Construction of Hierarchical α-MoO3 Hollow Microspheres and Its High Adsorption Performance towards Organic Dyes

Li-Li SUI; Run WANG; Dan ZHAO; Shu-Chang SHEN; Li SUN; Ying-Ming XU; Xiao-Li CHENG; Li-Hua HUO; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]

doi:10.15541/jim20180132

Journals >Journal of Inorganic Materials >Volume 34 >Issue 2 >Page 193 > Article

Journal of Inorganic Materials
Vol. 34, Issue 2, 193 (2019)

Construction of Hierarchical α-MoO₃ Hollow Microspheres and Its High Adsorption Performance towards Organic Dyes

Li-Li SUI¹, Run WANG¹, Dan ZHAO², Shu-Chang SHEN¹, Li SUN¹, Ying-Ming XU², Xiao-Li CHENG², Li-Hua HUO², [in Chinese]¹, [in Chinese]¹, [in Chinese]², [in Chinese]¹, [in Chinese]¹, [in Chinese]², [in Chinese]², and [in Chinese]²

Author Affiliations

¹1. School of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China

²2. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China

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DOI: 10.15541/jim20180132 Cite this Article

Li-Li SUI, Run WANG, Dan ZHAO, Shu-Chang SHEN, Li SUN, Ying-Ming XU, Xiao-Li CHENG, Li-Hua HUO, [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Construction of Hierarchical α-MoO₃ Hollow Microspheres and Its High Adsorption Performance towards Organic Dyes[J]. Journal of Inorganic Materials, 2019, 34(2): 193 Copy Citation Text

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. XRD patterns of the precursor (a) and the product calcined at 400 ℃ in air for 2 h (b)

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. FT-IR spectrum of the product calcined at 400 ℃ in air for 2 h

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. Typical SEM images of precursor (a, b) and α-MoO₃ microspheres (c)

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. Typical TEM (a, b), HRTEM (c) images and SAED pattern (inset in (c)) of α-MoO₃ hollow microspheres

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. Nitrogen adsorption-desorption isotherms and pore size distribution plot (inset) of α-MoO₃ hollow microspheres

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. Effect of adsorbent dosage (a) and concentration of MB (b) on the adsorption performances of α-MoO₃ hollow microspheres, UV-Vis spectra (c) and removal percentage curves (d) of α-MoO₃ to MB for different contact times

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. Pseudo-first-order (a) and pseudo-second-order (b) sorption kinetics for different concentrations of MB onto α-MoO₃ hollow microspheres

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. Langmuir (a) and Freundlich (b) adsorption isotherm curves for adsorption of MB by α-MoO₃ hollow microspheres

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. Zeta potential of α-MoO₃ hollow microspheres at different pH

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C₀/(mg·L^-1)	q_e._exp/(mg·g^-1)	Pseudo-second-order			Pseudo-first-order
C₀/(mg·L^-1)	q_e._exp/(mg·g^-1)	q_e._cal/(mg·g^-1)	k₂/(×10^-3, g·mg^-1·min^-1)	R²	q_e._cal/(mg·g^-1)	k₁/(×10^-3, min^-1)	R²
10	19.97	20.83	4.10	0.9996	6.98	10.13	0.6385
20	39.86	40.16	10.90	0.9999	5.34	20.45	0.8994
30	58.16	59.85	0.63	0.9907	44.67	13.04	0.9456
40	65.22	65.10	0.82	0.9903	36.89	9.30	0.9308

Table 1. Kinetic parameters for adsorption of MB on the samples of α-MoO₃ hollow microspheres

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Adsorption	Langmuir model				Freundlich model
Adsorption	q_m/(mg·g^-1)	K_L/(L·mg^-1)	R_L	R²	K_F/(L·g^-1)	n	R²
MB	1543.2	1.19	0.0014	0.9978	724.44	1.82	0.9035

Table 2. Adsorption isotherm parameters of α-MoO₃ hollow microspheres to MB

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Adsorbent	Maximum adsorption capacity, q_m/(mg·g^-1)	Ref.
Hierarchical α-MoO₃ hollow microspheres	1543.2	This work
WO₃ nanotube	75.0	[26]
WO₃ nanorods	73.0	[27]
WO₃ hollow spheres	138.9	[28]
Hierarchical WO₃ hydrates	274.3	[8]
SiO₂ nanoparticles	679.9	[29]
Fe₃O₄@Ag/SiO₂ nanospheres	128.5	[30]

Table 3. Comparison of the maximum adsorption capacities for MB on adsorbents of different metal oxides

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