Article
Energy & Fuels
Zhi-Ming Shen, Xiao-Jing Luo, Yan-Yan Zhu, Yong-Sheng Liu
Summary: In this study, 3-D nanosheets of NiO-CoO and PPy composite materials are successfully synthesized on the surface of carbon cloth as a supercapacitor electrode using facile AC co-electrodeposition method. The electrode exhibits excellent specific capacitance and cyclic stability, while the asymmetric supercapacitor assembled with this electrode shows high energy density.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biochemistry & Molecular Biology
Zhenjiang Lu, Wenjin Qin, Juan Ma, Yali Cao, Shujuan Bao
Summary: In this study, a new sandwich-structured Pd/polypyrrole-graphene/Pd (Pd/PPy-Gns/Pd) electrode was prepared using a simple constant potential electrodeposition technique. The electrode showed fast charge/mass transport rate, high electrocatalytic activity, and great stability for formic acid electro-oxidation (FAO) due to the embedding of Pd nanoparticles on the PPy-Gns support and the introduction of graphene to improve conductivity and electron transfer.
Article
Chemistry, Physical
Min Zhong, Di Guo, Xiangyu Meng, Lijun Bian, Yu Song, Xiaoqi Sun, Xiaoxia Liu
Summary: This study demonstrates the fabrication of a PPy-FeOx composite film on a 3D exfoliated graphite current collector using a simple and fast electrodeposition method, leading to enhanced pseudocapacitance and cycling stability. The hybrid iron oxide phase interface synergistically improves the pseudocapacitance of the composite film.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Electrical & Electronic
Shuigen Li, Xiangyu Xie, Jianxia Zheng, Quanping Xu, Rong Li, Minghui Xiong, Jian Xiong
Summary: In this paper, a low temperature and high pressure hydrothermal reaction system was designed. Urea was used as the reducing agent and nitrogen source for graphene oxide (GO), as well as the ammonium source for NH4NiPO4. Ammonium dihydrogen phosphate served as both the ammonium and phosphorus source, while nickel nitrate was used as the nickel ion source. The NH4NiPO4@rGO powder was characterized using various techniques, and a smooth modified layer of NH4NiPO4@rGO/GCE was prepared. The electrochemical properties of NH4NiPO4@rGO/GCE were evaluated, confirming its high sensitivity to glucose, low detection limits, wide linear range, stability, and selectivity towards glucose.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Anjana Anandan Vannathan, Pranay R. Chandewar, Debaprasad Shee, Sib Sankar Mal
Summary: Metal-oxide impregnated conducting polymers have become a popular choice for electrode materials due to their superior stability. In this study, a novel composite electrode PV4W8/PPy was successfully synthesized by incorporating a metal-oxide cluster called polyoxometalate into the polypyrrole matrix. The resulting composite electrode exhibited improved ion transfer and excellent cycle stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Chunyan Wang, Zhenzhen Liu, Qin Wang, Jianyu Guo, Qingfei Zhao, Yan Lu
Summary: The new MnO2@polypyrrole mesoporous composite with hollow microsphere structure exhibited a high specific capacitance value in Na2SO4 solution and showed excellent capacitance retention rate after long cycles of charge/discharge testing. In an asymmetric supercapacitor, it displayed high energy density and power density, indicating its potential as electrode material for supercapacitor applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Fateh Mayouf, Mohamed Hamidouche, Naima Maouche, Hafsa Cherif-Silini, Amel Balla
Summary: This research paper presents a fast method for the double pulse electrodeposition of silver nanoparticles on a thin polypyrrole film to improve its electrical conductivity and antibacterial activity for biomedical applications. Lower AgNO3 concentration and shorter pulse durations result in nanometric Ag particles with the most homogeneous size and distribution on the PPy surface, showing the highest electrical conductivity and the strongest killing efficiency against bacteria.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Dong Wang, Xing Zhou, Renfang Song, Changqing Fang, Zhen Wang, Chenxi Wang, Yingwei Huang
Summary: This study demonstrates the design and fabrication of flexible electronic sensors using biomimetic microstructures from natural lotus leaves and freestanding polypyrrole/silver hybrid films to detect pressures, stretching, and bending forces. The sensors exhibit high sensitivity and multifunctionality, showing promise for future applications in wearable electronics and human-machine devices.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Ji Huang, Huiling Gu, Na Li, Hua Yang, Gang Chen, Lizhu Zhang, Chengjun Dong, Hongtao Guan
Summary: In this study, an organic conjugated system based on polypyrrole/hydrazone Schiff base composite was synthesized and its electromagnetic behavior was investigated. The results showed that the composite exhibited excellent electromagnetic absorption performance and the electromagnetic response behavior was explained by models. Additionally, the morphology transformation and formation mechanism of the composite were studied.
Article
Chemistry, Multidisciplinary
Hansa Mahajan, Seongjae Cho
Summary: Metal-oxide nanomaterials have attracted great interest due to their novel characteristics. In this study, a fascinating Au nanorod/cuprous oxide core-shell composite was synthesized for energy storage applications in a supercapacitor. The composite exhibited high specific capacitance and durable cycling stability, attributed to the presence of AuNR in the core.
Article
Chemistry, Multidisciplinary
A. Nagarajan, V. Sethuraman, T. M. Sridhar, R. Sasikumar
Summary: A glassy carbon electrode modified by Au@NiO decorated polypyrrole nanocomposite (Au@NiO/PPy-GCE) was fabricated for non-enzymatic electrochemical sensing of cholesterol. The composite was characterized using XRD, XPS, FE-SEM, and TEM. Cyclic voltammetry was used to investigate the redox properties of cholesterol. Differential pulse voltammetry showed a linear range from 1.0 x 10-5 to 1.0 x 10-4 M, with a sensitivity of 7.6 mu A mu M-1 cm-2 and a detection limit of 5.8 x 10-7 M. Therefore, this composite has excellent practical applications for commercial sensors.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yinbo Wu, Yaowei Feng, Xiulian Qiu, Fengming Ren, Jian Cen, Qingdian Chong, Ye Tian, Wei Yang
Summary: A polyhedral hollow structure of cobalt selenide (CoSe2) was synthesized using metal-organic bone MOFs (ZIF-67) as template and precursor. CoSe2 was coated with conductive polymer polypyrrole (PPy) to improve its electroconductibility and limit the outflow of polysulfide compounds. The prepared CoSe2@PPy-S composite cathode showed high reversible capacities and good cycle stability. The structure of CoSe2 and the coating of PPy enhanced the electrochemical performance of the lithium-sulfur cathode material.
Article
Chemistry, Analytical
Deivasigamani Ranjith Kumar, Ganesh Dhakal, P. Muhammed Shafi, Mostafa Saad Sayed, Jintae Lee, Yong Rok Lee, Jae-Jin Shim
Summary: In this study, a reagentless selective sodium sulfite food-additive sensor was successfully developed using Au nanoparticles and a chemical/electrochemical approach. The composite electrode exhibited a wide linear range of detection and high sensitivity and detection limit. The sensor showed good recovery when applied to food samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Xiaohua Wang, Chengyun Zhang, Xilin Zhou, Zhengkun Fu, Lei Yan, Jinping Li, Zhenglong Zhang, Hairong Zheng
Summary: Noble metal nanostructures generate strong surface plasmon resonance in the visible light region, which can promote chemical reactions and serve as photocatalytic materials. The catalytic efficiency and stability of Ag/Au nanoislands and Ag NIs/Au film composite systems were greatly improved compared to Ag NIs. The metal nanoislands also generate localized heat at low temperatures, enabling the transition of NaYF4:Eu3+ to Y2O3:Eu3+ and ensuring the relative stability of the constructed complex.
Article
Engineering, Mechanical
Mehdad Fathi, Mir Saman Safavi, Soheil Mahdavi, Sahand Mirzazadeh, Vahid Charkhesht, Ali Mardanifar, Mostafa Mehdipour
Summary: This study evaluates the tribological behavior of electrodeposited Co-P-MoS2 films with different loadings of MoS2 nanoparticles and current densities. The Co-P-10 g/L MoS2 film obtained at 25 A dm-2 shows the highest wear resistance with an increase in microhardness by 18%, a decrease in coefficient of friction by 50%, and a decrease in wear volume loss by 95%.
TRIBOLOGY INTERNATIONAL
(2021)
