CHEMOSPHERE
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2020
·
IF 5.778
Jia Wei,Yitao Liu,Yuhan Zhu,Jun Li
In this research, a one-pot prepared modified sludge bio-hydrochar (IBHC) was prepared to activate persulfate (PS) for the degradation of tetracycline (TC) antibiotic. The obtained IBHC bearing defect structure, dispersed iron and large amounts of surface organic functional groups, acts as an outstanding modified biomass carbonaceous material for catalyzing PS to improve the removal efficiency of TC as high as 99.72%. The IBHC + PS system can remove TC effectively with a relative low IBHC dosage (0.2 g·L −1 ), limited PS consumption (5 mmol·L −1 ) and wide pH values (2–10). In addition, the degradation of TC still keep in 94.70% after 5 rounds reuse proving that IBHC possesses excellent stability and practicability. During the activation, both and • OH were generated and the contribution of each component on the TC degradation in IBHC + PS system was explored. Furthermore, the degradation pathways of TC were proposed based on the results of LC-MS.
研究领域:
环境科学
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化学工程
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Yi Ren,Naiwen Li,Jun Li,Hailong Sun,Bo Lai
In this study, three different cobalt-doped graphitic carbon nitrides (Co/C3N4) were developed with precursors of urea, dicyandiamide, and melamine to activate peracetic acid. Optimal conditions of pH 4.0 and the cobalt ratio were obtained, with high decontamination performance and low leaching. Characterizations of Co/C3N4 indicate that Co/C3N4 synthesized with different precursors showed similar chemical and crystal structures while exhibiting differences in surface morphology and pore structure. Due to the high specific surface area and pore volume, Co/C3N4 with a precursor of urea showed the best activity, k1, for carbamazepine removal, which was 0.07193 min–1, higher than those with precursors of dicyandiamide (0.05084 min–1) and melamine (0.03499 min–1). The main active species for decontamination was identified by quenching experiments, chemical trapping, electron paramagnetic resonance analysis, and isotope labeling, and the results suggest that high-valent cobalt was the main active species and HO• showed minor efficiency for pollutant degradation. The degradation pathway of carbamazepine was proposed, and the results further confirm the main active species of high-valent cobalt, which mainly reacted with the amino group. Moreover, the practicability of Co/C3N4-activated peracetic acid was evaluated by recycling use, different pollutant treatments, and real wastewater treatment. The results indicate the systems showed better decontamination performance for carbamazepine, sulfamethoxazole, and bisphenol S, could effectively resist the interference of the substrate in real wastewater, and could efficiently remove CBZ within five reuse cycles. This study understood the activity and mechanisms of Co/C3N4-activated peracetic acid with different precursors, which might give new ideas on supporter structure design for Fenton-like catalysis improvement.
研究领域:
环境科学
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催化
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水处理
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 45
·16661-16669
·
IF 4
Yi Dong,Yuchi Zhang,Yan Xu
Because of their remarkable qualities including changeable chemical composition, good redox characteristics, and ease of manufacture, non-enzymatic glucose sensors based on metallic hydroxides have attracted much interest. However, enhancement of their peroxidase-like catalytic activity is challenging due to their poor substrate affinity and low electrical conductivity, affecting electron transfer. Herein, a three-dimensional hierarchical architecture of Ni/Co-decorated-Fe layered double hydroxide (NiCoFe-LDH) was straightforwardly constructed on Fe foam (FF) via a feasible corrosion strategy, and the non-enzymatic glucose sensing properties of the NiCoFe-LDH/FF electrode were investigated. In the linear detection range of 0.010–0.1 mM, the electrode exhibits an extreme sensitivity of 5717 μA mM−1 cm−2 with a low threshold for glucose determination of 2.61 μM (S/N = 3) and a short reaction time (∼2 s), which is ascribed to its specific intertwined nanosheet-like morphology with rich electron transfer passages that enhance conductivity and improve the accessibility to more active catalytic sites for glucose oxidation. Moreover, the electrode shows excellent selectivity, good stability, and promising practicality for glucose detection in actual serum samples. These results indicate that the feasible corrosion approach towards the simple synthesis of trimetallic layered double hydroxide electrodes results in improved affinity and stability, holding new prospects for achieving reliable, cost-efficient, and eco-friendly non-enzymatic glucose detection.
研究领域:
材料科学
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电化学
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生物传感器
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Meiyi Liu,Yijian Zhao,Shuai Zhou,Jingsheng Tian,He Cheng,Yi Yang,Yuxian Zhao,Yufei Xu,Guanghua Zhao,Zhiyi Yao
Binary transition metal oxides (BTMOs) have drawn considerable attention in recent years for their excellent catalytic properties and chemical stability in the sensing field. Regrettably, the loss of active site exposure originating from the agglomerate during preparation largely restricted their sensing applications. In this work, we report an efficient strategy for advancing the performance of BTMOs in rapid detection based on a 3D molybdenum disulfide nanoflower. The larger surface area, multiple active site exposures, and higher electrical conductivity promote the dispersion of BTMOs and the redox reaction of analytes on the surface of nanocomposites, thereby enhancing the sensitivity and widening the quantitative range. As a proof-of-method application, ferric vanadate (FeVO4) and ciprofloxacin (CIP) were chosen as model catalysts and analytes, respectively. This approach exhibits excellent sensitivity, selectivity, repeatability, and stability. The detection limit could be as low as 26.6 nM, and the linear range covered 3 orders of magnitude (from 0.1 to 500 μM). It also demonstrated good practicality in milk, honey, and drinking water with a recovery of 90.6% to 100.8%. To our knowledge, this is the first report on incorporating MoS2 into BTMOs for augmenting sensing performance in rapid detection.
研究领域:
材料科学
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纳米技术
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分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
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