APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Wenting Li,Hanjie Zhang,Sijie Huang,Jingyi Xu,Liping Liu,Junshan Li,Jianfang Jing,Yongfa Zhu
The efficient activation of peroxydisulfate (PDS) for wastewater treatment remains a great challenge. Photocatalysis, which generates highly-reactive electrons and holes, shows great potential in activating PDS for effective degradation and deep mineralization. Herein, an electron-enriched PDI-SiO 2 photocatalyst was synthesized by covalently linking 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) onto silicon dioxide (SiO 2 ) to form π-π stacked supramolecular PDI layers for efficient PDS activation. The highly dispersed PDI generates electron-enriched PDI· - under visible light, promoting the rapid activation of PDS for bisphenol A (BPA) degradation. The PDI-SiO 2 activated PDS system realized a high BPA degradation rate of 0.100 min −1 and a remarkable mineralization rate of 81%. Moreover, the charge separation efficiency is significantly improved since the electrons of PDI· - are captured by PDS, boosting oxidative degradation and improving the mineralization efficiency. This work developed a novel PDS activation strategy by constructing electron-enriched photocatalyst, and revealed the mechanism of photocatalytic activation and deep mineralization.
研究领域:
环境科学
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材料科学
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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
Guoliang Cao,Qiao Li,Rupeng Wang,Chengyu Wang,Xiaoguang Duan,Shih-Hsin Ho
The advancement and exploitation of modern industry has a significant and far-reaching impact on water environment, prompting to development of advanced technologies for the filtration of oil/water emulsion mixtures and purification of soluble organic contaminants. However, bifunctional materials capable of continuously filtrating multiphase emulsion mixtures and degrading soluble organic contaminants from wastewater are still a concerning issue. Herein, a dual prewetted underwater superoleophobic and underoil superhydrophobic microalgae residue membrane (DMRM) hybrid was developed, which demonstrated outstanding performance in the filtration of multiphase emulsion mixtures and catalytic degradation of microplastics-released BPA. The combination of underoil superhydrophobic oil-containing region (OCR) with underwater superoleophobic water-containing region (WCR) in an integrated membrane promoted successive filtration of multiphase emulsion mixtures. Additionally, DMRM serves as a high-performance carbocatalyst for peroxydisulfate (PS) activation of rapid elimination of BPA. The reagents used in the integrated DMRM/PS system were optimized in a safety dose evaluation by the osteoblasts viability. Hence, the presented results will inspire the future comprehensive environmentally friendly treatment of wastewater with integrated systems and advanced membrane technology.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2023
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IF 8.8
Yansong Ma,Biao Ma,Di Wu,Jun Wang,Yang Li,Xiaobin Fan,Qing Xia,Fengbao Zhang,Wenchao Peng
Perovskite materials are reported to be effective in peroxymonosulfate (PMS) based Fenton-like reactions, the leaching rates of chalcogenide materials in perovskite materials are however serious, thus leading to bad performance in long-term stability. In this study, an O-doped MoS 2 is synthesized to composite with LaCoO 3 , and the high catalytic activity of LaCoO 3 is well preserved with greatly decreased Co leaching. During the BPA degradation with PMS as oxidant, ∼100% degradation can be achieved in 20 min and this degradation efficiency can be maintained for ∼45 h in a simulated fixed bed reactor, which is almost 3 times longer than the pure LaCoO 3 . With the compositing of O-doped MoS 2 , the leached Co was greatly decreased and the dominated reactive oxidation species (ROS) transformed from SO 4 •– into O 2 •– with longer lifespan, thus resulting in the better stability. This study could promote the application of perovskite materials in the real industrial wastewater treatment .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Shuai Wang,Changhao Yao,Yifeng Cai,Yang Yang,Huiyuan Ma,Baojiang Jiang,Jun Ma
In this study, α-Fe 2 O 3 /rGO was smoothly synthesized by a one-step method and employed to activate persulfate (PS) for the degradation of Bisphenol A (BPA) under sunlight. During the degradation experiment, the degradation rates of BPA for PS, α-Fe 2 O 3 /8% rGO, and α-Fe 2 O 3 /8% rGO/PS were 6.6%, 47.6%, and 99.1%, respectively, indicating that the introduction of α-Fe 2 O 3 /rGO and PS significantly enhanced the photocatalytic efficiency because that photocatalytic process and PS activation coupling system not only inhibited the recombination of photo-induced carrier pairs, but also reduced the energy consumption of PS activation. Moreover, electron spin resonance spectroscopy (ESR) and trapping experiments were utilized to explore the active species generated during the reaction. The results showed that •OH and •SO 4 2- were the principal oxidative species in this reaction system. These results showed that Fe-loaded rGO has great potential for activating PS to decompose pollutants in water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Fangxin Deng,Qingze Chen,Yanping Zhu,Xiaoliang Liang,Runliang Zhu,Yunfei Xi
Although various strategies have been developed to boost the reactivity of heterogeneous Fenton catalysts, integrating multiple strategies in one catalyst to achieve high Fenton reactivity is still a challenge. To tackle this issue, the ball-milled peat and magnetite (Mag) composites were hydrothermally treated to synthesize novel heterogeneous Fenton catalyst (i.e., Mag-HTP) for bisphenol A (BPA) removal. The degradation efficiency of BPA (30 mg/L) by H 2 O 2 (2 mmol/L) activated with 50 %Mag-HTP (0.2 g/L) was above 98% within 120 min at initial pH 3. The calculated degradation rate constant of Mag-HTP was 0.0873, which was 20.6 folds higher than that of Mag; moreover, it possessed high reactivity over a wide pH range (3–7) with low H 2 O 2 dosage (0.5–2 mM), and high reaction stability (eight cycles with degradation rate over 95%). The multiple reactive mechanisms were validated: (1) NMR/XPS spectra, H 2 O 2 decomposition, and HO production experiments proved the HTP as an electron donor could directly reduce Fe(III); (2) C-V curves proved the formed C-O-Fe bonds could lower the Fe(II)/Fe(III) redox potential; (3) Raman/EIS spectra, Tafel plot, and radical scavenging tests proved that HTP could serve as an electron shuttle for transferring electrons from H 2 O 2 to Fe(III); (4) NMR spectra proved the formed C-O-C bonds on HTP could function as the dual-reaction-center in Fenton reaction. These multiple mechanisms collectively contributed to the high reactivity of Mag-HTP in the Fenton reaction. Therefore, Mag-HTP shows great potential for practical applications in wastewater treatment and soil remediation due to its cost-effectiveness, easy separation, and high Fenton reactivity.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
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IF 3.9
Congzhi Hu,Yuye Li,Tingting Du,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
In this paper, a new supramolecular Z-scheme heterojunction photocatalyst, designated as Ag/Ag 3 PO 4 /Perylene diimide organic molecules after secondary acid-base self-assembly (PDI-2), was synthesized through precipitation and photoreduction techniques. Ag/Ag 3 PO 4 /60 %PDI-2 (APP-6) exhibited the best photocatalytic activity due to the synergistic effect of Z-scheme heterojunction and surface plasmon resonance (SPR) effect of Ag nanoparticles (Ag NPs). Under visible light (λ > 420 nm), the degradation efficiency of APP-6 for Rhodamine B (RhB) and Bisphenol A (BPA) was 99.7 % and 90.7 %, respectively. Additionally, PDI-2 was transformed into smaller nanoclusters, which increased the specific surface area of the photocatalyst, and reduced the charge transport distance. Moreover, APP-6 exhibited the smallest electrochemical impedance, the largest photocurrent, the smallest fluorescence lifetime. Free radical trapping experiments showed that •O 2 − was the main reactive group and a possible photocatalytic mechanism was proposed by combining the Ultraviolet–visible diffuse reflectance spectrophotometer (UV–vis DRS) and the Mott-Schottky plots.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2021
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IF 5.268
Yuanyuan Liu,Yihan Liu,Linyan Gu,Juan Han,Wenjing Zhi,Yun Wang,Lei Wang
Encapsulating enzyme within MOF (enzyme-MOF) gives rise to new opportunity to improve the fragility of enzyme, but practical application of enzyme-MOF composite is far from being realized. The development of a novel enzyme-MOF composite system should simultaneously guarantee the enhanced activity and controllably complete recycling, and only in this way can we efficiently and economically utilize the enzyme-MOF composite. Herein, we addressed all these fundamental limitations of current enzyme-MOF composite by establishing aptamer-functionalized enzyme-MOF composite (HRP-ZIF-8@P1). HRP-ZIF-8@P1 relied on automatic structure switch of aptamer-target binding and aptamer-cDNA (complementary DNA) hybridization, achieving effectiveness in self-enriching substrate around HRP-ZIF-8@P1 to boost enzymatic activity first, subsequently hybridizing spontaneously with magnetically controllable cDNA sequence (Fe 3 O 4 @P3) to completely recover the HRP-ZIF-8@P1, where preferentially capturing substrate could further induce the release of the hybridized HRP-ZIF-8@P1 for automatically starting the cyclic enzyme catalysis. A 5.6-fold enhancement in the catalytic efficiency for BPA degradation was endowed, and 94.7% catalytic activity was retained for 8 consecutive degradations of BPA, both of which were even more significant than HRP-ZIF-8. Additionally, remarkable stability of HRP-ZIF-8@P1 was afforded by dual-layer protection of ZIF-8 and P1 in denaturing conditions. Taking the possibility of discovering an aptamer for any target into account, the aptamer-functionalized enzyme-MOF composites provide a generic and simple guide for simultaneously boosting enzymatic activity and controllably full recycling the enzyme-MOF systems, accelerating their commercial utilizations.
研究领域:
材料科学
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生物技术
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环境化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Ronghao Wu,Xin Hu,Yihui Li,Yongfu Li,Yanjiang Cai,Peikun Jiang,Bing Yu
Constructing bimetallic nanostructures with specific crystalline phases provides an attractive strategy to develop highly efficient catalysts and explore structure-dependent catalytic properties. Herein, a new iron-based bimetallic catalyst consisting of amorphous MnO 2 and crystalline α-Fe 2 O 3 was synthesized for peroxymonosulfate (PMS) activation, named as a-MnO 2 /α-Fe 2 O 3 . The results show that the removal efficiency of sulfamethoxazole is over 90% within 120 min by the a-MnO 2 /α-Fe 2 O 3 in the presence of PMS at broad pH conditions ranging from 3 to 9. Furthermore, a complete degradation of bisphenol A (BPA) is achieved within 2 min in the a-MnO 2 /α-Fe 2 O 3 /PMS system under optimum conditions, and the BPA degradation rate constant of 1.67 min −1 outperforms most reported Fe- and Mn- based catalysts. The results of electron paramagnetic resonance analysis, quenching tests and Raman spectroscopy analysis show that the mechanism for the a-MnO 2 /α-Fe 2 O 3 -based PMS activation is dominated by the formation of activated surface-PMS complexes. ≡Mn(Ⅳ)–OH and ≡Fe(III)–OH of a-MnO 2 /α-Fe 2 O 3 are active sites for PMS adsorption to form inner-sphere complexes (≡Mn(Ⅳ)-OOSO 3 - ) through the replacement of surface hydroxyl groups. Finally, the a-MnO 2 /α-Fe 2 O 3 exhibits a remarkable removal efficiency of over 99% for BPA in column-bed tests conducted over 600 cycles, demonstrating its immense potential for practical applications.
研究领域:
环境科学
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催化
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材料科学
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化学工程
✓ 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）