CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Girma Sisay Wolde,Dong-Hau Kuo,Merga Hailemariam Urgesa,Tadele Negash Gemeda
Simultaneous oxidation of benzyl alcohol (BA) and reduction of p-dinitrobenzene (p-DNB) over Gd-doped TiO 2 nanorods decorated with poly(o-phenylenediamine, PoPD) nanowires was reported in this work. The doping of TiO 2 with Gd induced surface defects, i.e., oxygen vacancy (OV) and the Ti 3+ –on-Ti 4+ site, while incorporating PoPD highly enhanced the light absorption capability and electron conductivity of TiO 2 nanorods , as confirmed by UV–vis diffuse reflectance spectroscopy (DRS) and electrochemical measurements, respectively. BA was selectively oxidized by photogenerated h + to form benzaldehyde with a yield of 70.5% in water and 90.6% in acetonitrile solvent. Conversely, p-DNB was selectively reduced to p-nitroaniline (p-NA) with a yield of 89.1% in acetonitrile and to p-phenylenediamine (p-PDA) of 85.0% yield in water. This work demonstrates a vital strategy to utilize the full economic potential of photogenerated charge carriers and the decisive role of solvent for product selectivity in the course of selective organic transformations.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2020
·Vol. 24
·期 4
·1007-1015
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IF 2.646
Su Chang,Han Bing,Ma Jiaojiao,Guo Pengju,Xu Lihuan
In the present work, the poly(o-phenylenediamine)/Ag (PoPD/Ag) hybrid composite with the microrod morphology was prepared by in situ chemical oxidation method, and then composite electrodes of PoPD/Ag (PVDF) and PoPD/Ag (sodium alginate) were prepared by using PVDF and sodium alginate as electrode binders, respectively. As explored as the anode of lithium ion batteries, the redox-active PoPD in the hybrid composite, compared to the pure PoPD, demonstrated the remarkably improved electrochemical performances with superior high capacity and good rate capability and cycling stability, due to the improved intrinsic electrical conductivity of PoPD via the introduced Ag nanoparticles in the polymer. As the sodium alginate was chosen as the functional electrode binder, PoPD/Ag (sodium alginate) exhibited the initial charge/discharge-specific capacity of 1452.9/2317.7 mAh g −1 , and after the 100th cycles, the developed discharge capacity for PoPD/Ag (sodium alginate) reached to 1389.9 mAh g −1 , which was evidently higher than that of PoPD. Its stable and representative discharge-specific capacities were 1291, 1044.9, 856.7, 762.5 mAh g −1 at the current rate of 50, 100, 200, and 500 mAh g −1 , respectively, which were obviously superior to that of PoPD and PoPD/Ag (PVDF), indicating that sodium alginate as binder has the special effects on the electrochemical characteristics of PoPD, which benefited to the capacity release step by step during the charge/discharge process. The works would provide significant exploration for the preparation of high-performance poly (aromatic amine) polymer as the electrode materials.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 2
·239
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IF 3.9
Mohammed Jalalah,Zubair Nabi,Muhammad Naveed Anjum,Mirza Nadeem Ahmad,Atta Ul Haq,Muhammad Bilal Qadir,Mohd Faisal,Mabkhoot Alsaiari,Muhammad Irfan,Farid A. Harraz
Growing industry and its effluents create a serious environmental concern. Various industrial wastes such as toxic dyes and volatile organic compounds are posing a threat to a clean environment because of their non-biodegradable nature and high chemical stability. In recent years, the degradation of toxic dyes and drugs by photo-catalysts has gained much importance and proved a successful approach to capture light by hybrid photo-catalysts for decomposing toxic organic molecules. This work presents the synthesis of a poly(o-anisidine)-based composite with graphitic carbon nitride and zinc oxide (POA/g-C3N4/ZnO) and its utilization as a photo-catalyst. Various analytical techniques investigated the synthesized photo-catalysts’ chemical structure, crystallinity, and morphology. The degradation of Congo red dye evaluated the efficiency of the photo-catalyst in an aqueous medium under ultraviolet light. It was revealed that the photo-catalytic activity of the synthesized POA/g-C3N4/ZnO composites show 81.43%, 92.28%, and 87.05% degradation. This sustainable composite will be highly beneficial to treat industrial wastewater to make our environment clean.Keywords:poly(o-anisidine);graphitic carbon nitride;zinc oxide;ternary composite;photo-catalytic degradation;Congo red;industrial wastewater treatment
研究领域:
环境科学
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材料科学
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DOI
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Yating Kan,Chenhua Han,Ying Ye,Xiao Zhang,Yuanfeng Huang,Liang Xing,Yifan Zhou,Huawei Qin
An all-solid-state ammonium ion-selective electrode, with silver/nano-silver wire as the substrate, polyaniline as transducer and poly (o-phenylenediamine) as sensitive membrane, is presented. The nano-silver was prepared by electrodeposition in 0.1 M AgNO 3 standard solution with the half-sine wave at amplitude of 500 mV, frequency of 50 HZ and action time of 1 min. The polyaniline and poly (o-phenylenediamine) were electropolymerized on the surface of the silver/nano-silver substrate by cyclic voltammetry with the scanning potential from 0 to 0.45 V in solutions of 1.0 M aniline hydrochloride and 0.08 M o-phenylenediamine hydrochloride, respectively. Under the SEM, poly (o-phenylenediamine) with 0.5-5 μm in size was evenly and firmly embedded on the surface of the PANI. This ammonium electrode exhibited low impedance of approximately 70 Ohm. It can detect as low as 1.2×10 -5 M of ammonium ion, with the slopes of 54.99-55.70 mV per decade (R 2 >0.99) within a linear range between 2×10 -5 M to 0.1 M. It responds as quickly as 0.5-2 s, as well as its lifespan extends to at least 147 days. The electrode showed a superior selectivity toward NH 4 + , and was successfully applied to detect the NH 4 + concentration in real samples. In addition, this electrode is miniature and convenient for package and assembly, which will enable in-situ measurement and long-term monitoring of NH 4 + concentration in rivers, lakes and industrial sewage.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Ting Liu,Bolu Sun,Chunyan Sang,Hua Cai,Hong Liu,Yuwei Liu,Gengsheng He
In the current work, a modified glassy carbon electrode (GCE) with excellent conductivity was prepared by drop-coating carboxymethyl cellulose (CMC) and multiwalled carbon nanotubes (MWCNTs) on the GCE surface. On this basis, two highly selective molecularly imprinted sensors (MIP@PFDA/modified GCE and MIP@PFOS/modified GCE) were separately obtained by in situ electropolymerization of o-phenylenediamine (o-PD) with perfluorodecanoic acid (PFDA) and perfluorooctanesulfonic acid (PFOS) as templates. Under optimal conditions, sensitive quantification methods in the linearity ranges 0.1–1000 ng/mL (PFDA) and 0.05–900 ng/mL (PFOS) were developed via differential pulse voltammetry using [Fe(CN)6]3–/4– as a redox probe. The detection limit values of PFDA and PFOS were as low as 0.041 and 0.015 ng/mL, respectively. Both sensors also presented great stability and selectivity in coexistence with other interferences. Lastly, three food samples were utilized to verify the validity and applicability with recoveries of 89.97%–112.27%, confirming its potential for per- and polyfluoroalkyl substances (PFASs) monitoring in a complex matrix.
研究领域:
分析化学
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环境科学
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食品安全
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2021
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IF 6.901
Huihui Zhang,Lushi Tan,Zhejuan Zhang,Guirong Zhang,Jiaxing Lu
In this work, different mass percentage of activated carbon (YBC) doped carbon paste electrodes (YBCPE) were firstly prepared, then electrodeposition of Pt nanoparticles was performed at a constant potential -0.1 V vs. Ag|AgCl|KCl (3 M) to prepare working electrodes Pt/YBCPE. It was shown that Pt/YBCPE(16%) exhibits the highest mass activity for formaldehyde oxidation compared to platinum deposited on pure carbon paste electrode (CPE) and other YBCPE(X%) electrodes. Afterwards, poly-o-anisidine (POA) film was prepared by electro-polymerization onto the CPE and YBCPE(16%) in o-anisidine monomer solution at 0.7 V and then Pt nanoparticles were electro-deposited at the POA film surface for fabrication of the Pt/POA/CPE and Pt/POA/YBCPE composite electrodes. The morphology of the composite electrodes was characterized by SEM, TEM, XRD and XPS which revealed that the presence of YBC and POA in the composite electrodes significantly improves the dispersion of Pt nanoparticles on the electrodes. Electrochemical impedance spectroscopy (EIS), chronoamperometry and cyclic voltammetry were used to verify the conductivity and durability of the composite electrode and its electro-catalytic activity. The obtained results indicated that the Pt/POA(16mC)/YBCPE(16%) exhibits excellent electro-catalytic activity towards the formaldehyde oxidation owing to the synergistic effect of the support-catalyst. Some comparisons for the electrooxidation of formaldehyde and the electrooxidation of methanol and formic acid on the composite electrodes also were conducted.
研究领域:
材料科学
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电化学
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环境科学
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DOI
高影响因子
POLYMER
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2021
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IF 4.43
Hongyu Zhu,Yu Liu,Dongxu Gu,Zikun Rao,Yang Li,Jianyuan Hao
It is a challenging work to design novel responsive materials by controlling the secondary structure of polypeptide , especially β-sheet. We designed and synthesized a novel dual responsive diblock copolymer of methyl poly (ethylene glycol)- b -poly (O-benzyl- l -threonine) (mPEG- b -PBnLT). The copolymer solutions exhibited unusual and reversible gel-to-sol-to-gel transition behavior with temperature, and the transition temperature window could be easily adjusted by changing copolymer concentration or PBnLT block length . It was confirmed that low temperature gel-to-sol transition was due to the disassembly of the preliminary β-sheet layered nano-assemblies that induced the transformation of self-organized morphology from nanosized fibrils to spherical aggregates, while the high temperature sol-to-gel transition was ascribed to the dehydration of PEG segments. The disassembly of β-sheet structures was caused by the change in the polarity of the pendant benzyl ether bond of PBnLT block in water with temperature. This stimuli-responsiveness of secondary self-assembled nanostructures and the corresponding change in macroscopic phase transition inspires a brand-new strategy for structural design and functional control of polypeptide materials.
研究领域:
高分子科学
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材料化学
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纳米技术
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智能材料
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生物聚合物
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DOI
高影响因子
POLYMERS & POLYMER COMPOSITES
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2020
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IF 1.023
Yawen Fang,Yanbin Wang,Yongchao Li,Huang Yu,Changlong Zhuang,Zhonglin Luo,Zicheng Fan,Biaobing Wang
A series of novel ternary conductive composites have been prepared by incorporating functionalized multiwalled carbon nanotubes (FMWCNTs) into the binary composites of poly(amide-imide) (PAI) and poly(o-methoxyaniline) (POMA) to further improve the conductivity of PAI composites. With increasing the weight ratio of FMWCNTs, the conductivity of PAI/POMA/FMWCNTs ternary composites has been significantly enhanced from 10−3 S m−1 to 90 S m−1, much higher than that of the sum of PAI/POMA and PAI/FMWCNTs binary composites. The enhanced conductivity is mainly ascribed from a much more intensive conductive network formed in the PAI/POMA/FMWCNTs ternary composites. It is found that the N–H bending of amide group in the Fourier transform infrared spectrometry spectra is observed at 3298 cm−1 for PAI, 3296 cm−1 for PAI/POMA binary composites, and further blue shifted to 3292 cm−1 for PAI/POMA/FMWCNTs ternary composites. Moreover, the glass transition temperature has been increased from 82.5°C to 117.7°C. These results suggested that the hydrogen bonding interaction has been strengthened among PAI, POMA, and FMWCNTs, which is useful for dispersion of condcutive fillers into the polymer matrix.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
ANALYTICAL LETTERS
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2020
·
IF 1.467
Xiaohong Shi,Xuehong Ren,Ning Jing,Jialin Zhang
A sensitive and selective molecular-imprinted electrochemical sensor was developed for the determination of ampicillin. The molecularly imprinted film was electropolymerized on the surface of a glassy carbon electrode modified with gold nanoparticles (AuNPs) and single walled carbon nanotubes (SWCNTs) using ampicillin as the template molecule and o-phenylendiamine as the functional monomer. Under the optimized conditions, the current change of this electrode showed a linear relationship with the ampicillin concentration from 5.0 × 10−8 mol/L to 1.0 × 10−5 mol/L and a detection limit of 1.0 × 10−9 mol/L. Due to the increased specific surface areas and conductivity of the AuNPs and SWCNTs, this sensor exhibited excellent sensitivity for ampicillin. The recovery values for ampicillin detection in milk using the developed sensor were from 95.0% to 98.1%.
研究领域:
分析化学
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生物医学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Jie Zhou,Xianxin Qiu,Kaiqi Su,Gaixia Xu,Ping Wang
Based on the inhibition of okadaic acid (OA) on protein phosphatase 2A (PP2A), we developed disposable poly- o -aminophenol-carbon nanotubes (PoAP-CNTs) modified screen print electrode (SPE)-based electrochemical enzyme sensor for OA detection. Electropolymerized PoAP-CNTs composite film was coated on electrode for the immobilization of PP2A. Owing to the excellent physicochemical characteristic of PoAP-CNTs film, the performance of enzyme sensor was enhanced. Under the optimal conditions, the biosensor provides a larger linear range, and lower detection limit for the analysis of OA compared with colorimetric PP2A inhibition assay and PP2A/SPE. The spiked OA shellfish samples were applied to verify the efficiency of method for OA detection. The results shows acceptable recovery rate and low RSD, demonstrating the applicability of this method for in suit OA assessment in the quality and toxicity monitoring of seafood.
研究领域:
生物化学
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毒理学
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分析化学
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DOI
高影响因子
SYNTHETIC METALS
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2014
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IF 2.222
Fang Liao,Siwei Yang,Xiubing Li,Lijun Yang,Zhihui Xie,Chenshu Hu,Ling He,Xinyuan Kang,Xun Song,Tongyan Ren
Poly(o-phenylenediamine) and benzeneselenol copolymer fluorescent nanorods were synthesized via a simple hydrothermal treatment and a novel, simple and ultra-sensitive oxidation–reduction fluorescent switch system was prepared based on these copolymer fluorescent nanorods. This switch system can be triggered by redox procedure. When this copolymer is oxidized by H 2 O 2 , the switch is “off”. The switch system is “on” when glutathione (GSH) is added. This switch system has good stability, excellent selectivity and specificity. What is more, the low detective limit indicates (detection limit: 10 −12 M) this switch system can be used as an ultra-sensitive fluorescent probe for H 2 O 2 or GSH. For the mechanism of switch processes, XPS results show the change of binding mode of Se in this copolymer is the main cause.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Ziying Zhong,Yun Tang,Yanran Chen,Chunfang Wang,Faqiong Zhao,Baizhao Zeng
The widespread use of tetracycline unavoidably causes residue problems, hence its monitor in foods and environment is important. In this work, a simple but sensitive electrochemiluminescence (ECL) sensor is prepared for tetracycline detection. The sensor is constructed using TiO 2 nanoparticle, ZIF-5 loaded Ru(bpy) 3 2+ (Ru@ZIF-5), and molecularly imprinted poly-o-phenylenediamine. The TiO 2 NP acts as a co-reaction accelerator for tri-n-propylamine (TPrA) by producing electrons and holes at a certain potential to promote the production of TPrA . ZIF-5 has a large specific surface area and rich functional groups, thus can well immobilize a large amount of illuminant Ru(bpy) 3 2+ . The electrodeposited molecularly imprinted polymer acts as a recognition element. Due to the synergic effect of different components, the resulting ECL sensor shows a wide linear range of 10 nM–50 μM, high selectivity, low detection limit, and good stability. It can be used for the detection of tetracycline in food and environmental samples.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）