ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 21
·59366-59381
·
IF 5.8
Xiong Huixin,Shi Kun,Han Jie,Cui Can,Liu Yang,Zhang Bailin
Discharge of the untreated dye-containing wastewaters will induce water source pollution and further harm aquatic organisms. In this study, the akaganéite/polyaniline catalyst (β-FeOOH/PANI, about 1.0 μm) could be successfully composed by polyaniline (PANI, (C 6 H 7 N) n , 200–300 nm) and akaganéite (β-FeOOH, FeO(OH) 1−x Cl x , less than 200 nm), according to the identification and characterization results of XRD, Ramon, FTIR, XPS, SEAD, EDS, and FESEM (or HRTEM). Due to PANI providing more photogenerated electrons, the β-FeOOH/PANI composite (compared with β-FeOOH) in photo-Fenton system had the more highly catalytic degradation capacity to Acid Orange II (AOII) under an optimal condition (7.5 mmol/L of H 2 O 2 oxidant, 40 mg/L of AOII, 0.2 g/L of catalyst dosage, and pH 4.0). The AOII degradation kinetics could be well fitted by pseudo-first-order model. In photo-Fenton catalytic process of AOII dye, the ∙OH and h + were the main reaction substances. The AOII in solutions could be gradually mineralized into non-toxic inorganic H 2 O molecule and CO 2 . The β-FeOOH/PANI catalyst also had a good reusable ability of about 91.4% AOII degradation after 4 runs. These results can provide a reference for synthesis of catalyst used in photo-Fenton system and the applications in degradation removal of organic dye from wastewaters.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 21
·e53879
·
IF 3
Lihong Wan,Sitong Yan,Lin Fang,Zhifen Wang,Yucang Zhang
As key platforms for efficient photothermal conversion and water evaporation in solar water desalination processes, the design of photothermal interface materials have become an important topic. In this study, we designed an interfacial solar evaporator with liquefied-chitin PU foams as the base material. In this structure, polyaniline and polypyrrole convert solar energy in thermal energy. After the in-situ generation of hydrogel in the polyurethane foam to reduce the evaporation enthalpy of water and rapid evaporation of water. Liquefied-chitin make a PU foam with low thermal conductivity, reduce the heat loss of the water. Notably, the excellent antibacterial property of liquefied-chitin PU foam can make the photothermal material less likely to grow bacteria in the water and affect the photothermal evaporation efficiency. The water evaporation rates of PANi/PAM and PPy/PAM reached 2.18 and 2.38 kg m −2 h −1 under 1 solar irradiation, with photothermal conversion efficiencies of 136.9% and 149.4%, respectively. This study provides a simple method for converting polymers-based foam into efficient solar thermal materials for solar-driven desalination-related applications.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Jia Qiao,Fei Tao,Guokang Wei,Xiaohui Zhang,Wei Xie,Xin Li,Jianhong Yang
Aluminum ion batteries (AIBs) are currently attracting widespread interest due to their high capacity, low price and high safety, while practical applications are severely hampered by the lack of suitable cathodes and the relatively complex and divergent energy storage mechanisms. Polyaniline has shown considerable promise for application in various rechargeable batteries, however, little research has been conducted on the application to AIBs. Here, the emeraldine base polyaniline (PANI) using a chemical oxidation method is synthesized and then assembled in an Al/PANI cell with a chloroaluminate ionic liquid as the electrolyte. Compared with the conventional protonated polyaniline cathode, the PANI cathode shows better electrochemical performance during the 0–2.4 V charging/discharging process, exhibiting a discharge specific capacity of 155 mAh g -1 at a current density of 1 A g -1 and capacity retention of 80% after 2000 cycles. Meanwhile, ex-situ characterization reveals a novel conversion process of this system different from that of conventional proton-doped polyaniline materials, in which the electrolyte is spontaneously complexed with the PANI cathode. This is followed by reversible doping of the chloroaluminate anion in the –NH- group of the PANI-AlCl 3 complex, yielding high reversible capacity and long cycle life. These findings have made new attempts and laid the foundation for the development of high-performance aluminum ion batteries with conducting polymers as the cathode material and further clarification of their charge storage and reaction mechanisms.
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JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 1
·613-627
·
IF 2.047
Huang Jianfeng,Cai Zhengyu,Zhang Yong,Pei Lizhai
BiPr oxide nanoparticles were successfully synthesized via a facile surfactant-free hydrothermal route using sodium bismuthate and praseodymium nitrate, and polyaniline/BiPr oxide nanoparticles were also obtained. The products were investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy. The obtained nanoparticles with a diameter of about 50–200 nm are composed of polycrystalline structures with rhombohedral Bi 0.4 Pr 0.6 O 1.5 , monoclinic Bi 2 O 3 and monoclinic Pr 5 O 9 phases. Irregular nanoscale polyaniline particles cover the surface of the BiPr oxide. A pair of quasi-reversible cyclic voltammetry (CV) peaks are located at −0.04 V and −0.67 V, respectively, at the BiPr oxide nanoparticle-modified glassy carbon electrode (GCE) in 0.1 M KCl solution with 2 mM l -cysteine. The anodic CV peak shifts positively to +0.14 V and the cathodic CV peak shifts negatively to −0.82 V using the polyaniline/BiPr oxide nanoparticle-modified GCE. The linear range and detection limit are 0.005–2 mM and 1.18 μM, 0.0005–2 mM and 0.16 μM for the GCE modified with BiPr oxide nanoparticles and polyaniline composites, respectively. Polyaniline greatly enhances the electrochemical sensing properties of the BiPr oxide nanoparticle-modified GCE. Graphical Abstract
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ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Lijuan Chen,Fan Chen,Gang Liu,Haoliang Lin,Yu Bao,Dongxue Han,Wei Wang,Yingming Ma,Baohua Zhang,Li Niu
Sweat pH is a critical indicator for evaluating human health. With the extensive attention on the wearable and flexible biosensing devices, the technology for the monitoring of human sweat can be realized. In this study, a sensitive, miniaturized, and flexible electrochemical sweat pH sensor was developed for the continuous and real-time monitoring of the hydrogen-ion concentration in human sweat. A flexible electrode was fabricated on the poly(ethylene terephthalate) (PET) substrate by a simple and low-cost screen-printing technology, which was based on the integration of fluoroalkyl silane-functionalized Ti3C2Tx (F–Ti3C2Tx) and the polyaniline (PANI) membrane technology instead of the traditional ion-sensitive membrane. The surface functionalization strategy for Ti3C2Tx with perfluorodecyltrichlorosilane can provide environmental stability. Functionalized Ti3C2Tx (F–Ti3C2Tx) was doped with PANI to obtain improved responsiveness, sensitivity, and reversibility. The constructed microsize, portable, and wearable F–Ti3C2Tx/PANI pH sensor aimed to real-time monitor the pH value of human sweat during exercise. On-body sweat pH monitoring for females and males, respectively, exhibited high accuracy and continuous stability compared with ex situ analyses. This study thus offers a facile and practical solution for developing a highly reliable MXene-based mini-type pH sensor to realize the online monitoring of human sweat pH.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Fang Bo,Yan Jianmin,Chang Dan,Piao Jinli,Ma Kit Ming,Gu Qiao,Gao Ping,Chai Yang,Tao Xiaoming
The development of continuous conducting polymer fibres is essential for applications ranging from advanced fibrous devices to frontier fabric electronics. The use of continuous conducting polymer fibres requires a small diameter to maximize their electroactive surface, microstructural orientation, and mechanical strength. However, regularly used wet spinning techniques have rarely achieved this goal due primarily to the insufficient slenderization of rapidly solidified conducting polymer molecules in poor solvents. Here we report a good solvent exchange strategy to wet spin the ultrafine polyaniline fibres. The slow diffusion between good solvents distinctly decreases the viscosity of protofibers, which undergo an impressive drawing ratio. The continuously collected polyaniline fibres have a previously unattained diameter below 5 µm, high energy and charge storage capacities, and favorable mechanical performance. We demonstrated an ultrathin all-solid organic electrochemical transistor based on ultrafine polyaniline fibres, which operated as a tactile sensor detecting pressure and friction forces at different levels.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Haihua Wang,Guangyu Hu,Xuan Liu,Liyuan Guo,Xiaorui Li,Ruiyuan Guo,Yanyu Li
The uniform dispersion and long-term stability of hydrophobic polyaniline (PANI) in waterborne polymer matrix always remains a challenge. Here, PANI was chemically modified by 1,12-dibromododecane to prepare functionalized PANI (PANI-12Br(II)), and simultaneously achieve N-alkylation and chemical crosslinking of PANI chains. In addition, 1-bromododecane was utilized to modify PANI to prepare PANI-12Br(I) as a control. The degree of alkylation of PANI-12Br(II) was higher than that of PANI-12Br(I), as well as the content of N + species in PANI-12Br(II). Also, the interaction between the PANI-12Br(II) chains decreased. The colloidal particle size decreased from 703.9 nm to 297.3 nm, and the dispersibility and long-term colloidal stability of PANI-12Br(II) in aqueous system were significantly improved. The water adsorption of as-prepared PANI-12Br(II)/WAR nanocomposite decreased from 18.37% to 4.27%, and the contact angle increased from 63.4° to 112.5°. Compared with WAR and PANI/WAR-0.5%, the coating resistance of PANI-12Br(II)/WAR-0.5% increased by 5 and 4 orders of magnitude, and the corrosion current density decreased by 3 and 2 orders of magnitude. The PANI-12Br(II)/WAR-0.5% displayed better long-term anticorrosive performance than PANI-12Br(I)/WAR-0.5%. The anticorrosive mechanisms were also put forward. The PANI-12Br(II) can be applied as a promising class of corrosion inhibitors in waterborne polymer matrices.
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CURRENT APPLIED PHYSICS
·
2021
·
IF 2.48
Weiyuan Gu,Hongyan Zhang,Chu Chen,Jun Zhang
ZnO/PANI composite humidity sensor was prepared by hydrothermal method . The first principles of density functional theory study the sensing mechanism. The calculation shows that the oxygen vacancy on ZnO surface is beneficial to the adsorption of water molecules. The {0 0 0‾1} crystal plane with the largest lattice oxygen number in ZnO has a strong adsorption capacity for water molecules, which is also conducive to improving the humidity sensitivity. PANI is easy to be combined on {0 1‾1 0} plane of ZnO, and it indirectly promotes the growth of {0 0 0‾1} plane, increasing the adsorption of water molecules and the proportion of H + and H 3 O + ions. In addition, the N–H group in ZnO/PANI enhances the H + conduction, which further improves the performance of the sensor. The results concluded that the proportion of lattice oxygen in humidity sensor is an important factor of humidity sensor sensitive detection.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Kai Wang,Zhongfa Cheng,Pengfei Li,Yiwei Zheng,Zhen Liu,Liang Cui,Jiangtao Xu,Jingquan Liu
A promising approach to resolving insufficient freshwater resources is utilizing solar energy for steam generation. Although various types of photothermal conversion materials have been developed, there are still some obstacles, such as complicated system structure fabrication and low energy utilization, that severely hinder their practical application. Herein, we designed and produced a self-floating porous carbon/polyaniline foam (PCPF) evaporator via impregnating melamine foam with porous carbon generated following the bottom-up pyrolytic method and polyaniline , followed by thermal treatment, for efficient solar steam generation. The PCPF obtained with a porous carbon (PC) to polyaniline (PAN) mass ratio of 3:5 (PCPF-3) exhibited a rich pore structure , good hydrophilicity , low thermal conductivity (0.0413 W m −1 K −1 ), and excellent light absorption (96.1%). Our results show that, without additional thermal insulators , the evaporation rate of PCPF-3 reached 1.496 kg m −2 h −1 , and the photothermal conversion efficiency reached 87.3% under one sun irradiation. Furthermore, it also exhibited good durability and desalination performance. This type of environmentally friendly, low-cost, and stable photothermal conversion material could be used in water treatment and seawater desalination.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Huizhu Ren,Qing Han,Shupei Zhang,Yitian Huang,Yanjie Chen,Hong Dai,Jianying Yan,Yanyu Lin
Herein, a photothermal in-situ amplified electrochemical immunoassay based on multifunctional probe for detecting autoimmune hepatitis marker was constructed. The immunoassay followed a sandwich protocol, helical carbon nanotubes (HCNTs) and polyaniline (PANI) composite provided a desirable substrate for the immobilization of massive primary antibody (Ab 1 ). Subsequently, the multifunctional probe, by utilizing Chitosan (CS) modified AgI nanohybrids (AgI NHs) labeled secondary antibody (Ab 2 ), were simply designed for the first time. To be specific, AgI NHs were not only directly served as signal readout, but also as amplifier further enhanced electrochemical signal. Under the near-infrared (NIR) laser irradiation, electrochemical reaction was significantly accelerated on electrode in situ due to the extraordinary photothermal conversion capability of AgI NHs. Therefore, the evidently improved sensitivity together with enhanced signal-to-noise ratio of immunoassay was achieved in the short time by precise-controlling of NIR laser irradiation. Under the optimal conditions, the developed electrochemical immunoassay realized sensitive and specific detection of autoimmune hepatitis marker from 10 −4 ng/mL to 1 ng/mL with low detection limit of 3.3 × 10 -5 ng/mL. Importantly, this work provided a promising prospect for the application of photothermal effect coupled with electrochemical immunoassay and opened up a new pathway for signal amplification.
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Chemistry-An Asian Journal
·
2020
·Vol. 15
·期 10
·1544-1548
·
IF 4.056
You Zhang,Jie Liu,Zhengsong Fang,Xiaofeng Lin,Wenchao Zhang,Dingshan Yu
Graphical An efficient self-standing metal-free polyaniline @carbon nanotubes (PANI@CNTs) membrane catalyst is designed and synthesized via a facile solution casting approach. Without introducing any heteroatoms into carbon lattices, the newly-produced composite catalyst exhibits remarkably improved oxygen evolution activity relative to pure CNTs. Notably, it can be directly used as an additive-free bifunctional oxygen electrode to endow a Zn-air battery with good charge/discharge performance. A facile design and fabrication of self-standing metal-free polyaniline (PANI)@carbon nanotubes (CNTs) composite membrane was initially proposed by straightforward noncovalent wrapping the polymer around pure CNTs. Without introduction of extra heteroatoms into CNTs, the optimized PANI@CNTs composite exhibits a much better electrocatalytic performance for oxygen evolution reaction (OER) than pure CNTs via favorable interfacial modification with PANI to largely expose the active sites of on the surface of pure CNTs. Besides, it displays good oxygen reduction reaction (ORR) performance. When directly utilized as bifunctional air electrode without extra additive agents, the composite membrane-enabled rechargeable Zn-air batteries not only deliver a high peak power density (201.9 W g −1 ) and a large energy density (850.3 Wh kg Zn −1 ), but also present robust cycling performance for 216 cycles with a high energy efficiency of 57.8%.
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Advanced Materials Technologies
·
2019
·Vol. 4
·期 11
·1900564
·
IF 5.395
Chao Lu,Xi Chen
Flexible supercapacitors with merits of lightweight, flexibility, and large power density are promising energy storage candidates for portable and wearable electronic devices. Flexibility of electrode materials is critical to their performance, which can be optimized by the screening of soft materials and an effective morphology control strategy. Here, polyaniline (polyacrylonitrile (PANI)) nanofiber networks through a simple electrospinning method are reported, with superior mechanical and electrochemical properties for flexible supercapacitors. The 1D structure of nanofiber networks not only provides robust mechanical properties but also facilitates charge transport during charge–discharge dynamics. The PANI nanofiber electrode shows a tensile modulus of 89.8 MPa and break elongation of 5.89%, which exceed those of its bulk counterpart. The PANI nanofiber-based supercapacitor exhibits a high specific capacitance of 134 F g −1 at a current density of 1 A g −1 and good rate capability under current densities ranging from 1 to 10 A g −1 . It shows an excellent working stability with a capacitance retention of 85.6% even after 20 000 cycles. Moreover, the device delivers stable capacity under various flexible conditions, including bending, twisting, and elongation. It is noteworthy that the performance of the device changes negligibly after 500 bending cycles under a bending angle of 180°, displaying great potential for practical applications in flexible electronics.
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