Article
Chemistry, Physical
C. Gomez-Polo, S. Larumbe, A. Gil, D. Munoz, L. Rodriguez Fernandez, L. Fernandez Barquin, A. Garcia-Prieto, M. L. Fdez-Gubieda, A. Muela
Summary: The study investigates the effects of Cr and N doping on the properties of TiO2 anatase nanoparticles, including adsorption capacity, photocatalytic performance, and antibacterial response. Doping with Cr and Cr/N enhances adsorption capacity and photocatalytic performance, with Cr-TiO2 nanoparticles exhibiting antibacterial activity under visible light. The differences in electrostatic charge and nanoparticle dispersion are suggested as the main reasons for the varied antibacterial response among the doped nanoparticles.
SURFACES AND INTERFACES
(2021)
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
Materials Science, Multidisciplinary
Sipei Zhang, Ying Xu, Wen Zhang, Peng Cao
Summary: Cu and Y co-doped TiO2 nanoparticles were prepared using an acid-catalytic sol-gel process, resulting in a single anatase phase with reduced crystallite size. SEM observations showed uniform nanospheres being synthesized under the proposed conditions. XPS results demonstrated the presence of Cu+ and Y3+ ions. The photoactivity of the co-doped TiO2 was improved due to effective separation of electron-hole pairs, increased formation of active radicals, and increased surface area.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Applied
Mangesh G. Bhosale, Radhakrishna S. Sutar, Swati S. Londhe, Meghshyam K. Patil
Summary: Ce-doped TiO2 nanoparticles were prepared by the sol-gel method and characterized by various analytical techniques. The study found that increasing the dopant content of cerium in TiO2 improves the properties of the nanoparticles and enhances photocatalytic activity. Furthermore, Ce-doped TiO2 showed efficient degradation of antibacterial agents and mixture of contaminants.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Fahriye Donmez, Nezihe Ayas
Summary: In this study, Ni/TiO2 catalysts were synthesized using the sol-gel technique and characterized through various methods, while the effects of different factors on hydrogen production performance were investigated. It was found that high hydrogen yield and production rate could be achieved under specific reaction conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Ali S. Alkorbi, Hafiz Muhammad Asif Javed, Shahid Hussain, Sana Latif, M. Shabir Mahr, M. Salman Mustafa, Raiedhah Alsaiari, Nabil A. Alhemiary
Summary: The sol-gel method was used to synthesize carbon doped TiO2 nanoparticles with excellent photocatalytic activity. The results showed that optimal doping quantity for maximum photocatalytic degradation of MB was 2 atoms %. Higher doping levels were found to decrease the catalyst's photocatalytic activity.
Article
Chemistry, Multidisciplinary
Sanya Khursheed, Rida Tehreem, Muhammad Awais, Dilshad Hussain, Muhammad Imran Malik, Young Sun Mok, Ghayas Uddin Siddiqui
Summary: The purpose of this study was to investigate the effect of photocatalytic degradation using nitrogen and tungsten co-doped titania (TiO2) nanoparticles, which are cost-effective and environmentally friendly. The synthesized nanoparticles were analyzed using various techniques, including spectroscopy, microscopy, and spectrometry. The co-doping of metal and non-metal enhanced the photocatalytic properties of the TiO2 nanoparticles, particularly in the visible region. This resulted in improved absorption of visible light and reduced recombination of electron-hole pairs, leading to accelerated photodegradation. The bandgap of the titania nanoparticles was reduced after efficient doping, enabling the photodegradation of malachite green under visible light illumination. The results of photocatalytic degradation were confirmed using spectroscopy and high-performance liquid chromatography coupled with mass spectrometry.
Article
Materials Science, Ceramics
Gwanhee Park, Myungju Kim, Heesoo Lee
Summary: TiO2-based nanoparticles were synthesized using a steam-modified sol-gel method. The particle size reduction achieved by the steam method was confirmed by multiple measurement techniques, including peak broadening, Rietveld refinement, transmission electron microscopy, and small-angle X-ray scattering. The results demonstrated that the steam method effectively reduced the crystallite size of the nanoparticles, with consistent size measurements obtained by different techniques.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Hafiz Muhammad Asif Javed, Akbar Ali Qureshi, Remsha Mehmood, Muhammad Imran Tahir, Sofia Javed, Muhammad Sarfaraz, M. Yasar Javaid, Muhammad Awais, Usman Ali
Summary: Hydrogen treatment can enhance the performance of TiO2 nanoparticles in dye-sensitized solar cells, resulting in significantly improved photocurrent. The highly photoactive hydrogen treated TiO2 nanoparticles show potential for various applications, including photo-electrochemical water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
S. D. Lokhande, M. B. Awale, V. D. Mote
Summary: Undoped and Cu-doped ZnO thin films were prepared by spray pyrolysis technique and characterized. The study found that Cu doping led to a decrease in crystallite size, transmittance, and energy band gap values. FESEM analysis revealed a nanoflake morphology, with a decrease in structural sharpness as the Cu concentration increased. Gas sensing analysis showed that the 2% Cu-doped ZnO thin film had the highest ammonia sensing response and the shortest recovery time.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Jing Wang, Xiaotong Li, Yuanwen Ren, Zelin Xia, Hualin Wang, Weiwei Jiang, Chaoqian Liu, Shuang Zhang, Zhiqiang Li, Sumei Wu, Nan Wang, Guilin Liu, Shimin Liu, Wanyu Ding, Zhihua Zhang
Summary: In this study, 0.3 wt% Fe doped TiO2 nanoparticles were prepared using different types of additives, F-127 and K-30, and their effects on crystal structure and photocatalytic efficiency were investigated. It was found that F-127 inhibited the phase transformation, while K-30 promoted it, leading to differences in photocatalytic degradation under UV and visible light irradiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Tabarak A. Al-Mashhadani, Firas J. Kadhim
Summary: Rods of silver-dysprosium co-doped silica xerogels were synthesized via sol-gel method and characterized using UV-VIS-NIR and PL spectroscopy. Ag nanoparticles were confirmed through FE-SEM. UV-VIS-NIR spectra showed absorption peaks due to Dy3+ centers and PL results revealed three emission peaks. The samples showed potential for white light emitting applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Manmohan Lal, Praveen Sharma, Chhotu Ram
Summary: The study found that the calcination temperature has a significant impact on the crystalline properties, band gap, and morphology of TiO2 nanoparticles. Temperatures above 700 degrees Celsius shift the TiO2 spectra to the visible region, while at 400 degrees Celsius the crystalline size of TiO2 nanoparticles is 7.68 nanometers.
Article
Chemistry, Physical
Chung-Ming Lu, Raju Kumar Sharma, Pin-Yun Lin, Yi-Hsun Huang, Jung-Sheng Chen, Wen-Chien Lee, Chien-Yen Chen
Summary: In this study, expired egg white was used as a template to prepare TiO2 nano-powder and doped TiO2 powders. The photocatalytic activity of the prepared powders was investigated under different conditions. The results showed that doping with fluorine improved the photocatalytic activity of TiO2 in the visible-light region and the doping amount affected the catalyst's performance.
Article
Polymer Science
Luminita Predoana, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Simona Viorica Petrescu, Adriana Baran, Nicoleta G. Apostol, Ruxandra M. Costescu, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. Ianculescu
Summary: Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. The presence of single-phase anatase and dopants in the nanoparticles was confirmed by XRD and XRF analysis. XPS analysis verified the presence of Ti, O, Zn, and Cu on the surface of the nanoparticles. Cu doping was found to enhance the photocatalytic activity of TiO2 in the visible-light range by narrowing the band-gap energy.
Review
Multidisciplinary Sciences
Huaguang Xie, Zhong Li, Liang Cheng, Azhar Ali Haidry, Jiaqi Tao, Yi Xu, Kai Xu, Jian Zhen Ou
Summary: This review summarizes recent progress in the synthesis of two-dimensional metal oxides, including an overview of their categories and crystal structures, as well as a critical discussion of various synthesis methods. It also presents the existing challenges and possible future research directions.
Article
Chemistry, Multidisciplinary
Qiu-Hui Zheng, Chuang Chen, Si-Min Cao, Meng-Ting Peng, Bao-Xia Dong, Yun-Lei Teng
Summary: In this study, a series of composite catalysts with uniform morphology and homogeneously distributed active sites were prepared through direct pyrolysis of a nitrogen-rich metal-organic framework and subsequent acid treatment. The acid leaching process resulted in removal of excess nanoparticles and increased exposure of active sites, leading to higher specific surface area. Fe-N-C-900 catalyst, derived from the nitrogen-rich precursor, exhibited the highest selectivity for CO product and excellent long-term stability.
CHINESE CHEMICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yinfen Cheng, Zhong Li, Tao Tang, Kai Xu, Hao Yu, Xuewei Tao, Chu Manh Hung, Nguyen Duc Hoa, Yuqiang Fang, Baiyun Ren, Hui Chen, Jian Zhen Ou
Summary: This study demonstrates the reversible sensing of NO2 gas at room temperature using N-doped In2S3 micro-combs. The N dopants modify the electronic band structure of In2S3, facilitating its hybridization with NO2, resulting in high selectivity and excellent repeatability.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Guanyu Chen, Xinyi Hu, Mingwei Gu, Hao Wu, Keyu Chen, Hao Yu, Baiyu Ren, Zhong Li, Yange Luan, Tao Tang, Yinfen Cheng, Haibo Huang, Liguo Chen, Bao Yue Zhang, Jian Zhen Ou
Summary: Ultrathin heterostructures based on transition metal dichalcogenides (TMDs) play a crucial role in the development of next-generation electronic and optoelectronic devices. This study successfully demonstrates the single-step growth of an ultrathin WO3-x/WS2 heterostructure, which shows favorable properties for high-performance optoelectronic devices. The results show great potential for the fabrication of TMOs/TMDs heterostructures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Jiaqi Tao, Ruiyang Tan, Linling Xu, Jintang Zhou, Zhengjun Yao, Yiming Lei, Ping Chen, Zhong Li, Jian Zhen Ou
Summary: A facile and safe Ni2+-exchange strategy was proposed to synthesize graphite/CoNi alloy hollow porous composites with optimized impedance matching and electromagnetic attenuation. The composites exhibited excellent microwave absorbing performances.
Article
Chemistry, Physical
Zhan-Kuo Guo, Han-Qing Chen, Hui-Lin Jiang, Bao-Xia Dong, Yun-Lei Teng
Summary: This study demonstrates that CO2 captured by CaO can be selectively converted to CH4 through Ni- and hydrogen-assisted calcium looping processes, providing an efficient solution to alleviate greenhouse effect and energy shortage.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Materials Science, Multidisciplinary
Huifeng Wang, Chao Zhang, Baoxia Dong, Dichang Zhong, Tongbu Lu
Summary: Metal-organic layers (MOLs) have attracted significant attention in materials science due to their unique characteristics. Over the past decade, there has been rapid development in the synthesis and applications of MOLs. This review presents the latest research advances on MOLs, including the two preparation approaches, applications in gas separation, catalysis, energy catalysis and conversion, and chemical sensors, as well as future opportunities and challenges.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Yan Zhang, Chuang Chen, Qiu-Hui Zheng, Zhan-Kuo Guo, Bao-Xia Dong, Yun-Lei Teng
Summary: Metal heteroatom doped carbon materials show remarkable catalytic performance in the electrochemical CO2 reduction due to changes in the local density of state and electronic structure of carbon. S-doped NiII-triazolate precursors were synthesized, and pyrolysis produced Ni-S-CT materials with Ni3S2 as the main component, resulting in carbon structure defects that improve the catalytic activity. Ni-S-C1000 exhibited the best activity with high CO Faraday efficiency and stability. Density functional theory calculations on Ni3S2 were performed to understand the origin of the catalytic activity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Azhar Ali Haidry, Qawareer Fatima, Zhe Wang, Yucheng Wang, Yinwen Ji, Adil Raza
Summary: Ordered mesoporous TiO2 (OMT) with tunable channels was prepared using a facile soft-template evaporation-induced self-assembly (EISA) method. The effect of phenol-formaldehyde resins (PF) and the ratio of triblock copolymer (F127) and tetrabutyl titanate (TBOT) on the OMT surface was studied. By controlling the ratio of F127 and TBOT, OMT samples with specific surface area SSA ranging from 141-254 m^2/g, average pore size SP ranging from 5.3-9.8 nm, and pore volume VP ranging from 0.29-0.45 cm^3/g were obtained. The OMT with optimum SSA (approximately 220 m^2/g) and small SP (approximately 5.3 nm) exhibited high response, fast response time, and good long-term stability under 95% RH.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Qawareer Fatima, Azhar Ali Haidry, Riaz Hussain, Haiqian Zhang
Summary: In the past decade, perovskite-based solar cells (PSCs) have gained attention worldwide for their high-power conversion efficiency in photovoltaic (PV) research. However, the presence and stability of lead in the perovskite absorber layer has hindered their practical applications. This study utilized numerical simulations to evaluate the performance of oxide/perovskite/oxide-type PSCs, identifying the optimal combination of electron and hole transport layers for the highest PV performance. Additionally, the effects of different layer thicknesses and defects were analyzed in detail, demonstrating the potential of CsSnI3 as an absorber with optimized defects.
Review
Chemistry, Multidisciplinary
Jiaxin Li, Baogang Zhang, Baoxia Dong, Ligang Feng
Summary: The excessive emission of CO2 from fossil fuel consumption has caused severe energy and environmental crises. The utilization of MOF-derived transition metal-based catalysts for the electrochemical reduction of CO2 to CO has shown great potential. This mini-review provides an overview of the catalytic mechanism, various compositions, and challenges associated with MOF-derived transition metal-based catalysts for selective CO2RR to CO, aiming to guide the design and application of efficient catalysts.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhan-Kuo Guo, Han-Qing Chen, Hui -Lin Jiang, Bao-Xia Dong, Yun-Lei Teng
Summary: Storing and hydrogenating CO2 to CH4 is an efficient solution for addressing the greenhouse effect and energy shortage. This study demonstrates the selective conversion of CaO-captured CO2 to CH4 using Ni- and hydrogen-assisted calcium looping (CaL) processes. The Ni/CaO composite is synthesized in one step at room temperature without CO2 emission or the use of solvents. The study shows improved CO2 capture properties of CaO, lower CaO recovery temperature, and selective production of valuable CH4 through Ni- and hydrogen-assisted CaL processes at moderate/high temperature, achieving a methane yield of 68.58% and methane selectivity of 100% under mild conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Yin Fen Cheng, Zhong Li, Min Zhang, Hua Guang Xie, Tao Tang, Yi Liang, Xuan Xing Wang, Kai Xu, Bao Yue Zhang, Azhar Ali Haidry, Jian Zhen Ou
Summary: In this study, tailorable 2D SnO nanosheets with thicknesses between 1.5 and 3 nm are prepared by controlling self-limiting oxidation over the liquid Sn surface. The nanosheets exhibit high sensitivity and reversibility for NO2 detection at room temperature.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Turki Alkathiri, Kai Xu, Bao Yue Zhang, Muhammad Waqas Khan, Azmira Jannat, Nitu Syed, Ahmed F. M. Almutairi, Nam Ha, Manal M. Y. A. Alsaif, Naresha Pillai, Zhong Li, Torben Daeneke, Jian Zhen Ou
Summary: The successful synthesis of 2D palladium sulphate nanosheets from palladium sulphide bulk crystals has shown great potential for gas sensing applications. The sensor exhibits reversible, selective, and sensitive response to ppb-level nitrogen dioxide gas, with promising performance enhancements over other gases.
