GB/T 37225-2018 English PDF

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GB/T 37225-2018: Nanotechnology -- Characterization of multiwall carbon nanotube in aqueous solution -- Extinction spectroscopy
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37225-2018	279	Add to Cart	3 days	Nanotechnology -- Characterization of multiwall carbon nanotube in aqueous solution -- Extinction spectroscopy	Valid

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Basic data

Standard ID: GB/T 37225-2018 (GB/T37225-2018)
Description (Translated English): Nanotechnology -- Characterization of multiwall carbon nanotube in aqueous solution -- Extinction spectroscopy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G30
Classification of International Standard: 71.040.50
Word Count Estimation: 14,198
Date of Issue: 2018-12-28
Date of Implementation: 2018-12-28
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37225-2018: Nanotechnology -- Characterization of multiwall carbon nanotube in aqueous solution -- Extinction spectroscopy

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Nanotechnology--Characterization of multiwall carbon nanotube in aqueous solution--Extinction spectroscopy ICS 71.040.50 G30 National Standards of People's Republic of China Characterization of multi-walled carbon nanotubes in nanotechnology aqueous solution Extinction spectroscopy Published on.2018-12-28 2018-12-28 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Basic Principles 1 5 instruments and equipment 2 6 reagent 3 7 Preparation of sample 3 8 Measurement method 3 9 Measurement results 3 Appendix A (informative) Example 4 of extinction spectroscopy of different multi-walled carbon nanotubes dispersed in aqueous solution Appendix B (informative) Example of extinction spectroscopy for multi-walled carbon nanotubes dispersed in aqueous solution at different degrees of oxidation Appendix C (informative) Example 7 of extinction spectroscopy of multi-walled carbon nanotubes dispersed in aqueous solution Appendix D (informative) Test report format for the determination of the properties of multi-walled carbon nanotubes by extinction spectroscopy Reference 9

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. 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). This standard was drafted. Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Shenzhen Defang Nano Technology Co., Ltd. The main drafters of this standard. Xu Haiyan, Meng Jie, Wen Tao, Zhang Weiqi, Kong Lingyong, Wang Yuying.

Introduction

Carbon nanotubes have broad application prospects in drug (gene) delivery, biomedical detection and imaging. This standard uses carbon nano The tube has a conjugated π-electron system, which can absorb the ultraviolet light and the physical properties of the electronic transition, and the multi-wall carbon nanotubes are used by extinction spectroscopy. The aqueous solution was tested to give the characteristic extinction spectrum of multi-walled carbon nanotubes; and the extinction spectrum was further obtained by peak-spin fitting analysis. The correlation with the length of the multi-walled carbon nanotubes and the surface oxidation state plays an important role in detecting and aligning the physical and chemical properties of the carbon nanotubes. Characterization of multi-walled carbon nanotubes in nanotechnology aqueous solution Extinction spectroscopy

1 Scope

This standard specifies the method of characterizing multi-walled carbon nanotubes dispersed in aqueous solution by extinction spectroscopy, and gives the extinction spectrum and The relationship between the length of the carbon nanotubes and the oxidation state of the surface. This standard applies to aqueous solutions of multi-walled carbon nanotubes.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 9721-2006 General rules for molecular absorption spectrophotometry of chemical reagents (UV and visible light)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Multiwall carbon nanotubes multiwalcarbonnanotube; MWCNT Carbon nanotubes nested by concentric or nearly concentric carbon monolayers with a layer spacing close to that of graphite. Note. The structure can be seen as a number of single-walled carbon nanotubes nested inside each other; the cross-section is cylindrical when the diameter is small, and becomes a polygon as the diameter increases. [GB/T 30544.3-2015, definition 4.6]. 3.2 Extinction spectrum extinctionspectrum When the concentration of the substance to be tested and the thickness of the mater are constant, the extinction (or any function of the extinction) corresponds to the wavelength (or any function of the wavelength) Curve. [GB/T 33249-2016, definition 3.1].

4 Basic principles

Carbon nanotubes have a conjugated π-electron system, which can absorb ultraviolet light and undergo electronic transition, and multi-walled carbon nanotubes dispersed in an aqueous solution A characteristic extinction zone appears in the ultraviolet region, and the carbon nanoparticle obtained according to the ultraviolet/visible/near infrared absorption spectroscopy method of GB/T 9721-2006 Tube extinction spectrum, as shown in Figure 1. ......

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