APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Xiangdong Kong,Yan Liu,Pai Li,Jingwen Ke,Zhongyu Liu,Fawad Ahmad,Wensheng Yan,Zhenyu Li,Zhigang Geng,Jie Zeng
As CO 2 coordination with the metal sites in molecular catalysts represents an effective means to CO 2 activation, it is important to develop molecular catalysts with high ability of CO 2 coordination to enhance their catalytic performance in CO 2 electroreduction. Herein, we investigated the coordinate activation of CO 2 with Co-based molecular catalysts by manipulating their ligand structures. During CO 2 electroreduction, the current density of Co-salophen for CO was −16.0 mA cm −2 at −0.75 V versus reversible hydrogen electrode ( vs RHE), which was 7.6 times of that (−2.1 mA cm −2 ) of Co-salen. In addition, the Faradaic efficiency (FE) of Co-salophen for CO reached 75 % at −0.70 V vs RHE, whereas the FE of Co-salen for CO production was 19 %. In-situ experiments and mechanistic studies revealed that both Co-salophen and Co-salen adopted a side-on coordination of CO 2 with Co sites. Moreover, the bonding between CO 2 and Co sites was strengthened in Co-salophen, resulting in the enhanced activity of Co-salophen.
研究领域:
化学
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催化科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2023
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IF 5.5
Jiayang Zheng,Cheng Liu,Zhiwen Wang,Yingzhang Shi,Yidong Hou,Jinhong Bi,Ling Wu
Ultrathin TiO 2 nanosheets (NST) containing Ti 3+ sites are developed as a photocatalyst that exhibits high degradation efficiencies (98.6%) for the degradation of enrofloxacin (ENR) under visible light. The increment of degradation efficiencies for ENR over NST is mainly due to the increase of Ti 3+ and oxygen vacancies (OVs). Ti 3+ sites on the surface of NST can be associated with ENR molecules through the formation of surface coordination species -COO∙∙∙Ti- intermediates, resulting in the activation of ENR. OVs on NST can adsorb and activate more O 2 molecules to accelerate the generation of O 2 - by photogenerated electrons reduction. The photogenerated holes quickly transfer to the surface of the catalyst to directly degrade the activated ENR. Finally, a possible mechanism about the synergistic effect of coordination activation and photocatalysis is proposed over NST at a molecule level. This study highlights the significant role of coordination activation in the photocatalytic degradation of antibiotics.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qi Chen,Cheng Liu,Rui Liu,Yidong Hou,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of 2D/2D MoS 2 /Bi 2 WO 6 S-scheme heterojunctions consisting of ultrathin MoS 2 nanosheets (MS, 1.6 nm) and ultrathin Bi 2 WO 6 nanosheets (BWO, 1.5 nm) were developed for photocatalytic degradation of ciprofloxacin. The samples with 5 % mass ratio of MS (5 %MS/BWO) exhibits the almost complete degradation of ciprofloxacin (≈100 %) under visible light. It is evidenced that the formation of S-scheme heterojunction with close interfacial interaction facilitates the photoinduced carrier separation and the generation of surface acid sites. The activation of ciprofloxacin molecules is realized through the coordinately interaction of C-N and C=O with the surface W sites. Moreover, the OVs in BWO side is a convenient pathway for activated of O 2 , embodying in the generation of •O 2 − and •OH under visible light over photocatalyst. Such an association of charge transfer mechanism with coordination activation shows the enhanced photocatalytic performance toward ciprofloxacin. This work provides a motivation which designs an S-scheme heterojunction photocatalyst with the ability to activate the specific group in molecules to comprehend the degradation of antibiotics.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Qi Chen,Ling Hu,Yingzhang Shi,Cheng Liu,Yidong Hou,Jinhong Bi,Jimmy C. Yu,Ling Wu
Heterogeneous photocatalytic degradation of antibiotic involves the activation of antibiotic molecules and the photocatalytic oxidation process. However, the simultaneous improvement of these processes is still a challenge. Herein, S-scheme heterojunctions consisted of Cu 2 O nanocluster with defective WO 3 nanosheets were constructed for efficient photocatalytic degradation of levofloxacin (LVX). The typical CNS-5 composite (5 wt% Cu 2 O/WO 3 ) achieves an optimal LVX degradation efficiency of 97.9% within 80 min. The spatial charge separation and enhancement of redox capacity were realized by the formation of S-scheme heterojunction between Cu 2 O and WO 3 . Moreover, their interfacial interaction would lead to the loss of lattice oxygen and the generation of W 5+ sites. It is witnessed that the C–N of piperazine ring and C O of carboxylic acid in LVX are coordinated with W 5+ sites to build the electronic bridge to activate LVX, greatly promoting the further degradation. This work highlights the important role of selective coordination activation cooperated with S-type heterojunctions for the photocatalytic degradation and offers a new view to understand the degradation of antibiotics at molecular level.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Ling Hu,Zhiwen Wang,Yingzhang Shi,Cheng Liu,Yidong Hou,Jinhong Bi,Ling Wu
The defect-rich ultrathin WO 3 nanosheets are successfully prepared as photocatalysts via heating treatment for the pristine WO 3 nanosheets (NS) in vacuum (NSV) and N 2 atmosphere (NSN). The increment of degradation efficiencies of levofloxacin (LVX) over NS (49.9 %)
研究领域:
环境科学
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材料科学
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化学
✓ 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）