E-resources
Peer reviewed
-
Choe, Yun Jeong; Lee, Seokhyun; Kim, Minsung; Kim, Sang Hoon; Choi, In-Suk; Jeong, Keunhong; Kim, Jongsik
Separation and purification technology, 04/2023, Volume: 310Journal Article
Display omitted •▪ ZrO2-N bears Lewis acidic Zr4+, Brönsted acidic -OH, and mono-dentate NO3− (NO3-SUP).•▪ NO3-SUP elevates acidic strengths of Zr4+/-OH to lower energy barrier of OH desorption for OH → NO3SUP.•▪ ZrO2 and ZrO2-N primarily use OH and NO3SUP in degrading pollutants, respectively.•▪ ZrO2-N enhances efficiency/recyclability over ZrO2 in aromatic degradation with poison accumulation evaded.•▪ ZrO2-N outperforms α-MnO2-N in recycling textile wastewater mineralization with minute Zr leaching. To advance aqueous pollutant degradation using OH, H2O2 (OH carrier) should be cleaved homolytically on a non-reducible metal oxide (ZrO2) rather than heterolytically on a reducible counterpart (MnO2), given the merits of H2O2 homolysis such as improved OH productivity, unnecessity to recover H2O2 activators (Lewis acidic metals; LA) via electron reduction, and minute LA leaching. This paper presents a methodology to exploit H2O2 homolysis with the rate-determining step of endothermic OH desorption, thereby proposing the coupling of H2O2 homolysis and exothermic radical inter-conversion of OH → NO3SUP (supported NO3) to create the overall OH → NO3SUP route. ZrO2 was modified with NO3− functionalities (NO3SUP precursors) to form ZrO2-N, where NO3-SUP species were located close to Zr4+ (LA) and Brönsted acidic -OH (BA) sites, whose acidic strengths must be elevated to facilitate OH desorption for reducing the energy barrier (EBARRIER) of the overall OH → NO3SUP route. NO3-SUP species were bound to the ZrO2 surface via mono-dentate configuration only, thereby avoiding LA loss (rate in a per-gram↑), escalating LA/BA strengths (EBARRIER↓), and imparting two free oxygens available to OH → NO3SUP (rate in a per-site↑). Moreover, NO3SUP species extract electrons from contaminants via electron transfer to recover NO3-SUP species used for recurring OH → NO3SUP, while sustaining pollutant fragmentation efficiency by circumventing surface poison accumulation. Hence, NO3SUP on ZrO2-N revealed higher efficiencies in fragmenting bisphenol A or recycling phenol degradation than OH evolved from ZrO2. In addition, ZrO2 outperformed MnO2 in exploiting NO3SUP species, thus showing greater recyclability in mineralizing textile wastewater, while leaching a negligible amount of Zr.
Author
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.