JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jian Wang,Changchun Chen,Zhihao Zhao,Cheng Cheng,Zhonghai Tang,Zhou Du,Yifeng Wang,Lin Pan
Considerable attentions are currently paid to water pollution, which seriously threats human health. Semiconductor catalysts with step-like (S-scheme) heterojunction are often used for degrading organic pollutants in water bodies due to their high carrier separation efficiency, high redox capacity, and broad light absorption capacity. In this paper, a novel S-scheme N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) heterojunction composite is synthesized for photodegradation of organic pollutants. The structural measurements indicate that the NH 2 -MIL-125(Ti) nanoparticles are intimately anchored on the surface of porous N-doped g-C 3 N 4 nanosheets . The experimental characterizations as well as the DFT theoretical calculation for samples demonstrate that the N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) composites not only bear larger specific surface area providing abundant reactive sites, but also improve the separation efficiency of photogenerated carriers during photodegradation. In addition, the degradation rate of RhB solution catalyzed by 25 wt% N-doped g-C 3 N 4 /NH 2 -MIL-125(Ti) (25 wt% NCM) attains the highest degradation rate (96.4%) under visible light irradiation. Moreover, the mineralization of RhB solution and intermediates produced in the degradation process are analyzed by total organic carbon (TOC) and high- performance liquid chromatography (HPLC) tests, respectively. Electron paramagnetic resonance (EPR) with free radical capture measurements show that the photodegradation of RhB is mainly ascribed to the superoxide radicals (·O 2 - ) and hole (h + ). This study provides an effective method to construct S-scheme heterojunction photocatalysts and apply them to wastewater treatment.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Boyuan Tu,Kaifu Yu,Dengjiang Fu,Li Zhou,Ruixiang Wang,Xinying Jiang,Huanhuan Liu,Xin Cao,Xiang Gong,Rong He,Yongjian Tang,Tao Chen,Wenkun Zhu
Photo-assist uranium extraction from fluorine-containing uranium wastewater by building semiconductor-plasma material heterostructure is a forward-looking strategy, which not only effectively accelerates F-U separation via the LSPR effect but also impacts the intensity of binding between U (VI) and site. Here, we developed an amino-rich Ag-NWs/NH 2 -MIL-125(Ti) (AgNW/N-M(Ti)) hybrid nanowires with LSPR effect for photo-assist uranium extraction. Accordingly, the AgNW/N-M(Ti) hybrid nanowires presented 90.4% removal efficiency for U(VI) without a sacrificial agent at the U: F molar ratio of 1:20. By virtue of In-situ KPFM, we identify hot electrons generated over AgNW were transferred to amino-rich N-M(Ti) to efficiently reduce the U(VI) adsorbed on the N-M(Ti), which effectively enhances the excellent uranium removal performance of AgNW/N-M(Ti) hybrid nanowires. This strategy may open a paradigm for the development of advanced heterojunctions with the LSPR effect as catalysts for photo-assisted uranium extraction from fluorine-containing uranium wastewater.
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Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 13
·2889-2899
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IF 5
Jiaqi Wang,Hongyang Huo,Guozhe Sui,Shuang Meng,Dongxuan Guo,Shanshan Fu,Dantong Zhang,Xue Yang,Jinlong Li
The development of visible-light-active photocatalysts with high performance has been regarded as a promising way to address environmental wastewater issues. In this work, a highly efficient g-C3N4/CdS/TiO2 ternary Z-type heterojunction photocatalyst with a hollow structure has been fabricated using a step-by-step self-assembly strategy, which demonstrates excellent photocatalytic performance under visible light and removes various water-soluble organic pollutants effectively. The photocatalytic degradation efficiency of 20-g-C3N4/CdS/TiO2-10 against rhodamine B (RhB) is found to be 29.8 times higher than that of the pristine g-C3N4 within 90 minutes of visible light irradiation attributed to the active species of ˙O2− and h+. Liquid chromatography mass spectrometry results suggest that the degradation pathway of RhB involves main steps such as N-de-ethylation, chromophore cleavage, ring opening, and mineralization. A series of characterization analyses, combined with the observed enhanced photocatalytic performance, indicate that the g-C3N4/CdS/TiO2 ternary heterojunction benefits from the rapid transport and separation of photogenerated carriers facilitated by the formation of a heterointerface. Furthermore, the g-C3N4/CdS/TiO2 ternary heterojunction exhibits favorable stability, with 88.1% degradation efficiency after five cycles of degradation experiments. This work provides novel insights into the preparation and application of ternary heterojunctions with superior photocatalytic performance for eliminating organic pollutants from wastewater.
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OPTICAL MATERIALS
·
2022
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IF 3.754
Yang Wang,Sheng Feng,Changchang Ma,Yun Zhou,Zhiwei Ye,Xiaojun Dai,Xun Cao
In this paper, a novel Mn-doped CdS@NH 2 -MIL-125(Ti) (MC@NT) photocatalytic composites was synthetized through hydrothermal method . Hydrogen desorption and tetracycline and oxytetracycline degradation were performed under visible light to test their photocatalytic activities . The composites were characterized by XRD , FTIR, SEM, TEM, XPS , UV–Vis diffuse reflectance spectroscopy (DRS), EPR , EIS, and transient photocurrent response. From the characterization consequence, it could be seen that Mn-doped CdS was tightly attached to the surface of tetragonal NT in the form of nanoparticles . The MC@NT composites exhibited more promising catalytic activity than pristine monomeric materials. The photocatalytic hydrogen evolution rate reached 3.61 mmol g −1 h −1 . Within 110 min, the degradation efficiencies of TC and OTC were 90% and 88%, respectively. The free radical trapping experiments proved that ·O 2 − and h + were decisive role for degrading pollutants in the degradation catalysis process. Radical trapping experiments and electron spin resonance (ESR) indicated that the Z-scheme heterojunction was formed between Mn-doped CdS and NT, leading to facilitate the migration and shift of photogenerated carriers and holes. Cycling experiments showed that the as-prepared composites have good stability and have good prospects for practical applications. We believe this work will offer new ideas on the future development of efficient heterojunction catalysts for light energy conversion and other applications.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 26
·68691-68700
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IF 5.8
Liu Yuhao,Wang Jieqi,Wang Xuyi,Chen Jiayue,Zhang Beibo,Chen Liping,Zheng Dan,Cheng Ming
It is a great challenge to develop photocatalysts for the degradation of organic pollutants in the aqueous environment, especially those with excellent catalytic performance under visible light conditions. In this work, using graphene oxide (GO) as an electron shuttle agent and carrier, a hybrid of ZIF-8/NH 2 -MIL-125(Ti) and GO (ZIF-8/NH 2 -MIL-125(Ti)/GO) was prepared by a simple two-step solvothermal method. The morphology, structure, and combination of the synthesized catalysts were studied. The results showed that graphene oxide and ZIF-8 formed an in situ load on NH 2 -MIL-125(Ti). The construction of hybrid materials significantly improved the catalytic activity of NH 2 -MIL-125(Ti) in the visible light range. The degradation activity of the synthesized catalyst was further tested with reactive red dye. The results showed that the catalyst exhibited excellent catalytic removal efficiency for active red, with a degradation rate of 99.8% within 2 h. The prepared hybrid materials have good application prospects in the field of organic pollutant treatment in water. Graphical Abstract
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Shiyu Zhang,Meng Du,Zipeng Xing,Zhenzi Li,Kai Pan,Wei Zhou
Defective-rich and electron-rich mesoporous NH 2 -MIL-125(Ti)@ZnIn 2 S 4 /CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn 2 S 4 , as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of ∼877.0 m 2 g −1 and a narrow band gap of ∼1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g −1 h −1 and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xingping Fu,Qianqian Chen,Ye Zhang,Feng Yu,Junjie Pan,Xiaobing Yang
The overuse of antibiotics, coupled with inadequate wastewater treatment, has led to widespread environmental contamination, posing significant risks to ecosystems and public health. In this study, a novel BiOCl/Bi 2 MoO 6 /MIL-125(Ti) heterojunction catalyst featuring a Z -scheme and II-type dual-functional junctions was prepared via a two-step solvothermal method and employed for the degradation of tetracycline (TC). The synthesized samples were thoroughly characterized by XRD, SEM, BET, TEM, and UV–vis spectroscopy. The results indicate that the incorporation of BiOCl and Bi 2 MoO 6 effectively tunes the band structure of MIL-125(Ti), enhancing its visible-light absorption. Moreover, the formation of the heterojunction interfaces significantly suppresses recombination of photogenerated charge carriers, thereby improving photocatalytic performance. Under visible-light irradiation, the BiOCl/Bi 2 MoO 6 /MIL-125(Ti) catalyst generates reactive radicals (·OH and ·O₂ − ), enabling efficient degradation of TC with a removal efficiency of 95.71 %. The synergistic effect of the Z -scheme and II-type heterojunctions plays a crucial role in the efficient photocatalytic degradation of TC. This study provides new insights into the degradation mechanisms of bifunctional heterojunctions and presents a promising strategy for designing high-performance photocatalysts for tetracycline degradation.
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JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Shijie Xing,Zhikun Li,Jiaxiang Liu,Wei Zhang,Fuqiang Sun,Shu-Xuan Liang
To address the ongoing issue of quinolones (QNs) residues in aquatic products, accurate and sensitive detection of trace QNs has always been necessary and urgent. In this work, a composite material of NH 2 −MIL-125(Ti)@TpBD(SO 3 H) 2 consisting of metal organic frameworks and based on bisulfonic acid-based covalent organic frameworks was synthesized and applied as a dispersive solid-phase extraction (dSPE) adsorbent. Combining with liquid chromatography-tandem mass spectrometry, a simple and effective method for simultaneous detection of 18 QNs in aquatic products was established. Meanwhile, the selective adsorption mechanism was thoroughly investigated through material characterization combined with density functional theory calculations. The results showed that the method had a good linear relationship ( r ≥ 0.9981), low limits of detection of 0.0019–0.0641 μg kg⁻¹, along with high recovery rates in the range of 80.6–113.2 %, and good precision with relative standard deviations less than 8.8 %. The selective adsorption mechanism revealed the synergistic adsorption mechanism of electrostatic interactions, hydrogen bonding, and π-π interactions. The material had good reusability and excellent stability. In summary, the dSPE method based on NH 2 −MIL-125(Ti)@TpBD(SO 3 H) 2 composites provided a practical sample pretreatment solution for the determination of trace QNs in complex matrixes.
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