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Sajid A, Amjad M, Manzoor Q, Wazir S, Sajid A, Alwadai N, Iqbal M, Tamam N. Synthesis of bimetallic oxides (SrO-CoO) nanoparticles decorated polyacrylamide hydrogels for controlled drug release and wound healing applications. Int J Biol Macromol 2024; 274:133194. [PMID: 38885867 DOI: 10.1016/j.ijbiomac.2024.133194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/20/2024]
Abstract
Hydrogels are polymeric structures characterized by their three-dimensional nature, insolubility in aqueous media, and remarkable ability to absorb significant amounts of water. Owing to their exceptional biocompatibility with living tissues, hydrogels find extensive use in various biomedical applications. Guggul gum grafted polyacrylamide hydrogels (SG) were prepared and green synthesized SrO, CoO and SrO-CoO nanoparticles (NPs) were incorporated with hydrogels (SrG, CoG, Sr-CoG) respectively. The fabricated hydrogels were characterized by various analytical techniques such as FTIR, XRD and SEM. XRD results confirmed the presence of Sr and Co metal nanoparticles in the fabricated hydrogels matrix, SrG pattern showed diffraction peaks at 2θ = 30°, 36.59°, 44.11°, 50.22° and 62.20° while CoG peaks appeared at 2θ = 36.59°, 42.32°, 61.18°, 74.05° and 77.08°. SG, SrG, CoG and Sr-CoG hydrogels showed 11%, 32%, 23% and 45% radical scavenging activity respectively as compared to standard BHT (Butylated hydroxyl toluene). In vitro drug release tests results showed that SG, SrG, CoG and Sr-CoG exhibited 21%, 16%, 13% and 10% sustained release of naproxen respectively. The results revealed that SrO and CoO nanoparticles dopped hydrogels possessed good wound healing potential as compared to conventional hydrogels, which provides great potential in clinical treatment for wounds.
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Affiliation(s)
- Arfaa Sajid
- Department of Chemistry, The University of Lahore, 54590 Lahore, Pakistan.
| | - Muniba Amjad
- Department of Chemistry, The University of Lahore, 54590 Lahore, Pakistan
| | - Qaisar Manzoor
- Department of Chemistry, The University of Lahore, 54590 Lahore, Pakistan.
| | - Saba Wazir
- Department of Chemistry, The University of Lahore, 54590 Lahore, Pakistan
| | - Anam Sajid
- Department of natural sciences and humanities, University of engineering and technology Lahore New Campus, Kala Sha Kaku, Pakistan.
| | - Norah Alwadai
- Department of Physics, College of Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
| | - Munawar Iqbal
- School of Chemistry, University of the Punjab, Lahore 54590, Pakistan
| | - Nissren Tamam
- Department of Physics, College of Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
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2
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Abuduhelili A, Chen R, Sun J, Bu Y, Yin D, Li G, Meng X, Zeng J. Oxygen Vacancy-Enriched CoFe 2O 4 for Electrochemically Sensitive Detection of the Breast Cancer CD44 Biomarker. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:14583-14593. [PMID: 38967629 DOI: 10.1021/acs.langmuir.4c01496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Enhancing the selectivity of detection methods is essential to distinguish breast cancer biomarker cluster of differentiation 44 (CD44) from other species and reduce false-positive or false-negative results. Here, oxygen vacancy-enriched CoFe2O4 (CoFe2O4-x) was crafted, and its implementation as an electrochemical electrode for the detection of CD44 biomarkers has been scrutinized. This unique electrode material offers significant benefits and novel features that enhance the sensitivity and selectivity of the detection process. The oxygen vacancy density of CoFe2O4-x was tuned by adjusting the mass ratios of iron to cobalt precursors (iron-cobalt ratio) and changing annealing atmospheres. Electrochemical characterization reveals that, when the iron-cobalt ratio is 1:0.54 and the annealing atmosphere is nitrogen, the as-synthesized CoFe2O4-x electrode manifests the best electrochemical activity. The CoFe2O4-x electrode demonstrates high sensitivity (28.22 μA (ng mL)-1 cm-2), low detection limit (0.033 pg mL-1), and robust stability (for 11 days). Oxygen vacancies can not only enhance the conductivities of CoFe2O4 but also provide better adsorption of -NH2, which is beneficial for stability and electrochemical detection performance. The electrochemical detection signal can be amplified using CoFe2O4-x as a signal probe. Additionally, it is promising to know that the CoFe2O4-x electrode has shown good accuracy in real biological samples, including melanoma cell dilutions and breast cancer patient sera. The electrochemical detection results are comparable to ELISA results, which indicates that the CoFe2O4-x electrode can detect CD44 in complex biological samples. The utilization of CoFe2O4-x as the signal probe may expand the application of CoFe2O4-x in biosensing fields.
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Affiliation(s)
- Abudulitifujiang Abuduhelili
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
| | - Rongling Chen
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
| | - Jian Sun
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
| | - Yingchun Bu
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
| | - Dongfeng Yin
- Department of Pharmacy, General Hospital of Xinjiang Military Command, PLA, Urumqi, Xinjiang 830001, PR China
| | - Gairu Li
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
| | - Xiangtong Meng
- State Key Laboratory of Organic-Inorganic Composites, State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jinfeng Zeng
- Xinjiang Key Laboratory of Natural Medicines Active Components and Drug Release Technology, College of Pharmacy, Xinjiang Medical University, No.567 Shangde North Road, Urumqi, Xinjiang 830001, PR China
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3
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Ghodke NP, Bhoraskar SV, Mathe VL. Phase tuning of a thermal plasma synthesized cobalt oxide catalyst and understanding of its surface modification during the hydrolysis of NaBH 4. Dalton Trans 2024; 53:11038-11049. [PMID: 38884578 DOI: 10.1039/d4dt00929k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
NaBH4 is an attractive candidate for closed-loop hydrogen generation in small practical applications owing to its ambient condition hydrogen release mechanism, non-toxic byproduct, ability to regenerate, and stability at ambient conditions. The hydrolysis of NaBH4 requires a catalyst to accelerate the hydrogen generation process and cobalt oxide is one such promising catalyst in this reaction. The surface species and crystalline phases of cobalt oxide catalysts play an important role in determining the hydrogen generation rate and overall hydrolysis process. In this study, cobalt oxide nanoparticles are synthesized by a thermal plasma route. The two crystalline phases, namely c-CoO and Co3O4, are tuned using thermal plasma operating conditions. The catalysts so obtained have been thoroughly characterized using analytical techniques like XRD, XPS, HR-TEM, etc. Furthermore, the catalyst was used for hydrogen production in the hydrolysis process of NaBH4. The ex situ X-ray photoelectron spectra recorded at different stages of the hydrolysis process have been extensively used to understand surface modifications occurring at the surface of the catalyst. The Co+3/Co+2 ratio and attachment of other species during hydrolysis analyzed using XPS are correlated with the overall hydrolysis reaction before and after catalysis. It was concluded that the presence of the c-CoO (i.e. initial Co+2 species presence) phase brings stability to hydrogen production in that cycle.
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Affiliation(s)
- N P Ghodke
- Department of Physics, Savitribai Phule Pune University, Ganeshkhind Rd, Pune411007, India.
| | - S V Bhoraskar
- Department of Physics, Savitribai Phule Pune University, Ganeshkhind Rd, Pune411007, India.
| | - V L Mathe
- Department of Physics, Savitribai Phule Pune University, Ganeshkhind Rd, Pune411007, India.
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4
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Ma R, Gao J, Zhang L, Wang N, Hu Y, Bartling S, Lund H, Wohlrab S, Jagadeesh RV, Beller M. Cobalt nanoparticle-catalysed N-alkylation of amides with alcohols. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2024; 26:1471-1477. [PMID: 38323305 PMCID: PMC10840649 DOI: 10.1039/d3gc03286h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/28/2023] [Indexed: 02/08/2024]
Abstract
A protocol for efficient N-alkylation of benzamides with alcohols in the presence of cobalt-nanocatalysts is described. Key to the success of this general methodology is the use of highly dispersed cobalt nanoparticles supported on carbon, which are obtained from the pyrolysis of cobalt(ii) acetate and o-phenylenediamine as a ligand at suitable temperatures. The catalytic material shows a broad substrate scope and good tolerance to functional groups. Apart from the synthesis of a variety of secondary amides (>45 products), the catalyst allows for the conversion of more challenging aliphatic alcohols and amides, including biobased and macromolecular amides. The practical applicability of the catalyst is underlined by the successful recycling and reusability.
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Affiliation(s)
- Rui Ma
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Jie Gao
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Lan Zhang
- Faculty of Environment and Life, Beijing University of Technology 100124 Beijing China
| | - Ning Wang
- Faculty of Environment and Life, Beijing University of Technology 100124 Beijing China
| | - Yue Hu
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Stephan Bartling
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Henrik Lund
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Sebastian Wohlrab
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Rajenahally V Jagadeesh
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
- Nanotechnology Centre, Centre for Energy and Environmental Technologies, VŠB-Technical University of Ostrava Ostrava-Poruba Czech Republic
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
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5
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Kim D, Lee CB, Park KK, Bang H, Truong PL, Lee J, Jeong BH, Kim H, Won SM, Kim DH, Lee D, Ko JH, Baac HW, Kim K, Park HJ. Highly Reliable 3D Channel Memory and Its Application in a Neuromorphic Sensory System for Hand Gesture Recognition. ACS NANO 2023; 17:24826-24840. [PMID: 38060577 DOI: 10.1021/acsnano.3c05493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Brain-inspired neuromorphic computing systems, based on a crossbar array of two-terminal multilevel resistive random-access memory (RRAM), have attracted attention as promising technologies for processing large amounts of unstructured data. However, the low reliability and inferior conductance tunability of RRAM, caused by uncontrollable metal filament formation in the uneven switching medium, result in lower accuracy compared to the software neural network (SW-NN). In this work, we present a highly reliable CoOx-based multilevel RRAM with an optimized crystal size and density in the switching medium, providing a three-dimensional (3D) grain boundary (GB) network. This design enhances the reliability of the RRAM by improving the cycle-to-cycle endurance and device-to-device stability of the I-V characteristics with minimal variation. Furthermore, the designed 3D GB-channel RRAM (3D GB-RRAM) exhibits excellent conductance tunability, demonstrating high symmetricity (624), low nonlinearity (βLTP/βLTD ∼ 0.20/0.39), and a large dynamic range (Gmax/Gmin ∼ 31.1). The cyclic stability of long-term potentiation and depression also exceeds 100 cycles (105 voltage pulses), and the relative standard deviation of Gmax/Gmin is only 2.9%. Leveraging these superior reliability and performance attributes, we propose a neuromorphic sensory system for finger motion tracking and hand gesture recognition as a potential elemental technology for the metaverse. This system consists of a stretchable double-layered photoacoustic strain sensor and a crossbar array neural network. We perform training and recognition tasks on ultrasonic patterns associated with finger motion and hand gestures, attaining a recognition accuracy of 97.9% and 97.4%, comparable to that of SW-NN (99.8% and 98.7%).
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Affiliation(s)
- Dohyung Kim
- Department of Organic and Nano Engineering & Human-Tech Convergence Program, Hanyang University, Seoul 04763, Korea
| | - Cheong Beom Lee
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Kyu Kwan Park
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Hyeonsu Bang
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Phuoc Loc Truong
- Department of Mechanical Engineering, Gachon University, Gyeonggi 13120, Korea
| | - Jongmin Lee
- Department of Organic and Nano Engineering & Human-Tech Convergence Program, Hanyang University, Seoul 04763, Korea
| | - Bum Ho Jeong
- Department of Organic and Nano Engineering & Human-Tech Convergence Program, Hanyang University, Seoul 04763, Korea
| | - Hakjun Kim
- Department of Organic and Nano Engineering & Human-Tech Convergence Program, Hanyang University, Seoul 04763, Korea
| | - Sang Min Won
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Do Hwan Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Daeho Lee
- Department of Mechanical Engineering, Gachon University, Gyeonggi 13120, Korea
| | - Jong Hwan Ko
- College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Hyoung Won Baac
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Kyeounghak Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Hui Joon Park
- Department of Organic and Nano Engineering & Human-Tech Convergence Program, Hanyang University, Seoul 04763, Korea
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6
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Weng Z, Liu L, Hu Y, Wei Y, Da P, Wu Z, Mu Z, Xi P, Yan CH. Significance of Engineering the MnO 6 Octahedral Units to Promote the Oxygen Reduction Reaction of Perovskite Oxides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2311102. [PMID: 38100677 DOI: 10.1002/adma.202311102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 11/15/2023] [Indexed: 12/17/2023]
Abstract
The electronic structure and geometric configuration of catalysts play a crucial role to design novel perovskite-type catalysts for oxygen reduction reaction (ORR). Nowadays, many studies are more concerned with the influence of electronic structure and ignore the geometric effect, which plays a nonnegligible role in enhancing catalytic performances. Herein, this work regulates the MnO6 octahedral tilting degree of LaMnO3 by modulating the concentration of Y3+ , excluding the electronic effect from the valence state of manganese. Plotting the MnO6 octahedral tilting degree as a function of concentration of Y3+ produces a volcano-shaped plot. The octahedral tilting can reduce the Mn-O covalency, generating more highly active Mn3+ and oxygen vacancies during ORR process. The specific activity has a positive correlation with octahedral tilting degree. Meanwhile, the octahedral tilting stabilizes Mn-O interactions during ORR process and promote stability. Based on experimental results and DFT calculations, octahedral tilting alters the rate-determining step (RDS) and decrease the energy barrier. Subsequent extended experiment confirms that octahedral tilting is the key factor to affect the catalytic performances.
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Affiliation(s)
- Zheng Weng
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Luohua Liu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Yang Hu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Yicheng Wei
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Pengfei Da
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Zelong Wu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Zhaori Mu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Pinxian Xi
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
- State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou, 014030, China
| | - Chun-Hua Yan
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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7
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Dimitriou C, Psathas P, Solakidou M, Deligiannakis Y. Advanced Flame Spray Pyrolysis (FSP) Technologies for Engineering Multifunctional Nanostructures and Nanodevices. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3006. [PMID: 38063702 PMCID: PMC10707979 DOI: 10.3390/nano13233006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 09/06/2024]
Abstract
Flame spray pyrolysis (FSP) is an industrially scalable technology that enables the engineering of a wide range of metal-based nanomaterials with tailored properties nanoparticles. In the present review, we discuss the recent state-of-the-art advances in FSP technology with regard to nanostructure engineering as well as the FSP reactor setup designs. The challenges of in situ incorporation of nanoparticles into complex functional arrays are reviewed, underscoring FSP's transformative potential in next-generation nanodevice fabrication. Key areas of focus include the integration of FSP into the technology readiness level (TRL) for nanomaterials production, the FSP process design, and recent advancements in nanodevice development. With a comprehensive overview of engineering methodologies such as the oxygen-deficient process, double-nozzle configuration, and in situ coatings deposition, this review charts the trajectory of FSP from its foundational roots to its contemporary applications in intricate nanostructure and nanodevice synthesis.
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Affiliation(s)
| | | | | | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
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8
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Li M, Yang Q, Fan L, Dai X, Kang Z, Wang R, Sun D. An Ultrastable Bifunctional Electrocatalyst Derived from a Co 2+-Anchored Covalent-Organic Framework for High-Efficiency ORR/OER and Rechargeable Zinc-Air Battery. ACS APPLIED MATERIALS & INTERFACES 2023; 15:39448-39460. [PMID: 37527438 DOI: 10.1021/acsami.3c09114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
It remains a great challenge to develop alternative electrocatalysts with high stability for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, a bifunctional electrocatalyst composed of hollow CoOx (Co3O4/CoO) nanoparticles embedded in lamellar carbon nanofibers is derived from a Co2+-anchored covalent-organic framework. The as-fabricated electrocatalyst (CoOx@NC-800) exhibits a half-wave potential (E1/2) of 0.89 V with ultrahigh long-term stability (100% current retention after 3000 CV cycles). Together with promising OER performance, the CoOx@NC-800 based reversible Zn-air battery displays a small potential gap (0.70 V), superior to that of the commercial 20% Pt/C + RuO2. The density functional theory (DFT) calculations reveal that the remarkable electrocatalytic performance and stability of CoOx@NC-800 are attributed to the optimized adsorption of the *OOH intermediate and reduced free energy of the potential-limiting step. This study establishes the functionalization of COF structure for fabrication of high-performance carbon-based electrocatalysts.
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Affiliation(s)
- Mengfei Li
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - QianQian Yang
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Lili Fan
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Xiaojie Dai
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Zixi Kang
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Rongming Wang
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Daofeng Sun
- School of Materials Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China
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9
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Zindrou A, Deligiannakis Y. Quantitative In Situ Monitoring of Cu-Atom Release by Cu 2O Nanocatalysts under Photocatalytic CO 2 Reduction Conditions: New Insights into the Photocorrosion Mechanism. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111773. [PMID: 37299676 DOI: 10.3390/nano13111773] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/18/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Cu2O is among the most promising photocatalysts for CO2 reduction, however its photocorrosion remains a standalone challenge. Herein, we present an in situ study of the release of Cu ions from Cu2O nanocatalysts under photocatalytic conditions in the presence of HCO3 as a catalytic substrate in H2O. The Cu-oxide nanomaterials were produced by Flame Spray Pyrolysis (FSP) technology. Using Electron Paramagnetic Resonance (EPR) spectroscopy in tandem with analytical Anodic Stripping Voltammetry (ASV), we monitored in situ the Cu2+ atom release from the Cu2O nanoparticles in comparison with CuO nanoparticles under photocatalytic conditions. Our quantitative, kinetic data show that light has detrimental effect on the photocorrosion of Cu2O and ensuing Cu2+ ion release in the H2O solution, up to 15.7% of its mass. EPR reveals that HCO3 acts as a ligand of the Cu2+ ions, promoting the liberation of {HCO3-Cu} complexes in solution from Cu2O, up to 27% of its mass. HCO3 alone exerted a marginal effect. XRD data show that under prolonged irradiation, part of Cu2+ ions can reprecipitate on the Cu2O surface, creating a passivating CuO layer that stabilizes the Cu2O from further photocorrosion. Including isopropanol as a hole scavenger has a drastic effect on the photocorrosion of Cu2O nanoparticles and suppresses the release of Cu2+ ions to the solution. Methodwise, the present data exemplify that EPR and ASV can be useful tools to help quantitatively understand the solid-solution interface photocorrosion phenomena for Cu2O.
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Affiliation(s)
- Areti Zindrou
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
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10
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Bhardwaj S, Srivastava R, Mageto T, Chaudhari M, Kumar A, Sultana J, Mishra SR, Perez F, Gupta RK. Bimetallic Co-Fe sulfide and phosphide as efficient electrode materials for overall water splitting and supercapacitor. DISCOVER NANO 2023; 18:59. [PMID: 37382728 PMCID: PMC10409961 DOI: 10.1186/s11671-023-03837-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/22/2023] [Indexed: 06/30/2023]
Abstract
The major center of attraction in renewable energy technology is the designing of an efficient material for both electrocatalytic and supercapacitor (SC) applications. Herein, we report the simple hydrothermal method to synthesize cobalt-iron-based nanocomposites followed by sulfurization and phosphorization. The crystallinity of nanocomposites has been confirmed using X-ray diffraction, where crystalline nature improves from as-prepared to sulfurized to phosphorized. The as-synthesized CoFe-nanocomposite requires 263 mV overpotential for oxygen evolution reaction (OER) to reach a current density of 10 mA/cm2 whereas the phosphorized requires 240 mV to reach 10 mA/cm2. The hydrogen evolution reaction (HER) for CoFe-nanocomposite exhibits 208 mV overpotential at 10 mA/cm2. Moreover, the results improved after phosphorization showing 186 mV to reach 10 mA/cm2. The specific capacitance (Csp) of as-synthesized nanocomposite is 120 F/g at 1 A/g, along with a power density of 3752 W/kg and a maximum energy density of 4.3 Wh/kg. Furthermore, the phosphorized nanocomposite shows the best performance by exhibiting 252 F/g at 1 A/g and the highest power and energy density of 4.2 kW/kg and 10.1 Wh/kg. This shows that the results get improved more than twice. The 97% capacitance retention after 5000 cycles shows cyclic stability of phosphorized CoFe. Our research thus offers cost-effective and highly efficient material for energy production and storage applications.
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Affiliation(s)
- Shiva Bhardwaj
- Department of Physics, Pittsburg State University, Pittsburg, KS, 66762, USA
- National Institute of Material Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA
| | - Rishabh Srivastava
- Department of Physics, Pittsburg State University, Pittsburg, KS, 66762, USA
- National Institute of Material Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA
| | - Teddy Mageto
- Department of Physics, Pittsburg State University, Pittsburg, KS, 66762, USA
- National Institute of Material Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA
| | - Mahesh Chaudhari
- National Institute of Material Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA
- Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA
| | - Anuj Kumar
- Nano-Technology Research Laboratory, Department of Chemistry, GLA University, Mathura, Uttar Pradesh, 281406, India.
| | - Jolaikha Sultana
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN, 38152, USA
| | - Sanjay R Mishra
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN, 38152, USA
| | - Felio Perez
- Integrated Microscopy Center, The University of Memphis, Memphis, TN, 38152, USA
| | - Ram K Gupta
- National Institute of Material Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA.
- Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA.
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Incorporation of Nanocatalysts for the Production of Bio-Oil from Staphylea holocarpa Wood. Polymers (Basel) 2022; 14:polym14204385. [PMID: 36297963 PMCID: PMC9609867 DOI: 10.3390/polym14204385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 11/30/2022] Open
Abstract
Biomass has been recognized as the most common source of renewable energy. In recent years, researchers have paved the way for a search for suitable biomass resources to replace traditional fossil fuel energy and provide high energy output. Although there are plenty of studies of biomass as good biomaterials, there is little detailed information about Staphylea holocarpa wood (S. holocarpa) as a potential bio-oil material. The purpose of this study is to explore the potential of S. holocarpa wood as a bio-oil. Nanocatalyst cobalt (II) oxide (Co3O4) and Nickel (II) oxide (NiO) were used to improve the production of bio-oil from S. holocarpa wood. The preparation of biofuels and the extraction of bioactive drugs were performed by the rapid gasification of nanocatalysts. The result indicated that the abundant chemical components detected in the S. holocarpa wood extract could be used in biomedicine, cosmetics, and biofuels, and have a broad industrial application prospect. In addition, nanocatalyst cobalt tetraoxide (Co3O4) could improve the catalytic cracking of S. holocarpa wood and generate more bioactive molecules at high temperature, which is conducive to the utilization and development of S. holocarpa wood as biomass. This is the first time that S. holocarpa wood was used in combination with nanocatalysts. In the future, nanocatalysts can be used to solve the problem of sustainable development of biological resources.
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Photocatalytic Dye Degradation and Bio-Insights of Honey-Produced α-Fe2O3 Nanoparticles. WATER 2022. [DOI: 10.3390/w14152301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Iron oxide nanoparticles are produced using simple auto combustion methods with honey as a metal-stabilizing and -reducing agent. Herein, α-Fe2O3 nanoparticles are produced using an iron nitrate precursor. These prepared samples are analyzed by an X-ray diffractometer (XRD), FTIR spectroscopy, UV-DRS, and a field-emission scanning electron microscope (FESEM) combined with energy-dispersive spectroscopy and a vibrating sample magnetometer (VSM). The XRD results confirm a rhombohedral structure with an R3c¯ space group single-phase formation of α-Fe2O3 in all samples. FESEM images reveal the different morphologies for the entire three samples. TEM analysis exhibits spherical shapes and their distribution on the surfaces. XPS spectroscopy confirms the Fe-2p and O-1s state and their valency. The VSM study shows strong ferromagnetic behavior. The prepared α-Fe2O3 nanoparticles exhibit exceptional charge carriers and radical production. The prepared sample retains excellent photocatalytic, antifungal and antibacterial activity.
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Liu L, Han Z, Lv Y, Xin C, Zhou X, Yu L, Tai X. MIL-100(Fe) Supported Pt-Co Nanoparticles as Active and Selective Heterogeneous Catalysts for Hydrogenation of 1,3-Butadiene. ChemistryOpen 2022; 11:e202100288. [PMID: 35191614 PMCID: PMC8889502 DOI: 10.1002/open.202100288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/30/2022] [Indexed: 11/23/2022] Open
Abstract
Superior catalytic performance for selective 1,3-butadiene (1,3-BD) hydrogenation can usually be achieved with supported bimetallic catalysts. In this work, Pt-Co nanoparticles and Pt nanoparticles supported on metal-organic framework MIL-100(Fe) catalysts (MIL=Materials of Institut Lavoisier, PtCo/MIL-100(Fe) and Pt/MIL-100(Fe)) were synthesized via a simple impregnation reduction method, and their catalytic performance was investigated for the hydrogenation of 1,3-BD. Pt1Co1/MIL-100(Fe) presented better catalytic performance than Pt/MIL-100(Fe), with significantly enhanced total butene selectivity. Moreover, the secondary hydrogenation of butenes was effectively inhibited after doping with Co. The Pt1Co1/MIL-100(Fe) catalyst displayed good stability in the 1,3-BD hydrogenation reaction. No significant catalyst deactivation was observed during 9 h of hydrogenation, but its catalytic activity gradually reduces for the next 17 h. Carbon deposition on Pt1Co1/MIL-100(Fe) is the reason for its deactivation in 1,3-BD hydrogenation reaction. The spent Pt1Co1/MIL-100(Fe) catalyst could be regenerated at 200 °C, and regenerated catalysts displayed the similar 1,3-BD conversion and butene selectivity with fresh catalysts. Moreover, the rate-determining step of this reaction was hydrogen dissociation. The outstanding activity and total butene selectivity of the Pt1Co1/MIL-100(Fe) catalyst illustrate that Pt-Co bimetallic catalysts are an ideal alternative for replacing mono-noble-metal-based catalysts in selective 1,3-BD hydrogenation reactions.
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Affiliation(s)
- Lili Liu
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Zhixuan Han
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Yifan Lv
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Chunling Xin
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Xiaojing Zhou
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Lei Yu
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
| | - Xishi Tai
- School of Chemistry & Chemical Engineering and Environmental EngineeringWeifang UniversityWeifang261061, ShandongP.R. China
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