights for constructing diverse heterostructures for the storage and conversion of renewables and chemicals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Umer Younas, Awais Ahmad, Aftab Islam, Faisal Ali, Muhammad Pervaiz, Aimon Saleem, Muhammad Waseem, Ahmed Muteb Aljuwayid, Mohamed A. Habila, Salman Raza Naqvi
Summary: In this study, a WO3/TiO2/V2O5 catalyst was synthesized and characterized for the degradation of O-NP, MB, and MO pollutants. The results showed that the synthesized nanocomposite exhibited excellent photocatalytic potential, with degradation rates of up to 76%, 86%, and 86% for MB, MO, and O-NP, respectively.
Article
Materials Science, Ceramics
N. K. A. Hamed, M. K. Ahmad, N. H. H. Hairom, A. B. Faridah, M. H. Mamat, A. Mohamed, A. B. Suriani, C. F. Soon, F. I. M. Fazli, S. M. Mokhtar, M. Shimomura
Summary: This study investigates the photocatalytic degradation of methylene blue using flowerlike rutile-phase TiO2 films synthesized by a hydrothermal method. The research reveals that various parameters such as catalyst morphology, oxygen vacancy/Ti3+ surface defects, pH of the methylene blue solution, and initial concentration of the dye influence the photocatalytic activity of the TiO2 film. The presence of oxygen vacancy/Ti3+ surface defects is found to enhance the photocatalytic activity by acting as an electron trap.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Bo Wen, Annabella Selloni
Summary: The study investigates the structure of carboxylic acid-modified TiO2 surfaces in contact with water, using density functional theory and ab initio molecular dynamics. It was found that isolated formic acid molecules adsorbed on the TiO2 surface remained stable, with protons transferred to form surface bridging hydroxyls. Adsorbed monolayers of formic acid molecules in water resulted in a negatively charged surface with solvated H3O+ ions nearby.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Lida Tan, Xianghua Kong, Mingxin Liu, Hui Su, Hong Guo, Chao-Jun Li
Summary: In this report, a method for direct C(sp3)-N bond formation of unactivated alkanes under photocatalytic reaction conditions using a GaN based Mott-Schottky catalyst is reported. The addition of a Pd co-catalyst significantly enhances the reaction efficiency.
Article
Chemistry, Multidisciplinary
Lida Tan, Xianghua Kong, Mingxin Liu, Hui Su, Hong Guo, Chao-Jun Li
Summary: This study reports the direct C(sp3)-N bond formation of unactivated alkanes using a GaN based Mott-Schottky catalyst under photocatalytic reaction conditions. The photocatalyst shows long term stability and high reaction efficiency (up to 92%), and the reaction efficiency is significantly enhanced by depositing a Pd co-catalyst on the surface of GaN.
Article
Chemistry, Physical
Ahmed F. M. EL-Mahdy, Hossam A. E. Omr, Zeid A. ALOthman, Hyeonseok Lee
Summary: A new ethene-based covalent organic framework (COF) with high selectivity and efficiency for CO2 conversion into methane is reported. It exhibits promising values for CO2 conversion without any co-catalyst support and demonstrates long-term stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Physics, Applied
Kejun Wu, Pankaj Koinkar, Akihiro Furube
Summary: By combining transition metal dichalcogenide WS2 and gold nanoparticles with titanium dioxide, the WS2/TiO2/Au composite showed enhanced photocatalytic performance under visible light, making it suitable for future photocatalytic applications.
MODERN PHYSICS LETTERS B
(2022)
Article
Chemistry, Physical
Min Huang, Shuyi Zhang, Bo Wu, Yao Wei, Xing Yu, Yongping Gan, Tiejun Lin, Fei Yu, Fanfei Sun, Zheng Jiang, Liangshu Zhong
Summary: In this study, a novel Cu and W codoped TiO2 photocatalyst was fabricated to achieve selective photooxidation of methane into oxygenates at ambient temperature, with limited formation of CO2. The Cu-W-TiO2 photocatalyst exhibited high productivity and selectivity, and its improved performance was attributed to the modulation of electronic and band structure, which facilitated methane activation and hindered overoxidation of oxygenates.
Article
Chemistry, Multidisciplinary
Zeineb A. Thiehmed, Talal M. Altahtamouni
Summary: In this study, the effect of KBr salt on the growth of TiO2 nanorods was investigated. The addition of KBr with different concentrations controlled the growth of TiO2 nanorods, with KBr molecules suppressing lateral growth and allowing for axial growth. This impacted the morphology and internal surface area of the nanorods.
Article
Chemistry, Applied
Marie Duflot, Clement Marchal, Valerie Caps, Vincent Artero, Konstantinos Christoforidis, Valerie Keller
Summary: Here, we optimized NH2-UiO-66/TiO2/Au (ca. 1.5 wt%) composite photocatalysts for gas phase CO2 photocatalytic reduction with water as reducing agent by adjusting NH2-UiO-66/TiO2 ratio and pH during synthesis. It was found that the 10 wt% NH2-UiO-66/TiO2/Au (at pH=7) composite showed the highest cumulated CH4 production rate of 136 mu mol/gcatalyst with 70% electronic selectivity over a 5-hour continuous test. This composite achieved the best compromise between MOF surface area, CO2 adsorption sites, visible light absorption capacity, and a large interface contact area, which facilitated efficient charge carrier transfer from metal(Zr) to metal(Ti). Au deposition by impregnation/chemical reduction was necessary for CO2 photoreduction and may serve as electron traps, co-catalyst, or surface plasmon resonator.
Article
Engineering, Biomedical
Khalid Hussain, Suhaib Ajaz Khan, Mehreen Muzaffar, Zaynab Rashid Khan, Sheikh Umar Farooq
Summary: Early detection of COVID-19 infection is crucial to prevent fatalities. Chest radiography has been proven effective and affordable for detecting the virus. This study evaluates the performance of various CNN architectures on a dataset of 5902 chest X-ray images, and finds that the DenseNet-121 model performs best in terms of accuracy, sensitivity, and specificity.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING-IMAGING AND VISUALIZATION
(2023)
Article
Chemistry, Multidisciplinary
R. Al-Amer, W. Khan, A. Laref, H. R. AlQahtani, G. Murtaza, Q. Mahmood, Fridolin Tchangnwa Nya, Shahariar Chowdhury, Mohammed El Amine Monir, Eman A. Alghamdi, H. M. Huang, Y. C. Xiong, J. T. Yang
Summary: In this study, the effects of compositional doping of Hf on the physical characteristics of the SrFBiS2 compound were investigated. It was found that Hf doping leads to a metallic character and the emergence of a viable superconducting state. The band structures and Fermi surface topologies vary significantly with the concentration of Hf, and optical anisotropy decreases with Hf doping.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Endocrinology & Metabolism
Goran Petrovski, Judith Campbell, Maheen Pasha, Emma Day, Khalid Hussain, Amel Khalifa, Tim van den Heuvel
Summary: This study aimed to compare glucose control in adolescents with type 1 diabetes (T1D) using the MiniMed 780G system who used simplified meal announcement with those who used precise carbohydrate counting. The results showed no significant advantage in blood glucose control for the fixed group using precise carbohydrate counting compared to the flex group. Therefore, simplified meal announcement using the MiniMed 780G system may be a valuable alternative for users who are challenged by precise carbohydrate counting.
Article
Genetics & Heredity
Khalid Hussain, Tasadoq Hussain Jaweed, Avinash C. Kamble
Summary: This study elucidates the role of the phenylpropanoid pathway in resistance expression during compatible and incompatible interactions in pigeon pea. The results show that the increased activity of phenylpropanoid pathway-associated defense enzymes and higher levels of phenolics and lignin are associated with resistance. Additionally, differential expression of lignin biosynthesis genes is important in resistance against wilt.
Article
Materials Science, Multidisciplinary
Muhammad Ikram, Rimsha Raees, Ali Haider, Anwar Ul-Hamid, Junaid Haider, Iram Shahzadi, Walid Nabgan, Souraya Goumri-Said, Mohammed Benali Kanoun, Salamat Ali
Summary: The co-precipitation approach was used to synthesize ternary nanocomposites consisting of Cerium-Ce, Chitosan-CS, and TiO2 quantum dots (QDs). The purpose of this study was to evaluate the antimicrobial and photocatalytic activities of Ce/CS-TiO2. The results showed that the addition of dopants (CS and Ce) decreased the crystallite size of TiO2 and resulted in the formation of quantum dot structures. The Ce/CS-TiO2 nanocomposites exhibited significant antibacterial activity and showed a redshift in absorption spectra, indicating a decrease in band gap energy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Muhammad Khalid Hussain, N. R. Khalid, M. B. Tahir, Muhammad Tanveer, Tahir Iqbal, Maira Liaqat
Summary: A novel ternary ZnO/CuO/MoO3 (ZnO/CuO/M) heterojunction photocatalyst with nanorods morphology was synthesized by hydrothermal treatment. The photocatalytic activity of the ZnO/CuO/M nanorods was significantly improved compared to pristine ZnO, CuO, MoO3, and the binary CuO/M composite. The improved performance can be attributed to the efficient transfer and separation of photoexcited charge carriers in the ZnO/CuO/M heterojunction.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Review
Chemistry, Multidisciplinary
Walid Nabgan, M. Ikram, M. Alhassan, A. H. K. Owgi, Thuan Van Tran, L. Parashuram, A. H. Nordin, Ridha Djellabi, A. A. Jalil, F. Medina, M. L. Nordin
Summary: The consumption of plastic and depletion of fossil fuels are major challenges in the world's environmental and energy issues. Catalytic pyrolysis of plastic waste has emerged as a sustainable approach in the circular economy. This study conducted a bibliometric analysis of research studies on plastic waste pyrolysis and non-precious-based catalysts over the past fifty years, revealing the historical progress and the leading countries in this field.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Afizah Alir, Tuan Amran Tuan Abdullah, Anwar Johari, Mohamed Yusuf Mohamud, Melissa Low Phey Phey, Walid Nabgan, Francisco Medina, Muhammad Ikram
Summary: This study successfully improved the efficiency of catalysts in producing H-2 gas from biomass tar by adding MgO and CaO promoters to a nickel-based catalyst with various oxide supports. This resulted in increased carbon to-gas conversion and H-2 yield, as well as reduced production of undesired byproducts.
Article
Chemistry, Physical
Mohamed Yusuf Mohamud, Tuan Amran Tuan Abdullah, Arshad Ahmad, Muhammad Ikram, Afizah Alir, Melissa Low Phey Phey, Walid Nabgan
Summary: This study aims to develop a dual-functional nanotube-supported CuZnO-PTA catalyst and investigate the effects of the active site mass ratio on CO2 conversion and DME selectivity. The experimental results show that the synthesized CuZn-PTA@HNT bifunctional catalyst exhibits promising CO2 conversion and DME selectivity.
Article
Chemistry, Multidisciplinary
Anum Shahzadi, Sawaira Moeen, Aryan Dilawar Khan, Ali Haider, Junaid Haider, Anwar Ul-Hamid, Walid Nabgan, Iram Shahzadi, Muhammad Ikram, Ali Al-Shanini
Summary: This study successfully synthesized La-doped CeO2 quantum dots with different concentrations (2%, 4%, 6%) using a hydrothermal approach. The structural, elemental, optical, and morphological properties of the dots were analyzed. It was found that La doping suppressed the crystallinity and improved the dispersion of CeO2 quantum dots. The dots also exhibited antibacterial activity against Escherichia coli and remarkable photocatalytic degradation of methylene blue.
Article
Materials Science, Multidisciplinary
Muhammad Khalid Hussain, N. R. Khalid, Muhammad Tanveer, T. Iqbal, Maira Liaqat, Sultana Rahman, M. Rafique, Muhammad Imran, Mohammad A. Assiri
Summary: In recent years, semiconductor photocatalysts have been widely used to eliminate emerging wastewater contaminants under visible light. However, the large bandgap energy and fast charge recombination pose challenges in practical applications. This study explores the excellent photocatalytic activity of Co3O4/MoO3 nanocomposites in degrading rhodamine B and alizarin yellow dyes. The p-n heterojunctions formed between p-Co3O4 and n-MoO3 significantly enhance the visible light photocatalytic performance, with 91% RhB removal and 67% AY removal after 120 minutes of visible light exposure.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Basheer Riskhan, Halawati Abd Jalil Safuan, Khalid Hussain, Asma Abbas Hassan Elnour, Abdelzahir Abdelmaboud, Fazlullah Khan, Mahwish Kundi
Summary: Cyberattacks in the modern world are becoming increasingly sophisticated, with DDoS attacks being the most common. Effective approaches, such as traffic shaping and pushback, have been proposed in the distributed setting to mitigate such attacks. This study introduces a heuristic-based technique called SYN Flood Attack Detection and Mitigation Technique (SFaDMT), which demonstrates improved detection of SYN attacks.
Article
Chemistry, Multidisciplinary
Muhammad Ikram, Rizwan Karim, Ali Haider, Anum Shahzadi, Mohammed M. Algaradah, Anwar Ul-Hamid, Walid Nabgan, Ahmed M. Fouda, Salamat Ali
Summary: This research presents a novel synthesis of CeO2 nanostructures doped with a fixed amount of capping agent (PAA) and different concentrations of silver (Ag). The Ag/PAA doped CeO2 demonstrated excellent catalytic and antibacterial efficacy. In particular, the 0.03 concentration of Ag/PAA doped CeO2 showed significant catalytic reduction (98.9%) of rhodamine B dye in an acidic medium and exhibited a substantial inhibition zone (3.75 mm) against Escherichia coli.
Review
Chemistry, Multidisciplinary
Sultana Rahman, Abdul Haleem, Muhammad Siddiq, Muhammad Khalid Hussain, Samina Qamar, Safia Hameed, Muhammad Waris
Summary: The financial progress of a country depends heavily on the energy sector, which is crucial for the growth and development of various industries. The use of renewable resources is essential to overcome the energy crisis and reduce the negative impact of hydrocarbon fuels on the environment. This review focuses on the dyes used in dye-sensitized solar cells (DSSC) and discusses the progress in both inorganic and natural dyes.
Article
Chemistry, Inorganic & Nuclear
Muhammad Abdul Qadeer, Muhammad Khalid Hussain, Muhammad Tanveer, Sumbal Munawar, Ghulam Nabi, A. M. A. Henaish
Summary: Pure-phase BiFeO3 nano-beads were successfully synthesized through a controlled sol-gel extended hydrothermal strategy. The material exhibits outstanding photo-electrochemical properties and low cost, making it a promising candidate for photo-catalytic applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
