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Low-temperature precipitation synthesis of flower-like ZnO with lignin amine and its optical properties.

Miao TT, Sun DX, Guo YR, Li C, Ma YL, Fang GZ, Pan QJ - Nanoscale Res Lett (2013)

Bottom Line: It is found that the morphology of ZnO and its specific surface area are capable of being tuned by varying the added lignin amine amount.Using the optimal 10 mL lignin amine, the synthesized ZnO exhibits flower-like morphology with proper specific surface area.Their intensities were revealed to depend on the added lignin amine amount as well as on the molar ratio of Zn2+/OH-.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Materials Science and Engineering College, Northeast Forestry University, Harbin 150040, China. guoyrnefu@163.com.

ABSTRACT
A facile precipitation method has been developed to synthesize ZnO with [bis(2-aminoethyl)amino]methyl lignin (lignin amine) that is chemically modified from low-cost pulp industrial lignin. The obtained ZnO crystallites have been characterized to exhibit a hexagonal wurtzite structure, and their sizes have been determined at ca. 24 nm (mean value). These ZnO nanocrystallites are of high purity and well crystallized. Our present synthetic approach apparently exempts the commonly used calcining purification procedure. It is found that the morphology of ZnO and its specific surface area are capable of being tuned by varying the added lignin amine amount. Using the optimal 10 mL lignin amine, the synthesized ZnO exhibits flower-like morphology with proper specific surface area. Additionally, photoluminescence property of the obtainable ZnO displays two emissive bands at 383 nm (sharp) and in the range of 480 to 600 nm (broad) at room temperature. Their intensities were revealed to depend on the added lignin amine amount as well as on the molar ratio of Zn2+/OH-. The present investigation demonstrates that our method is simple, eco-friendly, and cost-effective for the synthesis of small-size ZnO materials.

No MeSH data available.


SEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.
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Figure 5: SEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.

Mentions: As the base concentration can affect the morphology of ZnO crystallites, the SEM images of the ZnO prepared with 10 mL lignin amine at various molar ratios of Zn2+/OH- were obtained and are shown in Figure 5. As shown in Figure 5a, nanoparticles with diameters of 50 to 100 nm were determined when Zn2+/OH- is 1:2. The obtainable flowers do not grow well. This implies that there is no obvious preferential growth direction of ZnO in this condition. When the molar ratio of Zn2+/OH- is 1:4, the preferential growth along the c-axis direction forms multi-needle flowers, which agrees well with the above XRD results. Continuously increasing the base concentration (Zn2+/OH- of 1:6, 1:8, to 1:10, Figure 5b,c,d), all the prepared ZnO nanomaterials feature the morphology of the slices. That is because in the condition of high base concentration, the upper side of the needle-like ZnO will be slowly dissolved during the growth, eventually forming ZnO slices.


Low-temperature precipitation synthesis of flower-like ZnO with lignin amine and its optical properties.

Miao TT, Sun DX, Guo YR, Li C, Ma YL, Fang GZ, Pan QJ - Nanoscale Res Lett (2013)

SEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.
© Copyright Policy - open-access
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4016318&req=5

Figure 5: SEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.
Mentions: As the base concentration can affect the morphology of ZnO crystallites, the SEM images of the ZnO prepared with 10 mL lignin amine at various molar ratios of Zn2+/OH- were obtained and are shown in Figure 5. As shown in Figure 5a, nanoparticles with diameters of 50 to 100 nm were determined when Zn2+/OH- is 1:2. The obtainable flowers do not grow well. This implies that there is no obvious preferential growth direction of ZnO in this condition. When the molar ratio of Zn2+/OH- is 1:4, the preferential growth along the c-axis direction forms multi-needle flowers, which agrees well with the above XRD results. Continuously increasing the base concentration (Zn2+/OH- of 1:6, 1:8, to 1:10, Figure 5b,c,d), all the prepared ZnO nanomaterials feature the morphology of the slices. That is because in the condition of high base concentration, the upper side of the needle-like ZnO will be slowly dissolved during the growth, eventually forming ZnO slices.

Bottom Line: It is found that the morphology of ZnO and its specific surface area are capable of being tuned by varying the added lignin amine amount.Using the optimal 10 mL lignin amine, the synthesized ZnO exhibits flower-like morphology with proper specific surface area.Their intensities were revealed to depend on the added lignin amine amount as well as on the molar ratio of Zn2+/OH-.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Materials Science and Engineering College, Northeast Forestry University, Harbin 150040, China. guoyrnefu@163.com.

ABSTRACT
A facile precipitation method has been developed to synthesize ZnO with [bis(2-aminoethyl)amino]methyl lignin (lignin amine) that is chemically modified from low-cost pulp industrial lignin. The obtained ZnO crystallites have been characterized to exhibit a hexagonal wurtzite structure, and their sizes have been determined at ca. 24 nm (mean value). These ZnO nanocrystallites are of high purity and well crystallized. Our present synthetic approach apparently exempts the commonly used calcining purification procedure. It is found that the morphology of ZnO and its specific surface area are capable of being tuned by varying the added lignin amine amount. Using the optimal 10 mL lignin amine, the synthesized ZnO exhibits flower-like morphology with proper specific surface area. Additionally, photoluminescence property of the obtainable ZnO displays two emissive bands at 383 nm (sharp) and in the range of 480 to 600 nm (broad) at room temperature. Their intensities were revealed to depend on the added lignin amine amount as well as on the molar ratio of Zn2+/OH-. The present investigation demonstrates that our method is simple, eco-friendly, and cost-effective for the synthesis of small-size ZnO materials.

No MeSH data available.