Article
Environmental Sciences
Jiangzhou Qin, Nengsheng Liu, Yi Wei, Yanyu Lu, Yiping Huang, Quanlin Zhao, Zhengfang Ye
Summary: Revealing the activation mechanism of nitrate reduction is crucial for designing efficient photocatalysts for nitrate removal. In this study, the performance of photocatalytic nitrate reduction was thoroughly investigated on different crystalline phases of TiO2. It was found that anatase TiO2 exhibited a higher rate of nitrate degradation than rutile TiO2 under simulated sunlight conditions. The possible reaction paths of nitrate reduction on anatase TiO2 were verified through in situ Fourier Transform Infrared (FTIR) and density functional theory (DFT) calculations. This study presents a new perspective on the reaction paths of nitrate photoreduction.
Article
Nanoscience & Nanotechnology
Yi Shen, Shasha Liu, Lun Lu, Chao Zhu, Qile Fang, Renlan Liu, Zhiqiao He, Yungui Li, Shuang Song
Summary: In this study, nanoscale TiO2 materials with different types of vacancies were synthesized and it was found that pn-TiO2 containing dual vacancies exhibited higher photocatalytic activity for gaseous toluene removal. The dual vacancies in pn-TiO2 enabled the full utilization of the valence and conduction bands to generate free radicals, leading to synergistic degradation of VOCs, providing a new pathway for catalyst design.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qian Li, Yunni Liu, Zhe Wan, Haiyan Cao, Shao Zhang, Yue Zhou, Xingyu Ye, Xiaoyan Liu, Dieqing Zhang
Summary: A low-cost photocatalyst, rutile and anatase mixed phase TiO2, was synthesized using a facile microwave-hydrothermal method, with oxygen vacancy generated for improved adsorption and reduction activity towards nitrate pollutants.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Physical
Alessandro Gottuso, Claudio De Pasquale, Stefano Livraghi, Leonardo Palmisano, Sandra Dire, Riccardo Ceccato, Francesco Parrino
Summary: This study reports a selective photocatalytic oxidative cleavage of limonene to limononaldehyde using irradiated TiO2 suspensions in the presence of silver nitrate under ambient conditions. The results demonstrate a notable conversion and selectivity of 60% towards limononaldehyde within one hour of irradiation. The oxidation process is primarily driven by nitrate radicals, generated through hole-induced oxidation of nitrate ions. This selective photocatalytic approach shows promise for the scalable industrial synthesis of partially oxidized compounds.
MOLECULAR CATALYSIS
(2023)
Article
Environmental Sciences
Lingsheng Wang, Weizhang Fu, Yuping Zhuge, Jun Wang, Fanfeng Yao, Wanzhen Zhong, Xiaohong Ge
Summary: A sandwich-type polyoxometalate Na [alpha-SiW9O34] was synthesized and SiW9/TiO2/Cu composite was prepared for the catalytic reduction of nitrate. The prepared composite catalyst showed better photocatalytic activity than TiO2, achieving 76.53% nitrate removal with 82.09% N-2 selectivity under specified conditions.
Article
Biochemistry & Molecular Biology
Wojciech Baran, Mateusz Cholewinski, Andrzej Sobczak, Ewa Adamek
Summary: This study elucidated the mechanism of sulfisoxazole (SFF) selective removal by photocatalysis in the presence of TiO2 and FeCl3, and compared the degradation pathways of SFF and other antibiotics. FeCl3 facilitates the generation of organic radicals, accelerating the degradation of SFF.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Environmental
C. Ashina, N. Pugazhenthiran, P. Sathishkumar, M. Selvaraj, Mohammed A. Assiri, Chandrasekaran Rajasekaran, M. A. Gracia-Pinilla, R. V. Mangalaraja
Summary: In this study, Ni@NiFe2O4/TiO2 magnetic nanocomposites were prepared via a simple sonochemical route, and they showed excellent photocatalytic activity and activation of peroxymonosulphate under direct solar light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Mikhail Lyulyukin, Tikhon Filippov, Svetlana Cherepanova, Maria Solovyeva, Igor Prosvirin, Andrey Bukhtiyarov, Denis Kozlov, Dmitry Selishchev
Summary: This study confirms that solid uranium oxycompounds and uranyl-grafted materials on nanocrystalline anatase TiO2 exhibit higher photocatalytic activity under visible light, with a significantly higher reaction efficiency compared to commercial photocatalysts.
Article
Environmental Sciences
Rodrigo Gonzalez-Quiles, Juan Manuel de Andres, Jorge Rodriguez-Chueca
Summary: The article discusses the potential of advanced oxidation processes in reducing organic pollutants, with a focus on the generation of sulfate radicals by activation of PMS by Fe2+ and TiO2. Results show that UV-C leads to faster discoloration of methylene blue, and Fe2+ and TiO2 enhance the discoloration effect.
Article
Chemistry, Multidisciplinary
Wen -Min Wang, Shi-Jer Tseng, Yu-Shuan Huang, Qian-Yuan Wu, Wen-Long Wang, Jerry J. Wu
Summary: Nitrate pollution in wastewater is a threat to human health and the environment. Photocatalytic reduction using a novel hollow-structured Pd/TiO2 photocatalyst shows high efficiency in removing nitrate and high selectivity for N2 yield.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Environmental Sciences
Sayed Mukit Hossain, Heeju Park, Hui-Ju Kang, Jong Seok Mun, Leonard Tijing, Inkyu Rhee, Jong-Ho Kim, Young-Si Jun, Ho Kyong Shon
Summary: The study utilized sludges generated from dye wastewater treatment to retrieve photoactive titania, which was heterojunctioned with graphitic carbon nitride for enhanced photocatalytic activity in removing nitrogen oxides from the atmosphere. Advanced sample characterization confirmed successful heterojunction with improved morphological and optical attributes, leading to enhanced photoactivity in removing NOx under both UV and visible light irradiance.
Article
Environmental Sciences
Lingsheng Wang, Weizhang Fu, Shujuan Sun, Huaihao Liu, Jinhua Wang, Wanzhen Zhong, Bin Ma
Summary: Due to rapid industrial and agricultural development, nitrate pollution in groundwater is increasing. In this study, a composite photocatalyst SiW11/TiO2/Cu was prepared using heteropoly silicotungstate K-8[alpha-SiW11O39] and Cu2+ as active components. The photocatalytic reduction of dissolved NO3-N using SiW11/TiO2/Cu showed significant advantages in terms of its photocatalytic activity. The mechanism of NO3-N reduction and the detection of free radicals were also investigated.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zuxiao Zhang, Duong T. Ngo, David A. Nagib
Summary: A dual catalytic strategy involving an Ir photocatalyst and a Cu complex enables regioselective amination and cross-coupling of allyl alcohols with various nucleophiles. This approach allows for the formation of N-radicals via an energy transfer mechanism followed by interception of alkyl radicals for radical amino-functionalizations of olefins. Insights into the nature of Cu-based radical interception are provided through stereo, regio, and kinetic probes.
Article
Materials Science, Multidisciplinary
Weizhe Wang, Haowei Huang, Xi Ke, Xiao Liu, Shuhui Yang, Kunqiang Wang, Le Huang, Chen Tu, Zhaoqiang Zheng, Dongxiang Luo, Menglong Zhang
Summary: In this work, Z-scheme heterojunction photocatalysts composed of FAPbBr(3) nanocrystals and WO3 were prepared and showed excellent performance in the photocatalytic oxidation of benzyl alcohol to benzaldehyde or benzoic acid. Manipulation of the size of FAPbBr(3) nanocrystals altered the product selectivity.
MATERIALS & DESIGN
(2022)
Article
Biochemistry & Molecular Biology
Muhammad Kamran, Mohamed A. Morsy, Tarek A. Kandiel, Wissam Iali
Summary: This study investigated the potential use of electron paramagnetic resonance (EPR) and TEMPOL to directly monitor the photocatalytic activity of TiO2 suspensions without the need for filtration. The results showed that TEMPOL had negligible dark adsorption and could effectively evaluate the activity of photocatalysts. The mechanisms of TEMPOL deactivation and the formation of deactivation products were analyzed.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
