Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag3PO4 or Ag6Si2O7 in wastewater treatment and disinfection: Effects and mechanisms

Tongtong Wang; Florian J. Stadler; Dalal Z. Husein; Di Zhang; Jinjun Cai; Yifan Wang; Minghao Li; Yin Qiang; Jiyong Zheng

doi:10.1016/j.colsurfa.2022.130235

Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag₃PO₄ or Ag₆Si₂O₇ in wastewater treatment and disinfection: Effects and mechanisms

Tongtong Wang
, Florian J. Stadler
, Dalal Z. Husein
, Di Zhang
, Jinjun Cai
, Yifan Wang
, Minghao Li
, Yin Qiang
, Jiyong Zheng^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

To efficiently remove organic pollutants from wastewater combined with a disinfection effect, using activated biochar (ACB) as substrate, ACB-Ag₃PO₄ and ACB-Ag₆Si₂O₇ composite photocatalysts were prepared via the in-situ co-precipitation method. The structure, morphology, physicochemical, and optical properties were characterized by advanced techniques, and the adsorption-photodegradation effects on tetracycline (TC), chloramphenicol (CAP), and rhodamine B (RhB) were investigated. The results revealed that ACB-Ag₃PO₄ and ACB-Ag₆Si₂O₇ with heterojunction were successfully synthesized, and their optimum loading ratios were 1:1 and 1:2, respectively. The removal rates of ACB-Ag₃PO₄ and ACB-Ag₆Si₂O₇ for TC were 98.48% and 91.87%, 95.88% and 85.23% for CAP, 99.13% and 83.54% for RhB, respectively, and also much higher than those of pure Ag₃PO₄ and Ag₆Si₂O₇. Moreover, the degradation efficiency and mineralization rate of ACB-Ag₃PO₄ were higher than those of ACB-Ag₆Si₂O₇ for all pollutants. Further, both composites maintained about a 99% sterilization rate against both S. aureus and E. coli at 48 h. These were attributed to the introduction of ACB, which enriched the elemental composition of Ag-based semiconductors and increased the specific surface area and visible light absorption. Importantly, the composites narrow the bandgap energy and optimize energy band structure, and the special structure of ACB facilitated the photocatalytic activity. Moreover, possible photogenerated carrier transfer paths of the two composites are either type-II or Z-scheme, and the performance differences are related to the photogenerated carriers, absorbance, and microstructure. ACB-Ag₃PO₄ is more recommended for environmental applications given its better photostability and reusability than ACB-Ag₆Si₂O₇, and its removal of TC and RhB from actual wastewater exceeded 61.39% and 86.62%, respectively.

Original language	English
Article number	130235
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	655
DOIs	https://doi.org/10.1016/j.colsurfa.2022.130235
State	Published - 20 Dec 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 7 Affordable and Clean Energy

Keywords

Activated biochar
AgPO and AgSiO
Disinfection
Mechanisms
Performance differences

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

Access to Document

10.1016/j.colsurfa.2022.130235

Cite this

Wang, T., Stadler, F. J., Husein, D. Z., Zhang, D., Cai, J., Wang, Y., Li, M., Qiang, Y., & Zheng, J. (2022). Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag₃PO₄ or Ag₆Si₂O₇ in wastewater treatment and disinfection: Effects and mechanisms. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 655, Article 130235. https://doi.org/10.1016/j.colsurfa.2022.130235

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title = "Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag3PO4 or Ag6Si2O7 in wastewater treatment and disinfection: Effects and mechanisms",

abstract = "To efficiently remove organic pollutants from wastewater combined with a disinfection effect, using activated biochar (ACB) as substrate, ACB-Ag3PO4 and ACB-Ag6Si2O7 composite photocatalysts were prepared via the in-situ co-precipitation method. The structure, morphology, physicochemical, and optical properties were characterized by advanced techniques, and the adsorption-photodegradation effects on tetracycline (TC), chloramphenicol (CAP), and rhodamine B (RhB) were investigated. The results revealed that ACB-Ag3PO4 and ACB-Ag6Si2O7 with heterojunction were successfully synthesized, and their optimum loading ratios were 1:1 and 1:2, respectively. The removal rates of ACB-Ag3PO4 and ACB-Ag6Si2O7 for TC were 98.48\% and 91.87\%, 95.88\% and 85.23\% for CAP, 99.13\% and 83.54\% for RhB, respectively, and also much higher than those of pure Ag3PO4 and Ag6Si2O7. Moreover, the degradation efficiency and mineralization rate of ACB-Ag3PO4 were higher than those of ACB-Ag6Si2O7 for all pollutants. Further, both composites maintained about a 99\% sterilization rate against both S. aureus and E. coli at 48 h. These were attributed to the introduction of ACB, which enriched the elemental composition of Ag-based semiconductors and increased the specific surface area and visible light absorption. Importantly, the composites narrow the bandgap energy and optimize energy band structure, and the special structure of ACB facilitated the photocatalytic activity. Moreover, possible photogenerated carrier transfer paths of the two composites are either type-II or Z-scheme, and the performance differences are related to the photogenerated carriers, absorbance, and microstructure. ACB-Ag3PO4 is more recommended for environmental applications given its better photostability and reusability than ACB-Ag6Si2O7, and its removal of TC and RhB from actual wastewater exceeded 61.39\% and 86.62\%, respectively.",

keywords = "Activated biochar, AgPO and AgSiO, Disinfection, Mechanisms, Performance differences",

author = "Tongtong Wang and Stadler, \{Florian J.\} and Husein, \{Dalal Z.\} and Di Zhang and Jinjun Cai and Yifan Wang and Minghao Li and Yin Qiang and Jiyong Zheng",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = dec,

day = "20",

doi = "10.1016/j.colsurfa.2022.130235",

language = "English",

volume = "655",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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Wang, T, Stadler, FJ, Husein, DZ, Zhang, D, Cai, J, Wang, Y, Li, M, Qiang, Y & Zheng, J 2022, 'Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag₃PO₄ or Ag₆Si₂O₇ in wastewater treatment and disinfection: Effects and mechanisms', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 655, 130235. https://doi.org/10.1016/j.colsurfa.2022.130235

Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag₃PO₄ or Ag₆Si₂O₇ in wastewater treatment and disinfection: Effects and mechanisms. / Wang, Tongtong; Stadler, Florian J.; Husein, Dalal Z. et al.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 655, 130235, 20.12.2022.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag3PO4 or Ag6Si2O7 in wastewater treatment and disinfection

T2 - Effects and mechanisms

AU - Wang, Tongtong

AU - Stadler, Florian J.

AU - Husein, Dalal Z.

AU - Zhang, Di

AU - Cai, Jinjun

AU - Wang, Yifan

AU - Li, Minghao

AU - Qiang, Yin

AU - Zheng, Jiyong

PY - 2022/12/20

Y1 - 2022/12/20

N2 - To efficiently remove organic pollutants from wastewater combined with a disinfection effect, using activated biochar (ACB) as substrate, ACB-Ag3PO4 and ACB-Ag6Si2O7 composite photocatalysts were prepared via the in-situ co-precipitation method. The structure, morphology, physicochemical, and optical properties were characterized by advanced techniques, and the adsorption-photodegradation effects on tetracycline (TC), chloramphenicol (CAP), and rhodamine B (RhB) were investigated. The results revealed that ACB-Ag3PO4 and ACB-Ag6Si2O7 with heterojunction were successfully synthesized, and their optimum loading ratios were 1:1 and 1:2, respectively. The removal rates of ACB-Ag3PO4 and ACB-Ag6Si2O7 for TC were 98.48% and 91.87%, 95.88% and 85.23% for CAP, 99.13% and 83.54% for RhB, respectively, and also much higher than those of pure Ag3PO4 and Ag6Si2O7. Moreover, the degradation efficiency and mineralization rate of ACB-Ag3PO4 were higher than those of ACB-Ag6Si2O7 for all pollutants. Further, both composites maintained about a 99% sterilization rate against both S. aureus and E. coli at 48 h. These were attributed to the introduction of ACB, which enriched the elemental composition of Ag-based semiconductors and increased the specific surface area and visible light absorption. Importantly, the composites narrow the bandgap energy and optimize energy band structure, and the special structure of ACB facilitated the photocatalytic activity. Moreover, possible photogenerated carrier transfer paths of the two composites are either type-II or Z-scheme, and the performance differences are related to the photogenerated carriers, absorbance, and microstructure. ACB-Ag3PO4 is more recommended for environmental applications given its better photostability and reusability than ACB-Ag6Si2O7, and its removal of TC and RhB from actual wastewater exceeded 61.39% and 86.62%, respectively.

AB - To efficiently remove organic pollutants from wastewater combined with a disinfection effect, using activated biochar (ACB) as substrate, ACB-Ag3PO4 and ACB-Ag6Si2O7 composite photocatalysts were prepared via the in-situ co-precipitation method. The structure, morphology, physicochemical, and optical properties were characterized by advanced techniques, and the adsorption-photodegradation effects on tetracycline (TC), chloramphenicol (CAP), and rhodamine B (RhB) were investigated. The results revealed that ACB-Ag3PO4 and ACB-Ag6Si2O7 with heterojunction were successfully synthesized, and their optimum loading ratios were 1:1 and 1:2, respectively. The removal rates of ACB-Ag3PO4 and ACB-Ag6Si2O7 for TC were 98.48% and 91.87%, 95.88% and 85.23% for CAP, 99.13% and 83.54% for RhB, respectively, and also much higher than those of pure Ag3PO4 and Ag6Si2O7. Moreover, the degradation efficiency and mineralization rate of ACB-Ag3PO4 were higher than those of ACB-Ag6Si2O7 for all pollutants. Further, both composites maintained about a 99% sterilization rate against both S. aureus and E. coli at 48 h. These were attributed to the introduction of ACB, which enriched the elemental composition of Ag-based semiconductors and increased the specific surface area and visible light absorption. Importantly, the composites narrow the bandgap energy and optimize energy band structure, and the special structure of ACB facilitated the photocatalytic activity. Moreover, possible photogenerated carrier transfer paths of the two composites are either type-II or Z-scheme, and the performance differences are related to the photogenerated carriers, absorbance, and microstructure. ACB-Ag3PO4 is more recommended for environmental applications given its better photostability and reusability than ACB-Ag6Si2O7, and its removal of TC and RhB from actual wastewater exceeded 61.39% and 86.62%, respectively.

KW - Activated biochar

KW - AgPO and AgSiO

KW - Disinfection

KW - Mechanisms

KW - Performance differences

UR - https://www.scopus.com/pages/publications/85139335509

U2 - 10.1016/j.colsurfa.2022.130235

DO - 10.1016/j.colsurfa.2022.130235

M3 - Article

AN - SCOPUS:85139335509

SN - 0927-7757

VL - 655

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

M1 - 130235

ER -

Wang T, Stadler FJ, Husein DZ, Zhang D, Cai J, Wang Y et al. Comparative study of enhanced adsorption-photodegradation activity using activated biochar composited with Ag₃PO₄ or Ag₆Si₂O₇ in wastewater treatment and disinfection: Effects and mechanisms. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2022 Dec 20;655:130235. doi: 10.1016/j.colsurfa.2022.130235