JOURNAL OF CLUSTER SCIENCE
·
2024
·Vol. 36
·期 1
·1-12
·
IF 2.7
Liu Jiali,Li Chen,Zhang Shen,Liu Xinni,Wei Xiao,Gao Yue,Wang Fei,Yan Mengwei,Wang Jiaqi,Kamuti Diana
All-inorganic perovskite quantum dots have sparked a research boom due to their excellent optical properties, however, their own strong ionicity and lead toxicity have hindered further development in the field of sensing. In this study, we have solved the toxicity problem of lead-based perovskite quantum dots by replacing lead with green metal bismuth. Meanwhile, due to the ligand-passivation effect of oleylamine and oleic acid, we successfully synthesized highly stable bismuth-based perovskite quantum dots(Cs 3 Bi 2 Br 9 PQDs)in ethanol, and constructed the environment-friendly fluorescence sensor for the quantitative detection of oxytetracycline (OTC) for the first time. The results demonstrated that the fluorescence quenching degree of Cs 3 Bi 2 Br 9 PQDs showed a good linear relationship with the concentration of OTC within the range of 2.0 ~ 18 µM, and the detection limit was 0.432 µM. By studying fluorescence lifetime, absorption spectroscopy, and evaluation of internal filtration parameters, it was proved that the sensing mechanism was caused by the inner filter effect owing to the overlapping of fluorescence emission spectrum of Cs 3 Bi 2 Br 9 PQDs and UV absorption spectrum of OTC. Moreover, Cs 3 Bi 2 Br 9 PQDs fluorescent sensor had good selectivity and anti-interference ability. It is believed that this work will open up a new way for lead-free perovskite quantum dots fluorescence sensor in the field of analytical detection.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wei Dong,Chunyan Du,Yin Zhang,Jiao Cao,Jingyi Jiang,Lu Zhou,Guanlong Yu,Yulv Zou,Huaiyuan Peng,Rong Yan,Yu Yang
Visible light-driven photocatalysis often struggles with fast recombination of photogenerated electron-hole pair and unsatisfactory degradation efficiency of hazardous micropollutants, such as antibiotics. Constructing an effective heterojunction can address these challenges. In this study, a novel S-scheme MIL-53(Fe)/FeOCl heterojunction composite was synthesized using a hydrothermal method. Factors influencing oxytetracycline (OTC) removal and the underlying reaction mechanism were investigated. The MF-10 composite demonstrated a remarkable removal efficiency of 90 %, significantly higher than that of MIL-53(Fe), which was 54 %. Even after six cycles, the degradation efficiency only decreased by 8 %, and the composition of MF-10 remained unchanged, indicating excellent durability. The photocatalytic process involves crucial reactive species such as · OH, SO 4 • – , O 2 • – , and h + . The heterojunction construction extends the absorption range of visible light, and the internal electric field enhances the separation of photogenerated electron-hole pairs while maintaining robust electron and hole activity. Additionally, photogenerated electrons facilitate the Fe(II)/Fe(III) cycling, resulting in the production of more reactive species for OTC degradation. This work introduces a novel approach to enhance the activity of photocatalysts and provides valuable insights into the design of peroxydisulfate activators.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xin Liang,Laishi Li,Yusheng Wu,Feng Liu,Yuzheng Wang
The efficiency of Fenton-like catalysts was critically affected by the rapid transfer of Fe 2+ /Fe 3+ , a process that was essential for the formation of active free radicals by H 2 O 2 . Herein, we synthesized CuS/Fe 3 O 4 @MIL-100(Fe) (CFM) ternary composites using hydrothermal and in-situ growth methods to enhance the degradation of oxytetracycline hydrochloride (OTC-HCl) in a Fenton-like photocatalytic system. The incorporation of CuS as a co-catalyst into the double iron-based system significantly enhanced photocatalytic activity, achieving a 95.31 % degradation efficiency for OTC-HCl within 50 min under optimized conditions. The catalyst had good reusability, has 86.64 % degradation efficiency after five magnetic recovery cycles, and still showed good catalytic performance in the presence of five different concentrations of common anions. Further analysis using active species quenching and electron paramagnetic resonance (EPR) experiments revealed the role of oxygen-containing radicals in the process. Liquid chromatography-mass spectrometry (LC-MS) and density functional theory (DFT) calculations provided OTC-HCl degradation pathways and intermediates. X-ray Photoelectron Spectroscopy (XPS) analysis indicated that CuS enhanced the performance of the bis-iron-based materials by improving the transfer efficiency of Fe 2+ /Fe 3+ and Cu + /Cu 2+ ions, which in turn accelerated the generation of reactive radicals from H 2 O 2 .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yaoping Guo,Qixing Peng,Yaxiong Huang,Shuai Yan,Yan Luo,Keng Xuan,Huimin Hu,Hao Jiang,Guanghui Wang,Sufen Zhao,Yadan Guo
In-situ S-doped mesoporous carbons (ACS) were fabricated through template method by using sucrose as carbon source and basic magnesium sulfate whisker (513 MOS) as both sulfur source and template. ACS were highly efficient for the activation of peroxydisulfate (PDS) towards aqueous oxytetracycline (OTC) removal. Investigation on the effects of 513 MOS/ sucrose mass ratio on the physicochemical properties and catalytic performance indicated that higher specific surface area, pore volume, thiophene-S (C-S-C) group content as well as carbon skeleton defects contributed to the excellent activity of ACS. 100 % of OTC removal was achieved by ACS-2 within 30 min under the optimal reaction condition, which outperformed most reported transition-metal based and carbon-based heterogeneous catalysts. ACS-2 also showed excellent adaptability with wide pH range as well as various pollutants. Mechanism studies showed that PDS were activated through radical and non-radical pathways, and four plausible degradation pathways of OTC were proposed according to the intermediates identification. This work provides a straightforward method for the construction of metal-free sulfur-doped activated carbons with highly activity for the removal of refractory organic pollutants.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Hongbin He,Bolong Liang,Shumin Lin,Yan Chen,Xin Zhang,Shu-Xuan Liang
The residues of oxytetracycline hydrochloride (OTC) in water have potential adverse effects on human health and ecological environment. Photocatalytic degradation has been widely studied in the treatment of antibiotic pollution due to its environmentally friendly and efficient characteristics. However, the band gap of traditional photocatalysts is too wide, and the recombination of photogenerated electrons and holes is serious, which has negative effects on photocatalysis . Therefore, the Z-scheme heterojunction g-C 3 N 4 @MIL-101(Fe) composite photocatalyst was synthesized by high temperature calcination combined with solvothermal method. g-C 3 N 4 @MIL-101(Fe) was characterized by XRD, FTIR , SEM, TEM and other tests. All the results showed that the compound was successful A series of photoelectric tests showed that g-C 3 N 4 @MIL-101(Fe) has a narrower band gap, stronger light absorption ability, and improved the separation rate of photogenerated electrons and holes. Under visible light irradiation, g-C 3 N 4 @MIL-101(Fe) could remove 87.68% of OTC in 300 min. g-C 3 N 4 @MIL-101(Fe) showed good potential for practical application in five real water samples and stability after six cycles. Finally, superoxide radicals and hole radicals were identified as the main reactive species in the photodegradation process. The mechanism and pathway of the photocatalytic degradation of OTC by g-C 3 N 4 @MIL-101(Fe) are proposed. This work expands the construction and application of Fe-MOF based Z-scheme heterostructure and provides a new idea for water pollution remediation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ying Tian,Kunfeng Zhang,Haoran Zhao,Bo Peng,Jinxia Liang,Hongxia Chen,Runfeng Huang,Yuanyuan Wei,Hanyu Chen
Novel 2D/2D TiO 2 /BiOBr (TOB- x , x represented the molar ratio of TiO 2 /BiOBr) heterostructures with dual oxygen vacancies were fabricated via an in-situ hydrothermal approach. Owing to the construction of p-n heterostructure and strong interface interaction, a S-scheme charge transfer path was formed, which facilitated efficiency separation and transfer of charge and retained strong redox capacities of photoexcited electrons and holes. Simultaneously, the introduction of oxygen vacancies induced strong photoabsorption, improving the light harvesting capacity. The oxytetracycline (OTC) degradation efficiencies over TOB-0.05 and TOB-0.1 were significantly improved relative to those of single components. The TOB-0.1 photocatalyst displayed the best photocatalytic activity, which was 3.75 and 1.76 times higher those of TiO 2 -Vo and BiOBr-Vo, respectively. Furthermore, we also examined the effects of pH, ions, and water matrixes on OTC conversion of TOB-0.1, and investigated the photocatalytic degradation mechanism. This work provides a useful guideline for constructing high-efficiency photocatalysts for wastewater treatments by combining 2D/2D heterojunction and dual-defect engineering.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Leming Zhen,Qiyuan Qin,Zhaofu Meng,Na Sun,Ze Liu,Ruohan Cheng,Can Xu,Wenhui Liu,Jingbing Xue
With the development of the nanotechnology industry, the possible coexistence of engineering nanoparticles with organic and heavy metal pollutants in aquatic systems has become a hot issue. However, how different nanoparticles affect the environmental behavior of oxytetracycline (OTC) − copper (Cu 2+ ) complex pollution remains unclear. In this study, we investigated the complex adsorption behavior of nano-TiO 2 and graphene oxide (GO) to OTC and Cu 2+ in water, and the differences of adsorption mechanism are discussed with characteristics analyses. When OTC and Cu 2+ coexist, Cu 2+ formed complexes with OTC, consuming oxygen-containing functional groups of OTC and reducing its adsorption on both nanoparticles. OTC does not affect Cu 2+ adsorption on nano-TiO 2 , but promotes Cu 2+ adsorption on GO. The OTC adsorption on nano-TiO 2 was primarily driven by hydrogen bonding and electrostatic attraction, leaving it with potential mobility. In contrast, the adsorption of OTC on GO was mainly through electrostatic attraction, π-π complexation and hydrogen bonding, and OTC reduced GO to rGO. These strong interactions stabilized OTC on GO surface, reducing its environmental mobility. The results of the research are of great environmental significance for exploring the impact of engineered nanoparticles discharged from industrial production in water on the combined pollution of OTC and Cu 2+ .
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高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 4
·1-19
·
IF 2.4
Gan Yuxin,Liu Dan,Wang Zhipu,Huang Ge,Ze Rumei,Wang Xiaohong,Zhou Jiabin
Iron-based spinel oxides, with excellent catalytic activity and stability, hold promising potential in the photo-Fenton degradation of organic pollutants. In this study, (Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 Mn 0.2 )Fe 2 O 4 was prepared via the solution combustion method. Multiple characterization techniques confirmed the good stability and morphology of (Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 Mn 0.2 )Fe 2 O 4 . It exhibited high-entropy oxide properties, making it suitable as a photo-Fenton catalyst for the efficient degradation of oxytetracycline hydrochloride (OTC-HCl). Under visible light (Vis) with 10 mM H 2 O 2 , 0.06 g/L OTC-HCl, and pH 4.0, the catalyst achieved a degradation efficiency of 92.9%. In the photo-Fenton system, the utilization rate of H 2 O 2 (calculated as the ratio of the degradation amount of OTC-HCl to the consumption amount of H 2 O 2 ) was 34.5, which is 8.3 times higher than that of pure H 2 O 2 (4.2). The catalyst showed good acid–base adaptability, achieving OTC-HCl removal rates exceeding 92.0% across a pH range of 3–11, with a reaction rate constant of 0.08 min −1 at pH 11. Free-radical capture experiments showed that (Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 Mn 0.2 )Fe 2 O 4 catalyzed H 2 O 2 to generate · OH, · O 2 − , and e − , which are the main free radicals involved in the degradation of OTC-HCl. In summary, (Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 Mn 0.2 )Fe 2 O 4 not only addresses the issue of low H 2 O 2 utilization in traditional photo-Fenton systems but also catalyzes the generation of H 2 O 2 under light conditions. Thus, it can serve as an excellent photo-Fenton catalyst for OTC-HCl degradation. Graphical
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
·
IF 8.91
Lijuan Feng,Changyan Xiao,Yuqin Luo,Yan Qiao,Dongzhi Chen
Three common seaweeds including Ulva fasciata, Codium cylindricum and Ishige okamurai were used for the remediation of maricultural wastewater and sediment in the presence/absence of trace level of oxytetracycline (OTC) in lab-scale experiments. Higher NO 3 − -N and PO 4 3- -P removal rates were achieved due to the presence of seaweeds, and trace OTC also had a positive effect on NO 3 − -N removal. A slight variation of 2.10–2.15% were observed in the total relative abundances of antibiotic resistance genes (ARGs) of different sediment samples after one-month operation. However, the variation of ARGs profiles by the co-existence of different seaweeds and OTC was in the descending order of Ishige okamurai > Codium cylindricum > Ulva fasciata , which was in accordance with the variation of microbial hosts at genus level. The abundance of dominant tetracycline resistance genes promoted by the co-existence of different seaweeds and OTC in compared with the presence of single seaweed or OTC via metagenomic sequencing and qPCR analysis, and the co-existence of Ishige okamurai and OTC exhibited the largest impact. The potential pathogens were more sensitive to the co-existence of seaweed and OTC than single seaweeds. Meanwhile, a variety of ARGs were enriched in the pathogens, and the dominant pathogenic bacteria of Vibrio had 133 Vibrio species with 28 subtypes of ARGs. The variation of ARGs profiles in the sediment were strongly related with the dominant phyla Proteobacteria, Actinobacteria, Firmicutes, Planctomycetes and Cyanobacteria . Besides, Nitrate level exhibited more significant effect on ∑ARGs, ARGs resistant to vancomycin and streptogramin _a, while phosphate level exhibited more positively significant effect on ARGs resistant to fosmidomycin, ATFBT and cephalosporin.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Lingyun Jing,Wenhan Yang,Tong Wang,Jingquan Wang,Xiuqin Kong,Suyun Lv,Xinyong Li,Rui Quan,Hao Zhu
In order to further enhance the activation performance of peroxymonosulfate (PMS), an efficient and recyclable ferromagnetic catalyst was successfully fabricated by co-precipitation and hydrothermal methods. We designed commercial hexagonal sheet boron nitride (C-BN) and boron nitrogen micro-nanotubes (BNMTs) to anchor CoFe 2 O 4 nanoparticles (C-BN@CoFe 2 O 4 /BNMTs@CoFe 2 O 4 ). Compared with smooth hexagonal C-BN, BNMTs were rich in pores and oxygen-containing groups. This could effectively immobilize CoFe 2 O 4 to a certain extent, increase the loading of CoFe 2 O 4 and enrich the active sites. Under optimal conditions, BNMTs@CoFe 2 O 4 /PMS system could rapidly and efficiently degrade 92.7% of oxytetracycline (OTC) within 5 min. In addition, the strong binding force between BNMTs and CoFe 2 O 4 enabled favorable regeneration efficiency after 5 cycles (87.6%). BNMTs@CoFe 2 O 4 activated PMS to generate hydroxyl radical (·OH), sulfate radical (SO 4 •- ), superoxide radical (·O 2 – ) and singlet oxygen ( 1 O 2 ) to further attack OTC, SO 4 •- and 1 O 2 were the main activities species. Meanwhile, there was also a non-radical mechanism for the activation of PMS by BNMTs@CoFe 2 O 4 , and OTC achieved a rapid and efficient degradation process through electron transfer. Our survey results were expected to provide new insights for the rational design and application of boron nitride-based materials and transition metal/PMS systems for environmental remediation.
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Desalination and Water Treatment
·
2024
·
IF 1
Yan Chen,Mingyi Liu,Wenwen Fan,Pengfei Xiao
Residual antibiotics in the environment pose a serious threat to the environment. To solve the problems of inter-particle agglomeration, metal ion leaching and difficult recovery of transition metal oxides as catalysis in advanced oxidation processes for the treatment of antibiotic wastewater, pine needle biochar loaded with iron-nickel bimetals (Fe/Ni@PNBC) were successfully produced by the impregnation-co-precipitation method to activate peroxymonosulfate (PMS) for degradation of oxytetracycline (OTC). The Fe/Ni@PNBC catalyst has good surface properties, abundant functional groups and catalytic stability. Under the optimal conditions, the degradation efficiency of OTC with initial concentration of 10~60 mg/L is close to 90%. In addition, 1 O 2 and O 2 ·−- played a major role in OTC degradation. The reaction mechanism for generation of active species and OTC degradation in the reaction system was proposed from two perspectives including redox of iron and nickel ions in different valence states and interconversion between the active substances. After 5 cycles, Fe/Ni@PNBC still maintained a high catalytic activity for OTC degradation. This study provides a new method to prepare an economical and environmentally friendly catalyst for activating PMS to treat antibiotic wastewater.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 6
·1308-1318
·
IF 1.638
Sun Yue,Feng Xinlei,Fu Shun
Inspired by metalloporphyrin-based enzymes, a biomimetic catalyst, R-N-Fe, was prepared by grafting iron phthalocyanine (FePc) covalently onto a macroporous chloromethylated polystyrene-divinylbenzene resin (R), which was pre-functionalized using 4-aminopyridine (4-ampy) as an axial ligand. The novel catalyst was used for the degradation of oxytetracycline hydrochloride (OTCH). The response surface methodology was employed to optimize the independent operating parameters, including temperature, catalyst amount, H 2 O 2 dosage, and initial pH value. The results displayed that the initial pH and temperature had the most significant effect on the removal efficiency. Under optimum conditions, the OTCH removal efficiency was 93.98%. Additionally, the classical quenching experiment and electron paramagnetic resonance (EPR) test indicated that R-N-Fe could generate hydroxyl radicals by decomposing H 2 O 2 , which was the main active species for eliminating OTCH. Furthermore, R-N-Fe can be easily recycled and can maintain high stability in the reusability test, rendering it a good potential for practical application.
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