Glycine Assisted Synthesis of BiOI and Enhanced Simulated Sunlight Activity

doi:10.15541/jim20160244

Abstract

Abstract:

Tetragonal BiOI with uniform size petal composed microspheres morphology was synthesized by one-step hydrothermal method using glycine molecules as templates and Bismuth nitrate as the source of Bi³⁺. The physicochemical properties of the fabricated BiOI was characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), UV-Vis diffuse reflection spectroscope (UV-Vis/DRS), N₂ adsorption-desorption isothermal. The molar ratios of Bi(NO₃)₃·5H₂O and glycine (Bi: G), and hydrothermal time played important roles in the preparation process, which affected the morphology, structure, and light absorption properties of BiOI. Rhodamine-B and salicylic acid were used as the goal pollutants to evaluate the simulated sunlight catalytic properties of BiOI prepared with or without glycine. The BiOI prepared with Bi: G=1: 2 and hydrothermal time of 12 h exhibited the excellent degradation activity. After 40 min irradiation, Rhodamine-B and salicylic acid degradation rate constant by the glycine assisted synthesis of BiOI reached 0.0232 and 0.0223 min^-1, respectively. However, the photocataytic degradation rate constant of BiOI prepared without glycine was only 0.0111 and 0.0143 min^-1. Compared with BiOI prepared without glycine, the degradation activity improved sharply. The enhanced photocatalytic activity was mainly ascribed to regular morphology and big BET surface area of the BiOI prepared with the addition of glycine.

Key words: Glycine, BiOI, simulated sunlight, Rhodamine-B, salicylic acid

CLC Number:

O643

ZHANG Lei, MA Guo-Qiang, ZHU Sui-Yi, YANG Xia, GENG Zhi, HUO Ming-Xin. Glycine Assisted Synthesis of BiOI and Enhanced Simulated Sunlight Activity[J]. Journal of Inorganic Materials, 2017, 32(2): 148-154.

Figures/Tables 8

Fig. 1 SEM images of the BiOI sample with different molar ratios of Bi(NO3)3·5H2O to glycine(a, b) 1: 0; (c, d) 1: 0.5; (e, f) 1: 2; (g, h) 1: 4

Fig. 2 SEM images of the BiOI samples prepared with different synthesis time(a, b) 0 h; (c, d) 4 h; (e, f) 8 h; (g, h) 12 h

Fig. 3 XRD patterns of BiOI prepared under different conditions(a) Different Bi: G; (b) Different synthesis time

Fig. 4 UV-Vis/DRS patterns of BiOI prepared under different conditions(a) different Bi: G, and (b) different synthesis time, inset is the plots of (αhν)1/2 versus hν

Table 1 Textural parameters of as-prepared samples

Sample	S_BET^a/(m²·g^-1)	PV^b /(cm³·g^-1)	D_p^c/nm
Bi: G=1: 0	52.88	0.065	27.3
Bi: G=1: 2	58.95	0.075	28.1

Fig. 5 Pseudo-first-order kinetics curves of BiOI obtained with different glycine additions in the degradation of (a) RhB and (b) SA

Fig. 6 Pseudo-first-order kinetics curves of BiOI obtained with different synthesis time in the degradation of (a) RhB and (b) SA

Fig. 7 Reuse of BiOI for degradation of SA

References 24

[1]	SERGIO C, LAURA G, ADRIANA L,et al. Wet oxidation of salicylic acid solutions.Environ. Sci. Technol., 2010, 44(22): 8629-8635.
[2]	TIAN M, ADAMAS B, WEN J,et al. Photoelectro chemical oxidation of salicylic acid and salicylaldehyde on titanium dioxide nanotube arrays. Electrochimi.. Acta, 2009, 54(14): 3799-3805.
[3]	LI X, KiKUGAWA N, YE J.Nitrogen-doped lamellar niobic acid with visible light-responsive photocatalytic activity.Adv. Mater., 2008, 20(20): 3816-3819.
[4]	MEROIN D, PIFFERI V, SIRONI B, et al.Block copolymers for the synthesis of pure. Block copolymers for the synthesis of pure and Bi-promoted nano-TiO2 as active photocatalysts.J. Nanopart. Res., 2012, 14: 1086(8): 544.
[5]	WANG WEN-ZHONG, SHANG MENG, YIN WEN-ZONG,et al. Recent progress on the bismuth containing complex oxide photocatalysts.Journal of Inorganic Materials, 2012, 27(1): 11-18.
[6]	SANG HUAN-XIN, TIAN YE, WANG XI-TAO,et al. Photocatalytic H2 evolution from glycerol solution over Bi3+-doped TiO2 nanoparticles.Journal of Inorganic Materials, 2012, 27(12): 1283-1288.
[7]	TAO Y, CAO N, PAN J,et al. Controllable synthesis of TiO2 nanomaterials by assisting with lcysteine and ethylenediamine.J. Membr. Sci., 2014, 49(2): 897-904.
[8]	SHI S, WANG X H, GUO G,et al. Preparation and characterization of microporous poly(D, L-lactic acid) film for tissue engineering scaffold.Int. J. Nano, 2010, 5(1): 1049-1055.
[9]	CHEN X, LI H L, WANG S M,et al. Biomolecule-assisted hydrothermal synthesis of molybdenum disulfide microspheres with nanorods.Materials Letters, 2012, 66: 22-24.
[10]	YU S H, HE Z, ZHU J.Amino acids controlled growth of shuttle-like scrolled tellurium nanotubes and nanowires with sharp tips.Chem. Mater. , 2005, 17(11): 152-160.
[11]	ZUO F, YAN S, ZHANG B,et al. L-Cysteine assisted synthesis of PbS Nanocube- based pagoda-like hierarchical architectures.J.Phys.Chem.C, 2008, 112(8): 2831-2835.
[12]	WANG S G, SHEN C B, LONG K,et al. The electrochemical corrosion of bulk nanocrystalline ingotiron in acidic sulfate solution.J. Phys. Chem. B, 2006, 110(1): 377-382.
[13]	ZHAO Z Y, DAI W W.Structural, electronic, and optical properties of Eu-doped BiOX (X = F, Cl, Br, I): A DFT plus U study. Inorg. Chem., 2014, 53(24): 13001-13011.
[14]	ZHANG X, AI Z, FALONG J A,et al. Generalized one-pot synthesis, characterization, and photocatalytic activity of hierarchical BiOX (X = Cl, Br, I) nanoplate microspheres.J. Phys. Chem.C, 2008, 112(3): 747-753.
[15]	WANG J, YU Y, ZHANG L. Highly efficient photocatalytic removal of sodium pentachlorophenate with Bi3O4Br under visible light.Appl. Phys. B. Environ., 2013, 136-137(21): 112-121.
[16]	WANG W, HUANG F, LIN X,et al. Visible-light-responsive photocatalysts xBiOBr-(1-x) BiOI.Catal. Commun., 2008, 9(1): 8-12.
[17]	WANG T M, AN H Z, DU Y,et al. Photocatalytic properties of BiOX (X = Cl, Br, and I).Rare Metals, 2008, 27(3): 243-250.
[18]	ZHANG X, AI Z, JIA F A,et al. Generalized one-pot synthesis, characterization, and photocatalytic activity of hierarchical BiOX (X = Cl, Br, I) nanoplate microspheres.J. Phys. Chem.C, 2008, 112(3): 747-753.
[19]	WANG X F, DUAN F, CHEN M Q.Highly exposed surface area of {001} facets dominated BiOBr nanosheets with enhanced visible light photocatalytic activity.Appl. Chem. Ind. 2016, 14: 1671-1680.
[20]	TAO Y G, XU Y Q, PAN J, et al. Glycine assisted synthesis of flower-like TiO2 hierarchical spheres and its application in photocatalysis.Mater. Sci. Eng.B, 2012, 177(18): 1664-1671.
[21]	KIJIMA N, MATANO K, SAITO M,et al. Oxidative catalytic cracking of n-butane to lower alkenes over layered BiOCl catalyst.Appl. Catal., A, 2001, 206(2): 237-244.
[22]	DAI G, YU J, LIU G.Synthesis and enhanced visible-light photoelectrocatalytic activity of p-n junction BiOI/TiO2 nanotube arrays. J. Phys. Chem.C, 2011, 115(15): 7339-7346.
[23]	ZHANG W, ZHANG Q, DONG F.Visible-light photocatalytic removal of NO in air over BiOX (X = Cl, Br, I) single-crystal nanoplates prepared at room temperature.Ind. Eng. Chem. Res., 2013, 52(20): 6740-6746.
[24]	LONG B, HUANG Y C, LI H B.Carbon dots sensitized BiOI with dominant {001} facets for superior photocatalytic performance.Ind. Eng. Chem. Res., 2015, 54(51): 12788-12795.