Article
Environmental Sciences
Davinder Kaur, Karanveer Singh, William T. T. Reynolds Jr, Bonamali Pal
Summary: Graphene oxide (GO) is a promising material in photocatalysis, adsorption, and energy storage due to its high surface area and unique layered structure. Anthracite coal is an attractive precursor for GO because it provides high concentration of sp(2) carbon, resulting in high conductivity and absorbance in the visible region. GO-TiO2 nanocomposites were prepared to enhance photocatalytic activity by facilitating electron transmission from TiO2 to GO, and Ag nanoparticles were coated on TiO2 to further boost activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Caofan Xiao, Xueqi Chen, Xiumei Tao, Xian Liu, Xun Wang, Lei Zhu
Summary: In this study, B-doped TiO2 photocatalytic materials were synthesized by sol-gel method and characterized by XRD, TEM, XPS, and other methods. The results showed that 4%B-TiO2 nanopowder had smaller grain size, higher porosity, and lower bandgap energy compared to undoped TiO2. Scavenging experiments and ESR results revealed that ·OH was the main active species. Therefore, under 365 nm UV light, the degradation efficiency of AP reached 98.8% in 30 minutes when using 10 mg/L initial concentration of AP and 1 g/L loading of 4%B-TiO2, due to the efficient generation of ·OH by B-TiO2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yadala Venkata Divyasri, Nagappagari Lakshmana Reddy, Kiyoung Lee, M. Sakar, Vempuluru Navakoteswara Rao, Vemula Venkatramu, Muthukonda Venkatakrishnan Shankar, Nallagondu Chinna Gangi Reddy
Summary: This study optimized nitrogen doping in TiO2 nanotubes to achieve enhanced photocatalytic efficiency for dye degradation and hydrogen production under solar light exposure. By controlling the nitrogen doping concentration, the N-doped TiO2 nanotubes showed efficient photocatalytic performance and stable recyclability.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Masoumeh Sharifi Teshnizi, Mohammad Karimi
Summary: In this study, the morphology, characterization, and effectiveness of TiO2/graphene composite nanofiber photocatalysts in the treatment of pharmaceutical wastewater were investigated. Optimum conditions were determined, and the photocatalyst showed efficient degradation of pharmaceutical compounds and potential for practical and economic applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Luminita Andronic, Alina Vladescu, Alexandru Enesca
Summary: This study investigated the synthesis, characterization, and photocatalytic activity of TiO2 on the degradation of imidacloprid, as well as the toxicity of TiO2 nanoparticles and imidacloprid on green algae. It was found that TiO2 had low toxicity to the algae, while imidacloprid showed high toxicity levels in low concentrations in an aquatic environment over a long period of time.
Article
Chemistry, Multidisciplinary
Mitra Malekkiani, Fatemeh Ravari, Abbas Heshmati Jannat Magham, Mehdi Dadmehr, Heiko Groiss, Hasan Ali Hosseini, Reza Sharif
Summary: The synthesis of core-shell heterostructures composed of titanium oxide and cerium oxide deposited on reduced graphene oxide was described. These heterostructures showed superior photocatalytic performance for the degradation of organic pollutants, attributed to effective electron-hole separation and charge recombination suppression. Biological assay demonstrated low cytotoxicity against breast cancer cells.
Article
Environmental Sciences
Amir Bateni, Kamran Valizadeh, Yasin Salahshour, Amir Hossein Behroozi, Ali Maleki
Summary: Wastewater containing pharmaceutical contaminants is a growing concern due to population growth and increased drug consumption. This study successfully synthesized a novel nanocomposite for photocatalytic degradation of pharmaceutical residues. The results showed that the nanocomposite had excellent degradation performance and reusability.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Fatemeh Firouzi, Azadeh Ebrahimian Pirbazari, Fatemeh Esmaeili Khalil Saraei, Fatemeh-Sadat Tabatabai-Yazdi, Amin Esmaeili, Ziba Khodaee
Summary: Binary nanocomposites of CdS nanoparticles impregnated on TiO2 nanosheets and graphene oxide were prepared and showed that O-2(center dot-) played a major role in photocatalytic removal. The integration of adsorption and photocatalysis processes significantly impacted the removal of the pharmaceutical pollutant TC.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Ning Zhang, Xiaofeng Ning, Jia Chen, Jianming Xue, Gongxuan Lu, Hongdeng Qiu
Summary: The development of TiO2-based composites with broad light response and outstanding photocatalytic performance is crucial for the removal of antibiotics. In this study, a series of porous graphene (PG)/TiO2 nanocomposites with different highly reactive interfaces were prepared using TiCl4 as the Ti source. The optimized PG/TiO2-4% exhibited the best removal performance among all the nanocomposites, achieving a higher removal rate of tetracycline antibiotic compared to conventional PG/TiO2, pure TiO2 (P25), and PG. The results were attributed to the high specific surface area and porous structure of PG, the broad light response range and rapid separation of charges in PG/TiO2, and the highly reactive interface between PG and TiO2 nanoparticles.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Chemical
Seydeh Sakineh Rezaei, Babak Kakavandi, Mohammad Noorisepehr, Ali Akbar Isari, Shirin Zabih, Parnia Bashardoust
Summary: The study synthesized TiO2 decorated ferroferric oxides coupled with activated carbon (TFOC) as a magnetic heterogeneous catalyst for degrading tetracycline (TC) using UV light and peroxydisulfate (PS) activation. The TFOC material showed enhanced photocatalytic activity towards TC degradation under UV light, demonstrating its potential for efficient treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Warda Shahzad, Ahmad K. Badawi, Zulfiqar A. Rehan, Asad Muhammad Khan, Rafaqat Ali Khan, Faheem Shah, Shahid Ali, Bushra Ismail
Summary: In search of better materials for visible light photocatalytic performance, perovskite Sr-0.3(Ba/Mn)(0.7)ZrO3 nanopowders anchored on graphene oxide were synthesized. The photocatalytic activity against methylene blue was evaluated. Chemical coprecipitation method and annealing at high temperature were used to synthesize the composite, resulting in improved charge separation and generation of hydroxyl radicals.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jia You, Liyuan Zhang, Lihua He, Bingqing Zhang
Summary: ZnO-TiO2/SO42- (ZTOS) heterojunction composites were prepared using an inorganic precipitation-peptization method, exhibiting enhanced photocatalytic activity and stability. The molar ratios of Zn : Ti were found to significantly influence the performance. The heterojunction structure of ZnO-TiO2 provided stronger light absorption and efficient charge separation.
Article
Chemistry, Physical
Jishu Rawal, Urooj Kamran, Mira Park, Bishweshwar Pant, Soo-Jin Park
Summary: Nitrogen and sulfur co-doped graphene quantum dots (GQDs) were synthesized using different 1-D carbon nanomaterials as precursors, showing superior photocatalytic performance when heterojunctioned with TiO2 and exhibiting efficient degradation of organic dyes.
Article
Materials Science, Multidisciplinary
Chunli Hao, Dairan Zhou, Jianxiang Xu, Shi Hong, Wenmei Wei, Tingting Zhao, Huabin Huang, Weijun Fang
Summary: The study developed vancomycin-encapsulated ZIF-8 nanoparticles with the ability to combat gram-positive bacteria. These nanoparticles, prepared by a simple method, exhibit higher antibacterial efficacy than free vancomycin molecules and show strong photoinactivation of bacteria under light irradiation.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Environmental Sciences
Renlan Liu, Min Zhao, Xiangyong Zheng, Qi Wang, Xianfeng Huang, Yi Shen, Baoliang Chen
Summary: A novel rGO-TiO2(B) composite membrane was constructed by UV-light-assisted self-assembly of reduced graphene oxide and monoclinic crystalline titanium dioxide on a nylon membrane, exhibiting outstanding photocatalytic activity and excellent methylene blue removal rate. The synergistic effect of rGO and TiO2(B) facilitated the photocatalytic degradation of methylene blue.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)