1
|
Yadav SP, Karmakar G, Shah AY, Vats BG, Pathak A, Tyagi A, Chauhan RS, Singh V. Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu 9S 5) and djurleite (Cu 31S 16) nanocrystals and investigation of their photo-switching characteristics. RSC Adv 2024; 14:22656-22664. [PMID: 39027037 PMCID: PMC11255559 DOI: 10.1039/d4ra04524f] [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: 06/20/2024] [Accepted: 07/04/2024] [Indexed: 07/20/2024] Open
Abstract
Copper sulfide nanostructures have evolved as one of the most technologically important materials for energy conversion and storage owing to their economic and non-toxic nature and superior performances. This paper presents a direct, scalable synthetic route aided by a single source molecular precursor (SSP) approach to access copper sulfide nanomaterials. Two SSPs, CuX(dmpymSH)(PPh3)2 (where X = Cl or I), were synthesized in quantitative yields and thermolyzed under appropriate conditions to afford the nanostructures. The analysis of the nanostructures through pXRD, EDS and XPS suggested that phase pure digenite (Cu9S5) and djurleite (Cu31S16) nanostructures were isolated from -Cl and -I substituted SSPs, respectively. The morphologies of the as-synthesized nanomaterials were investigated using electron microscopy techniques (SEM and TEM). DRS studies on pristine materials revealed blue shifted optical band gaps, which were found to be optimum for photoelectrochemical application. A prototype photoelectrochemical cell fabricated using the pristine nanostructures exhibited a stable photo-switching property, which presents these materials as suitable economic and environmentally friendly photon absorber materials.
Collapse
Affiliation(s)
- Suraj Peerappa Yadav
- Department of Chemistry, K. J. Somaiya College of Science and Commerce Vidyavihar Mumbai 400077 India
| | - Gourab Karmakar
- Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Alpa Y Shah
- Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Bal Govind Vats
- Fuel Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Ankita Pathak
- Technical Physics Division, Bhabha Atomic Research Centre Trombay Mumbai- 400085 India
| | - Adish Tyagi
- Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Rohit Singh Chauhan
- Department of Chemistry, K. J. Somaiya College of Science and Commerce Vidyavihar Mumbai 400077 India
| | - Vishal Singh
- Materials Science Division, Bhabha Atomic Research Centre Trombay Mumbai- 400085 India
| |
Collapse
|
2
|
Maged A, Mabrouk M, Nour El-Din HT, Osama L, Badr-Eldin SM, Mahmoud AA. PLGA and PDMS-based in situ forming implants loaded with rosuvastatin and copper-selenium nanoparticles: a promising dual-effect formulation with augmented antimicrobial and cytotoxic activity in breast cancer cells. Front Pharmacol 2024; 15:1397639. [PMID: 38895619 PMCID: PMC11183308 DOI: 10.3389/fphar.2024.1397639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 05/13/2024] [Indexed: 06/21/2024] Open
Abstract
Breast cancer is among the most prevalent tumors worldwide. In this study, in-situ forming implants (ISFIs) containing rosuvastatin calcium were prepared using three types of poly (D, L-lactic-co-glycolic acid) (PLGA), namely, PLGA 50/50 with ester terminal and PLGA 75/25 with ester or acid terminal. Additionally, polydimethylsiloxane (PDMS) was added in concentrations of 0, 10, 20, and 30% w/v to accelerate matrix formation. The prepared ISFIs were characterized for their rheological behaviors, rate of matrix formation, and in-vitro drug release. All the prepared formulations revealed a Newtonian flow with a matrix formation rate between 0.017 and 0.059 mm/min. Generally, increasing the concentration of PDMS increased the matrix formation rate. The prepared implants' release efficiency values ranged between 46.39 and 89.75%. The ISFI containing PLGA 50/50 with 30% PDMS was selected for further testing, as it has the highest matrix formation rate and a promising release efficiency value. Copper-selenium nanoparticles were prepared with two different particle sizes (560 and 383 nm for CS1 and CS2, respectively) and loaded into the selected formulation to enhance its anticancer activity. The unloaded and loaded implants with rosuvastatin and copper-selenium nanoparticles were evaluated for their antibacterial activity, against Gram-positive and negative microorganisms, and anticancer efficacy, against MCF-7 and MDA-MB-231 cell lines. The results confirmed the potency of rosuvastatin calcium against cancer cells and the synergistic effect when loaded with smaller particle sizes of copper-selenium nanoparticles. This formulation holds a considerable potential for efficient breast cancer therapy.
Collapse
Affiliation(s)
- Amr Maged
- Pharmaceutics and Pharmaceutical Technology Department, Faculty of Pharmacy, Future University in Egypt, New Cairo, Egypt
- Pharmaceutical Factory, Faculty of Pharmacy, Future University in Egypt, New Cairo, Egypt
| | - Mostafa Mabrouk
- Refractories, Ceramics and Building Materials Department, National Research Centre, Giza, Egypt
| | - Hanzada T. Nour El-Din
- Microbiology and Immunology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Lamyaa Osama
- Refractories, Ceramics and Building Materials Department, National Research Centre, Giza, Egypt
| | - Shaimaa M. Badr-Eldin
- Pharmaceutics Department, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Azza A. Mahmoud
- Pharmaceutics and Pharmaceutical Technology Department, Faculty of Pharmacy, Future University in Egypt, New Cairo, Egypt
| |
Collapse
|
3
|
Zhang Q, Liu S, Huang J, Fu H, Fan Q, Zong H, Guo H, Zhang A. In situ selective selenization of ZIF-derived CoSe 2 nanoparticles on NiMn-layered double hydroxide@CuBr 2 heterostructures for high performance supercapacitors. J Colloid Interface Sci 2024; 655:273-285. [PMID: 37944375 DOI: 10.1016/j.jcis.2023.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
As an emerging energy storage device, the practical application of supercapacitors (SCs) is currently constrained by their low energy density. Enhancing the capacitance of supercapacitors by leveraging the synergistic effect of multiple components in composite electrodes with well-designed structures can effectively increase their energy density. Here, a wire-sheet-particle hierarchical heterostructured CoSe2@NiMn-layered double hydroxide (NiMn-LDH) @Cu1.8Se/Copper foam (CF) electrode is synthesized via phase pseudomorphic transformation process achieved by selective selenization for Cu and Co elements. Benefiting from the stable support structure of CuBr2, the large specific surface area of NiMn-LDH, and the excellent conductivity of CoSe2, the prepared binder-free electrode shows excellent electrochemical properties. The CoSe2@NiMn-LDH@Cu1.8Se hybrid electrode exhibits a superior specific areal capacitance of 7064 mF cm-2 at 2 mA cm-2 and a stable cyclic performance with 80.11 % capacitance retention after 10,000 cycles. Furthermore, the assembled CoSe2@NiMn-LDH@Cu1.8Se/CF//AC (activated carbon) asymmetric supercapacitor (ASC) achieves an energy density of 36.6 Wh kg-1 when the power density is 760.6 W Kg-1 and retains 87.35 % of the initial capacitance after 5000 cycles. Overall, this pioneering research provided new insight for preparing supercapacitor electrode materials by selective selenization and ration design of the structures.
Collapse
Affiliation(s)
- Quan Zhang
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Shixiang Liu
- LUXI Chemical Group Co., Ltd, Liaocheng 252211, China
| | - Jianlong Huang
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Hucheng Fu
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen 361005, China
| | - Qingsheng Fan
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Hanwen Zong
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Hanwen Guo
- Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun 130022, China
| | - Aitang Zhang
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China.
| |
Collapse
|
4
|
Sun M, Liu Y, Chen D, Qian Q. Multifunctional Cu-Se Alloy Core Fibers and Micro-Nano Tapers. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:773. [PMID: 36839141 PMCID: PMC9966660 DOI: 10.3390/nano13040773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Cu-Se alloy core fibers with glass cladding were fabricated by a thermal drawing method of a reactive molten core. The composition, crystallography, and photoelectric/thermoelectric performance of the fiber cores were investigated. The X-ray diffraction spectra of the Cu-Se alloy core fibers illustrate the fiber cores being polycrystalline with CuSe and Cu3Se2 phases. Interestingly, the fiber cores show a lower electrical conductivity under laser irradiation than under darkness at room temperature. Meanwhile, the fiber cores possess a power factor of ~1.2 mWm-1K-2 at room temperature, which is approaching the value of the high thermoelectric performance bulk of Cu2Se polycrystals. The flexible Cu-Se fibers and their micro-nano tapers have potential multifunctional applications in the field of photoelectric detection and thermoelectric conversion on curved surfaces.
Collapse
|
5
|
Karmakar G, Tyagi A, Halankar KK, Nigam S, Mandal BP, Wadawale AP, Kedarnath G, Debnath AK. Molecular precursor-mediated facile synthesis of phase pure metal-rich digenite (Cu 1.8S) nanocrystals: an efficient anode for lithium-ion batteries. Dalton Trans 2023; 52:1461-1475. [PMID: 36645001 DOI: 10.1039/d2dt03757b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Copper sulfides have gained significant attention as alternative electrodes for rechargeable batteries. A simple and easily scalable synthetic pathway to access these materials is highly desirable. This paper describes the facile synthesis of metal-rich digenite Cu1.8S nanocrystals from a structurally characterized new single-source molecular precursor in various high boiling solvents of varied polarity. The as-prepared nanostructures were thoroughly characterized by PXRD, Raman spectroscopy, EDS, XPS, electron microscopy techniques and diffuse reflectance spectroscopy to understand the crystal structure, phase purity, elemental composition, morphology and band gap. It was found that the reaction solvent has a profound role on their crystallite size, morphology and band gap, however the crystal structure and phase purity remained unaffected. Pristine Cu1.8S nanostructures have been employed as an anode material in lithium-ion batteries (LIBs). The cell delivers a high initial charge capacity of ∼462 mA h g-1 and retains a capacity of 240 mA h g-1 even after 300 cycles at 0.1 A g-1. DFT calculations revealed that multi-size polyhedron layers in the direction perpendicular to the two Li movement channels aid in the sustainable uptake of Li atoms with controlled volume expansion. The structure-mediated flexibility of the metal-rich Cu1.8S lattice during lithiation permits high cyclability with reasonable retention of capacity.
Collapse
Affiliation(s)
- Gourab Karmakar
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India
| | - Adish Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India
| | - Kruti K Halankar
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
| | - Sandeep Nigam
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India
| | - B P Mandal
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India
| | - A P Wadawale
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
| | - G Kedarnath
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India
| | - Anil K Debnath
- Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India.,Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
| |
Collapse
|
6
|
Karmakar G, Tyagi A, Shah AY, Nigam S, Wadawale AP, Kedarnath G, Vats BG, Naveen Kumar N, Singh V. Facile one pot synthesis of highly photoresponsive coinage metal selenides (Cu 1.8Se and Ag 2Se) achieved through novel Cu and Ag pyridylselenolates as molecular precursors. Dalton Trans 2022; 51:12670-12685. [PMID: 35938959 DOI: 10.1039/d2dt01897g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Copper selenide (Cu1.8Se) and silver selenide (Ag2Se) have garnered unprecedented attention as efficient absorber materials for cost-effective and sustainable solar cells. Phase pure preparation of these exotic materials in a nano-regime is highly desirable. This account outlines a simple and easily scalable pathway to Cu1.8Se and Ag2Se nanocrystals using novel complexes [Cu{2-SeC5H2(Me-4,6)2N}]4 (1), [Ag{2-SeC5H2(Me-4,6)2N}]6 (2) and [Ag{2-SeC5H3(Me-5)N}]6·2C6H5CH3 (3·2C6H5CH3) as single source molecular precursors (SSPs). Structural studies revealed that the Cu and Ag complexes crystallize into tetrameric and hexameric forms, respectively. This observed structural diversity in the complexes has been rationalized via DFT calculations and attributed to metal-metal bond endorsed energetics. The thermolysis at relatively lower temperature in oleylamine of complex 1 afforded cubic berzelianite Cu1.8Se and complexes 2 and 3 produced orthorhombic naumannite Ag2Se nanocrystals. The low temperature synthesis of these nanocrystals seems to be driven by the observed preformed Cu4Se4 and Ag6Se6 core in the complexes which have close resemblance with the bulk structure of the final materials (Cu1.8Se and Ag2Se). The crystal structure, phase purity, morphology, elemental composition and band gap of these nanocrystals were determined from pXRD, electron microscopy (SEM and TEM), EDS and DRS-UV, respectively. The band gap of these nanocrystals lies in the range suitable for solar cell applications. Finally, these nanocrystal-based prototype photo-electrochemical cells exhibit high photoresponsivity and stability under alternating light and dark conditions.
Collapse
Affiliation(s)
- Gourab Karmakar
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Adish Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Alpa Y Shah
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Sandeep Nigam
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - A P Wadawale
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - G Kedarnath
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Bal Govind Vats
- Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - N Naveen Kumar
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Vishal Singh
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| |
Collapse
|
7
|
Pandit MA, Hemanth Kumar DS, Ramadoss M, Chen Y, Muralidharan K. Template free-synthesis of cobalt-iron chalcogenides [Co 0.8Fe 0.2L 2, L = S, Se] and their robust bifunctional electrocatalysis for the water splitting reaction and Cr(vi) reduction. RSC Adv 2022; 12:7762-7772. [PMID: 35424756 PMCID: PMC8982282 DOI: 10.1039/d2ra00447j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 12/01/2022] Open
Abstract
The ease of production of materials and showing multiple applications are appealing in this modern era of advanced technology. This paper reports the synthesis of a pair of novel cobalt-iron chalcogenides [Co0.8Fe0.2S2 and Co0.8Fe0.2Se2] with enhanced electro catalytic activities. These ternary metal chalcogenides were synthesized by a one-step template-free approach via a hexamethyldisilazane (HMDS)-assisted synthetic method. Transient photocurrent (TPC) studies and electrochemical impedance spectra (EIS) of these materials showed free electron mobility. Their bifunctional activities were verified in both the electrochemical oxygen evolution reaction (OER) and in the electrochemical reduction of toxic inorganic heavy metal ions [Cr(vi)] in polluted water. The materials showed robust catalytic ability in the oxygen evolution reaction with minimum possible over potential (345 and 350 mV @ η10) as determined by linear sweep voltammetry and the lower Tafel values (52.4 and 84.5 mV dec-1) for Co0.8Fe0.2Se2 and Co0.8Fe0.2S2 respectively. Surprisingly, both the materials also showed an excellent activity towards electrochemical Cr(vi) reduction to Cr(iii). Besides the maximum current achieved for Co0.8Fe0.2S2, a minimum value for the Limit of detection (LOD) was obtained for Co0.8Fe0.2S2 (0.159 μg L-1) compared to Co0.8Fe0.2Se2 (0.196 μg L-1). We tested the durability of catalysts, the critical factor for the prolonged use of catalysts, through the recyclability measurements of these materials as catalysts. Both the catalysts presented outstanding durability and balanced electro catalytic activities for up to 1500 CV cycles, and chronoamperometry studies also confirmed exceptional stability. The enhanced catalytic activities of these materials are ascribed to the free electron movement, evidenced by the increased TPC measured and EIS. Therefore, the template-free synthesis of these electro catalysts containing non-noble metal illustrates the practical approach to develop such types of catalysts for multiple functions.
Collapse
Affiliation(s)
| | | | - Manigandan Ramadoss
- School of Chemistry, University of Hyderabad Hyderabad India
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 PR China
| | - Yuanfu Chen
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 PR China
| | | |
Collapse
|
8
|
Zargarpour M, Jamali-Sheini F, Cheraghizade M. Sonochemical synthesis of Fe-doped Cu3Se2 nanoparticles: Correlation of the strain and electrical properties for optoelectronics applications. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.07.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
9
|
Nouri M, Zare-Dehnavi N, Jamali-Sheini F, Yousefi R. Synthesis and characterization of type-II p(CuxSey)/n(g-C3N4) heterojunction with enhanced visible-light photocatalytic performance for degradation of dye pollutants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124656] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
10
|
Nouri M, Yousefi R, Zare-Dehnavi N, Jamali-Sheini F. Tuning crystal phase and morphology of copper selenide nanostructures and their visible-light photocatalytic applications to degrade organic pollutants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124196] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
Wei R, Tian X, Luo H, Liu M, Yang Z, Luo Z, Zhu H, Guo H, Li J, Qiu J. Heavily Doped Semiconductor Colloidal Nanocrystals as Ultra-Broadband Switches for Near-Infrared and Mid-Infrared Pulse Lasers. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40416-40423. [PMID: 31592628 DOI: 10.1021/acsami.9b10949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Heavily self-doped semiconductors can be designed to be used in advanced photonics due to both fabrication and functional advantages. Ultrafast response, strong optical nonlinearity, broadband wavelength range, and accessibility of integration are major challenges for ultrafast all-optical photonics to operate in the infrared wavelength range. Here, solution-processed Cu1.8Se semiconductor nanocrystals (NCs) demonstrate an ultrafast response (about 360-520 fs), strong optical nonlinearity (as large as -1.4 × 103 cm GW-1), and broadband (from 800 to 3000 nm) nonlinear optical absorption in the near-infrared and mid-infrared wavelength ranges. The ultrafast response and larger optical nonlinearity may be triggered by the plasma ground-state bleaching in the strong surface electromagnetic filed. Stable Q-switched lasers in Er-doped fiber laser, Tm-doped fiber laser, and Ho/Pr-codoped ZBLAN fiber laser are operated, respectively. These findings indicate that Cu1.8Se NCs are prospective nonlinear materials for ultrafast response and broadband pulse laser.
Collapse
Affiliation(s)
- Rongfei Wei
- Department of Physics , Zhejiang Normal University , Jinhua 321004 , Zhejiang , P. R. China
| | - Xiangling Tian
- State Key Laboratory of Luminescent Materials and Devices and School of Materials Science and Engineering , South China University of Technology , Wushan Road 381 , Guangzhou 510641 , P. R. China
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , 637371 , Singapore
| | - Hongyu Luo
- School of Optoelectronic Science and Engineering , University of Electronic Science and Technology of China , Chengdu 610054 , Sichuan , P. R. China
| | - Meng Liu
- School of Information and Optoelectronic Science and Engineering , South China Normal University , No. 378, West Waihuan Road , Guangzhou 510006 , P. R. China
| | | | - Zhichao Luo
- School of Information and Optoelectronic Science and Engineering , South China Normal University , No. 378, West Waihuan Road , Guangzhou 510006 , P. R. China
| | | | - Hai Guo
- Department of Physics , Zhejiang Normal University , Jinhua 321004 , Zhejiang , P. R. China
| | - Jianfeng Li
- School of Optoelectronic Science and Engineering , University of Electronic Science and Technology of China , Chengdu 610054 , Sichuan , P. R. China
| | - Jianrong Qiu
- State Key Laboratory of Luminescent Materials and Devices and School of Materials Science and Engineering , South China University of Technology , Wushan Road 381 , Guangzhou 510641 , P. R. China
| |
Collapse
|
12
|
Ida S, Wilson P, Neppolian B, Sathish M, Karthik P, Ravi P. Ultrasonically aided selective stabilization of pyrrolic type nitrogen by one pot nitrogen doped and hydrothermally reduced Graphene oxide/Titania nanocomposite (N-TiO 2/N-RGO) for H 2 production. ULTRASONICS SONOCHEMISTRY 2019; 57:62-72. [PMID: 31208620 DOI: 10.1016/j.ultsonch.2019.04.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/22/2019] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
Herein, we report the simultaneous doping of nitrogen on TiO2 and reduced graphene oxide (N-TiO2/N-RGO) with exclusive stabilization of pyrrolic type nitrogen on RGO network by ultrasonic conditions followed by hydrothermal method for efficient photocatalytic H2 production. Interestingly, during synthesis of N-TiO2/N-RGO composite, pyrrolic type nitrogen in RGO has been exclusively stabilized as confirmed by XPS analysis. The exclusive stabilization of pyrrolic nitrogen changed the optical and electronic properties of N-TiO2/N-RGO nanocomposites by giving two π-electrons to the system for extended conjugation, which enhanced the optical absorption and charge carrier separation efficiency as confirmed by UV-Vis DRS and PL studies. Notably, N-TiO2/N-RGO nanocomposite demonstrated. This enhanced photocatalytic activity can be ascribed to synergetic action of N-TiO2 and N-RGO in optical and photogenerated charge carrier separation. Moreover, the plausible mechanism for exclusive stabilization of pyrrolic type nitrogen and enhanced photocatalytic activity were also proposed.
Collapse
Affiliation(s)
- S Ida
- Department of Chemistry, Madras Christian College (Autonomous), Chennai 600059, Tamil Nadu, India
| | - P Wilson
- Department of Chemistry, Madras Christian College (Autonomous), Chennai 600059, Tamil Nadu, India.
| | - B Neppolian
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - M Sathish
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
| | - P Karthik
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - P Ravi
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
| |
Collapse
|
13
|
Sakthivel M, Ramaraj S, Chen SM, Dinesh B, Ramasamy HV, Lee Y. Entrapment of bimetallic CoFeSe2 nanosphere on functionalized carbon nanofiber for selective and sensitive electrochemical detection of caffeic acid in wine samples. Anal Chim Acta 2018; 1006:22-32. [DOI: 10.1016/j.aca.2017.12.044] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/23/2017] [Accepted: 12/27/2017] [Indexed: 11/24/2022]
|
14
|
Kumar S, Verma A, Pal S, Sinha I. Curcumin-Functionalized Ag/Ag 2 O Nanocomposites: Efficient Visible-Light Z-scheme Photocatalysts. Photochem Photobiol 2018; 94:641-649. [PMID: 29438581 DOI: 10.1111/php.12910] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/29/2017] [Indexed: 11/27/2022]
Abstract
Curcumin-functionalized Ag/Ag2 O (c-Ag/Ag2 O) nanocomposites with varying proportions of curcumin and Ag/Ag2 O were prepared by a simple one pot green synthesis protocol in aqueous medium. The plasmonic band undergoes slight redshift, broadening and decrease in intensity with increase in the proportion of Ag2 O formed. These composite nanoparticles were found to be efficient visible-light photocatalysts for aerobic oxidation of methyl orange and rhodamine B (RhB). Functionalization by curcumin significantly enhanced the photocatalytic activity with good reusability. The photocatalytic oxidation rate showed super linear increase with light intensity because of localized surface plasmon resonance (LSPR)-induced strong near field. The trapping experiments confirmed that superoxide radicals were the main active species responsible for the degradation reaction. A plasmonic Z-scheme photocatalytic mechanism is proposed to explain the possible charge transfer and separation behavior of electron-hole pairs among Ag, Ag2 O and curcumin under visible-light irradiation.
Collapse
Affiliation(s)
- Sunil Kumar
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Alkadevi Verma
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Shaili Pal
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Indrajit Sinha
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| |
Collapse
|
15
|
Synthesis of crystalline umangite phase of copper selenide (Cu3Se2) for TiO2 photoanode-based solar cell application. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3682-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
16
|
Nanoscale in Photocatalysis. NANOMATERIALS 2017; 7:nano7040086. [PMID: 28420182 PMCID: PMC5408178 DOI: 10.3390/nano7040086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 11/17/2022]
|