Supporting Information:
Facile Fabrication of Spherical Architecture of Ni/Al Layered Double
Hydroxide Based on In Situ Transformation Mechanism
Fazhi Zhang*, Yue Zhang, Caili Yue, Rong Zhang, and Yanmin Yang
State Key Laboratory of Chemical Resource Engineering, Beijing University of
Chemical Technology, Beijing 100029, China
E-mail: zhangfz@mail.buct.edu.cn
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Figure S1. SEM images of the samples prepared using only BAA and concentrated
ammonia aqueous solution as raw materials, with different reaction times 0.5 min (a),
1 min (b), 10 min (c), and 24 h (d) at reaction temperature 60 °C.
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Figure S2. XRD patterns of the samples prepared using only BAA and concentrated
ammonia aqueous solution as raw materials, with different reaction times 0.5 min (a),
1 min (b), 10 min (c), and 24 h (d) at reaction temperature 60 °C. XRD pattern of
boehmite crystal (JCPDS No. 83-2384) is included for comparison.
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Figure S3. SEM images and XRD patterns of two production samples obtained with
Al(NO3)3/Ni(NO3)2 (a) and BAA/Ni(NO3)2 (b) as raw materials. Concentrated
ammonia aqueous solution is used as alkali source and the other reaction conditions
are the same as those in Figure 1. Both XRD patterns show characteristic reflections
of LDH phase with carbonate anions intercalated into the gallery for the two LDH
samples.
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Figure S4. SEM images and XRD patterns of two product samples obtained with urea
at 120 ºC (a) and NaOH at 60 ºC (b) as alkali source. BAA and nickel acetate are used
as raw materials and the other reaction conditions are the same as those in Figure 1.
Both XRD patterns show characteristic reflections of LDH phase with carbonate
anions intercalated into the gallery for the two LDH samples.
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Figure S5. XPS spectra of Al 2p (a) and Ni 2p (b) for LDH spherical architectures
obtained with different reaction times. The other reaction conditions are the same as
those in Figure 1.
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Figure S6. SEM images and XRD patterns for the production samples obtained with
different reaction temperature: 50 ºC (a), 70 ºC (b) and 90 ºC (c). The other reaction
conditions are the same as those in Figure 1. SEM image and XRD pattern of LDH
spherical architecture obtained with reaction temperature 60 ºC is shown as Figure 1b.
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Figure S7. SEM images and XRD patterns for the production samples obtained with
different dosage of concentrated ammonia aqueous solution: 5 mL (a), 25 mL (b), and
40 mL (c). The other reaction conditions are the same as those in Figure 1. SEM
image and XRD pattern of LDH spherical architecture obtained with concentrated
ammonia aqueous solution dosage 15 mL is shown as Figure 1b.
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Figure S8. N2-sorption isotherm and pore size distribution (inset) of LDH spherical
architecture and powder sample.
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Table S1. Specific surface areas and pore parameters of LDH spherical architecture
and powder sample.
Sample
Used alkali
BET surface
Average pore
source
area (m2 g-1)
diameter (nm)
LDH spherical architecture
ammonia
284
3-5
LDH powder
NaOH
152
7-15
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