GB/T 39114-2020 English PDF

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GB/T 39114-2020: Nanotechnologies - Characterization of single-wall carbon nanotubes using ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39114-2020	414	Add to Cart	4 days	Nanotechnologies - Characterization of single-wall carbon nanotubes using ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy	Valid

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Basic data

Standard ID: GB/T 39114-2020 (GB/T39114-2020)
Description (Translated English): Nanotechnologies - Characterization of single-wall carbon nanotubes using ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G30
Classification of International Standard: 71.040.50
Word Count Estimation: 22,224
Date of Issue: 2020-10-11
Date of Implementation: 2021-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39114-2020: Nanotechnologies - Characterization of single-wall carbon nanotubes using ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Nanotechnologies - Characterization of single-wall carbon nanotubes using ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy ICS 71.040.50 G30 National Standards of People's Republic of China Nanotechnology single-walled carbon nanotubes UV/Visible/ Near-infrared absorption spectrum characterization method 2020-10-11 released 2021-05-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Preface Ⅲ 1 Scope 1 2 Normative references 1 3 Terms, definitions and abbreviations 1 3.1 Terms and definitions 1 3.2 Abbreviations 1 4 General 2 4.1 Overview 2 4.2 Ultraviolet/visible/near infrared absorption spectroscopy 2 4.3 Optical absorption peaks of SWCNTs in the ultraviolet/visible/near infrared region 2 4.4 The relationship between SWCNT diameter and optical absorption peak 3 4.5 Deriving the purity index from the area of the optical absorption peak 3 4.6 Deriving the ratio of metallic SWCNTs from the optical absorption peak area 4 5 Ultraviolet/visible/near infrared spectrometer 5 6 Sample preparation method 5 6.1 General principles 5 6.2 D2O dispersion sample preparation when measuring the average diameter and ratio of metallic SWCNTs 5 6.3 Preparation of solid film when measuring the average diameter and ratio of metallic SWCNTs 6 6.4 DMF dispersion sample preparation when determining purity index 6 7 Optical measurement procedures and test conditions 6 8 Data analysis and result interpretation 7 8.1 Data analysis of SWCNT diameter characterization 7 8.2 Data analysis to determine the purity index 7 8.3 Data analysis of the ratio of metallic SWCNTs 7 9 Measurement uncertainty 7 10 Test report 8 Appendix A (informative appendix) Deduction example of the relationship between SWCNTs optical absorption peak and average diameter 9 Appendix B (informative appendix) Purity index determination example 14 Reference 16

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the translation method equivalent to ISO /T S10868.2017 ``Nanotechnology single-wall carbon nanotubes UV/visible/near infrared Absorption spectrum characterization method". The Chinese documents that have a consistent correspondence with the international documents cited in this standard are as follows. GB/T 30544.4-2019 Nanotechnology terminology Part 4.Nanostructured materials (ISO /T S80004-4.2011, IDT) This standard has made the following editorial changes. ---Adjust the sorting of references. This standard was proposed by the Chinese Academy of Sciences. This standard is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279). Drafting organizations of this standard. National Nanoscience Center, Institute of Physics, Chinese Academy of Sciences. The main drafters of this standard. Ji Yinglu, Liu Renxiao, Zhou Weiya, Ge Guanglu, Wu Xiaochun, Liu Huaping, Wei Xiaojun. Nanotechnology single-walled carbon nanotubes UV/Visible/ Near-infrared absorption spectrum characterization method

1 Scope

This standard provides guidelines for characterizing single-walled carbon nanotubes (SWCNTs) in mixtures using optical absorption spectroscopy. This standard is applicable to the measurement of sample diameter, purity and the mass fraction of metallic SWCNTs in total SWCNTs. When used for nanotube diameter analysis, the applicable diameter range is 1nm~2nm.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO /T S80004-4 Nanotechnology terminology Part 4.Nanostructured materials 3 Terms, definitions and abbreviations 3.1 Terms and definitions ISO /T S80004-4 and the following terms and definitions apply to this document. 3.1.1 Purity index The ratio of SWCNTs to the total carbon mass fraction in the sample defined by the optical method. Note. The purity index is not the "purity" itself which is usually defined as the percentage of SWCNTs in the total mass of the sample. Cannot be detected due to absorption spectroscopy The metal impurities of SWCNT samples, so this standard is not used to assess conventional purity. The metal impurity content can be determined by the international technical specification of thermogravimetric analysis Characterization. Metal impurities are defined as catalyst metal particles, excluding metallic carbon nanotubes. See ISO /T S11308. 3.1.2 Metallic SWCNTs ratio The composition ratio of metallic SWCNTs defined by the optical method to the total SWCNTs in the sample. 3.2 Abbreviations The following abbreviations apply to this document. CMC. Sodium carboxymethyl cellulose DMF. Dimethylformamide DOS. density of states NIR. Near infrared NMP. N-methyl-2-pyrrolidone SC. Sodium Cholate DOC. Sodium deoxycholate SDS. Sodium Lauryl Sulfate SDBS. Sodium Dodecylbenzene Sulfonate ......

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