JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
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IF 3.261
Yi Wang,Xinyan Xiao,Jiayi Chen,Xingye Zeng
A novel AgBr and GO co-decorated g-C 3 N 4 /Ag 2 WO 4 (g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO) composite was successfully fabricated by hexadecyl trimethyl ammonium bromide (CTAB)-assisted co-deposition of AgBr and GO onto g-C 3 N 4 /Ag 2 WO 4 composite. The as-prepared composites were characterized by XRD, SEM, TEM, FT-IR, BET, XPS, UV–vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), and electrochemistry impedance spectroscopy (EIS). The photocatalytic efficiency for tetracycline (TC) degradation over the as-prepared g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO composite is 91.64% within 100 min simulated sunlight irradiation, which is nearly 2.59 and 5.25-folds greater than those of the g-C 3 N 4 /Ag 2 WO 4 and g-C 3 N 4 samples. The enhancement of photocatalytic performance is mainly ascribed to the introduction of AgBr and GO, which serve as photosensitizer and electron acceptor, respectively, confirmed by the results of DRS, PL, and EIS. The active species trapping experiments confirmed that O 2 − and h + are the dominant reactive species responsible for TC degradation. Furthermore, a reasonable n-n heterojunction-based photocatalytic mechanism for the g-C 3 N 4 /Ag 2 WO 4 /AgBr/GO composite was proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuwen Chen,Ke Zhu,Wenlei Qin,Zhiwei Jiang,Zhuofeng Hu,Mika Sillanpää,Kai Yan
Spinel oxides are recognized as promising Fenton-like catalysts for the degradation of antibiotics. However, the catalytic performance is restrained by the poor electron transfer rate (ETR). Herein, hollow NiCo 2 O 4 @C nanocages are rationally designed and prepared to accelerate ETR in peroxymonosulfate (PMS) activation for tetracycline (TC) degradation. Enhanced ETR of the NiCo 2 O 4 @C/PMS system is due to three aspects: (1) The hollow nanocage facilitates the diffusion and adsorption of TC, improving the ion transfer at a macroscopic level; (2) Electron reconfiguration in octahedral sites of NiCo 2 O 4 increases the ratio of Co 2+ , resulting in highly efficient PMS activation; (3) In-situ generated carbon acts as “electron shuttles”, improving the electrical conductivity of catalysts at a microscopic level. As a result, the NiCo 2 O 4 @C demonstrates rapid ETR, leading to a high-efficiency activation of PMS. The NiCo 2 O 4 @C/PMS system exhibits exceptional TC degradation efficiency and reusability. Non-radical pathway, including 1 O 2 and direct electron transfer, dominates the system. This work offers a feasible strategy for enhancing electron transfer in the Fenton-like system.
研究领域:
环境科学
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材料科学
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催化
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水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Libing Chu,Jianlong Wang,Shijun He,Chuanhong Chen,László Wojnárovits,Erzsébet Takács
In present study, the treatment of real pharmaceutical wastewater from an erythromycin (ERY) production factory by gamma irradiation was investigated. Results showed that a variety of antimicrobial resistance genes (ARGs), involving MLSB, tet , bla , multidrug, sul , MGEs and van genes and plentiful 9 bacterial phyla were identified in the raw wastewater. In addition to ERY, sulfamethoxazole (SMX) and tetracycline (TC) were also identified with the concentration of 3 order of magnitude lower than ERY. Results showed that the abatement of ARGs and antibiotics was much higher than that of antimicrobial activity and COD. With the absorbed dose of 50 kGy, the removal percentage of ARGs, ERY, antimicrobial activity and COD was 96.5–99.8%, 90.0%, 47.8% and 10.3%, respectively. The culturable bacteria were abated fast and completely at 5.0 kGy during gamma irradiation. The genus Pseudomonas was predominant in raw wastewater (56.7%) and its relative abundance decreased after gamma irradiation, to 1.3% at 50 kGy. With addition of peroxymonosulfate (PMS, 50 mM), the antimicrobial activity disappeared completely and ERY removal reached as high as 99.2% at the lower absorbed dose of 25 kGy. Ionizing radiation-coupled technique is a potential option to treat pharmaceutical wastewater for reduction of antibiotics, ARGs and antimicrobial activity.
研究领域:
环境工程
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废水处理
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辐射化学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jin Chen,Jiayu Lei,Jie Yan,Yuzhao Ma,Xiaofeng Yang,Yanjun Li
The establishment of a surface plasmon resonance (SPR) effect and an internal electric field (IEF) has been recognized as an effective technique for optimizing pollutant treatment in aquatic environments. Herein, we synthesized a novel 2D/2D Pt@BiOBr/Bi 2 WO 6 S-scheme heterojunction that establishes robust interfacial connections to enhance electron transport through minimized pathways, while simultaneously increasing active site availability. Subsequently, noble metal Pt was employed to modify the BiOBr/Bi 2 WO 6 composite material, thereby inducing SPR and broadening the light absorption range. Impressively, the optimized Pt@BiOBr/Bi 2 WO 6 demonstrates a significantly enhanced degradation efficiency for organic pollutants, primarily due to the synergistic effects of SPR and IEF. The degradation rate of tetracycline hydrochloride (TC-HCL) through the ternary heterojunction 2-PBB can achieve 100 % within 30 min under 500 W of visible light irradiation, showcasing impressive cyclic stability. Furthermore, the developed photocatalyst also demonstrated remarkable degradation efficiency for organic dyes such as Rhodamine B (RhB) and methyl orange (MO). This work demonstrates an original approach to the fabrication of Pt-modified S-scheme heterojunction photocatalysts with high effectiveness.
研究领域:
环境科学
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光催化
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材料科学
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纳米技术
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水处理
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2021
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IF 4.291
Xue Li,Wenting Liu,Jiaojiao Fang,Hengming Huang,Cheng Zhu,Yaru Ni,Liang Fang,Jiahui Kou,Chunhua Lu,Zhongzi Xu
The incorporation of multiple up-conversion (UC) materials into dual-layered UC films presents a promising strategy for achieving multi-peaks spectrum. Here, we developed dual-layered UC films containing triplet-triplet annihilation up-conversion luminescence (TTA-UCL) chromophores and NaYF 4 :Yb 3+ ,Tm 3+ nanoparticles to enable multi-peaks emissions at 340−360 and 390 nm in the transmission manner and 340, 360 and 400–440 nm in the reflection manner under irradiations of green and NIR light. The light absorption and emission behaviors from different film surfaces were studied clearly. Besides, TiO 2 and g-C 3 N 4 with different absorption spectra were chosen to verify the availability of the dual-layered films to tune emission spectra. When both green and NIR light were used simultaneously, TiO 2 and g-C 3 N 4 can degrade tetracycline (TC) by 2.14 and 1.77 times more than the cases where single light was used alone. The photocatalytic abilities of TiO 2 or g-C 3 N 4 can be further improved by the selective increase in NIR or green light power density due to their different absorption spectra. The dual-layered films containing TTA-UCL chromophores and NaYF 4 :Yb 3+ ,Tm 3+ nanoparticles provide a candidate framework for UC systems with tunable short-wavelength spectra to expand their applications in the fields of photocatalysis.
研究领域:
材料科学
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光催化
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Yafei Wang,Chenhao Wang,Shen Yan,Yingchun Li,Chen Cai,Huiling Liu,Peng Ren,Mengmeng Wang,Shaoping Kuang
To reduce the adverse effects of antibiotics and antibiotic resistance genes (ARGs) in the environment, nitrogen-doped biochar (NLBH), derived from lincomycin fermentation dregs (LFD), was employed as an activator in a persulfate (PDS) oxidation system. The system was evaluated for its ability to degrade tetracycline (TC), inactivate antibiotic resistant bacteria (ARB) and remove ARGs. The degradation efficiency of TC in the NLBH/PDS system (70.1%) was higher than that in the pristine biochar/PDS system (10.3%). It was confirmed that the defects and edge pyridinic nitrogen generated in the nitrogen doping process were the reactive sites for PDS activation. According to electron paramagnetic resonance (EPR) and radical quenching experiments, the major mechanism for PDS activation was a non-radical pathway dominated by singlet oxygen ( 1 O 2 ). Radical pathways involving sulfate (SO 4 · - ) and hydroxyl radicals (·OH) were also at play in the NLBH/PDS system, but their role was minor. TC was principally degraded by hydroxylation , demethylation, and decarboxylation , and within 90 min, the NLBH/PDS system effectively inactivated 71.5% of ARB ( Pseudomonas sp. HLS-6). Intracellular ARGs (iARGs; sul 1, sul 2) and intI 1 had log reduction efficiencies of 2.73–4.04 and 2.70, respectively, whereas, extracellular ARGs ( sul 1 and sul 2) and intI 1 accumulated noticeably by 1.52–4.18-and 4.92-log, respectively. This work highlights a promising alternative technique for the removal of antibiotics, ARB and iARGs in future advanced wastewater treatment systems.
研究领域:
环境科学
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化学工程
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微生物学
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废物管理
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Weixuan Guo,Sixiang Zhuang,Ying Peng,Yi Shen,Yungui Li,Suorong Zhang,Qile Fang
Designing high-performance heterostructure catalysts for peroxymonosulfate (PMS) activation is a promising research area. PMS-driven organic pollutant degradation via radical pathways usually suffers from the interference of other coexisting matters. In this study, we took a source design approach and employed a self-templating strategy using Prussian blue analog (PBA) precursors to fabricate CoFe/C heterostructure catalysts dominated by a nonradical pathway. Slow-speed coordination renders the CoFe PBA precursor with a highly ordered crystal structure and fewer coordinated water, resulting in an ideal carbon-encapsulated CoFe bimetallic catalyst (CoFe-S-T) with more high-valence metals and a graphitized carbon layer in its heterostructure; the obtained catalyst is proven to have superior catalytic performance for tetracycline (TC) degradation through a nonradical pathway in PMS-driven oxidation . The high Co III /Co II ratio and surface oxygen content make CoFe-S-T an excellent catalyst by boosting the generation of 1 O 2 , which is the predominant active species. In addition, CoFe-S-T has a high proportion of graphitized carbon layers, which significantly improves the direct electron transfer pathway. Thus, utilizing precursor design in a self-templating strategy is an effective method to synthesize high-performance heterostructures for PMS-driven organic pollutant degradation.
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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催化
✓ 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）