Nanomaterials
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2019
·Vol. 9
·期 8
·1109
·
IF 4.034
Fa-Gui He,Jia-Yi Yin,Gaurav Sharma,Amit Kumar,Florian J. Stadler,Bing Du
A hierarchical composite based on the modified reduced graphene oxide with platinum-nickel decorated polyaniline nano-spheres (rGO/PANI@PtNi) was facilely prepared via microwave-assisted self-reduction for an application in nonenzymatic hydrogen peroxide (H2O2) detection. Compared to the pristine rGO, the composite exhibited a much tougher surface due to the stacking of conductive PANI nano-spheres on rGO sheets, leading to good dispersion of PtNi nanoparticles and a large active area. Furthermore, the multi-valance Ni2+/3+in the PtNi particles effectively promoted the catalytic property of Pt sites and facilitated a superior electrochemical performance of PtNi alloy than that of neat Pt. Owing to the synergistic effect of the improved electrical conductivity and the promoted electrocatalytical property, the modified glassy carbon electrode (GCE) with rGO/PANI@PtNi nanocomposite displayed an outstanding electrochemical sensitivity towards H2O2with a fast response time (<2 s), a wide linear range (0.1–126.4 mM), a low detection limit (0.5 µM), as well as a long-life stability for one week without obvious degradation. This novel strategy opens a novel and promising approach to design high performance sensors for H2O2detection.
研究领域:
材料科学
·
生物医学工程
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NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 10
·4931-4937
·
IF 3.159
Wei Xu,Yu Wang,Su Liu,Jinghua Yu,Hongzhi Wang,Jiadong Huang
In this work, we report a novel sandwich-type electrochemical aptasensor for sensitive and selective detection of antibiotic kanamycin. This aptasensor was constructed by assembling graphene–polyaniline (GR–PANI) and polyamidoamine dendrimer–Au nanoparticle (PAMAM–Au) nanocomposites on the surfaces of a glass carbon electrode, which as electrode materials exhibited excellent charge-transport property and loading capacity of biomolecules. Followed by the sandwich-type specific identification, kanamycin detection was realized by outputting a redox current from electro-reduction reaction of H2O2 catalyzed by HRP. It was demonstrated that the developed strategy had a wide linear response range from 5 × 10−6 to 4 × 10−2 μg mL−1 and a low detection limit of 4.6 × 10−6 μg mL−1. Additionally, this aptasensor had the advantages in its low cost, high sensitivity, and superb specificity. Thus, it might provide a useful tool for kanamycin determination and related food safety analysis and clinical diagnosis.
研究领域:
分析化学
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食品安全
·
临床诊断
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Mengman Weng,Jingtao Su,Jiahui Lin,Jintao Huang,Yonggang Min
Nowadays, green energy conversion and storage materials are the research attention. Reusable stability is an important indicator in the application. In this work, the framework material formed by polyaniline (PANI) and MXene shows strong intrinsic light absorption performance and outstanding cycling stability for the solar-light to thermal energy conversion. With composition of polyethylene glycol (PEG) and PANI/MXene, a series of composite phase change materials were prepared, exhibiting great reusable capacity for solar light response and thermal energy storage . In this system, PM24 (n (PANI) : n (MXene) = 100:24) shows the best comprehensive performance. During melting and freezing process, its latent heat values are as high as 150.93 J/g and 146.6 J/g, respectively, and the corresponding enthalpy efficiency are 90.1% and 89.6%, respectively. After ultra-long 1000 heating-cooling cycles, only 2.91% and 2.87% enthalpy rate loss of melting and freezing, indicating its superior cycling stability. Furthermore, with excellent solar light absorption capacity , the solar-to-thermal conversion efficiency of PM24 exceed 95.29%, and it also keeps stable reusability . Hence, PM24 exhibits a huge potential in terms of heat storage and photothermal conversion for long-term use.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 3
·1-10
·
IF 5.7
Tang Juan,Liu Liping,Wang Haiyang,Cheng HongLi,Qin Jiao,Zeng Zhiyao,Lin Youxiu,Tang Dianping,Pu Shouzhi
A flexible photoelectrochemical (PEC) biosensor is proposed for the sensitive detection of ochratoxin A (OTA) based on glucose oxidase (GOx)-encapsulated target-responsive hydrogel, using Fenton reaction-mediated in situ formation of polyaniline (PANI) as signal amplified strategy. The target-responsive DNA hydrogels with high loading capacity can carry a large amount of GOx, which not only avoids laborious labeling process but also enhances the analytical performance. Upon introduction of target molecules, the hydrogel can be opened, and multiple GOx was released, thus producing lots of H 2 O 2 via catalytic reduction of glucose. As a component of the Fenton reagent, H 2 O 2 can react with the Fe 2+ on the graphene oxidase-PAMAM-Fe 2+ (GO-PAMAM-Fe 2+ ) to generate Fe 3+ and ·OH. This in turn can oxidize aniline and generate polyaniline (PANI), resulting in the enhancement of the photocurrent signal of GO-MoS 2 -CdS photoelectrode. The GO-PAMAM-Fe 2+ as the neighborhood component of GO-MoS 2 -CdS-based photoactive material not only can increase the loading amount of Fe 2+ , but also can inhibit the decrease of photocurrent of GO-MoS 2 -CdS by direct modification of Fe 2+ on the photoactive material. Moreover, the high loading capacity of DNA hydrogel can efficiently promote the performance of the PEC biosensor. The PEC biosensor exhibited satisfactory analytical performance for OTA with a linear range of 0.0001–0.1 ng/mL and a low detection limit of 0.05 pg/mL. It presents recommendable specificity, stability, and practical applications. Importantly, the PEC biosensor provides a new concept for construction of PEC biosensing platform. Graphical abstract
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PubMed
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EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Liying Wan,Peijie Li,Meiling Yan,Jianhong Wang,Xibao Li
Conductive hydrogels have attracted much attention in soft electronic devices. However, it is still a challenging to be integrated with outstanding mechanical performance, self-healing, shape memory and conductive capability. Herein, we developed a multifunctional conductive hydrogel via interpenetrating network (IPN) and multiple hydrogen bond interaction. Poly (acrylic acid)-polyaniline (PAA-PANI) and polyvinyl alcohol (PVA) form bones of IPN through chemical and physical double cross-linking. Chemically crosslinking of IPN was obtained by in situ polymerization of acrylic acid and aniline. Physical crosslinking is realized by more multiple hydrogen bonds (N–H···O, O–H···O, O–H···N, N–H···N) interaction among PVA, polydopamine and PF127 diamino oxygen derivatives. PANI forms a conductive path in the IPN to ensure its conductivity. IPN hydrogels with multiple hydrogen bonds has excellent mechanical strength, which is much higher than conventional conductive hydrogels. Moreover, the structure endowed the hydrogel low swelling property, good self-healing and thermal-responsive shape memory effect. The multifunctional IPN conductive hydrogel have potential applications in smart devices including self-healing electronic devices, soft robot, and sensors.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Chuang Wang,Yiqi Liao,Hou-Yong Yu,Yanjuan Dong,Juming Yao
Fiber-based wearable electronic textiles have broad applications, but non-degradable substrates may contribute to electronic waste. The application of cellulose-based composite fibers as e-textiles is hindered by the lack of fast and effective preparation methods. Here, we fabricated polyaniline (PANI)/cellulose fibers (PC) with a unique skin-core structure through a wet-spinning homogeneous blended system. The conductive network formation was enabled at a mere 1 wt% PANI. Notably, PC15 (15 wt% PANI) shows higher electrical conductivity of 21.50 mS cm −1 . Further, PC15 exhibits excellent ammonia sensing performance with a sensitivity of 2.49 %/ppm and a low limit of detection (LOD) of 0.6 ppm. Cellulose-based composite fibers in this work demonstrate good gas sensing and anti-static properties as potential devices for smart e-textiles.
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PubMed
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yingying Feng,Haiyan Li,Mingjun Zhang,Jiaying Jin,Beiyao Zhang,Yong Wang,Zhike Li
Benzotriazole-loaded polydopamine/polyaniline (BTA@PDA/PANI) microcapsules are prepared vis the combination of a hard template method and in-situ polymerization. The PDA/PANI hollow microspheres are first prepared using SiO 2 as a hard template and etching them with hydrofluoric acid . The BTA corrosion inhibitor is then loaded into the PDA/PANI hollow microspheres to obtain the BTA@PDA/PANI microcapsules. The mean particle size and shell thickness of the synthesized microcapsules are 8.3 and 2.1 µm, respectively. The load capacity of BTA is above 20 wt%. The corrosion resistance of epoxy coatings with different contents and types of microcapsules is compared by saline immersion and electrochemical impedance tests. A scratched coating with 1 wt% BTA@PDA/PANI microcapsules has the best anti-corrosion effect. The synergistic anticorrosion mechanism of BTA, PDA and PANI is revealed and confirmed.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 8
·087506
·
IF 4.386
Bolu Sun,Chengyang Gao,Lin Yang,Hongxia Shi,Lei Kan,Quhuan Ma,Xiaofeng Shi
Identification and quantification of epigoitrin (EP) in some herbs and traditional Chinese medicine (TCM) preparations are critical to pharmacokinetic study and pharmaceutical quality control due to its distinct antiviral activity. So, developing highly sensitive and selective method for detection of EP is essential for clinical treatment and drug development. In this study, a novel molecularly imprinted electrochemical sensor for detection of EP was firstly constructed. With acrylamide imprinting systems, surface imprinting on the polyaniline functionalized graphene oxide was employed to prepare molecularly imprinted polymer by electro-polymerization, which follow-up constructed afford specific binding cavities, endowing the exclusive recognition ability. Furthermore, the polyacrylamide chain is anchored to the polyaniline chain by covalent bonds, which is beneficial for raising electrochemistry signal. Under the optimized condition, the sensor demonstrates a linear wide range of 4.6 × 10−7 mol l−1 ∼ 4.6 × 10−5 mol l−1 with a correlation coefficient of 0.9953 and a low LOD of 8.21 × 10−8 mol l−1 (S/N = 3). Additionally, the sensor showed good stability, repeatability (RSD 1.52%) and selectivity. The method was applied to analyze EP in the extraction from Isatidis Radix with a recovery higher than 97.8% and RSD less than 1.81%. This work provided a novel strategy for on-site, real-time and rapid detection of indicator components from TCM.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Like Ouyang,Yuan Wang,Ping Zhang,Xinlong Wang,Shaojun Yuan
Arsenite contamination in groundwater seriously impairs human health due to its high mobility and toxicity. Herein, a novel heterostructured MWCNTs@PANI@TiO2 nanocomposite was synthesized via a one-pot polymerization process for the adsorption and photocatalytic oxidation of As(III) from aqueous solution. In the dark, the as-synthesized nanocomposite had a high adsorption capacity of As(III) at about 0.29 mmol·g–1 with an initial As(III) concentration of 0.067–0.801 mmol·L–1 at 298.15 K and exhibited a stable adsorption capacity in a wide pH range of 2–9. The adsorption kinetics of As(III) on MWCNTs@PANI@TiO2 was in accordance with the PSO model and was mainly controlled by chemical adsorption. Under visible light irradiation, the adsorption amount of As(III) on MWCNTs@PANI@TiO2 was substantially enhanced by about 57%, and the photocatalytic conversion of As(III) to As(V) was found to be caused by the photogenerated holes and superoxide free radical (•O2–). The hypothesized adsorption mechanisms of As(III) and As(V) ions on the nanocomposite were possibly ascribed to surface complexation and hydrogen-bonded interactions. The heterostructured MWCNTs@PANI@TiO2 nanocomposite offers a promising candidate for highly efficient removal of As(III) ions from arsenite-polluted groundwater.
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JOURNAL OF MATERIALS RESEARCH
·
2020
·Vol. 35
·期 10
·1316-1328
·
IF 2.502
Lele Wang,Shanshan Chen,Pengcheng Wu,Keliang Wu,Jianning Wu,Guihua Meng,Juan Hou,Zhiyong Liu,Xuhong Guo
This work demonstrates a double-step method, a simple chemical bath deposition and an in situ polymerization process, to synthesize the stable structure of a composite of Polyaniline/BiVO4/cellulose aerogel (PBC) in wastewater treatment. The poor stability of the carrier catalyst was improved significantly by forming a dense film of polyaniline (PANI) through polymerization on BiVO4/cellulose aerogel (BC). The developed three-dimensional porous structure enhanced photocatalytic stability. For instance, photocatalytic degradation of a dye, methylene blue, reached to 91.67% under the eight times successive irradiation of the visible light. The resulted fine performance could be owed to the strong adsorption of cellulose aerogel, uniform spreading of BiVO4, and the speedy electron separation efficiency of PBC. Moreover, the photocatalytic mechanisms including the role of the free radicals (•OH and •O2−) of the developed PBC were also discussed. The novel structure may present a new insight into the development of the carrier catalyst.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Xueqing Xu,Ruxue Liu,Yuhan Cui,Xixi Liang,Cheng Lei,Shuangyan Meng,Yali Ma,Ziqiang Lei,Zhiwang Yang
Metal-organic frameworks (MOFs), a new class of porous crystalline materials, have attracted great interest as fascinating applications for eco-friendly photocatalysts. In this study, new hybrid MOFs, iron doped zirconium based metal-organic frameworks, FeUiO-66, were successfully synthesized by hydrothermal method firstly. Then the PANI/FeUiO-66 nanohybrids were fabricated through annealing process. The photocatalytic performances of the obtained PANI/FeUiO-66 nanohybrids were evaluated by selectively oxidation of various alcohol substrates using molecular oxygen as a benign oxidant. Boosting by synergistically multi-doped effect, the catalytic activity of the novel PANI/FeUiO-66 is remarkably higher than that of bare UiO-66 under visible light irradiation at ambient temperature. Further analyses revealed that the enhancement of photocatalytic activity originated from the two aspects. On one hand, when the Fe doped into the framework, valence fluctuation of Fe 2+ /Fe 3+ could reduce the recombination rate of photoexcited carriers. On the other hand, based on energy band matching between FeUiO-66 and PANI, the easily formed heterostructures from PANI and FeUiO-66 can efficiently enhance the separation of photogenerated carriers. Furthermore, by virtue of unique advantage of the position of the CB and VB of FeUiO-66, alcohols could be selectively oxidized by the O 2 − and h + . Remarkably, it is expected that the MOF-conductive conjugated polymers nanohybrids could be used as efficient visible light driven photocatalysts for organic transformation with high selectivity under eco-friendly conditions.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Rui Zhang,Jianxun Zhao,Wanqiang Liu,Lianshan Sun,Qingcheng Liang,Peng Chen,Xinwei Wang
Mechanical alloying is used to prepare Co 0.9 Cu 0.1 Si hydrogen storage alloy. Coral-like polyaniline (PANI) and NiO nanoparticles (NiO NPs) are synthesized separately. In order to improve the electrochemical properties of the alloy, polyaniline, NiO NPs and graphene oxide (GO) are doped into the alloy via mechanical alloying to form a composite. The composite material doped with PANI, NiO NPs and GO ultimately demonstrates superior discharge capability compared to the pristine alloy, establishing it as the most high-performing among all samples. The sample doped with both PANI or NiO NPs and GO exhibited superior discharge capacity and HRD performance compared to the sample containing only GO. The Co 0.9 Cu 0.1 Si + PANI/NiO NPs/GO electrode not only demonstrates a remarkable maximum discharge capacity of 590.82 mAh/g, but it also boasts an impressive highest exchange current density of 180.5 mA/g, alongside a notable cycle stability of 61.1 %. The enhancement of electrochemical activity and kinetic performance in alloys is attributed to the synergistic effect exerted by PANI, NiO NPs and GO. GO itself has a high specific surface area and good conductivity, which is conducive to the transfer of hydrogen inside the alloy and enhance the hydrogen storage performance of the alloy. Polyaniline participate in the reversible redox reaction and remain stable during the charge/discharge cycle, which promoted the surface anodizing process of the alloy. The NiO NPs catalyst can effectively weaken the O H bond, facilitating the dissociation of adsorbed water. These factors work together to significantly improve the overall electrochemical hydrogen storage performance of the alloy.
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