Article
Chemistry, Physical
Mingchao Zhang, Xin Sui, Xin Zhang, Mang Niu, Cuiqing Li, Haiqin Wan, Zhen-An Qiao, Haijiao Xie, Xingyun Li
Summary: By using a mechano-chemical strategy with Na assisted milling, a multi-defective spinel catalyst D-NiCo2O4 was developed, which exhibited significantly elevated oxygen vacancies, raised active oxygen species, enhanced oxygen mobility, and increased specific surface area. This catalyst showed superb activity for propane catalytic oxidation, outperforming pristine NiCo2O4 and Co3O4 catalyst, making it one of the most outstanding non-noble metal catalysts for propane oxidation. This work set a paradigm for enhancing the VOCs oxidation performance of metal oxide catalyst by multi-defects engineering.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Vienna Wong, Xiaoran Zheng, Yue Jiang, Sajjad S. Mofarah, Charles C. Sorrell, Pramod Koshy
Summary: A template-free method was used to fabricate undoped, Cr-doped, and S-doped mesoporous ceria nanostructures. The optimal ratio of cerium coordination polymer to triethanolamine (TEA) for exfoliation was determined to be 30 mg:0.35 mL. The introduction of dopants and heterojunction formation resulted in defects and improved photocatalytic performance. Cr-doped CeO2-x showed the highest photocatalytic performance, while S-doped CeO2-x exhibited lower performance due to reduced porosity from microstructural densification.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Yan Zhang, Min Zhang, Meng Wang, Caixia Liu, Qingling Liu, Weichao Wang, Ziyin Zhang, Rui Han, Na Ji
Summary: Traditional catalyst design relies on trial-and-error experiments, but we have developed a new strategy to evaluate catalyst performance using computational methods, which has been validated by experiments. Ce doping significantly enhances the catalytic activity of the catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Thermodynamics
Keisuke Akita, Youhi Morii, Hisashi Nakamura, Takuya Tezuka, Kaoru Maruta
Summary: The study utilized numerical simulation to reproduce flames with repetitive extinction and ignition in a micro flow reactor. It was found that the ignition of hot flames originated from residual CO in the previous cycle, and several heat release rate peaks related to different flames were observed between extinction and ignition locations.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Chemistry, Physical
Tongfei Yang, Pengrong Ren, Xiangcheng Qi, Xin Wang, Qingnan Meng, Zhiyong Liu, Shu Yang
Summary: In this study, NaNbO3 powders were prepared using a hydrothermal method. The particle size of NaNbO3 decreased unexpectedly with increasing reaction temperature, indicating a nucleation-dominated growth mechanism. The sample reacted at 210 degrees C for 12 h showed the highest piezoelectric catalytic efficiency. The annealing of NaNbO3 powders in N2 increased the concentration of oxygen vacancy, as confirmed by impedance and XPS spectra. Simulation results showed that under the influence of oxygen vacancies, valence electrons of A-site Na cations on the surface were more easily excited to the conduction band compared to Nb cations, resulting in a more than 6 times increase in piezoelectric catalytic efficiency.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Raquel Aymerich-Armengol, Paolo Cignoni, Petra Ebbinghaus, Julia Linnemann, Martin Rabe, Kristina Tschulik, Christina Scheu, Joohyun Lim
Summary: This study describes the mechanism of transformation from 2D δ-MnO2 nanosheets to γ-MnO2 nanocone morphology and reveals the role of Fe galvanic exchange reaction in this transition. The mechanistic insights into the morphology/phase transition were obtained through systematic electron microscopy studies, where the effect of local chemical composition and the oxidation state of Mn ions played key roles. This research is of great significance for understanding the growth and morphology/phase transitions of manganese oxide nanostructures, as well as the rational design of nanomaterials.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Li Gao, Xiankun Zhang, Huihui Yu, Mengyu Hong, Xiaofu Wei, Zhangyi Chen, Qinghua Zhang, Qingliang Liao, Zheng Zhang, Yue Zhang
Summary: Two-dimensional (2D) MoS2 is a promising channel material for next-generation integrated circuit (IC) transistors. However, the reliability of MoS2 is compromised by vacancy defects, particularly sulfur vacancies (V-S). Understanding the impact of these defects on transistor reliability has been challenging. In this study, we establish a simulated initiator to track the evolution of vacancy defects in MoS2 and their influence on transistor reliability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Leilei Miao, Xiaolong Tang, Shunzheng Zhao, Xizhou Xie, Chengcheng Du, Tian Tang, Honghong Yi
Summary: This study focuses on achieving high catalytic performance for the oxidation of VOCs by synthesizing nearly all-surface-atomic, ultrathin two-dimensional Co3O4 nanosheets. The nanosheets exhibit superior catalytic activity due to a multitude of active sites and high electron mobility, with transient absorption spectroscopy revealing the role of oxygen vacancy defects in enhancing electron lifetime. The presence of defects and unique surface features on the nanosheets contributes to their exceptional catalytic performance compared to traditional thermocatalysts.
Article
Chemistry, Physical
Yang Zhao, Di Wu, Ying Chen, Yang Li, Xiaobin Fan, Fengbao Zhang, Guoliang Zhang, Wenchao Peng
Summary: This study demonstrates that nitrogen-doped graphene with structural defects can effectively activate peroxymonosulfate for bisphenol A degradation. The synergistic effect between doped nitrogen atoms and created structural defects enhances the catalytic performance. The nonradical pathway is proposed to play the dominant role in the PMS activation process.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Kyubin Shim, Kyeong-Deok Seo, Hae Jin Kim
Summary: This study proposes a method to synthesize a Mn2+- coordinated polymer precursor ligated by sulfur atoms with acetate counter ions. MnS/MnO decorated N, S-doped carbon nanoparticles are prepared by calcination of the Mn ion-coordinated polymer for the practical applications of catalytic reactions. The performance of the nanoparticles in catalytic oxidation reactions is mainly related to the MnO decorated outside the SNC particles compared to MnS formed inside the particles.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Thermodynamics
Cheng Xie, Maxence Lailliau, Gani Issayev, Qiang Xu, Weiye Chen, Philippe Dagaut, Aamir Farooq, S. Mani Sarathy, Lixia Wei, Zhandong Wang
Summary: Benefitting from instrumental analysis methods, this study investigates the low temperature oxidation of n-heptane to gain insight into alkane low temperature oxidation chemistry. The results contribute to reducing deviations between model predictions and experimental measurements, and provide a comprehensive kinetic model for n-heptane oxidation.
COMBUSTION AND FLAME
(2022)
Article
Environmental Sciences
Peng Tang, Wei Huang, Dun Wang, Zhongxin Liu, Jieqiong Wang
Summary: In this paper, a simple vacuum filtration method was used to fix a photocatalyst on a membrane surface, solving the problem of catalyst recovery. The synthetic membranes were able to filter and degrade contaminants, addressing the issues of reduced separation efficiency and shortened membrane life. The K-birnessite MnO2 photocatalytic film showed excellent catalytic activity for the degradation of methylene blue (MB), providing a new method for efficient and low energy consumption wastewater purification.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Thermodynamics
Yifan Jiang, Fengqi Zhao, Ming Zhang, Hexin Liu, Hui Li, Zhao Qin, Jiankan Zhang
Summary: The effect of oxygen defects in a novel Cu2O1-x nanocombustion catalyst on the thermal decomposition properties and kinetics of AP was studied for the first time. The Cu2O1-x catalyst with abundant oxygen vacancy defects exhibited enhanced catalytic activity for the AP thermal decomposition. DFT calculations found that the oxygen vacancy defects on the Cu2O1-x nanocatalyst surface can promote the adsorption and complete oxidation of NH3, which may adsorb on the surface of AP and restrain its thermal decomposition during low-temperature decomposition process.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Zicheng Zhai, Wenliang Wang, Kaixu Ren, Haifeng Shi
Summary: In this study, a 2D/2D black-BiOCl/Fe2O3 photo-Fenton catalytic system was successfully constructed via a hydrothermal synthesis process, exhibiting high degradation efficiency. Additionally, a rational photo-Fenton catalytic mechanism was proposed, offering new insights into photocatalytic systems for water contaminant treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Environmental
Xiaotian Mu, Honglei Ding, Weiguo Pan, Qi Zhou, Wei Du, Kaina Qiu, Junchi Ma, Kai Zhang
Summary: Acetone, a typical volatile organic compound, is mainly discharged into the atmosphere through various sources and poses a threat to the environment and human health. Catalytic oxidation is an effective method for removing acetone, and developing low-cost, high-efficiency catalysts can bring economic benefits. Manganese-based and cobalt-based catalysts are considered good substitutes for expensive platinum-based and palladium-based catalysts, with key factors including oxygen vacancies and active oxygen species.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)