|
US$529.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42310-2023: Nanotechnology - Measurement for specific surface area of graphene powder - Static volumetric method by argon gas adsorption
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 42310-2023 | English | 529 |
Add to Cart
|
5 days [Need to translate]
|
Nanotechnology - Measurement for specific surface area of graphene powder - Static volumetric method by argon gas adsorption
| Valid |
GB/T 42310-2023
|
PDF similar to GB/T 42310-2023
Basic data | Standard ID | GB/T 42310-2023 (GB/T42310-2023) | | Description (Translated English) | Nanotechnology - Measurement for specific surface area of graphene powder - Static volumetric method by argon gas adsorption | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G04 | | Classification of International Standard | 71.040.50 | | Word Count Estimation | 27,245 | | Date of Issue | 2023-03-17 | | Date of Implementation | 2023-10-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42310-2023: Nanotechnology - Measurement for specific surface area of graphene powder - Static volumetric method by argon gas adsorption
---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.
ICS71:040:50
CCSG04
National Standards of People's Republic of China
Determination of specific surface area of nanotechnology graphene powder
Argon Adsorption Static Volumetric Method
Released on 2023-03-17
2023-10-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 2
5 Reagent or material 3
6 Instruments and equipment 4
7 Test process 4
8 Experimental data processing 5
9 Measurement uncertainty7
10 Test report 7
Appendix A (informative) Adsorption behavior of different adsorbates on the surface of graphene powder samples9
Appendix B (informative) Research on heat of adsorption of different types of graphene powder samples13
Appendix C (informative) Test example of relationship between specific surface area and sample volume 16
Appendix D (informative) Thermogravimetric analysis to determine the degassing temperature test example of the test sample 18
Appendix E (informative) BET specific surface area calculation point selection process of graphene powder containing micropores 19
Reference 21
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document was proposed by the Chinese Academy of Sciences:
This document is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279):
This document was drafted by: National Nanoscience Center, China Institute of Metrology, Guangzhou Special Pressure Equipment Testing and Research Institute, Best
Instrument Technology (Beijing) Co:, Ltd:, Beijing Graphene Research Institute, Qingdao Huagao Graphene Technology Co:, Ltd:, Metallurgical Industry Information Standard Research Institute
Research Institute, Beijing Low-Carbon Clean Energy Research Institute, Zhejiang Normal University, Taizhou Feirongda New Material Technology Co:, Ltd:, Chinese Academy of Sciences Shanxi Coal
Institute of Chemistry:
The main drafters of this document: Yan Xiaoying, Liu Renxiao, Ge Guanglu, Ren Lingling, Yin Zongjie, Li Maodong, Liu Jianfeng, Yang Zhaojin, Zhang Ronghua,
Liu Xu, Guo Hongyun, Li Qian, Liu Congmin, Dai Wei, He Liliang, Liu Hongwei, Lu Junpeng, Huang Xianhong:
Introduction
The specific surface area of graphene powder is one of the key characteristic parameters affecting its application performance: Nitrogen adsorption (Brunauer-Emmett-
Teler) method is a common method for testing the specific surface area of solid substances, but its applicable premise is that nitrogen is used as the adsorbate on the surface of solid adsorbent:
The adsorption behavior fits the ideal classical physical adsorption model: There are various types of industrialized graphene powder in my country, and different types of samples contain different
Intra-sheet defects, sheet edge dislocations, grain boundaries, etc:, make the chemical activity and number of carbon atoms in the above places also exist:
difference: In addition, due to different production processes, the functional groups (such as -OH) introduced on the surface of different types of powder samples are also different: nitrogen
Gas molecules have a quadrupole moment, and as an adsorbate, they will interact with polar adsorbents to form specific adsorption, which is different from ideal classical physical adsorption:
The molecular arrangement and orientation of the model may cause poor linear correlation of the multi-point BET diagram, so the accuracy and reliability of the specific surface area test results
Sex is also poor: The adsorption behavior of different adsorbates on the surface of graphene powder is shown in Appendix A:
Argon molecules are monatomic gas molecules, electrons have been completely paired and there is no bonding orbital, and it is generally considered to have no chemical activity:
sex: There is no quadrupole moment for argon molecules, and when adsorbed on the surface of graphene powder materials as an adsorbate, it is sensitive to the surface structure or functional groups of the sample:
The sensitivity is low, and its adsorption behavior conforms to the ideal classical physical adsorption model, so when the specific surface area is measured at the temperature of liquid argon, the classical physical adsorption model can be used:
BET theory for calculations: Since the polarizability and molecular size of argon and nitrogen are very similar, their non-specific adsorption properties are also very similar:
Similarly, on nonpolar adsorbents, the heat of adsorption of nitrogen is almost equal to that of argon: For polar graphene powder materials, argon and nitrogen
There is a significant difference in the heat of adsorption of argon and gas (see Appendix B for relevant examples), which further confirms that the use of argon as the adsorbate to determine the graphene powder ratio
The science and plausibility of surface area:
Determination of specific surface area of nanotechnology graphene powder
Argon Adsorption Static Volumetric Method
1 Scope
This document describes a method for the determination of the specific surface area of graphene powders by the argon adsorption static volumetric method:
This document is applicable to the determination of adsorption isotherms with type II (dispersed, non-porous or macroporous) and type IV (mesoporous, pore size 2nm~50nm)
Specific surface area of graphene powder: Contains a small amount of micropores, and the adsorption isotherm shows a combination of type II and type I or a combination of type IV and type I
It is also applicable to the determination of specific surface area of graphene powder: Other types of carbon-based nanomaterials, such as carbon nanotubes, carbon fibers, porous carbon, etc:
The determination of the volume refers to the use:
2 Normative references
This document has no normative references:
3 Terms and Definitions
The following terms and definitions apply to this document:
3:1
graphene graphene
graphene layer graphenelayer
single-layer graphene single-layergraphene; monolayergraphene
A monolayer of carbon atoms that combines one carbon atom with three surrounding carbon atoms to form a honeycomb structure:
NOTE 1: It is an important building block of many carbon nanoobjects:
Note 2: Since graphene has only one layer, it is often called monolayer graphene: Graphene is abbreviated as 1LG to distinguish it from bilayer graphite abbreviated as 2LG
ene and few-layer graphene abbreviated as FLG:
NOTE 3: Graphene has boundaries and has defects and grain boundaries where carbon-carbon bonds have been disrupted:
[Source: GB/T 30544:13-2018, 3:1:2:1]
3:2
Graphene powder graphene powder
It is a black or brownish-yellow powder mainly composed of graphene and related two-dimensional materials:
Note: Graphene powder includes single-layer graphene (1LG), double-layer graphene (2LG), few-layer graphene (FLG), graphene nanosheet (GNP), mechanical exfoliation stone
Graphene, chemically dissociated graphene, small molecule synthesis (CVD, PVD) graphene, reduced graphene oxide (rGO), graphene oxide (GO), etc:
3:3
Nanosheets made of graphene layers:
NOTE: The common thickness of GNPs is 1 nm to 3 nm, and the lateral dimensions range from approximately 100 nm to 100 µm:
[Source: GB/T 30544:13-2018, 3:1:2:11]
3:4
graphene oxide graphene oxide; GO
The chemically modified graphene obtained after oxidation and exfoliation of graphite has its basal plane modified by strong oxidation:
|