Article
Engineering, Environmental
Xuemei Zhang, Qian Wang, Yong Liu
Summary: A novel photocatalyst Cu0/Cu2O-PANI-CNTs was developed for efficient reduction of nitrate to nitrogen under neutral pH, achieving 100% removal efficiency of nitrate and high N2 selectivity. The interaction between Cu0, ecb, and PANI contributes to the excellent repeatability of the catalyst.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Beiya An, Guofei Jiang, Jialiang Liu, Fei Gao, Fang Liu, Qiang Chen, Ruiyu Zhao
Summary: In this study, a Cl-doped g-C3N4 nanotube composite Ti3C2 (Cl-TCN@TC) photocatalyst was prepared for the first time, which has significant advantages in decarbonization and denitrification of wastewater. The Cl-TCN@TC-2 showed excellent removal effects on tetracycline (TC, 91.08%) and p-nitrophenol (p-NP, 70.92%). The kinetic constants for the degradation of TC and p-NP by Cl-TCN@TC-2 were significantly higher than those of CN. The COD removal rates of domestic sewage and oilfield produced water by Cl-TCN@TC-2 reached 54.2% and 64.8%, respectively. After the addition of HCOOH, the denitrification rate of Cl-TCN@TC-2 reached 50.24%, which was 12.62 times higher than that of CN, with a N2 selectivity of 92.46%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Li Cai, Jinrui Guo, Ting Liu, Jing Tian, Zhaoli Wang, Yong Liu, Mohamed S. Hamdy, Xuping Sun
Summary: In this study, a novel Cu@Fe-Cu-CuFe2O4-x photocatalyst was prepared and used to selectively reduce NO3- to N-2 with a two-step reduction process. The first step achieved 91.0% NO3- reduction to NO2- and N-2, while the second step further enhanced the selectivity of NO2- reduction to N2 through the introduction of H2C2O4 and H2O2. The overall process achieved high NO3- removal efficiency and N-2 selectivity.
Article
Materials Science, Multidisciplinary
Wen Zhang, Mingyang Gao, Huaiyang Zhu, Yifan Hui, Qinzhe Cao, Chunxue Zhai, Zhiyong Zhang
Summary: 2D materials-based heterostructure shows excellent performance in photocatalytic degradation by effectively transferring and separating photo-generated carriers. In this study, heterostructures of MoS2/graphene were fabricated for the degradation of methylene blue (MB) under natural light, surpassing the abilities of 2D MoS2 and graphene monomer materials. The optimal mass ratio of the precursors and the micromorphology of the heterostructures were also determined.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Jesna Louis, Nisha Thekkekudathingal Padmanabhan, Madambi Kunjukuttan Jayaraj, Honey John
Summary: In the future hydrogen economy, there is a need to replace platinum-based catalysts due to economic constraints. Developing cost-effective, durable, and efficient catalysts is a relevant research frontier.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Hefei Shi, Dan Chen, Xinbai Jiang, Yan Li, Wenbo Fan, Cheng Hou, Libin Zhang, Yixuan Wang, Yang Mu, Jinyou Shen
Summary: This study demonstrated enhanced degradation of high-concentration pyridine and simultaneous denitrification using an Electricity assisted bio-photodegradation system (EBPS). By suppressing the recombination of photoelectron-hole pairs and utilizing denitrification in the biocathode zone, the degradation process was significantly accelerated. Analysis of microbial communities and genes involved in pyridine metabolism, denitrification, and extracellular electron transfer highlighted the crucial role of photoelectrical stimulation in EBPS. This approach provided a sustainable way for simultaneous removal of pyridine and nitrogen in wastewater.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Deling Wang, Erda Zhan, Shihui Wang, Xiyao Liu, Guiyang Yan, Lu Chen, Xuxu Wang
Summary: By coupling Pd and CTAB-modified ZnIn2S4 semiconductors, a coordination photocatalyst, Pd/ZnIn2S4, is constructed with an enhanced degradation rate of 81% for fuel denitrification within 240 min, which is 2.25 times higher than that of ZnIn2S4. The study also reveals the selective adsorption of pyridine and the formation of Zn…C-N or In…C-N coordination on the surface of Pd/ZnIn2S4. Additionally, this work provides insights into the surface/interface coordination effect of metal/nanosheets at the molecular level in photocatalytic fuel denitrification.
Article
Chemistry, Physical
I. Jennifer Gomez, Miguel Diaz-Sanchez, Nadezda Pizurova, Lenka Zajickova, Sanjiv Prashar, Santiago Gomez-Ruiz
Summary: This work reports a facile synthesis method of hybrids of F-doped TiO2 and N-doped graphene quantum dots (F-TiO2@N-GQDs), which show efficient photocatalytic properties in light-driven pollutant reduction.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Shinbi Lee, Yoojin Lee, Wonyong Choi
Summary: Nitrate (NO3-) and nitrite (NO2-) are common water pollutants and need to be controlled for water quality. A method using Pd-loaded TiO2 (Pd/TiO2) in an aqueous suspension has been developed for the conversion of nitrite to nitrate. The presence of aquatic pollutants such as arsenite (As (III)) or 4-chlorophenol (4-CP) can change the main photoconversion product from nitrate to N-2 and enhance the durability of Pd/TiO2. This process can be a viable treatment option for nitrite-contaminated water with various aquatic pollutants.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Multidisciplinary
Mohamed Saeed, Paula Palacios, Muh-Dey Wei, Eyyub Baskent, Chun-Yu Fan, Burkay Uzlu, Kun-Ta Wang, Andreas Hemmetter, Zhenxing Wang, Daniel Neumaier, Max C. Lemme, Renato Negra
Summary: This article reviews the application of graphene in high-frequency circuits. It provides detailed information on the growth and transfer methods of graphene, discusses the construction of GFETs and graphene diodes, and explores the possibilities and limitations of using them in different circuits.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Ceramics
Catia Liane Ucker, Francielen San Martins Rodrigues, Fabio Calcagno Riemke, Fernando Dal Pont Morisso, Marcio Daldin Teodoro, Valmor R. Mastelaro, Mateus Meneghetti Ferrer, Cristiane Wienke Raubach, Sergio da Silva Cava
Summary: This study demonstrates the synthesis of an orthorhombic Nb2O5 (T) heterostructure coated with low-crystallinity Nb2O5 using the polymeric precursor method. The heterostructure sample exhibited a significant enhancement in photocatalytic performance compared to orthorhombic Nb2O5, achieving complete degradation of RhB within 60 min.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Qingming Meng, Wenna Liu, Juan Jiang, Xinle Zhang
Summary: CuO/ZnO p-n heterojunction nanofibers were synthesized for efficient elimination of pyridine in fuel oil. The system was capable of degrading over 90% of pyridine within 60 minutes under visible light, with the p-CuO/n-ZnO nanofibers showing enhanced denitrification efficiency compared to ZnO alone. Mechanistic investigations suggested that photoexcited holes played a key role in generating reactant intermediates during the degradation process.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemistry & Molecular Biology
Ruowen Liang, Shihui Wang, Yi Lu, Guiyang Yan, Zhoujun He, Yuzhou Xia, Zhiyu Liang, Ling Wu
Summary: A novel SnO2@MCr heterojunction with a zero-dimensional/three-dimensional structure was successfully synthesized, leading to superior photocatalytic activity for the denitrification of pyridine. Adsorption mechanisms and photocatalytic enhancement through formation of the S-scheme heterojunction were investigated, shedding light on the effective removal of nitrogen-containing compounds.
Article
Chemistry, Physical
Tanveer A. Gadhi, Imtiaz Ali Bhurt, Tayyab A. Qureshi, Imran Ali, Anira Latif, Rasool Bux Mahar, Najeebullah Channa, Barbara Bonelli
Summary: In this study, 3D-structured clay filters were prepared and coated with iron-doped titanium dioxide (Fe-TiO2) using 3D printing and sol-gel soaking and calcination techniques. The coated filters showed uniform coatings of round-shaped Fe-TiO2 on the tiny pore of the clay filter, and had an optical energy band gap of around 2.8 eV. The Fe-TiO2-coated clay filters exhibited high denitrification efficiency and photocatalytic degradation performance for indigo carmine dye.
Article
Green & Sustainable Science & Technology
Y. Yang, H. Wang, Y. Zhao, B. Xin, B. Jiang
Summary: In this study, a stable sheet-like carbon quantum dots/poly-p-phenylenediamine (CQDs/PpPD) nanophotocatalyst with excellent photocatalytic performance was prepared using glucose and p-phenylenediamine as raw materials via a microwave melting method. The as-prepared CQDs/PpPD exhibited a stable composite structure with spherical CQDs of 2.0-5.0 nm evenly distributed on the surface of sheet-like PpPD. The photocatalytic performance of CQDs/PpPD was significantly improved, achieving a degradation efficiency of 91.8% for 50 ppm rhodamine B within 10 minutes.
MATERIALS TODAY SUSTAINABILITY
(2023)
