Adsorption-degradation synergetic effects on removal of methylene blue over heterostructured TiO2/Co4S4.23Se 3.77 composites

Jian Yu; Wan Feng Lin; Le Hui Leng; Shao Kui Bao; Jian Ping Zou; Xu Biao Luo; De Zhi Chen; Sheng Lian Luo; Chak Tong Au

doi:10.1016/j.molcata.2014.07.012

Adsorption-degradation synergetic effects on removal of methylene blue over heterostructured TiO₂/Co₄S_4.23Se _3.77 composites

Jian Yu, Wan Feng Lin, Le Hui Leng, Shao Kui Bao, Jian Ping Zou^*, Xu Biao Luo, De Zhi Chen, Sheng Lian Luo, Chak Tong Au

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

14 Citations (Scopus)

Abstract

Novel heterostructured TiO₂/Co₄S _4.23Se_3.77 composites were synthesized by a combination of solid-state and sol-gel methods, and were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and photocurrent measurements. The results of photocatalytic degradation of methylene blue over the as-prepared materials indicate that photocatalytic efficiency is closely related to the composition of the materials, and the 30%TiO₂/Co₄S_4.23Se_3.77 catalyst exhibits the best adsorption and photodegradation efficiency under sunlight or visible-light irradiation. The adsorption capacity of 30%TiO₂/Co ₄S_4.23Se_3.77 for methylene blue is 18.59 mg/g calculated based on the Langmuir adsorption model. Adsorption kinetics studies show that the process fits well with a pseudo-second-order rate mechanism. Recycle experiments confirm that the 30%TiO₂/Co₄S _4.23Se_3.77 catalyst is stable. The present work illustrates a new way for the design and syntheses of stable and high-efficiency catalysts applicable for the degradation of organic pollutants.

Original language	English
Pages (from-to)	121-128
Number of pages	8
Journal	Journal of Molecular Catalysis A: Chemical
Volume	394
DOIs	https://doi.org/10.1016/j.molcata.2014.07.012
Publication status	Published - 15 Nov 2014

Scopus Subject Areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

User-Defined Keywords

Adsorption-degradation
Heterostructured
Photocatalysis
Solid solution
Synthetic methods

Access to Document

10.1016/j.molcata.2014.07.012

Cite this

@article{774d08c35e784046bf59644c657b5586,

title = "Adsorption-degradation synergetic effects on removal of methylene blue over heterostructured TiO2/Co4S4.23Se 3.77 composites",

abstract = "Novel heterostructured TiO2/Co4S 4.23Se3.77 composites were synthesized by a combination of solid-state and sol-gel methods, and were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and photocurrent measurements. The results of photocatalytic degradation of methylene blue over the as-prepared materials indicate that photocatalytic efficiency is closely related to the composition of the materials, and the 30%TiO2/Co4S4.23Se3.77 catalyst exhibits the best adsorption and photodegradation efficiency under sunlight or visible-light irradiation. The adsorption capacity of 30%TiO2/Co 4S4.23Se3.77 for methylene blue is 18.59 mg/g calculated based on the Langmuir adsorption model. Adsorption kinetics studies show that the process fits well with a pseudo-second-order rate mechanism. Recycle experiments confirm that the 30%TiO2/Co4S 4.23Se3.77 catalyst is stable. The present work illustrates a new way for the design and syntheses of stable and high-efficiency catalysts applicable for the degradation of organic pollutants.",

keywords = "Adsorption-degradation, Heterostructured, Photocatalysis, Solid solution, Synthetic methods",

author = "Jian Yu and Lin, {Wan Feng} and Leng, {Le Hui} and Bao, {Shao Kui} and Zou, {Jian Ping} and Luo, {Xu Biao} and Chen, {De Zhi} and Luo, {Sheng Lian} and Au, {Chak Tong}",

note = "Funding Information: We gratefully acknowledge the financial supports of the NSF of China ( 51238002 , 51272099 , 51378246 , and 20801026 ), the NSF of Jiangxi Province ( KJLD12002 , 20133ACB21001 , 20122BCB23013 , and 20114BAB203005 ), and the Foundation of State Key Laboratory of Structural Chemistry ( 20100015 ). ",

year = "2014",

month = nov,

day = "15",

doi = "10.1016/j.molcata.2014.07.012",

language = "English",

volume = "394",

pages = "121--128",

journal = "Journal of Molecular Catalysis A: Chemical",

issn = "1381-1169",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Adsorption-degradation synergetic effects on removal of methylene blue over heterostructured TiO2/Co4S4.23Se 3.77 composites

AU - Yu, Jian

AU - Lin, Wan Feng

AU - Leng, Le Hui

AU - Bao, Shao Kui

AU - Zou, Jian Ping

AU - Luo, Xu Biao

AU - Chen, De Zhi

AU - Luo, Sheng Lian

AU - Au, Chak Tong

N1 - Funding Information: We gratefully acknowledge the financial supports of the NSF of China ( 51238002 , 51272099 , 51378246 , and 20801026 ), the NSF of Jiangxi Province ( KJLD12002 , 20133ACB21001 , 20122BCB23013 , and 20114BAB203005 ), and the Foundation of State Key Laboratory of Structural Chemistry ( 20100015 ).

PY - 2014/11/15

Y1 - 2014/11/15

N2 - Novel heterostructured TiO2/Co4S 4.23Se3.77 composites were synthesized by a combination of solid-state and sol-gel methods, and were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and photocurrent measurements. The results of photocatalytic degradation of methylene blue over the as-prepared materials indicate that photocatalytic efficiency is closely related to the composition of the materials, and the 30%TiO2/Co4S4.23Se3.77 catalyst exhibits the best adsorption and photodegradation efficiency under sunlight or visible-light irradiation. The adsorption capacity of 30%TiO2/Co 4S4.23Se3.77 for methylene blue is 18.59 mg/g calculated based on the Langmuir adsorption model. Adsorption kinetics studies show that the process fits well with a pseudo-second-order rate mechanism. Recycle experiments confirm that the 30%TiO2/Co4S 4.23Se3.77 catalyst is stable. The present work illustrates a new way for the design and syntheses of stable and high-efficiency catalysts applicable for the degradation of organic pollutants.

AB - Novel heterostructured TiO2/Co4S 4.23Se3.77 composites were synthesized by a combination of solid-state and sol-gel methods, and were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and photocurrent measurements. The results of photocatalytic degradation of methylene blue over the as-prepared materials indicate that photocatalytic efficiency is closely related to the composition of the materials, and the 30%TiO2/Co4S4.23Se3.77 catalyst exhibits the best adsorption and photodegradation efficiency under sunlight or visible-light irradiation. The adsorption capacity of 30%TiO2/Co 4S4.23Se3.77 for methylene blue is 18.59 mg/g calculated based on the Langmuir adsorption model. Adsorption kinetics studies show that the process fits well with a pseudo-second-order rate mechanism. Recycle experiments confirm that the 30%TiO2/Co4S 4.23Se3.77 catalyst is stable. The present work illustrates a new way for the design and syntheses of stable and high-efficiency catalysts applicable for the degradation of organic pollutants.

KW - Adsorption-degradation

KW - Heterostructured

KW - Photocatalysis

KW - Solid solution

KW - Synthetic methods

UR - http://www.scopus.com/inward/record.url?scp=84905000897&partnerID=8YFLogxK

U2 - 10.1016/j.molcata.2014.07.012

DO - 10.1016/j.molcata.2014.07.012

M3 - Journal article

AN - SCOPUS:84905000897

SN - 1381-1169

VL - 394

SP - 121

EP - 128

JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

ER -