Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Velu Manikandan,Duraisamy Elango,Velu Subash,Palaniyappan Jayanthi,Mysoon M. Al-Ansari,Saurav Dixit,Subhav Singh,Seemaisamy Revathi,Sutikno Sutikno,Kwang Soup Song
The development of effective and cost-efficient photocatalysts is crucial for wastewater treatment. This study aimed to synthesize and evaluate ZnO/Fe 2 O 3 nanocomposites (ZnFe NCs) as novel photocatalysts for the removal of organic contaminates. We synthesized ZnFe NCs using a simple, environmentally friendly microwave-assisted method. Characterization was conducted using HR-TEM, SEM-EDS, XPS, and X-ray diffraction. The photocatalytic performance was evaluated with methylene blue (MB) and orange II (O-II) dyes, showing that ZnFe NCs with H 2 O 2 achieved 98.2 % dye removal under 120 min of sunlight. This performance surpassed that of controls, including ZnO, Fe 2 O 3 , and ZnO/Fe 2 O 3 alone. The study also determined optimal conditions for the photocatalysts, demonstrating enhanced photocatalytic activity. Antibacterial tests showed inhibition zones of 22 mm against Staphylococcus aureus ( S. aureus ) and 20 mm against Escherichia coli ( E. coli ) at 100 mg/mL. ZnFe NCs show dual potential for photocatalytic degradation and antimicrobial activity, ideal for wastewater treatment and microbial control.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PLoS One
·
2021
·Vol. 16
·期 7
·e0253500
·
IF 3.24
Fuhua Wei,Huan Zhang,Qinhui Ren,Hongliang Chen,Lili Yang,Bo Ding,Mengjie Yu,Zhao Liang
Graphene oxide/metal-organic frameworks (GO/MOFs) have been prepared via solvothermal synthesis with ferrous sulfate heptahydrate, zirconium acetate and terephthalic acid for the purpose of removing organic pollutants from wastewater. The composites were analyzed using scanning electron microscopy, infrared spectrometry, and XRD. Tetracycline hydrochloride and orange II were implemented as model pollutants to evaluate the efficacy of the GO/MOFs in water purification, in which 50 mg of Zr/Fe-MOFs/GO was mixed with 100 mL of 10 mg/L, 20 mg/L, 30 mg/L, or 50 mg/L tetracycline hydrochloride solution and 25 mg/L, 35 mg/L, 45 mg/L, or 60 mg/L orange II solution, respectively. The removal efficacy after 4 hours was determined to be 96.1%, 75.8%, 55.4%, and 30.1%, and 98.8%, 91.9%, 71.1%, and 66.2%, respectively. The kinetics of pollutant removal was investigated for both tetracycline hydrochloride and orange II and excellent correlation coefficients of greater than 0.99 were obtained. The high efficacy of these MOFs in pollutant removal, coupled with their inexpensive preparation indicates the feasibility of their implementation in strategies for treating waste liquid. As such, it is anticipated that Zr/Fe-MOFs/GO composites will be widely applied in wastewater purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 45
·100596-100612
·
IF 5.8
Liu Shuai,Kang Yong,Hua Weijie
It is essential to develop an efficient technology for the elimination of refractory contaminants due to their high toxicity. In this study, a novel underwater bubbling pulsed discharge plasma (UBPDP) system was proposed for the degradation of Orange II (OII). The degradation performance experiments showed that by enhancing the peak voltage and pulse frequency, the degradation efficiency of OII increased gradually. The removal efficiencies under different air flow rates were close. Reducing OII concentration and solution conductivity could promote the elimination of OII. Compared with neutral and alkaline conditions, acidic condition was more beneficial to OII degradation. The active species including ·OH, ·O 2 − , 1 O 2 , and hydrated electrons were all involved in OII degradation. The concentrations of O 3 and H 2 O 2 in OII solution were lower than those in deionized water. During discharge, the solution pH increased while conductivity decreased. The variation of UV–vis spectra with treatment time indicated the effective decomposition of OII. Possible degradation pathways were speculated based on LC-MS. The toxicity of intermediate products was predicted by the Toxicity Estimation Software Tool. Coexisting constituents including Cl − , SO 4 2− , HCO 3 − , and humic acid had a negative effect on OII removal. Finally, the comparison with other technology depicted the advantage of the UBPDP system.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）