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Author:

Shang, Yaxin (Shang, Yaxin.) | Xu, Qing (Xu, Qing.) | Gao, Zhixiao (Gao, Zhixiao.) | Li, Beibei (Li, Beibei.) | Yang, Jingsu (Yang, Jingsu.) | Wang, Yifei (Wang, Yifei.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars:彭永臻)

Indexed by:

EI Scopus SCIE

Abstract:

Developing metal-organic framework-incorporated carbon heterostructure (MOF@C) adsorbents with advanced phosphate removal capability is of remarkable significance in satisfying the increasingly stringent wastewater discharge criteria. Nevertheless, the tailored synthesis of MOF@C architectures and related structureperformance modulation remains elusive to date. Herein, we report on the dimensional engineering of MOF@C to prepare ZIF8@single-walled carbon nanotube (SCNT) and ZIF8@reduced graphene oxide (rGO) heterostructures with satisfactory phosphate removal efficiency. The maximum phosphate adsorption capacity of ZIF8@rGO is 491.2 mg g(-1), with the largest partition coefficient value of 1900 mg g(-1) mu M-1 and an initial concentration of 2 mg L-1 under a neutral condition; thus, the prepared heterostructures evidently surpass stateof-the-art adsorbents. The high adsorption capacity is attributable to the two-dimensional graphene support, which provides a more effective surface area for ZIF8 anchoring than that of one-dimensional CNT. Furthermore, phosphate removal on these dimension-engineered MOF@C is examined as a function of pH, system temperature, and coexisting anions. The underlying mechanism is further elucidated via X-ray photoelectron spectroscopy/Xray diffraction analysis and density functional theoretical simulation; enhanced phosphate removal by ZIF8@rGO is mainly attributable to the ligand exchange between the phosphates and the adsorbent. Our findings can aid the design of multifunctional MOF@C adsorbents for efficient phosphate removal from contaminated waterbodies.

Keyword:

Adsorption heterostructure Ligand exchange Phosphate removal Metal-organic framework-incorporated carbon

Author Community:

  • [ 1 ] [Shang, Yaxin]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 2 ] [Xu, Qing]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Beibei]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 4 ] [Yang, Jingsu]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Yifei]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 6 ] [Peng, Yongzhen]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 7 ] [Gao, Zhixiao]China Univ Petr East China, Sch Mat Sci & Engn, Qingdao 266580, Peoples R China

Reprint Author's Address:

  • [Wang, Yifei]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China

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Source :

CHEMICAL ENGINEERING JOURNAL

ISSN: 1385-8947

Year: 2022

Volume: 428

1 5 . 1

JCR@2022

1 5 . 1 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:49

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 50

SCOPUS Cited Count: 52

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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