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Liu Y, Qin Z, Jia X, Zhou J, Li H, Wang X, Chen Y, Deng J, Jin Z, Wang G. Directly and ultrasensitivity detecting SARS-CoV-2 spike protein in pharyngeal swab solution by using SERS-based biosensor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123275. [PMID: 37611522 DOI: 10.1016/j.saa.2023.123275] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/10/2023] [Accepted: 08/16/2023] [Indexed: 08/25/2023]
Abstract
The global pandemic of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a great disaster to the economy and human society. Nowadays, SARS-CoV-2 is fading away from people's memory but it still exists around us. PCR plays an important role in detecting SARS-CoV-2 but it requires a long detecting time, equipped laboratory, and professional operators. In comparison with polymerase chain reaction (PCR), surface-enhanced Raman scattering (SERS) is a promising method for detecting SARS-CoV-2 due to its fast, easily operated, and high-sensitivity properties. In this study, the monolayer Ag nanoparticles (MAgNPs) covered with single-layer graphene (SLG) are applied as a SERS substrate. The angiotensin converting enzyme 2 (ACE2) is selected as a bio-probes that can specifically bind to the SARS-CoV-2 S protein. The SERS-based biosensor is formed by ACE2 functionalized SLG/MAgNPs and the LODs of detecting SARS-CoV-2 S protein in phosphate-buffered saline (PBS) and in pharyngeal swabs solution (PSS) are 0.1 fg mL-1 and 10 fg mL-1, respectively. This biosensor provides a way of directly detecting SARS-CoV-2 S protein with high sensitivity and specificity. It illustrates a practical potential in the rapid detection of the SARS-CoV-2 virus.
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Affiliation(s)
- Yansheng Liu
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China.
| | - Zhenle Qin
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Xiaobo Jia
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Jin Zhou
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Hongli Li
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Xiaohong Wang
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Yating Chen
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Junpeng Deng
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
| | - Zhicheng Jin
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Guofu Wang
- School of Electronic Engineering, Guangxi University of Science and Technology, No.2, Wenchang Road, Liuzhou City 545006, Guangxi, China
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2
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Kabański A, Ptak M, Stefańska D. Metal-Organic Framework Optical Thermometer Based on Cr 3+ Ion Luminescence. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7074-7082. [PMID: 36710446 PMCID: PMC9923675 DOI: 10.1021/acsami.2c19957] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Metal-organic frameworks with perovskite structures have recently attracted increasing attention due to their structural, optical, and phonon properties. Herein, we report the structural and luminescence studies of a series of six heterometallic perovskite-type metal-organic frameworks with the general formula [EA]2NaCrxAl1-x(HCOO)6, where x = 1, 0.78, 0.57, 0.30, 0.21, and 0. The diffuse reflectance spectral analysis provided valuable information, particularly on crystal field strength (Dq/B) and energy band gap (Eg). We showed that the Dq/B varies in the 2.33-2.76 range depending on the composition of the sample. Performed Raman, XRD, and lifetime decay analyses provided information on the relationship between those parameters and the chemical composition. We also performed the temperature-dependent luminescence studies within the 80-400 K range, which was the first attempt to use an organic-inorganic framework luminescence thermometer based solely on the luminescence of Cr3+ ions. The results showed a strong correlation between the surrounding temperature, composition, and spectroscopic properties, allowing one to design a temperature sensing model. The temperature-dependent luminescence of the Cr3+ ions makes the investigated materials promising candidates for noncontact thermometers.
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3
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Li J, She Q, Wang W, Liu R, You R, Wu Y, Weng J, Liu Y, Lu Y. Label-Free SERS Analysis of Serum Using Ag NPs/Cellulose Nanocrystal/Graphene Oxide Nanocomposite Film Substrate in Screening Colon Cancer. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:334. [PMID: 36678088 PMCID: PMC9864651 DOI: 10.3390/nano13020334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/07/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Label-free surface-enhanced Raman scattering (SERS) analysis shows tremendous potential for the early diagnosis and screening of colon cancer, owing to the advantage of being noninvasive and sensitive. As a clinical diagnostic tool, however, the reproducibility of analytical methods is a priority. Herein, we successfully fabricated Ag NPs/cellulose nanocrystals/graphene oxide (Ag NPs/CNC/GO) nanocomposite film as a uniform SERS active substrate for label-free SERS analysis of clinical serum. The Ag NPs/CNC/GO suspensions by self-assembling GO into CNC solution through in-situ reduction method. Furthermore, we spin-coated the prepared suspensions on the bacterial cellulose membrane (BCM) to form Ag NPs/CNC/GO nanocomposite film. The nanofilm showed excellent sensitivity (LOD = 30 nM) and uniformity (RSD = 14.2%) for Nile Blue A detection. With a proof-of-concept demonstration for the label-free analysis of serum, the nanofilm combined with the principal component analysis-linear discriminant analysis (PCA-LDA) model can be effectively employed for colon cancer screening. The results showed that our model had an overall prediction accuracy of 84.1% for colon cancer (n = 28) and the normal (n = 28), and the specificity and sensitivity were 89.3% and 71.4%, respectively. This study indicated that label-free serum SERS analysis based on Ag NPs/CNC/GO nanocomposite film combined with machine learning holds promise for the early diagnosis of colon cancer.
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Affiliation(s)
- Jie Li
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Qiutian She
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Wenxi Wang
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Ru Liu
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Ruiyun You
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Yaling Wu
- College of Materials and Chemical Engineering, Institute of Oceanography Minjiang University, Fuzhou 350108, China
| | - Jingzheng Weng
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Yunzhen Liu
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Yudong Lu
- Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
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4
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Wang C, Zhang H, Wang C. Sensitive detection of ferbam by coupling solid phase microextraction with surface enhanced Raman spectroscopy based on Au nano-glass capillary. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 272:120960. [PMID: 35158138 DOI: 10.1016/j.saa.2022.120960] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
In this study, we developed an innovative approach that combines solid phase microextraction (SPME) with surface-enhanced Raman spectroscopy (SERS) to detect pesticide ferbam rapidly. An Au nano-glass capillary was fabricated by coating template-freely synthesized three-dimensional network Au nanostructures (3D-NW AuNSs) on the roughened surface of glass capillary and used for SPME and SERS respectively. Significant Raman signals were obtained by the SPME-SERS method, followed by detection of ferbam in water and orange juice samples with only 1 min SPME process. Results showed that Au nano-glass capillaries could achieve the detection of ferbam with limit of detection of 0.05 μg/L, and coefficient of determination (R2) of 0.9913. The recovery of predicted results was in the range of 88.46-103.29% and the relative standard deviation (RSD) was 3.5-8.2%. This study demonstrated potential capability of the SPME-SERS method for rapid (within 1 min) and sensitive detection of organic compounds in complex matrices. The SERS-active Au nano-glass capillary is easy to carry and operate, and is expected to play a role in the detection of trace pollutants.
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Affiliation(s)
- Cuiping Wang
- School of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China
| | - Huan Zhang
- School of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China
| | - Chunrong Wang
- School of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.
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5
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Murugan E, Santhoshkumar S, Govindaraju S, Palanichamy M. Silver nanoparticles decorated g-C 3N 4: An efficient SERS substrate for monitoring catalytic reduction and selective Hg 2+ions detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:119036. [PMID: 33070011 DOI: 10.1016/j.saa.2020.119036] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/02/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Graphitic carbon nitride supported Ag NPs(AgNPs@g-C3N4) were synthesized by an in-situ chemical reduction using a green reducing agent, tannic acid. They were characterized by UV-Vis, FTIR, XPS, XRD, FESEM, EDAX and HRTEM. They were very much SERS sensitive, and capable of detecting methylene blue and 4-aminothiophenol at 1 × 10-12 M and 1 × 10-10 M, respectively with the corresponding SERS enhancement factor of 1.4 × 108 and 4.7 × 107. Apart from its high SERS sensitivity, it exhibited high catalytic activity for the reduction of MB with NaBH4. So, their SERS activity and catalytic activity were combined successfully to monitor catalytic reduction of MB by SERS technique. Further, the SERS activity towards MB was also employed for the detection/quantification of free Hg2+ ions in aqueous solution. The SERS intensity of MB drastically decreased in the presence of Hg2+ ions, and hence it provides novel route to detect and quantify the latter. Presence of Ca2+, Mg2+, Cu2+ and Cd2+ions showed zero interference for it. So, this study proves that Ag NPs@g-C3N4 as a unique substrate for multiple SERS applications.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India.
| | - S Santhoshkumar
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - S Govindaraju
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - M Palanichamy
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
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6
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Oliveira EGDL, de Oliveira HP, Gomes ASL. Metal nanoparticles/carbon dots nanocomposites for SERS devices: trends and perspectives. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03306-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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7
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Jin X, Shi G, Zhu H, Ni C, Li Y. Fabricating Biomimetic Antireflective Coating Based on TiO
2
Pyramids by Soft Lithography. ChemistrySelect 2019. [DOI: 10.1002/slct.201902210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuan Jin
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University Wuxi 214122 China
| | - Gang Shi
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University Wuxi 214122 China
| | - Haiyan Zhu
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University Wuxi 214122 China
| | - Caihua Ni
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University Wuxi 214122 China
| | - Ying Li
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University Wuxi 214122 China
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8
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Facile Fabrication of Micro/Nano Hierarchical SERS Sensor via Anisotropic Etching and Electrochemical Treatment for Malachite Green Detection. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9235237] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We propose a facile method to produce micro/nano hierarchical surface-enhanced Raman scattering (SERS) active substrates using simple steps and inexpensive costs. The proposed SERS substrate is a silicon pyramid array covered by a nanostructured gold film (AuNS @ SiPA). Through finite element method (FEM) simulation, we showed that many strong local electric field enhancements (hot spots) were formed between the nano-gap of gold nanostructures. In addition, the micron-scale pyramid structure not only increases the sensing surface area of the sensor, but also helps trap light. By combining these micro and nano structures, the proposed micro/nano hierarchical SERS sensor exhibited high sensitivity. Experimental results confirmed that the AuNS @ SiPA substrate has high sensitivity. The SERS signal enhancement factor obtained from the Rhodamine 6G (R6G) probe molecules was as high as 1 × 107 and the SERS substrates were found to be able to detect a very low concentration of 0.01 nM malachite green (MG) solution. Therefore, this study provides a novel and practical method for fabricating SERS substrates that can facilitate the use of SERS in medicine, food safety, and biotechnology.
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9
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Naqvi T, Sree Satya Bharati M, Srivastava AK, Kulkarni MM, Siddiqui AM, Rao SV, Dwivedi PK. Hierarchical Laser-Patterned Silver/Graphene Oxide Hybrid SERS Sensor for Explosive Detection. ACS OMEGA 2019; 4:17691-17701. [PMID: 31681875 PMCID: PMC6822111 DOI: 10.1021/acsomega.9b01975] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 10/07/2019] [Indexed: 05/22/2023]
Abstract
We demonstrate an ultrafast laser-ablated hierarchically patterned silver nanoparticle/graphene oxide (AgNP/GO) hybrid surface-enhanced Raman scattering (SERS) substrate for highly sensitive and reproducible detection of an explosive marker 2,4-dinitrotoluene (2,4-DNT). A hierarchical laser-patterned silver sheet (Ag-S) is achieved by ultrafast laser ablation in air with pulse energies of 25, 50, and 100 μJ. Multiple laser pulses at a wavelength of 800 nm and a pulse repetition rate of 50 fs at 1 kHz are directly focused on Ag-S to produce and deposit AgNPs onto Ag-S. The surface morphology of ablated Ag-S was evaluated using atomic force microscopy, optical profilometry, and field emission scanning electron microscopy (FESEM). A rapid increase in the ablation rate with increasing laser energy was observed. Selected area Raman mapping is performed to understand the intensity and size distribution of AgNPs on Ag-S. Further, GO was spin-coated onto the AgNPs produced by ultrafast ablation on Ag-S. The hierarchical laser-patterned AgNP/GO hybrid structure was characterized using FESEM, high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. Further, hierarchical laser-patterned AgNP/GO hybrid structures have been utilized as SERS-active substrates for the selective detection of 2,4-DNT, an explosive marker. The developed SERS-active sensor shows good stability and high sensitivity up to picomolar (pM) concentration range with a Raman intensity enhancement of ∼1010 for 2,4-DNT. The realized enhancement of SERS intensity is due to the cumulative effect of GO coated on Ag-S as a proactive layer and AgNPs produced by ultrafast ablation.
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Affiliation(s)
- Tania
K. Naqvi
- Center
for Nanosciences, Indian Institute of Technology
Kanpur, Kanpur 208016, India
- Department
of Physics, Jamia Millia Islamia, New Delhi 110025, India
| | - Moram Sree Satya Bharati
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad 500046, India
| | - Alok K. Srivastava
- Defence
Material and Stores Research and Development Establishment, Kanpur 208013, India
| | - Manish M. Kulkarni
- Center
for Nanosciences, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Azher M. Siddiqui
- Department
of Physics, Jamia Millia Islamia, New Delhi 110025, India
| | - S. Venugopal Rao
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad 500046, India
- E-mail: (S.V.R.)
| | - Prabhat K. Dwivedi
- Center
for Nanosciences, Indian Institute of Technology
Kanpur, Kanpur 208016, India
- E-mail: (P.K.D.)
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10
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Myndrul V, Iatsunskyi I. Nanosilicon-Based Composites for (Bio)sensing Applications: Current Status, Advantages, and Perspectives. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2880. [PMID: 31489913 PMCID: PMC6766027 DOI: 10.3390/ma12182880] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/18/2022]
Abstract
This review highlights the application of different types of nanosilicon (nano-Si) materials and nano-Si-based composites for (bio)sensing applications. Different detection approaches and (bio)functionalization protocols were found for certain types of transducers suitable for the detection of biological compounds and gas molecules. The importance of the immobilization process that is responsible for biosensor performance (biomolecule adsorption, surface properties, surface functionalization, etc.) along with the interaction mechanism between biomolecules and nano-Si are disclosed. Current trends in the fabrication of nano-Si-based composites, basic gas detection mechanisms, and the advantages of nano-Si/metal nanoparticles for surface enhanced Raman spectroscopy (SERS)-based detection are proposed.
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Affiliation(s)
- Valerii Myndrul
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61-614 Poznan, Poland.
| | - Igor Iatsunskyi
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61-614 Poznan, Poland.
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11
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Siong VLE, Lee KM, Juan JC, Lai CW, Tai XH, Khe CS. Removal of methylene blue dye by solvothermally reduced graphene oxide: a metal-free adsorption and photodegradation method. RSC Adv 2019; 9:37686-37695. [PMID: 35542257 PMCID: PMC9075724 DOI: 10.1039/c9ra05793e] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 11/12/2019] [Indexed: 11/21/2022] Open
Abstract
In this work, reduced graphene oxide (rGO) was fabricated at different reduction temperatures via an environmentally friendly solvothermal approach. The rGO formed at 160 °C clearly showed the partial restoration of the sp2 hybridization brought about by the elimination of oxygenated functionalities from the surface. Owing to the augmented surface area and the band gap reduction, rGO-160 exhibited the best adsorption (29.26%) and photocatalytic activity (32.68%) towards the removal of MB dye. The effects of catalyst loading, initial concentration of dye, light intensity, and initial pH of solution were evaluated. It was demonstrated that rGO-160 could achieve a higher adsorptive removal (87.39%) and photocatalytic degradation (98.57%) of MB dye when 60 mg of catalyst, 50 ppm of dye at pH 11, and 60 W m−2 of UV-C light source were used. The MB photodegradation activity of rGO-160 displayed no obvious decrease after five successive cycles. This study provides a potential metal-free adsorbent-cum-photocatalyst for the decontamination of dyes from wastewater. A metal-free MB dye removal process was carried out by solvothermally synthesized rGO. After optimization, near-complete dye removal was achieved via an adsorption and UV photodegradation route.![]()
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Affiliation(s)
- Valerie Ling Er Siong
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Kian Mun Lee
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Joon Ching Juan
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Xin Hong Tai
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Cheng Seong Khe
- Department of Fundamental and Applied Sciences
- Universiti Teknologi PETRONAS
- Malaysia
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12
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Tai XH, Chook SW, Lai CW, Lee KM, Yang TCK, Chong S, Juan JC. Effective photoreduction of graphene oxide for photodegradation of volatile organic compounds. RSC Adv 2019; 9:18076-18086. [PMID: 35520578 PMCID: PMC9064830 DOI: 10.1039/c9ra01209e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 05/27/2019] [Indexed: 01/21/2023] Open
Abstract
Nowadays, humans spend most of their time indoors and are frequently exposed to volatile organic compounds (VOCs) from various sources. The photocatalytic oxidation (PCO) method is a relatively more efficient method than the adsorption method for removing VOCs from the environment. In this work, graphene oxide (GO) was partially reduced via photoreduction under ultraviolet light (UV-A) irradiation and then used as a photocatalyst to degrade VOCs. After photoreduction, the band gap of the partially reduced graphene oxide (PRGO) decreased from 3.5–4.5 eV to 3.1–4.0 eV. Methanol vapour, which acts as a model VOC, was photodegraded using the PRGO. The effectiveness of the PRGO was mainly due to the removal of oxygen functional groups and restoration of the sp2 domain. This lowered the band gap and slowed down the electron recombination rate, which resulted in a higher photocatalytic activity. The photocatalytic activity of PRGO followed pseudo-first order kinetics, with a rate constant of 0.0025 min−1, and it could be reused for five cycles without any significant loss in the photocatalytic activity. This study demonstrates the potential of PRGO as a versatile and stable metal-free photocatalyst to remove indoor pollutants. Photoreduced graphene oxide has a narrower band gap and better photocatalytic oxidation to degrade methanol.![]()
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Affiliation(s)
- Xin Hong Tai
- Nanotechnology & Catalysis Research Centre (NANOCAT)
- Institute for Advanced Studies (IAS)
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Soon Wei Chook
- Nanotechnology & Catalysis Research Centre (NANOCAT)
- Institute for Advanced Studies (IAS)
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre (NANOCAT)
- Institute for Advanced Studies (IAS)
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Kian Mun Lee
- Nanotechnology & Catalysis Research Centre (NANOCAT)
- Institute for Advanced Studies (IAS)
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Thomas Chung Kuang Yang
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei
- Taiwan
| | - Siewhui Chong
- Department of Chemical and Environmental Engineering
- Faculty of Science and Engineering
- University of Nottingham Malaysia
- Malaysia
| | - Joon Ching Juan
- Nanotechnology & Catalysis Research Centre (NANOCAT)
- Institute for Advanced Studies (IAS)
- University of Malaya
- Kuala Lumpur
- Malaysia
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13
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Wang Z, Wu S, Colombi Ciacchi L, Wei G. Graphene-based nanoplatforms for surface-enhanced Raman scattering sensing. Analyst 2018; 143:5074-5089. [PMID: 30280724 DOI: 10.1039/c8an01266k] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Surface-enhanced Raman scattering (SERS) is one of the important techniques for sensing applications in biological analysis, disease diagnosis, environmental science, and food safety. Graphene provides an excellent nanoplatform for SERS sensing due to its two-dimensional flat structure, uniform electronic and photonic properties, excellent mechanical stability, atomic uniformity, and high biocompatibility. In this review, we summarize recent advances in the fabrication of various graphene-based nanoplatforms for SERS sensing. We present the strategies, such as self-assembly, in situ synthesis, one-pot synthesis, liquid phase reduction, and biomimetic synthesis, for the fabrication of graphene-based hybrid metallic and alloy nanoplatforms, and then demonstrate the potential applications of graphene-based nanoplatforms for the SERS sensing of ions, organic dyes, pesticides, bacteria, DNA, proteins, cells, and other chemicals in great detail. In addition, we also discuss the future development of this interesting research field and provide several perspectives. This work will be helpful for readers to understand the fabrication and sensing mechanisms of graphene-based SERS sensing nanoplatforms; meanwhile, it will promote the development of new materials and novel methods for high performance sensing and biosensing applications.
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Affiliation(s)
- Zhuqing Wang
- AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Anqing Normal University, 246011 Anqing, China
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Liang A, Li C, Wang X, Luo Y, Wen G, Jiang Z. Immunocontrolling Graphene Oxide Catalytic Nanogold Reaction and Its Application to SERS Quantitative Analysis. ACS OMEGA 2017; 2:7349-7358. [PMID: 30023549 PMCID: PMC6044934 DOI: 10.1021/acsomega.7b01335] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 10/06/2017] [Indexed: 05/16/2023]
Abstract
The gold nanoreaction between HAuCl4 and H2O2 is very slow at 50 °C, and the nanoenzyme of graphene oxide (GO) greatly catalyzes the nanoreaction to form gold nanoparticles (AuNPs) with high SERS activity in the presence of Vitoria blue 4R (VB4r) molecular probes, strong resonance Rayleigh scattering (RRS), and surface plasmon resonance (SPR) absorption effect. With the increase of GO, the SERS, RRS, and SPR absorptions were enhanced linearly due to the formation of more AuNPs. The rabit antibody of human chorionic gonadotropin (RHCG) strongly adsorbed on the GO surface to inhibit its catalysis. Upon addition of human chorionic gonadotropin (HCG), the RHCG is separated from the GO surface due to the formation of HCG-RHCG specific immunocomplexes, which led to the recovery of GO catalysis. Using the new strategy of immunocontrolling GO catalysis, three types of resonance methods including SERS, RRS, and surface plasmon resonance (SPR) absorption have been developed for detection of HCG.
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Affiliation(s)
- Aihui Liang
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
| | - Chongning Li
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
| | - Xiaoliang Wang
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
| | - Yanghe Luo
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
- School
of Food and Bioengineering, Hezhou University, 542899 Hezhou, China
| | - Guiqing Wen
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
| | - Zhiliang Jiang
- Key
Laboratory of Ecology of Rare and Endangered Species and Environmental
Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution
Control Theory and Technology, 541004 Guilin, China
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