Article
Environmental Sciences
Yen -Ping Peng, En-Xian Zhang, Chia -Hung Chen, Wu -Xing Chen
Summary: In this study, iron was deposited onto titanium dioxide nanotube arrays (TNAs) using the impregnation method to enhance its photocatalytic ability. The results showed that the iron modification successfully attached iron nanoparticles evenly to the TNAs, resulting in improved degradation of trichloroethylene (TCE) in a photoelectrochemical (PEC) system. The Fe-TNAs exhibited red-shifted absorption wavelength and reduced recombination of photo-generated electron-hole pairs, leading to enhanced TCE degradation.
Article
Chemistry, Physical
Kaihang Zhang, Yuanzheng Zhang, Su Liu, Xin Tong, Junfeng Niu, Dong Wang, Junchen Yan, Zhaoyang Xiong, John Crittenden
Summary: In this study, a MnOx-TiO2 NTAs anode was prepared by compositing narrow bandgap manganese oxide (MnOx) with TiO2 nanotube arrays (TiO2 NTAs). Electrochemical characterizations revealed that increasing the composited concentration of MnOx improved the conductivity and reduced the oxygen evolution potential, thus enhancing the electrochemical activity of the MnOx-TiO2 NTAs anode. Moreover, the optimal degradation rate of benzoic acid (BA) was achieved by adjusting the MnOx concentration and degradation voltage. These quantitative results are of great significance for the design and application of high-performance materials for electrochemical advanced oxidation processes (EAOPs).
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Engineering, Chemical
Bingrui Ma, Shuaishuai Xin, Yanjun Xin, Xiaoming Ma, Chunlei Zhang, Mengchun Gao, Fei Ma, Yumiao Ma
Summary: BiOBr modified TiO2 nanotube arrays photoelectrodes showed higher PEC degradation efficiency for p-chloronitrobenzene. Hydroxyl radical and photogenerated holes were the main active species responsible for degradation. However, the coexistence of dissolved anions and humic acid could decline p-CNB removal rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Martin Motola, Raul Zazpe, Ludek Hromadko, Jan Prikryl, Veronika Cicmancova, Jhonatan Rodriguez-Pereira, Hanna Sopha, Jan M. Macak
Summary: A reconstruction process of TiO2 nanotube (TNT) layers was conducted to enhance their photoelectrochemical performance and photocatalytic activity. By preparing double-wall (DW) TNT layers, etching the inner wall to obtain single-wall (SW) TNT layers, and coating with TiO2 coatings of different thicknesses, significant improvements were achieved in incident photon-to-electron conversion efficiency and photocatalytic performance compared to untreated TNT layers.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Jianhui Xu, Yufeng Liu, Dan Li, Chunhui Zhang, Xin Fu, Yunfei Zhang, Pengxu Wang, Jincheng Lu, Shenggui Chen, Lei Li
Summary: Electrocatalytic technology is used for the activation of peroxymonosulfate (PMS) for acetaminophen (ACT) degradation and detoxification. The study provides evidence that PMS activation on the cathode is mainly triggered by superoxide radical (O2-). Factors affecting ACT degradation in the EC/PMS system were evaluated and optimal kinetic constant and lowest energy consumption were determined.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Yunfan Guo, Enzheng Shi, Jiadi Zhu, Pin-Chun Shen, Jiangtao Wang, Yuxuan Lin, Yunwei Mao, Shibin Deng, Baini Li, Ji-Hoon Park, Ang-Yu Lu, Shuchen Zhang, Qingqing Ji, Zhe Li, Chenguang Qiu, Song Qiu, Qingwen Li, Letian Dou, Yue Wu, Jin Zhang, Tomas Palacios, Anyuan Cao, Jing Kong
Summary: In this study, a non-destructive soft-lock drawing method was developed to assemble high-density horizontal arrays of single-walled carbon nanotubes (CNTs). The assembled CNT bundles were then used as nanometer electrical contacts in high-density monolayer molybdenum disulfide (MoS2) transistors, demonstrating their potential for future electronic devices and advanced integration technologies.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Maryam Karimi-Shamsabadi, Mohsen Behpour
Summary: In this study, STS/TNAs and ATS/TNAs hybrid photocatalysts were prepared and characterized, with STS/TNAs showing superior photocatalytic activity for BB41 dye degradation. Optimization of S3TS3/TNAs catalyst resulted in the best photodegradation performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Chengze Yu, Fan Zhang, Kai Wang, Tianlie Luo, Chengzhi Zhou
Summary: Artificial sweeteners, particularly aspartame, have raised concerns due to their widespread use and ecological toxicity. This study investigated the efficient decomposition of aspartame using a Ti3+ self-doped TiO2 nanotube arrays electrode. The results showed that electrocatalysis was highly effective in degrading aspartame, with potential for removing artificial sweeteners from wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Electrochemistry
Fang Wei, Zhenhui Chen, Yue Lin, Qun Qian, Hongyi Jiang, Penghao Su, Dexiang Liao, Daolun Feng
Summary: The study found that using high-frequency cyclic anodization for TNT fabrication can result in longer, larger, and more regular tubes, although the walls of the tubes become thinner. Additionally, higher duty cycles during fabrication improve the photocatalytic degradation performance of TNTs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Bilal Hanif, Guru Karthikeyan Thirunavukkarasu, Viktoriia Liapun, Hryhorii Makarov, Maros Gregor, Tomas Roch, Tomas Plecenik, Karol Hensel, Marcel Sihor, Olivier Monfort, Martin Motola
Summary: This study presents an environmentally friendly synthesis of TiO2 nanotube (TNT) layers and demonstrates their photocatalytic performance and HO radical production rate. The best preparation condition was using AgNO3 as the electrolyte, which resulted in TNT layers with suitable morphological features and crystal structure.
Article
Chemistry, Physical
Huiling Yan, Rong Wang, RuiXi Liu, Ting Xu, Jing Sun, Lizhi Liu, Jianlong Wang
Summary: The CeO2/TiO2 nanotube arrays heterojunction shows excellent antibacterial effects in photocatalytic disinfection, maintaining a high sterilization efficiency even after multiple cycles.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Xinxia Yang, Yang Guo, Feng Cao, Hui Xu, Yifan Liu, Liangjun Yin, Chunhong Mu, Xian Jian
Summary: Plasma-modified FSA catalysts were used to efficiently convert acetylene into CNT arrays with a carbon conversion rate of up to 97.2%. The growth mechanism analysis confirmed the growth mode of CNT arrays and predicted the maximum theoretical yield, offering a solution for large-scale production of CNT arrays.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Yoshinari Kimura, Hironori Tohmyoh
Summary: Many Cu oxide/TiO2 p-n nanojunctions were fabricated by adding n-type TiO2 layers to the fabrication method of p-type Cu oxide nanowires. The presence of p-n nanojunctions at the Cu oxide/TiO2 interface was analyzed through current-voltage and electrochemical impedance measurements. The electrical characteristics depended on the thickness of the TiO2 passivation layer, indicating the conduction through the Cu oxide grain surface, Cu oxide/TiO2 interface, and Cu oxide nanowires.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
David L. White, Brian A. Day, Zidao Zeng, Zachary M. Schulte, Noah R. Borland, Nathaniel L. Rosi, Christopher E. Wilmer, Alexander Star
Summary: The hybridization of a 2-D metal organic framework with single-walled carbon nanotubes has allowed for discrimination of carbohydrates based on molecular size. Liquid gated field-effect transistor devices show improved differentiation capabilities for carbohydrates of varying sizes. Molecular Dynamics calculations reveal decreased ion diffusivity in the presence of different sugars, supporting the proposed sensing mechanism of gate capacitance reduction with carbohydrate molecules in the pores.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Environmental Sciences
Yangyuan Ji, Junfeng Niu, Dong Xu, Kaixuan Wang, Jacob Brejcha, Seunghyo Jeon, David M. Warsinger
Summary: Electrocatalysis is a promising alternative to bacterial denitrification for efficient removal of nitrate and ammonia from sewage. TiO2 nanotube arrays as cathode material can effectively reduce nitrate to ammonia without generating harmful intermediates, and the addition of chloride ions in the solution further oxidizes ammonia to N-2. Key factors influencing the electrocatalytic denitrification include current density, initial pH values, and types of anions, with high removal efficiency achieved under optimal conditions.
