Molecular Catalysis
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2017
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IF 0
Yanping Zhu,Minwang Laipan,Runliang Zhu,Tianyuan Xu,Jing Liu,Jianxi Zhu,Yunfei Xi,Gangqiang Zhu,Hongping He
A novel and efficient photocatalyst was synthesized by surface hybridizing Zn/Ti-LDH (LDH) with C60 molecules. The structural characteristics of the resulting products (C60/LDH) were studied using a variety of characterization methods, and the photocatalytic activities of C60/LDH were tested using Orange II (OII) as a model contaminant under simulated solar irradiation. The FT-IR spectra showed that the characteristic mode of C60 at 1182 cm −1 split into two peaks at approximately 1240 and 1156 cm −1 ; in addition, the Raman spectra showed the band at 1422 cm −1 for C60 was upshifted to 1431 cm −1 with the increased doping amount of C60. In addition, the XPS spectra revealed that the peaks of O1s, Zn 2p, and Ti 2p were downshifted slightly. These results demonstrated that chemical interaction existed between C60 and LDH on C60/LDH. The UV–vis diffuse reflectance spectra confirmed that the absorbance of C60/LDH in visible-light region enhanced markedly, as compared with that of pristine LDH. The photoluminescence (PL) spectroscopic measurement revealed that the C60/LDH composites exhibited much weaker PL intensity than that of LDH sample, and the transient photocurrent ( I – V ) analysis showed that C60/LDH had higher photocurrent density than pristine LDH. The results of PL spectra and I–V analysis suggested that C60 molecule could effectively transfer the photoelectrons from the conduction band of LDH, leading to a lower recombination rate of the photo-induced electrons and holes. The photocatalytic experiments showed that C60/LDH had much higher photocatalytic activity in the decolorization of OII than that of pristine LDH, and 2%C60/LDH composite exhibited the highest photocatalytic activity. Furthermore, the stability test indicated that the decolorization efficiency of OII by 2%C60/LDH was still quite efficient after being used for 5 cycles.
研究领域:
材料科学
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环境科学
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产品关联
DOI
Materials Today Energy
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2022
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IF 9.257
Xinlong Zheng,Daoxiong Wu,Yuhao Liu,Jing Li,Yingjie Yang,Wei Huang,Weifeng Liu,Yijun Shen,Xinlong Tian
The photocatalyst is a key component of efficient photocatalytic hydrogen evolution (PHE) via water splitting. Bournonite CuPbSbS 3 has a great application potential in solar-to-energy due to its tremendous semiconductor properties and earth-abundant components. Although CuPbSbS 3 has achieved the highest power conversion efficiency (PCE) of 2.65% in thin-film photovoltaics , its application in PHE via water splitting has been rarely studied. In this work, CuPbSbS 3 nanoflakes with dominate (002) facet is fabricated by a facile butyldithiocarbamate acid (BDCA) solution process, which exhibits a PHE rate of 250.8 μmol g −1 /h without any co-catalyst under simulated solar irradiation. Density functional theory calculations show that plentiful catalytic sites with low ΔG H∗ are responsible for the high hydrogen evolution reaction performance of CuPbSbS 3 . This study represents an effective approach to realize photovoltaic-to-photocatalyst hydrogen evolution of Cu-based quaternary chalcogenides .
研究领域:
材料科学
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能源化学
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理论计算
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DOI
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 1
·12-17
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IF 0.841
Anquan Deng,Yufu Zhu,Lei Zhou,Yuebin Lin
TiO 2 -WO 3 hollow spheres were successfully fabricated by a two-step synthesis method, which combines the polystyrene template-assisted method and chemical deposition method. Scanning electron microscope, energy dispersive spectrometer, and X-ray diffractometer were used to characterise the obtained products. The results indicate that the as-fabricated nanocomposites are double-shelled TiO 2 -WO 3 hollow spherical structures. The photocatalytic properties of the obtained products were determined by the degradation of rhodamine B aqueous solution under simulated solar irradiation. The results reveal that the TiO 2 -WO 3 hollow spheres and pure TiO 2 hollow spheres all have superior photocatalytic degradation ability. Compared with P25 nanoparticles and TiO 2 hollow spheres, TiO 2 -WO 3 hollow spheres exhibit the best photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Licheng Sang,Weiyi Yang,Shuang Gao,Suhua Li,Jian Ku Shang,Qi Li
The development of new kinds of organic semiconductor-based photocatalysts has being attracting more and more research attentions due to their advantages over traditional inorganic photocatalysts and their great application prospects. In this work, polyacrylonitrile (PAN), a low-cost homopolymer largely used in the textile industry, was found for the first time to possess the photocatalytic capability due to its good light absorption and proper electronic band structure to generate radicals. Under simulated solar illumination, it successfully degraded organic pollutants of phenol and sulfamethoxazole (SMX), and disinfected Escherichia coli ( E. coli ) bacteria. After 2 h treatment, the residual concentrations of phenol and SMX decreased to ∼ 75.9 % and ∼ 89 % respectively, while the survival ratio of E. coli cells dropped to only ∼ 28 % after 1 h treatment. h + and ·O 2 – were found to be the main active species in its photocatalytic process. It had a good stability and reusability, and worked well in the real water matrix of tap water, beneficial for its practical applications. PAN, PAN-based organics, and organics with similar structures as PAN could become a new series of organic semiconductor-based photocatalysts for various technical applications, especially as wearable products with self-disinfection property to provide protection against bacteria and viruses.
研究领域:
环境科学
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材料科学
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化学
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水处理
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DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 6
·958
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IF 3.9
Zhigang Wang,Cheng Liu,Fengxi Chen,Rong Chen
Semiconductor photocatalytic performances can be modulated through morphology modification. Herein porous hierarchical BiOBr microspheres (BiOBr-MS) of ~3 μm was firstly self-assembled without the assistance of a template via a facile solvothermal synthesis in triethylene glycol (TEG) at 150 °C for 3 h. KBrO3was exploited as a bromine source, which slowly provided bromide ions upon reduction in TEG and controlled the growth and self-assembly of primary BiOBr nanoplates. The addition of PVP during solvothermal synthesis of BiOBr-MS reduced the particle size by about three-fold to generate BiOBr sub-microspheres (BiOBr-sMS) of <1 μm. BiOBr-sMS exhibited significantly higher photocatalytic activity than BiOBr-MS for aerobic photooxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) under simulated sunlight irradiation (conversions of BzOH (50 mM) over BiOBr-sMS and BiOBr-MS were, respectively, 51.3% and 29.6% with 100% selectivity to BzH after Xenon illumination for 2 h at 25 °C). The photogenerated holes and ·O2−were found to be main reactive species for the BzOH oxidation over BiOBr spheres by scavenging tests and spin-trapping EPR spectra. The higher photocatalytic activity of BiOBr-sMS was attributed to its more open hierarchical structure, efficient charge separation, more negative conduction-band position and the generation of larger amounts of ·O2−.Keywords:BiOBr spheres;hierarchical nanostructures;photocatalysis;benzaldehyde
研究领域:
材料科学
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化学工程
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环境科学
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光化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Xiang Li,Xianyi Gan
A large variety of pharmaceuticals and personal care products (PPCPs) have been detected in water which makes it imperative to explore new materials for their efficient removal. In this study, the photo-Fenton degradation of pharmaceuticals has been investigated systematically via in situ synthesized Cu-doped g-C 3 N 4 . Detailed photoelectrochemical measurements confirm that the adsorption edges of modified g-C 3 N 4 show a remarkable shift (Band gaps decreased from 2.79 eV to 2.17 eV), indicating the advantages of solar light absorption . Three major reactive radicals were identified, including •OH, 1 O 2 , and - ∙O 2 . The sulfadimethoxine (SMT) was degraded completely (> 99 %) at a wide pH range from 4 to 8. A total of 16 micropollutants , including anti-inflammatory, quinolone, and macrolide, were spiked with low concentration (100 μg/L) in simulated water, which can be removed rapidly within only 3 min. To make separating and reusing easy, the powder was successfully loaded onto a PTFE (Poly tetra fluoroethylene) support (0.22 µm) with a loading amount of 1.29 mg/cm 2 . The pharmaceutical can be effectively degraded without obviously losing the active properties under simulated solar irradiation.
研究领域:
环境科学
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材料科学
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水处理
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光化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Yizhi Zeng,Xianghong Ren
Unsymmetrical dimethylhydrazine is a high-energy liquid rocket fuel widely utilized in the aerospace field. Its highly toxic nature poses a significant threat to the ecosystem and human health, necessitating the urgent development of efficient and environmentally friendly treatment technologies. In this study, a (001) crystal facet-dominated 001-TiO 2 /CeO 2 S-scheme heterojunction was constructed via a solvent hydrothermal-photoassisted method. Under simulated solar light irradiation, the catalyst demonstrated a degradation efficiency of 98.4 % for high-concentration Unsymmetrical dimethylhydrazine wastewater (100 mg/L) within 140 min, while effectively decomposing highly toxic intermediates with a mineralization rate reaching 84.5 %. This is attributed to the synergistic interaction between the crystal facet effect and the S-scheme heterojunction, which significantly enhances the spatial separation and transfer of photogenerated carriers. The intermediate products were identified using solid-phase microextraction coupled with gas chromatography-mass spectrometry (SPME-GC–MS), revealing the possible degradation pathways of Unsymmetrical dimethylhydrazine and elucidating the reaction mechanism. This study offers a viable approach for the efficient degradation of Unsymmetrical dimethylhydrazine wastewater, offering significant reference value for advancing wastewater treatment in the aerospace industry.
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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航空航天工程
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分析化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Zongping Wang,Lisan Cao,Ying Wan,Jingwen Wang,Fan Bai,Pengchao Xie
Degradation of tetrabromobisphenol A (TBBPA), an emerging micropollutant, by photo/Fe 3+ /sulfite process was investigated under different operational conditions and water matrices. 91% of TBBPA was efficiently degraded within 30 min in the Fe 3+ /sulfite system under sunlight irradiation when the initial pH was 6.0, which is much higher than that of TBBPA without irradiation (52%). The acceleration of radical generation and direct photolysis by photo irradiation were responsible for the enhanced TBBPA degradation. Although this process showed better performance on TBBPA degradation in weak acid conditions, the high removal efficiency was also achieved at near-neutral pH. HO , SO 4 − and direct photolysis contributed to TBBPA degradation. Direct photolysis and SO 4 − presented the dominant contribution. The degradation rate increased with elevating the Fe 3+ dose (10–40 μM), but slightly decreased when the Fe 3+ dose was further raised to 100 μM. Similarly, the degradation efficiency initially increased with increasing the sulfite dose (100–400 μM), but decreased when the sulfite concentration reached 1000 μM. Dissolved oxygen played a crucial role in TBBPA degradation, the presence of water matrices such as humic acid (0.8–4.0 mg/L), bicarbonate (0.5–10 mM) and chloride (0.5–10 mM) retarded TBBPA degradation. This study proposed a new efficient strategy to enhance TBBPA degradation in the Fe 3+ /sulfite process.
研究领域:
环境科学
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水处理
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光化学
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产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
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2024
·Vol. 11
·期 14
·4229-4240
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IF 6.1
Lingwan Hao,Jie Gao,Xiaoli Han,Zexiang Li,Yanhong Dong,Liwei Sun,Lu Zhou,Zhaocai Ning,Jie Zhao,Rujian Jiang
Frequent outbreaks of respiratory diseases caused by the spread of pathogenic microorganisms poses a great threat to human health. Disposable surgical masks (SM) can limit the transmission to some extent but the inability to self-sterilize leads to a potential source of cross-contamination as well as causing hazardous impacts on the soil and aquatic ecosystems. Herein, a sunlight-triggered photoactive self-sterilization metal–organic framework (MOF) film modified SM is reported. The MOF film can be prepared easily and quickly by the co-assembly of UiO-66 nanoparticles and metal-phenolic networks (MPNs, the complexation of tannic acid and iron ions). Unlike the traditional MPN only assisted assembly, this MOF film exhibited a dramatic synergetic photodynamic and photothermal self-sterilization ability for protective equipment surfaces under simulated-solar irradiation without any extra photosensitizers or photothermal agents. A study of the mechanism revealed that the light absorption region of UiO-66 can be expanded by the MPNs, demonstrating a unique photocatalytic sensitization, and thus the MOF film can utilize the sunlight extensively to achieve a photodynamic property. Moreover, such an MOF film demonstrated excellent cytocompatibility, haemocompatibility and breathability, indicating the security of the skin-touched application. This dual-modal photocatalytic MOF film are promising for the long-term usage of disposable protective equipment and for mitigating the heavy burden on the environment.
研究领域:
材料科学
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环境科学
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生物医学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yoann de Rancourt de Mimérand,Kun Li,Cong Zhou,Xiaoyun Jin,Xiaoxian Hu,Yufei Chen,Jia Guo
Inorganic photocatalysts became an essential and powerful tool for the remediation of polluted water. However, important limitations of photocatalysts in their colloidal form, especially nanosized, remain. For instance, their separation from water after use and recovery, which can be particularly demanding, time- and energy-wise. Considering such aspects, supported catalysts bear significant advantages. However, efforts still have to be made to develop processes that allow the permanent and efficient immobilization of inorganic photocatalysts in sustainable conditions, in order to maintain the advantages of supported catalysts over colloidal ones. Herein, we report the use of an aqueous-phase plasma-aided grafting (APPAG) process to produce functional and efficient hybrid photocatalysts. More specifically, based on cold plasma discharge (CPD), ZnO/Bi2MoO6 heterojunctions were permanently immobilized on polymer supports generated by 3D-printing, with fractal-inspired designs. Three different approaches of the APPAG process have been successfully used for the immobilization of the inorganic phase, that is core–shell-assisted direct grafting, indirect grafting and in situ complexation-assisted precipitation (ISCAP). Noticeably, the latter technique has never been reported before to our knowledge. These three immobilization routes rely on different strategies and yield to distinct morphological specificities, but all allow using mild synthesis conditions and producing stable, active, permanently immobilized coatings of photocatalysts. Regarding the preparation of the organic supports, two sorts of additive manufacturing (AM) technologies were employed, namely fused-deposition modeling (FDM) and liquid crystal diode (LCD)-based SLA (stereolithography). The use of fractal geometries combined with AM permits the production of supports with relatively high surface areas, in a single processing step. Overall, the three plasma-based immobilization methods revealed to be efficient and the performance of the different hybrid photocatalysts have later been assessed through the photodegradation of Rhodamine B dye under simulated sunlight irradiation and visible light only, with promising results.
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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等离子体技术
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增材制造
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DOI
高影响因子
CHEMOSPHERE
·
2023
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IF 8.8
Kexue Liu,Chunliu Liang,Huijuan Lv,Xiangfeng Yao,Xianxu Li,Jia Ding,Na Chen,Suo Wang,Wenrong Liu,Xue Hu,Jun Wang,Huanshun Yin
As a kind of plasticizer , butyl benzyl phthalate (BBP) presents a serious hazard to the ecosystem. Therefore, there is a strong need for an effective technique to eliminate the risk of BBP. In this work, a new photocatalyst of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 with an S-scheme heterojunction was synthesized using Bi(NO 3 ) 3 as the Bi source, Na 2 S as the S source, and DMF as the carbon source and reductant. Numerous techniques have been used to characterize Bi/Bi 2 O 2 CO 3 /Bi 2 S 3, such as scanning electron microscopy, high-resolution transmission electron microscopy , X-ray diffraction, and X-ray photoelectron spectroscopy. The improved photoactivity of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was evaluated by photoelectrochemical response, electrochemical impedance spectroscopy, photoluminescence , UV–Vis diffuse reflectance spectroscopy, and electrochemical Mott Schottky spectroscopy. The enhanced photocatalytic activity of this composite for BBP degradation under simulated sunlight irradiation could be attributed to the surface plasmon resonance effect of Bi metal and the heterojunction structure of Bi 2 O 2 CO 3 and Bi 2 S 3 . The degradation rate of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was 85%, which was 4.52 and 1.52 times that of Bi 2 O 2 CO 3 and Bi 2 S 3 , respectively. The prepared photocatalyst possessed good stability and reproducibility in eliminating BBP. The improved photocatalytic activity of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was demonstrated with the formation of an S-scheme heterojunction, and the degradation mechanism was discussed with a liquid chromatograph mass spectrometer .
研究领域:
环境科学
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材料科学
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化学工程
✓ 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）