OZONE-SCIENCE & ENGINEERING
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2025
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IF 1.4
Zhibo Liu,Jing Zhang,Jingcheng Wei,Bingyan Zhu,Tingfeng Xue,Xiaofu Li,Liwei Pan
To address the challenges posed by highly toxic and recalcitrant compounds in phenol-containing wastewater, a novel CoAl2O4/γ-Al2O3 catalyst was synthesized via an impregnation-calcination method and applied for catalytic ozonation of phenolic wastewater. The catalyst was thoroughly characterized using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma (ICP) analysis. The catalyst’s abundant Lewis acid sites act as active centers, promoting the decomposition of ozone into reactive oxygen species. This study elucidates the pathways by which the CoAl2O4/γ-Al2O3 catalyst synergistically activates O3 to generate O2·−, ·OH, and 1O2, revealing that phenol mineralization primarily proceeds through ·OH and 1O2-mediated oxidation. Compared to ozonation alone, the CoAl2O4/γ-Al2O3 catalyst demonstrates superior O3 activation capability, significantly enhancing the phenol mineralization efficiency from 13.5% to 56.5% while improving ozone utilization (mgTOCremoved/mgO3consumed) from 0.02 to 0.08. Remarkably, the catalyst maintains excellent stability over multiple reaction cycles. Toxicity evaluation confirms substantial reduction in biotoxicity of the treated wastewater. These findings collectively demonstrate that CoAl2O4/γ-Al2O3-based catalytic ozonation represents an efficient and promising technology for phenolic wastewater treatment.
研究领域:
环境科学
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催化化学
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水处理技术
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高级氧化工艺
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材料化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Min-Ping Zhu,Jia-Cheng E. Yang,Xiaoguang Duan,Dan-Dan Zhang,Shaobin Wang,Baoling Yuan,Ming-Lai Fu
Metal organic frameworks (MOFs)-based catalysts are rising stars in advanced oxidation processes (AOPs) to generate reactive oxygen species (ROS). Nevertheless, constructing an affordable and recyclable MOFs-derived catalyst with high reactivity and stability is highly desirable but still challenging. Herein, we unprecedentedly designed a novel CoAl 2 O 4 @γ-Al 2 O 3 pellet (CoAl 2 O 4 @AP) as a heterogeneous catalyst to activate peroxymonosulfate (PMS) toward ROS generation for metronidazole (MNZ) removal. A CoAl 2 O 4 shell was formed on the pellet surface by direct calcination of the surface-nucleated ZIF-67 on γ-Al 2 O 3 pellets. The strong and unique interactions between the Co species of ZIF-67 and γ-Al 2 O 3 resulted in the formation of interfacial CoAl 2 O 4 . The CoAl 2 O 4 @AP exhibited a remarkably higher efficacy for PMS activation than ZIF-67-derived Co 3 O 4 and commercial Co 3 O 4 . The effects of several reaction parameters (i.e., PMS dosage, reaction temperature, initial pH, and background inorganic ions) on MNZ removal were comprehensively investigated and the degradation pathways of MNZ were elucidated. The Co 2+ /Co 3+ and oxygen vacancies of CoAl 2 O 4 @AP were the intrinsic active centers for PMS activation to simultaneously generate a diversity of ROS, among which SO 4 − and 1 O 2 played the decisive roles in MNZ decomposition. After the reaction, CoAl 2 O 4 @AP can be easily separated from the bulk solution and regenerated via a PMS-assisted cleaning process, making the composites highly appealing for practical applications. This pioneering work on constructing microscopic CoAl 2 O 4 -based composites expands the application of MOFs-based catalysts in novel AOPs systems for the treatment of persistent emerging pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 6
·975
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IF 2.7
Yiwang Dong,Muhammad Yousaf,Muhammad Ali Kamran Yousaf Shah,Muhammad Akbar,Yuzheng Lu,Lei Zhang,Qadeer Akbar Sial,Peng Cao,Changhong Deng
Semiconductor ionic electrolytes, especially heterostructure composites, have a significant role in enhancing oxide ion conductivity and peak power density (PPD) because of their interfacial contact. In this work, the fluorite structure CeO2and spinel-based CoAl2O4samples, as a heterostructure composite electrolyte, are successfully fabricated. The p-type CoAl2O4and n-type CeO2heterostructure (CeO2-CoAl2O4) used as an electrolyte exhibits a cell performance of 758 mW/cm2under fuel cell H2/air conditions at 550 °C, which is quite higher than the pure CoAl2O4and CeO2fuel cell devices. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) verified the heterostructure formation including the morphological analysis of the prepared heterostructure composite. The heterostructure-based CeO2-CoAl2O4composite achieved a higher ionic conductivity of 0.13 S/cm at 550 °C temperature, which means that the constructed device successfully works as an electrolyte by suppressing electronic conductivity. Meanwhile, the obtained results demonstrate the semiconductor ionic heterostructure effect by adjusting the appropriate composition to build heterostructure of the n-type (CeO2) and p-type (CoAl2O4) components and built-in electric field. So, this work exhibits that the constructed device can be effective for energy conversion and storage devices.Keywords:semiconductor ionics;heterostructure;p-n junction;spinel;SOFCs
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2022
·
IF 5.122
Qing Sun,Jingfeng Zhao,Zhibo Hu,Jian Zhang,Jun Yan,Jiawei Sheng
In this work, we successfully report the design and synthesis of rod-like CoAl 2 O 4 /halloysite hybrid pigment from zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF) and tubular halloysite via a facile two-step route for the first time. The as-prepared nanostructures were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared reflection (FTIR Spectroscopy), thermogravimetric and differential scanning calorimetry (TG-DSC), X-ray photoelectron spectrometer (XPS), ultraviolet–visible spectrometry (UV–vis) and CIE L* a* b* colorimetric method . XRD patterns indicated that the presence of CoAl 2 O 4 spinel was observed at various temperatures ranging from 800 to 1100 °C. The SEM and TEM images showed that the nano-pigment has a rod-like hybrid structure composed of nano CoAl 2 O 4 particles and SiO 2 . The color performance of the fabricated pigments was evaluated and given suitable color coordinates (L* = 44.72, a* = −14.40, b* = −37.83) and (L* = 42.57, a* = −7.68, b* = −41.14) at the calcination temperature of 1100 °C for 2 h and 3 h, respectively. The mechanism study indicated that these composites were formed by Co 3 O 4 derived of ZIF-67 as highly active cobalt source and Al 2 O 3 decomposed from halloysite substrate as aluminum source. In addition, the corrosion resistance test showed that the CoAl 2 O 4 composites retain crystalline stability, almost no color deviation in CIE chromatic system even after 1 M HCl leaching. Furthermore, the CoAl 2 O 4 /halloysite exhibited excellent thermal and suspension stability, which indicated it could be a promising candidate for ceramic glazes and water-borne coatings. These findings provide insight into a new strategy for the synthesis of clay mineral-based ceramic pigment .
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Min-Ping Zhu,Jia-Cheng E. Yang,Xiaoguang Duan,Shaobin Wang,Darren Delai Sun,Baoling Yuan,Ming-Lai Fu
Immobilizing metal-organic frameworks in macro-supports to form three-dimensional catalysts holds a great promise in environmental remediation, however quantitative structure/property-catalytic activity relationship remains unknown currently. In this work, we constructed Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 monoliths derived from ZIF-67@γ-Al 2 O 3 pellets and systematically investigated their surface chemistry-activity relationships in peroxymonosulfate (PMS) activation for organic degradation. The activities of Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 catalysts were selectively correlated with their ratios of Co 3+ /Co 2+ and O Defect /O Lattice . The optimized Co 2 AlO 4 /CoAl 2 O 4 @Al 2 O 3 demonstrated an excellent catalytic efficacy toward PMS activation for metronidazole removal in a wide pH range (3.29–10.26) and OH was the dominant oxidant for metronidazole oxidation. The catalyst also exhibited desirable performance for eliminating other emerging contaminants and enduring catalytic activity and stability in PMS activation without regeneration. This study provides new prospects in rational design of robust, cost-effective and self-cleaning/repairing three-dimensional Co-based macroscale-catalysts with an outstanding and lasting catalytic activity for water purification.
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Yongwang Li,Qi Shen,Yao Nian,Fumin Wang,Xubin Zhang,Zhengliang Zhang,Changhao Bing,Xiaolu Fan,Rosine Ahishakiye
The exploitation of base metal catalysts to upgrade biomass chemicals remains a daunting challenge and a sustainable strategy. Here, a series of Co-Al spinel catalysts are rapidly prepared by low-temperature solution combustion synthesis for hydrogenation of furfural (FF) to 2-methylfuran (2-MF), in which oxygen vacancies are easily manipulated by regulating the proportion of glycine in the ingredients. The screened Co/CoAl 2 O 4 incorporating adequate oxygen vacancies yields 2-MF over 97 % at 150 ℃ for 5 h, rivalling the state-of-the-art catalysts to date. Characterizations and DFT calculations attribute the success to oxygen vacancies, which not only enhance the adsorption of FF by changing the adsorption geometry, but also facilitate the hydrogen spillover from Co to substrate by moving down the d -band center of CoAl 2 O 4 . This study provides a versatile methodology for the efficient and low-temperature preparation of spinel and the construction of defect engineering on catalysts, enlightening the design of phenomenal catalysts.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）