Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jianhui Xu,Yufeng Liu,Dan Li,Chunhui Zhang,Xin Fu,Yunfei Zhang,Pengxu Wang,Jincheng Lu,Shenggui Chen,Lei Li
Electrocatalytic technology (EC) is a promising strategy for peroxymonosulfate (PMS) activation due to its environmental safety and energy conservation. Herein, 3D printed blue TiO 2 nanotube arrays (3DP-BTNAs) reactive electrochemical membranes (REM) were designed as anode and cathode in EC and EC/PMS systems. EC/PMS system displayed superior performance for acetaminophen (ACT) degradation and detoxication. The ACT degradation in EC/PMS system was 3.70 times faster than that in EC system. Quenching experiments suggested that singlet oxygen ( 1 O 2 ) mediated nonradical pathway was responsible for ACT degradation in EC/PMS system, while hydroxyl radical (•OH) was the predominant reactive oxygen species (ROS) in EC system. Our study first provided direct evidence that PMS activation on cathode was mainly triggered by superoxide radical (O 2 •- ). PMS was reduced by O 2 •- derived from O 2 reduction on cathode, and subsequently converted into ROS for organics oxidation . However, PMS tended to adsorb on anode and formed 3DP-BTNAs-PMS* complex for organics degradation. The influencing factors (e.g., PMS dosage, flow rate) on ACT degradation in EC/PMS system were evaluated, and the obtained optimal kinetic constant and lowest energy consumption were 0.135 min −1 and 0.27 Wh/L, respectively. In addition, eight degradation products were identified and possible degradation pathways of ACT were proposed to be the cleavage of C-N bonds and benzene ring. This study is dedicated to the rational design of highly porous REM material by 3DP technology for wastewater treatment and the in-depth mechanism of PMS activation over BTNAs electrode in EC/PMS system.
研究领域:
环境科学
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化学工程
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材料科学
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水处理
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DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 23
·5281-5289
·
IF 6.813
Zhefei Zhao,Xingyu Luo,Jiaxi Peng,Siqi Wang,Tianyang Guo,Huajun Zheng
Electrocatalytic conversion of biomass-derived platform molecules is regarded as an emerging approach to obtain high-value fuels and chemicals. Herein, a heterostructured design strategy involving dispersed Ag nanoparticles immobilized on one-dimensional TiO2 nanotubes (Ag-TiO2 NTs) for the electroreduction of 5-hydroxymethylfurfural (HMF) into 2,5-dihydroxymethylfuran (DHMF) was reported. The optimal electrode exhibited an 82.2% FE, 89.8% selectivity, and DHMF productivity value of 0.1 mmol cm−2 h−1. Electrochemical measurements combined with density functional theory (DFT) calculations manifested that the superior performance was derived from the heterojunction-induced metal–semiconductor interactions at the interface, by which the TiO2 NTs and Ag bring complementary advantages inhibiting the hydrogen evolution reaction (HER) and facilitating charge transfer. Moreover, the catalytic activity of the Ag sites on Ag-TiO2 NTs was considered separately. The mass activity of Ag on Ag-TiO2 NTs reached 5.8 mol L−1 g−1, which was far more than that of Ag mesh (0.038 mol L−1 g−1), indicating the significantly enhanced activity of Ag with high utilization. This could be attributed to the controllable nucleation of Ag through the confinement effect of TiO2 NTs, acquiring dispersed Ag nanoparticles. The design scheme for the heterostructured Ag-TiO2 NTs electrocatalyst displays prospective applications for developing highly efficient electrocatalysts for the electrochemical reduction of HMF.
研究领域:
电化学
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材料科学
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催化
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Junxiang Zhang,Zhuanpei Wang,Xuelian Li,Jie Yang,Chenhui Song,Yongpeng Li,Jianli Cheng,Qun Guan,Bin Wang
The fiber-shaped dye sensitized solar cell represents a promising flexible power conversion system for next generation wearable electronics due to its facile preparation, lightweight, and good weavability. However, the use of fiber-shaped dye sensitized solar cells is largely limited by their low power conversion efficiency and flexibility. Herein, a flexible Pt-free fiber-shaped dye sensitized solar cell with a high power conversion efficiency of 10.28% is fabricated, by sequentially growing polyaniline layers and Co0.85Se nanosheets on the surface of carbon fibers as the counter electrodes and TiO2 nanotubes grown on the Ti wire as the photoanode. The polyaniline layer can not only work as the nucleation sites for the following deposition of the Co0.85Se nanosheets but also act as the catalytic sites with large specific surface area to further improve the catalytic activity and reduce the charge transfer resistance, while the Co0.85Se nanosheets can further improve the electrocatalytic activity for the transition of I–/I3–, leading to a remarkably enhanced photovoltaic performance of the cell. This result provides a new design strategy for high-performance flexible fiber-shaped dye sensitized solar cells.
研究领域:
材料科学
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纳米技术
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太阳能
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可穿戴技术
✓ 已验证
DOI
ELECTROANALYSIS
·
2015
·Vol. 28
·期 1
·161-168
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IF 2.138
Meichuan Liu,Jing Yu,Xue Ding,Guohua Zhao
In this work, a visible-light driven photoelectrochemical (PEC) aptasensor with high sensitivity and selectivity for cyanobacterial toxin Microcystin-LR (MC-LR) has been developed. MC-LR aptamers, serving as the specific recognition element, were conveniently immobilized onto vertically-aligned titanium dioxide nanotubes (TiO 2 NTs) photoanode substrate with the aid of graphene via π–π stacking interactions between the graphene hexagonal cells and the nucleobases of the DNA. The functionalization of graphene further endowed the constructed aptasensor visible-light response activity. The aptasensor was used for the label-free analysis of MC-LR by monitoring the increase in photocurrent that resulted from the binding of MC-LR and its aptamers. Results showed that the photocurrent increment had a linear relationship with logarithm of MC-LR concentration in the range from 1.0 to 500 fM and the limit of detection reached as low as 0.5 fM. Furthermore, the aptasensor exhibited high selectivity while used to detect 100-fold concentration other several potential coexisting interferents. A promising PEC aptasensing platform for highly sensitive and selective monitoring of MC-LR has thus been established.
研究领域:
环境科学
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分析化学
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纳米技术
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毒理学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Huan He,Qingsong Yue,Qicheng Ma,Xiaoxia Yang,Juhong Zhan,Feng Liu,Zhicheng Liao,Ziwei Guo,Bin Huang,Xuejun Pan
The reuse of reclaimed water has been limited by the ecological and human health risks of the residual trace organic pollutants , antibiotic-resistant bacteria and antibiotic resistance genes it often contains. The emerging photoelectrocatalytic technology may be able to break through this bottleneck. Nevertheless, the detailed information about such technology in the reclaiming water treatment has not been fully addressed. A laboratory-scale photoelectrocatalytic purification system was constructed using TiO 2 nanotube arrays doped with BiFeO 3 nanoparticles as the anode and carbon/polytetra-fluoroethylene as the cathode. The anode was stable with excellent optical and electrochemical properties. About 5.6 log of antibiotic-resistant bacteria were inactivated within 30 min, and 60% of free antibiotic resistance genes were removed within 60 min. The effective removal was mainly due to mutual promotion between photoelectrocatalysis and Fenton reactions which produced abundant active radicals. Low concentrations of effluent organic matter promoted the inactivation. The process was demonstrated in a bench-scale reactor treating 17α-ethinylestradiol and antibiotic-resistant bacteria with high removal rates. The designed photoelectrocatalytic reactor can provide efficient technology for the reuse of reclaiming water.
研究领域:
环境工程
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水处理
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光电催化
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废水回用
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Jingju Cai,Minghua Zhou,Xin Xu,Xuedong Du
Anode materials are crucial to anodic oxidation for wastewater treatment. In this regard, stable boron and cobalt co-doped TiO 2 nanotube (B, Co-TNT) was prepared for the first time, and its lifetime was found increased significantly while electrocatalytic activity decreased with the increase of Co(NO 3 ) 2 in preparation from 1 to 10 mM. Characterized by scanning electron microscope (SEM), X-Ray Diffraction (XRD) and X-ray Photo-electronic Spectroscopy (XPS), B and Co content were optimized and successfully doped on TNT, which was more smooth without ripple with Co content of 0.038 mg/cm 2 in a valence of +2, and B atomic content of 2.17 at.% in form of Ti-B-O. This optimized anode enhanced electrode lifetime 122.8 times while the electrochemical activity decreased slightly when compared to the undoped TNT. The effects of current density, initial pH and initial 2,4-dichlorophenoxyacetic acid (2,4-D) concentration were investigated, and the mainly responsible radical for degradation was confirmed to be the surface OH on B, Co-TNT anode. This anode had better performance on the TOC removal, mineralization current density (MCE) and energy consumption (Ec) when compared with BDD, PbO 2 , DSA and Pt anodes, and it also presented a very stable degradation for 10 cycles oxidation of 20 mg/L 2,4-D with allowable Co leaching. Therefore, B, Co-TNT anode is a promising, stable, safety and cost-effective anode for application in electrochemical advanced oxidation processes (EAOPs).
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Analytical Methods in Chemistry
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2017
·
IF 1.801
Longli Lin,Qijun Wu,Xun Gong,Yu Zhang
To solve the problem of separation and recovery of photocatalyst in water, the modification of TiO2 was studied as well as its immobilization and photocatalytic properties. To improve surface properties, TiO2 nanotubes were synthesized by a hydrothermal method and silylated by silane coupling agents to introduce a certain functional group. Supported on polyurethane (PU) membrane, TiO2 nanotubes were prepared to produce immobilized PU/TiO2. Catalysts were characterized and identified by means of Fourier-transform infrared spectroscopy (FTIR), attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). Results showed that silylated TiO2 nanotubes were well grafted on the surface of the activated PU membrane. With a 300 W high pressure mercury lamp as light source, the photocatalytic activity and stability of immobilized PU/TiO2 were investigated with degrading methyl orange. It was showed that the target is degraded by immobilized PU/TiO2 with high activation and the catalytic performance is stable for a long time if catalyst is washed with ethanol.
研究领域:
材料科学
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环境工程
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hongtao Liu,Chong Chen,Yucheng Liu,Haoran Sun,Xu Huang,Zhijing Wang,Lizhang Wang
Electrochemical oxidation (EO) has emerged as a promising technology for eliminating recalcitrant organic pollutants from wastewater, yet its industrial implementation is constrained by the intrinsic limitations of conventional anodes, including sluggish charge transfer kinetics, rapid passivation, and excessive energy consumption. The simultaneous resolution of these drawbacks at low cost remains challenging. Herein, we engineered high-efficiency and stable CoNi-Sb-SnO 2 /enhanced TiO 2 nanotube arrays (ETNA) anode through a novel dual-strategy cobalt doping. Cobalt-triggered electron shuttling and ETNA interlayer optimization synergistically enhances the electrode’s electrocatalytic activity, conductivity, and stability. Experimental results reveal that Co dopants create electron-deficient centers to enrich charge density on adjacent Sn/Sb sites, synergizing with Ni-mediated O 3 production to enable ultrafast hydroxyl radical (·OH) yield (93.9 % tetracycline removal in 30 min) across a broad pH range. Crucially, the cobalt-bridged ETNA interlayer, with enriched oxygen vacancy and reconstructed anode surface, significantly reduces charge transfer resistance by 62.2 % and suppresses substrate corrosion, extending the anode lifespan to 15.7-fold while saving 54.8 % energy consumption. Density functional theory (DFT) calculations further corroborate that Co doping declines the d-band center, weakening oxygen intermediate adsorption and facilitating ·OH desorption. This work establishes a paradigm for achieving comprehensive electrode performance enhancement through targeted electronic structure engineering, enabling the development of cost-effective and durable anodes with direct applicability to low-concentration organic wastewater treatment.
研究领域:
环境科学
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电化学
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材料科学
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水处理技术
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 78
·49759-49768
·
IF 3.108
Chaorui Xue,Shengliang Hu,Qing Chang,Ying Li,Xi Liu,Jinlong Yang
Anodized TiO2 nanotube arrays have important applications in the area of photocatalysis and biomedicine. In this study, with the aim of improving the photocatalytic and biomedical properties of TiO2 nanotube arrays, we prepared both single and double layer walled TiO2 nanotube arrays and subjected them to hydrothermal treatment in strontium acetate solution. It was found that fluoride doped SrTiO3/TiO2 nanotube arrays could be formed after hydrothermal treatment without the failure of the single and double layer walled structure. In the case of fluoride doped SrTiO3/TiO2 nanotube arrays with a double layer walled structure, doping of fluoride induced a visible light response, formation of SrTiO3 benefited the separation of photogenerated electron–hole pairs, and the double layer walled structure led to an enlarged surface area. Due to the synergetic effect of above three factors, the fluoride doped double layer walled SrTiO3/TiO2 nanotube arrays demonstrated the highest photocatalytic activity under ultraviolet, visible and simulated solar light irradiation. The degradation rates of methylene blue solution are 0.13 h−1, 0.26 h−1 and 0.53 h−1 respectively. Moreover, ability to induce hydroxylapatite formation on the surface was also examined through an immersing test in simulated body fluid. The results indicated that SrTiO3, doped fluoride and a double layer walled structure could stimulate the hydroxylapatite formation by providing a larger number of hydroxyl ions, hydroxyl radicals and reactive initiation sites, thus the fluoride doped double layer walled SrTiO3/TiO2 nanotube arrays also exhibited the best ability to form hydroxylapatite on the surface.
研究领域:
光催化
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jiangwen Xu,Jinxu Song,Haotian Li,Hui Song,Zicong Yang,Yukun Chang,Wenyuan Zhou,Jinshu Wang,Hongyi Li
The chlorine evolution reaction (CER) is essential for chlorine (Cl 2 ) production. However, the catalyst deactivation and side reaction oxygen evolution reaction (OER) are still serious problems for CER. Improving the stability and selectivity of catalyst for long term electrocatalytic reaction in large current density is highly desired. In this work, a self-supporting Ti/RuO 2 @TiO 2 nanotubes (NTs) electrode had been developed by co-sputtering titanium (Ti) and ruthenium oxide (RuO 2 ) onto the high-ordered titanium dioxide (TiO 2 ) nanotubes substrate. This process produced a well-distributed incorporation of Ti species within the RuO 2 coating. It has revealed that the presence of Ti element optimizes the surface morphology of electrode and modulates the electronic state of ruthenium (Ru) species, effectively preventing over-oxidation and thereby enhancing stability. The Ti/RuO 2 @TiO 2 NTs self-supporting electrode exhibits remarkable electrocatalytic activity for CER, evaluated by lower overpotential (58 mV) at 10 mA cm −2 and reduced Tafel slope (78 mV dec −1 ) than that of other electrodes. Moreover, its mass activity achieving 478 mA mg Ru −1 at 1.3 V (vs SCE) is 4.3 times that of commercial dimensionally stable anodes (DSA). After operating for approximately 150 h at 100 mA cm −2 , the electrode exhibits minimal performance degradation, underscoring its exceptional stability. Additionally, the large potential difference between CER and OER makes it maintain high Cl 2 selectivity, achieving up to 91 % across varying current densities and reaction times. This work provides valuable strategy for designing novel Ru-based catalysts for practical CER applications in seawater and industrial environments.
研究领域:
电化学
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材料科学
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催化
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 67
·40904-40915
·
IF 3.119
Qiushi Jiang,Shang Wang,Xue Li,Zhaolian Han,Chunli Zhao,Tingting Di,Siyuan Liu,Zhiqiang Cheng
MoS2 nanosheets were grown on TiO2 nanotubes by the simple hydrothermal method for the first time. The layer-by-layer growth of MoS2 nanosheets led to a significant increase in the specific surface area of TiO2/MoS2 burst tube composites compared with TiO2 burst tubes, a significantly enhanced ability to separate photo-induced carriers, and synergistic adsorption and visible light catalytic activity of dye molecules. The maximum adsorption (qmax) of MB was 72.46 mg g−1. In addition, 94.1% of MB could be degraded after 30 minutes of visible light irradiation. The microsurface morphology, structure, chemical composition, element valence and band width of TiO2/MoS2 nanocomposites were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy (PL). The mechanism of photocatalytic reaction was studied via free radical capture experiments.
研究领域:
材料科学
·
纳米技术
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环境科学
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光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）