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Physical & Chemical properties

Additional physico-chemical information

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Administrative data

Endpoint:
additional physico-chemical information
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: JRC technical report - Best available technique

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: BET method
GLP compliance:
yes
Endpoint investigated:
other: Specific Surface area

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: nanoform
Details on test material:
NM-110 - uncoated ZnO
NM-111 - coated ZnO
NM-112 - uncoated ZnO
NM-113 - uncoated ZnO
Materials as described in the report

Results and discussion

Any other information on results incl. tables

Table summarises the results of BET specific surface area measurements. Results show a wide range of the specific surface area values for various NM powders i.e. from 6.2 to 27.2 m2/g. Results show that NM-112 has the largest surface area of 27.2 m2/g and the smallest being NM-113 of 6.2 m2/g. The variation in specific surface area of the zinc oxide samples corresponds well with their inverse proportional variations in particle and crystallite sizes.

Table: Summary of the specific surface area values as obtained by the BET gas adsorption technique; the data are the means of values (± 2 SD) of two replicates acquired on different days. Sample Name Mean BET SSA (m2/g) NM-110 12.4 ± 0.6 NM-111 15.1 ± 0.6 NM-112 27.2 ± 1.2 NM-113 6.2 ± 0.3

Sample Name

Mean BET SSA (m2/g) 

NM-110  12.4 ± 0.6
NM-111   15.1 ± 0.6
NM-112   27.2 ± 1.2
NM-113   6.2 ± 0.3

 

Applicant's summary and conclusion

Conclusions:
wide range of the specific surface area values for various NM powders i.e. from 6.2 to 27.2 m2/g