JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8236-8246
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IF 3.442
Wen Yun,Zhao Yue,Guo Mingzhen,Xu Yan
Photo-Fenton reactions and the related functional nanomaterials have been widely studied for applications in wastewater treatment industry. Herein, visible-light-responsive Fe 2 O 3 nanoparticle-decorated BiVO 4 nanoplates were designed and successfully prepared through a one-pot hydrothermal route. The as-prepared Fe 2 O 3 /BiVO 4 nanocomposites exhibit excellent photo-Fenton catalytic activity toward the discoloration of methylene blue (MB) and Rhodamine B (RhB) dye molecules in the presence of H 2 O 2 . The experimental results indicate that nearly 100% of MB (100 mL, 10 mg L −1 ) and RhB (100 mL, 5 mg L −1 ) dye molecules are degraded in the presence of 1 g L −1 Fe 2 O 3 /BiVO 4 -1 (FB-1) photo-Fenton catalyst and 0.5 mL of H 2 O 2 within 20 min. The Fe 2 O 3 /BiVO 4 Fenton photocatalyst also demonstrates high reusability under visible light irradiation with λ ≥ 420 nm. The photoinduced electrons on the conduction band of BiVO 4 nanoplates can move toward the surface of Fe 2 O 3 /BiVO 4 to accelerate the reduction of Fe 3+ ; then, the as-formed Fe 2+ ions on the surface of the catalyst greatly enhance the decomposition of H 2 O 2 to form reactive · OH species for the use in photodegradation of MB and RhB dye molecules. The synergetic effect of Fe 2 O 3 and BiVO 4 reported in this work might provide more opportunity to fabricate other novel semiconductor-based Fenton nanocomposites for contamination treatments in wastewater.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Binyang Zhang,Mengdie Chen,Dongya Li,Haiming Xu,Dongsheng Xia
FeOCl was prepared by a partial thermal decomposition method to effectively catalyze hydrogen peroxide under the visible light for the degradation of toxic organic wastewater. The combination of DRS and VB-XPS indicated that FeOCl is a narrow band gap catalyst with visible light absorption capacity (Eg =1.63 eV). The degradation rate constant of RhB in FeOCl/H 2 O 2 /Vis system is about 13.4 times that of FeOCl/H 2 O 2 system. Compared to other heterogeneous Photo-Fenton systems, the oxidant utilization efficiency in FeOCl/H 2 O 2 /Vis system is higher. In addition, FeOCl has stable Photo-Fenton activity in a wide pH range (3.0–9.0). The content of Fe(II) increased after 5 cycles reaction through the ESR and XPS characterization, which proves that the electron transfer of Fe(III)/Fe(II) was improved during the reaction. After quantitative analysis of the ·OH generated in the reaction, the formation rate of ·OH in FeOCl/H 2 O 2 /Vis system is increased about 30% compared with FeOCl/H 2 O 2 /dark system. These results indicate that visible light excites FeOCl to generate produces photogenerated electron-hole pairs, accelerating the cycle of Fe(III)/Fe(II), promoting the production rate of ·OH, and enhancing the catalytic efficiency of FeOCl.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
MOLECULES
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2023
·Vol. 28
·期 2
·607
·
IF 4.6
Juntao Guo,Yihui Zhang,Jinjun Li,Feng Wu,Liting Luo
Pyrite has been used in photo-Fenton reactions for the degradation of pollutants, but the application of photo-Fenton processes with extra H2O2in real water/wastewater treatment has still been limited by the economic cost of H2O2and artificial light sources. Herein, citric acid (CA) and simulated/natural sunlight are used to develop a pyrite-based photo-Fenton system (pyrite–CA–light) in situ generating H2O2through the enhanced activation of molecular oxygen. The degradation of pharmaceuticals and personal care products (PPCPs), especially acetaminophen (APAP) as the main target pollutant, in the pyrite–CA–light system was investigated. The effects of influencing factors such as various organic acids, APAP concentration, pH, pyrite dosage, CA concentration and co-existing anions (HCO3−, Cl−, NO3−, SO42−and H2PO4−) were examined. At a pyrite dosage of 0.1 g L−1, CA concentration of 0.6 mM and an initial pH of 6.0, the degradation efficiency of APAP (30 μM) was 99.1% within 30 min under the irradiation of xenon lamp (70 W, λ ≥ 350 nm). Almost the same high efficiency of APAP degradation (93.9%) in the system was achieved under natural sunlight irradiation (ca. 650 W m−2). The scavenging experiments revealed that the dominant active species for degrading APAP was hydroxyl radical (HO•). Moreover, a quantitative structural–activity relationship (QSAR) model for pseudo-first-order rate constants (kobs) was established with a high significance (R2= 0.932,p= 0.001) by using three descriptors: octanol–water partition coefficient (logKow), dissociation constant (pKa) and highest occupied molecular orbital (HOMO). This work provides an innovative strategy of the photo-Fenton process for the degradation of PPCPs using natural minerals and ordinary carboxylic acid under sunlight.Keywords:pyrite;citric acid;sunlight;photo-Fenton;PPCPs;QSAR
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2020
·
IF 7.864
Chi Yang,Chunyan Zhang,Xiaosan Luo,Xiaoyan Liu,Fang Cao,Yan-lin Zhang
So far, studies on the conversion of stereochemistry under photo-Fenton conditions and their atmospheric implication are still rare. Here, we found that the biomass burning marker, the chiral compound levoglucosan (L), undergoes oxidative degradation under photo-Fenton conditions and can be isomerized into mannosan (M) and galactosan (G) simultaneously. Among the formic acid, acetic acid, and oxalic acid in the degradation products of levoglucosan, it was found that the yield of formation of formic acid in the photo-Fenton pathway can be as high as 86%. It is worth noting that both levoglucosan and its isomers are present in the atmosphere and their concentrations are strongly correlated. At the same time, the range of their concentration ratios, L/(G + M), measured in the photo-Fenton experiments in the laboratory was found to agree well with that measured in atmospheric PM2.5 samples. However, the sources of L, G, and M in the atmosphere are complex, and the photo-Fenton reaction may be an essential pathway for the distribution of L, G, and M in the atmosphere.
研究领域:
环境科学
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大气化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yan Wang,Tao Yang,Jing Chen,Shaobin Wen,Die Li,Bingyu Wang,Qiang Zhang
A novel ferrocene-based nanofiltration membrane is prepared to combine filtration and photo-Fenton reaction for water treatment. Membranes containing ferrocene groups are successfully fabricated via an integration of layer-by-layer interfacial polymerization and ion exchange reaction. Rejection performance towards bisphenol S (BPS) increases with the growth of the interfacial polymerization layer, and the optimal membrane shows the highest rejection rate of 98.1%. For the optimal photo-Fenton system with H 2 O 2 , UV and ferrocene-based membrane (PS/HTCC-3/FcSO 3 ), the degradation rate of k is 0.092 min −1 , which is 1.8 times higher than that of the system with only H 2 O 2 and UV. Meanwhile, the salinity of BPS in the optimal system is 2 times higher than that of the system with H 2 O 2 and UV. After the heterogeneous photo-Fenton process, PS/HTCC-3/FcSO 3 can reject 65.6% of the BPS degradation by-products based on the variation of total organic carbon (TOC). In addition, quenching experiments prove that ·OH is the primary active radical, and the yield of ·OH in the optimal system is the highest compared with the system with H 2 O 2 and UV. The outstanding performance of ferrocene-based membrane demonstrates its potential for micropollutants treatment.
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
ENVIRONMENTAL TECHNOLOGY
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2022
·
IF 3.475
Kang-Ping Cui,Ting-Ting Yang,Yi-Han Chen,Rohan Weerasooriya,Guang-Hong Li,Kai Zhou,Xing Chen
Antibiotic pollution of water resources is a global problem, and the development of new treatments for destroying antibiotics in water is a priority research. We successfully manufactured recyclable magnetic Fe3O4/g-C3N4 through the electrostatic self-assembly method. Selecting tetracycline (TC) as the target pollutant, using Fe3O4/g-C3N4 and H2O2 developed a heterogeneous optical Fenton system to remove TC under visible light. Fe3O4/g-C3N4 was systematically characterized by SEM, TEM, XRD, FTIR, XPS, DRS, and electrochemical methods. The removal efficiency of 7% Fe3O4/g-C3N4 at pH = 3, H2O2 = 5 mM, and catalyst dosage of 1.0 g/L can reach 99.8%. After magnetic separation, the Fe3O4/g-C3N4 photocatalyst can be recycled five times with minimal efficiency loss. The excellent degradation performance of the prepared catalyst may be attributed to the proper coupling interface between Fe3O4 and g-C3N4 which promotes the separation and transfer of photogenerated electrons. Photogenerated electrons can also accelerate the conversion of Fe3+ to Fe2+, thereby producing more ˙OH. The new Fe3O4/g-C3N4 can be used as a raw material for advanced oxidation of water contaminated by refractory antibiotics.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 48
·69301-69313
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IF 4.223
Xiao
Ruyi,Zhang Yuanyuan,Wang Shuangfei,Zhu Hongxiang,Song Hainong,Chen Guoning,Lin Hongfei,Zhang Jian,Xiong Jianhua
The heterogeneous photo-Fenton-like process is emerging as a promising treatment of antibiotics-containing wastewater. The preparation of new efficient and stable catalysts is one of the research fields. A composite catalyst, prussian blue (PB) modified CeO 2 was prepared, characterized, and applied for photo-Fenton oxidation of norfloxacin (NOR) in this study. It was found that chemical doping of PB leaded to more oxygen vacancies and increased the surface area of CeO 2 obviously. PB/CeO 2 with more Ce 3+ facilitated electron transfer between Fe 3+ /Fe 2+ with Ce 3+ /Ce 4+ . PB could also improve the separation rate of photoexcited electron-hole pairs in CeO 2 nanostructures. When the doping ratio of PB and CeO 2 was 10%, PB/CeO 2 show the highest catalytic degradation ability and 88.93% of NOR could be degraded within 30 min. PB/CeO 2 composite showed well reactivity at the wide pH value range of 3–8. The reusable experiments and low iron dissolution with less than 1 mg/L indicated that PB/CeO 2 could be employed as an efficient heterogeneous photo-Fenton-like catalyst in organic contaminants degradation.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Haiyi Jin,Wangyi Zhou,Zhenyu Guo,Hailiang Xu,Xiaoli Zhong,Tai-Shung Chung,Die Ling Zhao,Hongjun Lin
The escalating presence of antibiotics and antibiotic-resistant bacteria in wastewater poses a pressing threat to both human health and ecosystems. Addressing this challenge requires innovative approaches while photocatalytic membranes emerge as promising solutions because they offer multiple functions to separate and degrade/sterilize antibiotics and antibiotic-resistant bacteria simultaneously. In this study, we for the first time developed in-situ grown Ni-Fe metal-organic framework/carbon quantum dot (NiFe-MOF/CQD) membranes with NiFe-MOF seeds pre-integrated into the substrates. The incorporation of CQDs not only enhances the hydrophilicity and integrity of NiFe-MOF membranes that results in both a high water flux of 119.7 L m −2 h −1 bar −1 and a high antibiotic rejection of 98.1% to rifampicin, but also promotes the photo-Fenton activity by enhancing the visible light absorption and photoelectrons (e − )-holes (h + ) separation. Therefore, the degradation efficiency of rifampicin in a photo-Fenton system within 100 min by NiFe-MOF/CQD composites (84.9%) surpasses that of NiFe-MOFs (63.1%). Additionally, NiFe-MOF/CQDs can effectively inactivate both Gram-negative and Gram-positive bacteria in the photo-Fenton system. The supreme separation performance of NiFe-MOF/CQD membranes and photo-Fenton activity of NiFe-MOF/CQDs underscore the significant potentials of the newly invented photocatalytic membranes in treating wastewater containing antibiotic and antibiotic-resistant bacteria.
研究领域:
环境科学
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材料科学
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微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Yue Sun,Sisi Wang,Mengya Li,Minghua Xiong,Hui Zhang
In recent years, the widespread usage of profenofos in agricultural practices has increased its residues in the environment, posing a serious threat to environmental and human health. However, the degradation efficiency of profenofos through either biotic or abiotic processes alone remains low, and these processes are often accompanied by the generation of secondary pollutants. In this study, a novel hybrid nanocatalyst, OpdB/Fe 3 O 4 @GO@ZIF-8, was synthesized through in situ encapsulation of profenofos hydrolase OpdB and graphene oxide (GO)-wrapped Fe 3 O 4 particles into ZIF-8 crystals via biomimetic mineralization to achieve efficient removal of profenofos. The encapsulated OpdB protected by the ZIF-8 framework exhibited high enzymatic activity in the integrated system. Additionally, the introduction of GO promoted the transfer of photo-generated electrons between ZIF-8 and Fe 3 O 4 , mediating the formation of free radicals during the photo-Fenton reaction. The encapsulated OpdB first specifically catalyzed the hydrolysis of profenofos to produce the main by-product, 4-bromo-2-chlorophenol (BCP), subsequently Fe 3 O 4 @GO@ZIF-8 rapidly degraded BCP through oxidative dehalogenation. The heterojunction exhibited excellent degradation performance for profenofos, implementing the complete detoxification of 50 mg L −1 of profenofos at an irradiation intensity of 300 W and 6 mM H 2 O 2 at pH 5 within 3 h. This performance is superior to any single biodegradation and inorganic catalysis reported previously. The enhanced degradation ability of OpdB/Fe 3 O 4 @GO@ZIF-8 could be attributed to the synergistic effect of the heterojunction formed between the bio-enzymatic and chemical catalysis systems. Overall, this strategy provides novel insights into the construction of heterojunction catalysts based on metal-organic frameworks for the removal and remediation of refractory pesticide pollution in the environment.
研究领域:
环境科学
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生物催化
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Hongai Zheng,Mengyao Li,Shuangyan Jiang,Cunzheng Xiao,Meilin Zhu,Yao Zhou,Derui Wang,Xin Sun,Daquan Zhang,Lizhi Zhang
Herein, the MIL-88A/Carbon quantum dots (CQDs) was synthesized by a hydrothermal method , and the polyvinylidene fluoride (PVDF) membrane modified by the MIL-88A/CQDs was fabricated by vacuum-assisted suction filtration. Compared with the pristine membrane, MIL-88A/CQDs modified membrane based on collaborative photo-Fenton/filtration process shows better removal efficiency for methylene blue (MB), rifampicin (RIF), methyl orange (MO), and Rhodamine B (RhB). In addition, the anti-fouling properties of the modified membrane are significantly improved, and the flux recovery of the MIL-88A/CQDs modified membrane increased from 56% to 89%, and the irreversible fouling ratio (R ir ) decreased from 44% to 11%. Significantly, the modified membrane contaminated by MB within 20 min can achieve self-cleaning through the photo-Fenton process. Finally, a possible membrane antifouling mechanism is proposed: superoxide radicals (•O 2 - ) and hydroxy radicals (•OH) are the main active substances. CQDs accelerates the e − and h + separation of MIL-88A and promotes the circulation of Fe substances. The fundamental research will present a promising strategy for improving antifouling properties of membrane.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2017
·
IF 2.659
Shilei Wang,Qin Li,Fengxi Chen,Jun Ke,Rong Chen
Owing to the strongly morphology and size-dependent properties of nanomaterials, developing a simple and eco-friendly approach for controlling synthesis and assembly of hierarchical CuO nanostructures plays a critical role. In this work, we successfully developed an eco-friendly and facile hydrothermal route for controllable synthesis of various morphologies CuO nanostructures, where traditional and toxic additives were replaced by biocompatible 4-(2-hydroxyethyl)-1-piperazineethane-sulfonic acid (HEPES). The growth rate and orientation of CuO nanoparticles were tuned through adjusting the concentration and pH value of HEPES. The XRD pattern, SEM, UV-DRS, and BET indicated CuO nanostructures maintained high purity and excellent crystalline nature and showed more regular morphology and size with enhanced visible light absorption. The analogous photo-Fenton assay demonstrated that the as-prepared CuO nanostructures present enhanced dye removal capability when compared with CuO synthesized in pure water. Furthermore, the antibacterial assay on S. aureus was also investigated, and CuO nanoparticles with smallest size displayed the best antibacterial performance. These results reveal that HEPES shows a remarkable influence on the possible application of as-prepared CuO nanostructures which having great potential in pollutant removal.
研究领域:
材料科学
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环境科学
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生物学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2017
·Vol. 44
·期 1
·1-11
·
IF 1.369
Yan Xuefeng,Gan Kaifeng,Tian Baozhu,Zhang Jinlong,Wang Lingzhi,Lu Deli
A yolk–shell-structured sphere composed of a superparamagnetic Fe 3 O 4 core and a carbon shell (Fe 3 O 4 @HCS) was etched from Fe 3 O 4 @SiO 2 @carbon by NaOH, which was synthesized through the layer-by-layer coating of Fe 3 O 4 . This yolk–shell composite has a shell thickness of ca. 27 nm and a high specific surface area of 213.2 m 2 g −1 . Its performance for the magnetic removal of tetracycline hydrochloride from water was systematically examined. A high equilibrium adsorption capacity of ca. 49.0 mg g −1 was determined. Moreover, the adsorbent can be regenerated within 10 min through a photo-Fenton reaction. A stable adsorption capacity of 44.3 mg g −1 with a fluctuation <10% is preserved after 5 consecutive adsorption–degradation cycles, demonstrating its promising application potential in the decontamination of sewage water polluted by antibiotics.
研究领域:
环境科学
·
材料科学
✓ 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）