Improved photocatalytic degradation of organic dye using Ag3PO4/MoS2 nanocomposite

doi:10.1007/s11706-017-0404-x

Frontiers of Materials Science

2017, Vol. 11

Issue (4): 366-374 https://doi.org/10.1007/s11706-017-0404-x

本期目录

Improved photocatalytic degradation of organic dye using Ag₃PO₄/MoS₂ nanocomposite

Madhulika SHARMA¹, Pranab Kishore MOHAPATRA², Dhirendra BAHADUR¹(

)

¹. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
². Department of Physics, Indian Institute of Technology, Bombay, Powai Mumbai 400076, India

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Abstract：

Highly efficient Ag₃PO₄/MoS₂ nanocomposite photocatalyst was synthesized using a wet chemical route with a low weight percentage of highly exfoliated MoS₂ (0.1 wt.%) and monodispersed Ag₃PO₄ nanoparticles (~5.4 nm). The structural and optical properties of the nanocomposite were studied using various characterization techniques, such as XRD, TEM, Raman and absorption spectroscopy. The composite exhibits markedly enhanced photocatalytic activity with a low lamp power (60 W). Using this composite, a high kinetic rate constant (k) value of 0.244 min⁻¹ was found. It was observed that ~97.6% of dye degrade over the surface of nanocomposite catalyst within 15 min of illumination. The improved photocatalytic activity of Ag₃PO₄/MoS₂ nanocomposite is attributed to the efficient interfacial charge separation, which was supported by the PL results. Large surface area of MoS₂ nanosheets incorporated with well dispersed Ag₃PO₄ nanoparticles further increases charge separation, contributing to enhanced degradation efficiency. A possible mechanism for charge separation is also discussed.

Key words： Ag₃PO₄/MoS₂ nanocomposite methylene blue degradation efficiency photocatalysis

收稿日期: 2017-09-06 出版日期: 2017-11-29

Corresponding Author(s): Dhirendra BAHADUR

引用本文:

. [J]. Frontiers of Materials Science, 2017, 11(4): 366-374.
Madhulika SHARMA, Pranab Kishore MOHAPATRA, Dhirendra BAHADUR. Improved photocatalytic degradation of organic dye using Ag₃PO₄/MoS₂ nanocomposite. Front. Mater. Sci., 2017, 11(4): 366-374.

链接本文:

https://academic.hep.com.cn/foms/CN/10.1007/s11706-017-0404-x
https://academic.hep.com.cn/foms/CN/Y2017/V11/I4/366

Ref.	Photocatalyst	MoS ₂ content	X_L/X_W	k /min⁻¹	P/W	C_s /mg	C₀ /(mg·L⁻¹)	t_d /min	$δ A g 3 P O 4$ /nm
This work	Ag ₃PO₄/MoS₂	0.1 wt.%	−	0.244	60 ^a)	20	20	15	5.4
[ 20]	3D Ag ₃PO₄/MoS₂	15 wt.%	150	0.133	300 ^b)	25	10	30	30–40
[ 21]	Ag ₃PO₄@MoS₂	3.5 wt.%	35	0.139	800 ^b)	250	2.5	16	−
[ 22]	Ag ₃PO₄/MoS₂	3 wt.%	30	0.142	− ^c)	50	10	30	15000
[ 23]	Ag ₃PO₄/MoS₂	0.648 wt.%	6.5	0.065	35 ^c)	30	20	60	10–20
[ 24]	Ag ₃PO₄/MoS₂	0.5 wt.%	5	0.124	300 ^b)	100	20	8	200–300
[ 25]	MoS ₂/Ag₃PO₄	0.1 wt.%	1	0.095	300 ^b)	75	10	12	30–50
[ 26]	Ag ₃PO₄@MoS₂ QD/FL MoS₂ nanosheet	6 mL MoS ₂	−	0.269	300 ^b)	−	10	16	10.7
[ 27]	Fe ₃O₄@MoS₂/Ag₃PO₄	0.1 g (Fe ₃O₄ MoS₂)	−	0.192	500 ^b)	0.2 ^e)	20	10	30–50
[ 28]	Ag ₃PO₄–0.02(MoS₂/0.005 graphene)	2 wt.% [0.02(MoS ₂/0.005GR)]	−	−	500 ^b)	20	20	60	500
[ 29]	MoS ₂/Ag₃PO₄	1:40 (MoS ₂:Ag₃PO₄)	−	−	150 ^d)	100	20	16	250

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