Article
Chemistry, Multidisciplinary
Adina Stegarescu, Humberto Cabrera, Hanna Budasheva, Maria-Loredana Soran, Ildiko Lung, Francesca Limosani, Dorota Korte, Matteo Amati, Gheorghe Borodi, Irina Kacso, Ocsana Opris, Monica Dan, Stefano Bellucci
Summary: This study demonstrates the adsorption and photodegradation capabilities of modified multi-walled carbon nanotubes (MWCNTs) using tartrazine as a model pollutant. The optimal adsorption conditions are pH 4 for MWCNT-COOH/Fe3O4 and pH 3 for MWCNT-COOH/Fe3O4/NiO. The predominant degradation process is through photodegradation rather than adsorption.
Article
Materials Science, Multidisciplinary
Subur P. Pasaribu, Indra Masmur, Hestina, Aman Sentosa Panggabean
Summary: Self-healing poly-acrylic acid/TiO2 (PT) hybrid hydrogel with different water amount was fabricated by UV light irradiation. The cross-linking formation of PT hydrogels was due to UV light absorption by TiO2 generating radical species to polymerize acrylic acid monomer to poly-acrylic acid. XRD analysis confirmed the presence of TiO2 in the hydrogel, and FTIR analysis revealed the polymerization of acrylic acid to poly-acrylic acid. The PT hydrogels with different water amount showed distinct physical appearances, with rigid hydrogel obtained with less water amount and spongy hydrogel formed with more water amount. PT-4 hydrogel exhibited the highest self-healing efficiency of around 85%, attributed to the hydrogen bond between TiO2 and carboxylic functional groups in poly-acrylic acid. The healed PT-4 hydrogel demonstrated the capability to convert toxic 4-nitrophenol to 4-aminophenol through photocatalytic hydroge-nation reaction within 2 h UV light irradiation.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Xiaochi Han, Wenbo Dong, Longyu Li, Xuemei Zhou
Summary: In this work, a three-dimensional heterojunction is formed by coupling one-dimensional TiO2 nanotube arrays with a controlled thickness covalent organic framework (COF) thin film. The resulting heterojunction exhibits a 3.3-fold higher hydrogen evolution rate compared to TiO2 and becomes active for CO2 conversion, as compared to the bare COF. Such high activity is attributed to the large difference in Fermi levels forming an internal electric field at the interface.
CHEMICAL COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Zheng Zhang, Changsheng Feng, Caiyun Jiang, Yuping Wang
Summary: This study successfully prepared Ag@AgCl/TiO2 nanotubes and characterized their crystal structure and properties through various experiments. The results showed that 40%Ag@AgCl/TNTs has a higher removal rate of o-NBA under visible light, indicating its superior photocatalytic performance.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Kamil Urbanek, Kaja Spilarewicz, Jiaguo Yu, Wojciech Macyk
Summary: This work designed an advanced photocatalytic system composed of titanium dioxide (P25) and mSFO (Sn-doped magnetite with Fe-doped cassiterite) for gas phase CO2 reduction. A synthesis route of mSFO composite was proposed, and the obtained material was characterized by various techniques. The mSFO/P25 system showed photocatalytic reduction ability of CO2 to CO, which was confirmed by the use of labeled carbon dioxide. The surface photovoltage and electrochemical measurements supported the S-scheme mechanism.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
Li Sun, Quan Zhou, Jiaheng Mao, Xingyu Ouyang, Zhigang Yuan, Xiaoxiang Song, Wenbang Gong, Shunqi Mei, Wei Xu
Summary: Water pollution can be treated through the photocatalytic reaction of TiO2 or TiO2 compounds. In this study, Fe3O4 and Fe3O4@TiO2 composite photocatalysts were prepared using a solvothermal method, and it was found that Fe3O4@TiO2 can reduce the band gap and maintain a certain proportion of high-energy facet exposure. The photocatalytic degradation experiment demonstrated that Fe3O4@TiO2 can significantly improve the degradation efficiency of Acid Red 73 and achieve higher degradation rate after self-cleaning treatment.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Ceramics
Patricia Petriskova, Olivier Monfort, Leonid Satrapinskyy, Edmund Dobrocka, Tomas Plecenik, Gustav Plesch, Roman Papsik, Raul Bermejo, Zoltan Lences
Summary: TiO2 nanotubes were prepared on different substrates to compare their photocatalytic activity, and nanotubes grown on Ti foil exhibited the best photocatalytic activity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Almudena Aguinaco, Jose M. Manuel, Eduardo Blanco, Manuel Dominguez, Rocio Litran, Juan J. Delgado, Milagrosa Ramirez-del-Solar
Summary: The optical properties of 5wt% Fe3O4-TiO2 thin films were evaluated in detail in this study. The results showed that the incorporation of 5wt% Fe3O4 improved the optical properties and enhanced the separation efficiency of photoexcited electron-hole pairs in the photocatalyst. The study also proposed a mechanism for solar photocatalytic processes based on experimental results.
Article
Chemistry, Multidisciplinary
Oscar R. Andrade, Veronica Rodriguez, Rafael Camarillo, Fabiola Martinez, Carlos Jimenez, Jesusa Rincon
Summary: The effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles was analyzed in this study. The results showed that the photocatalytic performance of the prepared catalysts was enhanced due to the synergistic effect of N doping and carbon support.
Article
Chemistry, Multidisciplinary
Siyuan Zhang, Zewen Sun, Yue Zhou, Wenshu Chen, Qianhui Wu, Jianhua Sun, Leiming Lang
Summary: Ag nanoparticles significantly enhance the photocatalytic activity of self-organized TiO2 nanotube structures. In this study, novel Ag/TiO2 tube-in-tube fibers were prepared using a simple electrospinning technology and calcination process. As a photocatalyst, the composite efficiently catalyzes the photodegradation of the model organic pollutant, rhodamine B, under visible light irradiation, showing superior photocatalytic activity compared to undoped TiO2 tube-in-tube fibers. This enhancement is attributed to the plasmonic characteristics of Ag nanoparticles, which promote light absorption and charge transfer feasibility. The simple, low-cost, and green fabrication route of the composite provides a novel means for preparing similar materials, holding great promise for wider application in the future.
Article
Environmental Sciences
Zhenyu Shi, Lei Rao, Peifang Wang, Lixin Zhang
Summary: Graphite carbon nitride (g-C3N4) is a promising photocatalyst with high catalytic activity, low cost, and high biosafety. However, its application in water purification is limited due to the complexity of underwater photochemical reaction conditions and the disadvantages of g-C3N4 itself. To improve its underwater photocatalytic performance, researchers prepared a g-C3N4/carbon nanotubes (CNT-CN) composite photocatalyst with high specific surface area and enhanced light absorption capacity, which showed significantly improved photodegradation efficiency under different underwater transmission light.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Deyi Ma, Xinquan Zou, Zhonghua Zhao, Jia Zhou, Shuo Li, Huixian Yin, Jikui Wang
Summary: A new nano matrix composite membrane with fouling resistance, photocatalysis, and antibacterial properties was successfully synthesized in this study. With a certain amount of AMT, the membrane exhibited the highest anti-pollution rate and flux recovery rate, as well as high degradation efficiency of dyes and antibacterial rate. Therefore, the AMTP nano matrix composite membrane has great potential in wastewater recovery and recycling.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Environmental Sciences
Seyed Ghorban Hosseini, Javad Vahabzadeh Pasikhani
Summary: The study showed that coupling TNTs with 2 wt% MAC can increase surface area and decrease band gap energy, leading to a significant improvement in photoreduction efficiency. Using 0.2 g TNTs/MAC as an optimal dosage in acidic solution can increase the photoreduction efficiency up to 81%. The presence of oxalic acid as a hole scavenger resulted in TNTs/MAC (2%) reducing 97% of Cr(VI), showing a great potential for environmental remediation.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Environmental Sciences
Yandi Rao, Yuxin Zhang, Aoqi Li, Tianhu Zhang, Tifeng Jiao
Summary: The composite photocatalyst G-TiO2@Fe3O4/PS, prepared with TiO2, graphite (G) and Fe3O4, showed excellent photocatalytic activity in degrading ARS under visible light, with superior efficiency and stability.
Article
Engineering, Environmental
Sheng-Zhe Zhao, Ran Lu, Yi Yang, Yun Lu, Raul D. Rodriguez, Jin-Ju Chen
Summary: Porous nanotubular g-C3N4/TiO2 photocatalysts were synthesized using electrospinning and vapor deposition. The use of waste foam as a precursor material for TiO2 nanotubes reduced production costs and allowed for resource recovery. The modification of g-C3N4 onto TiO2 nanotubes increased active sites, specific surface area, and improved charge separation. The g-C3N4/TiO2 nanotubes exhibited excellent photocatalytic effects in organic dye degradation and H-2 evolution under simulated sunlight. This study provides a facile synthesis method for preparing multifunctional porous nanotubes from abandoned resources, with implications for environmental remediation and hydrogen generation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.