CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-16
·
IF 2.4
Hu Rui,Wang Haiyin,Luo Jiahui,Song Jianjun,Jia Haiyuan
Peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) have been proven to be an effective method for the removal of tetracycline in water. In this study, the Co 3 O 4 /molecular sieve catalyst synthesized by the incipient wetness impregnation method was used for PMS activation. The effect of specific surface area on the catalytic performance of Co 3 O 4 /molecular sieve catalyst was investigated and analyzed in detail by characterization techniques. In the Tetracycline hydrochloride (TCH) degradation experiment, the Co 3 O 4 /13X catalyst exhibited the highest specific surface area (490.584 m 2 /g) and provide abundant active sites, enabling 98.0% TCH degradation within 30 min under optimal conditions (1.5 g catalyst, 0.3 mM PMS, pH 8.0, 25℃), with a reaction rate constant (k obs ) of 0.0977 min -1 . In addition, the degradation mechanism of TCH was explored using electron paramagnetic resonance (EPR) spectroscopy and quenching experiments. It was confirmed that free radicals (SO 4 •− , •OH, O 2 •− ) and non-free radical species ( 1 O 2 ) generated during the reaction play a crucial role in the degradation process of TCH. In summary, the Co 3 O 4 /13X catalyst, when activating PMS, exhibits a remarkable synergistic effect on the degradation of TCH, and shows good repeatability and environmental adaptability. This study provides valuable insights into the design and optimization of catalysts for degrading antibiotic pollutants in water treatment processes. Graphical
研究领域:
环境科学
·
催化
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水处理
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化学工程
·
污染物降解
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产品关联
DOI
高影响因子
ANALYST
·
2020
·Vol. 145
·期 24
·7849-7857
·
IF 3.978
Chang Liu,Chunyu Huang,Ruixue Ma,Wanying Zhai,Jingjing Deng,Tianshu Zhou
This work demonstrates a new strategy for sensing cerebrospinal acetylcholinesterase (AChE) as a cholinergic biomarker for brain dysfunction based on graphene quantum dot (GQD)-functionalized lanthanide infinite coordination polymer (Ln-ICP) nanoparticles. The ICPs used in this work were comprised of two components, i.e. a supramolecular Ln-ICP host formed by the coordination between the GMP ligand and central metal ion Tb3+, and guest GQDs with abundant functional groups, which were utilized as antenna ligands to further sensitize the fluorescence of Tb/GMP. Upon excitation at 300 nm, the obtained GQD@Tb/GMP ICP nanoparticles exhibited enhanced green fluorescence from Tb/GMP. With the addition of Cu2+, the competitive coordination between Cu2+ and GQDs weakened the antenna effect, leading to a decrease in the fluorescence of GQD@Tb/GMP ICPs. However, in the presence of thiocholine (TCh), a thiol-containing compound hydrolyzed from acetylthiocholine (ATCh) by AChE, a stronger coordination interaction between Cu2+ and TCh occurred, resulting in the restoration of the fluorescence of GQD@Tb/GMP ICPs. Using the method established herein, the cerebrospinal AChE fluctuation of rats with acute organophosphorus pesticide (OP) poisoning or chronic Alzheimer's disease (AD) could be monitored. This study essentially provides a novel approach to realize the direct monitoring of a biomarker for brain dysfunction by regulating the competitive coordination interaction reversibly, which is critical in the early diagnosis and therapy of brain diseases.
研究领域:
纳米技术
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生物化学
·
神经科学
·
分析化学
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医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Yanrui Su,Xiaoyu Li,Zimu Gao,Jiajia He,Zizhen Liu,Linjun Duan,Tian Sun,Jiaoge Wu,Dan Liang,Chaojun Wei,Faying Fan,Wa Gao
The incorporation of dual redox sites within catalytic materials for H 2 O 2 activation represents a promising approach to enhance the efficiency of pollutant decomposition. In this study, Cu 2 O modified CuFe-LDH nanocomposite (Cu 2 O/CuFe-LDH) was successfully synthesized via in situ topotactic transformation of CuFe-LDH. The catalytic degradation performance of the Cu 2 O/CuFe-LDH nanocomposite was investigated utilizing tetracycline hydrochloride (TCH) as a typical antibiotic contaminant. It demonstrated exceptional catalytic activity, achieving a TCH elimination rate of 93.0 % in 60 min. A rate constant value of 0.0426 min −1 was calculated for the pseudo-first-order kinetic model, which was 1.6 times and 5.0 times higher than those of CuFe-LDH and Cu 2 O, respectively. Moreover, the Cu 2 O/CuFe-LDH nanocomposite demonstrated remarkable cycling stability (85 % degradation rate after 5 recycling cycles), a wide pH range (3−11), resistance to background ion interference, and lower toxicity of the products of degradation. Based on radical scavenger tests and electron paramagnetic resonance (EPR) spectroscopy, it was verified that TCH degradation was mediated by 1 O 2 , •OH and •O 2 - , with 1 O 2 playing an essential role. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) investigations indicate that the remarkable catalytic efficacy of Cu 2 O/CuFe-LDH is predominantly due to the synergistic interactions between Cu 2 O and CuFe-LDH, with Cu 2 O promoting the accelerated dual Cu 2+ /Cu + and Fe 3+ /Fe 2+ cycling. Thus, the Cu 2 O/CuFe-LDH nanocomposite exhibits exceptional efficiency, environmental friendliness and recyclability, rendering it an ideal candidate for practical wastewater treatment applications.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Huanjun Zhang,Yanan Yu,Yi Li,Li Lin,Chi Zhang,Wenlong Zhang,Longfei Wang,Lihua Niu
Intimately coupled photocatalysis and biodegradation (ICPB) is a promising technology to remove refractory contaminants from water. The key to successful ICPB is a carrier capable of accumulating biofilm and adhering photocatalyst firmly. Herein, BC/g-C 3 N 4 was prepared into a three dimensional porous hydrogel and used as a carrier in ICPB system for the first time. Degradation experiments revealed that the removal rate of tetracycline hydrochloride (TCH) in water by the ICPB system was 96.0% after 10 h, which was significantly higher than that by the photocatalysis (PC, 76.3%), biodegradation (B, 32.5%), adsorption (AD, 17.2%), and photolysis (P, 5.0%) systems. Photo-electrochemical tests confirmed that ICPB system had superior electron transfer ability between photocatalysts and microorganisms . The removal efficiency of COD proved that microorganisms played an important role in the mineralization process of TCH by the ICPB system. After the ICPB degradation experiment, microorganisms maintained high activity and Pseudomonas , Burkholderiaceae and Flavobacterium which had TCH degradation or electron transport ability, were enriched. In conclusion, the novel ICPB carrier overcame shortcomings of the traditional ICPB carrier and the novel ICPB system had superior degradation performance for TCH. This study provided a possible method to promote the practical application of ICPB technology .
研究领域:
环境科学
·
水处理
·
光催化
·
生物降解
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yanan Song,Rui Zhang,Baoyuan Dong,Yuan Liu,Mingming Zhang,Xiaoxue Hu,Jiake Li,Jianxian Zeng,Kaipeng Cheng,Lelin Zeng,Jie Shen
To address the persistent challenges of low separation efficiency and severe membrane fouling in water treatment, we engineered multifunctional mixed matrix membranes (MMMs) through a facile one-step phase inversion method by incorporating zeolitic imidazolate framework-8 (ZIF-8) nanoparticles (0.1–1.0 wt%) into a polyethersulfone (PES) matrix. The effects of ZIF-8 loading (0.1–1.0 wt%) on the morphology, hydrophilicity, porosity, pore size, water flux of the MMMs were investigated. The optimal MMMs delivered a water flux of 299.2 L/m 2 ·h, surpassing the pure PES membrane by 65.90 %. Furthermore, the optimized MMMs demonstrated a 516 % increase in permeate flux along with a 113 % increase in bovine serum albumin (BSA) rejection rate simultaneous, indicating their potential to break through the trade-off effect. The improved rejection rate of BSA was attributed to size exclusion and electrostatic repulsion, originating from the introduction of ZIF-8 nanoparticles. In addition, the rejection rate of Congo Red (CR), Rhodamine B (RhB) and tetracycline hydrochloride (TCH) elevated from 40.94 %, 15.40 % and 59.33 % to 95.40 %, 37.40 % and 96.80 %, respectively. This enhancement stems from the incorporated ZIF-8 nanoparticles, which simultaneously modulated the MMMs' structure and imparted specific interactions: Electrostatic attraction and π-π stacking to CR, electrostatic repulsion and π-π stacking to RhB, and π-π stacking to TCH. Furthermore, the MMMs exhibited improved antifouling performance with the increased flux recovery ratio and reduced irreversible fouling ratio. This facile one-step engineering strategy provides a scalable and efficient route to fabricate high permeability, multifunctional MMMs with increased rejection and improved antifouling performance for integrated separation of proteins, dyes, and antibiotics in complex wastewater.
研究领域:
膜科学
·
环境工程
·
材料科学
·
水处理技术
·
分离过程
✓ 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）