CHEMOSPHERE
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2024
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IF 8.1
Zhilin Xu,Wenyue Dong,Xu Cui,Qian Duan
Three-dimensional donor-acceptor (D-A) type conjugated porous polymers (CPPs) was designed and synthesized via imine condensation of copper tetraaminoporphyrin (CuTAPP) as donor and 1,3,5-tris-(4-formyl phenyl) triazine (TFPT) as acceptor, named as CuPT-CPP. The CuPT-CPP possesses a high specific surface area (73.7 m 2 /g) and excellent photophysical properties. The simultaneous introduction of the organometallic molecules and D-A structures in CuPT-CPP could be broadened the visible-light response range (400–800 nm) and facilitated efficient photogenerated carrier separation and transportation. As heterogeneous photocatalysts , CuPT-CPP has excellent photocatalytic performances under visible light irradiation , leading to excellent model pollutant rhodamine B degradation efficiency up to about 100% in 3 h, it has superb stability and reusability during the photocatalytic processes, and CuPT-CPP also exhibited broad substrate adaptability, which could photocatalytic degradation of methylene blue (MB), methyl orange (MO), and tetracycline hydrochloride (TC). This work indicates that three-dimensional D-A type porphyrin- and triazine-based CuPT-CPP has great potential in the practical application of photocatalysis .
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Jiayi Wang,Penggang Ren,Ying Zhang,Zihang Cai,Zhengyan Chen,Yanling Jin,Zhengzheng Guo
BiOI is a promising photocatalyst due to its exceptional visible light response and high absorption coefficient; however, its performance is hindered by the rapid recombination of electron-hole (e − -h + ) pairs. Herein, a 2D/3D BiOI/g-C 3 N 4 S-scheme heterojunction catalyst was designed and constructed through the alkali etching strategy and subsequent microwave-assisted hydrothermal strategy. The abundant surface active sites and matched band gap of g-C 3 N 4 prepared through alkali etching facilitates anchoring of BiOI nanosheets, contact with contaminants and construction of heterojunctions. 2D/3D S-scheme heterojunction substantially promote electron-hole (e − -h + ) pairs separation and transfer. Profited from their synergistic effects, the 2D/3D BiOI/g-C 3 N 4 heterojunction delivers superior photocatalytic activity toward four different types of pollutants: methylene blue (91.7 %), tetracycline (91.9 %), eosin y (90.9 %) and methyl orange (97.7 %), and demonstrates excellent cyclic stability after seven methylene blue cyclic degradation experiments. Furthermore, BiOI/g-C 3 N 4 has shown satisfactory practicability in many simulation experiments, such as coexisting cations, different pH and real water. A feasible strategy to prepare a visible-light-driven multidimensional coordinated S-scheme heterojunction photocatalyst is provided in this work.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
SOLAR ENERGY
·
2020
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IF 4.608
Jianhua Hou,Qian Dou,Ting Jiang,Jin Yin,Junli Liu,Yuanyuan Li,Geshan Zhang,Xiaozhi Wang
Bismuth oxychloride (BiOCl) has great potential as a photocatalytic material. It is worthy to improve its photocatalytic performance by a simple and feasible method. In this work, withered cattail is carbonized directly at 800 ℃ in nitrogen atmosphere to obtain cattail carbon with good conductivity, which could be a good acceptor of photogenerated electrons. Through the one-step facile co-precipitation route with stirring at room temperature followed by the treatment of acetic acid, ultrathin nanosheets of BiOCl were synthesized and grew on the surface of cattail carbon. The BiOCl/cattail carbon composites have well-contacted heterojunction interface, hierarchical structure, high specific surface area and enhanced utilization of visible light, which allow the composites to separate the photogenerated electron-holes efficiently. Thus the BiOCl/cattail carbon composites could show excellent photocatalytic activity, which could remove rhodamine B completely within one hour under visible light. The degradation rate of the composite could achieve about 17 times higher than that of pure BiOCl. Mechanism test showed that both OH and h + active species could work together to degrade organic pollutants. Therefore, our work combines readily available and inexpensive biochar materials with BiOCl, which provides a strategy for the low-cost synthesis of efficient BiOCl-based photocatalytic materials that can be used in large-scale industrial production to be applied in the treatment of organic wastewater.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
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2021
·Vol. 232
·期 3
·1-14
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IF 2.52
Pan Yuwei,Bu Zhuoyu,Li Xiang,Han Jiangang
This study presented the efficient removal of tartrazine, a typical biorefractory dye, in a heterogeneous photochemical Fenton-like system adopting Fe 0 and oxalate (Ox) (UV/Fe 0 /Ox). Only 47.4% tartrazine could be removed within 60 min with a UV/Fe 0 system. The addition of Ox could significantly enhance the removal of tartrazine to 72.4% within only 20 min with the UV/Fe 0 /Ox system. The effects of various factors, such as the Fe 0 dose (0–0.8 g/L), Ox dose (0–2 mM), initial pH (2–6), and initial tartrazine concentration (2–30 mg/L), on the removal of tartrazine were examined. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and Mossbauer spectroscopy were conducted to explore the mechanism by which oxalate enhances the performance of the UV/Fe 0 system. Ox could inhibit the formation of iron (hydro)xides on the Fe 0 surface, thus guaranteeing the reactivity of Fe 0 during the reaction. Compared with Fe 2 O 3 , FeS, and Fe 3 O 4 , Fe 0 was a good heterogeneous iron catalyst for the photolysis of tartrazine with the Ox system. Compared with H 3 PO 4 , nitrilotriacetic acid, and ethylenediaminetetraacetic acid, Ox was also a good photolysis chelating agent. The UV/Fe 0 /Ox system could also maintain fast tartrazine removal after five consecutive runs without the addition of Fe 0 , indicating the good stability of Fe 0 .
研究领域:
环境科学
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化学工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 8
·20790-20803
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IF 5.19
Huang Hua,Tao Xin,Niu Zhirui,Shan Baoqin,Liu Yu,Ren Jingyu
To improve the photocatalytic performance of Mn 0.6 Zn 0.4 Fe 2 O 4 (MZFO) and ZnIn 2 S 4 (ZIS) for organic pollutants, the p-n MZFO@ZIS heterojunctions with different weight percentage (10 ~ 40%) of MZFO are constructed from spent batteries and added indium ion via a green bioleaching and hydrothermal method. Structural, optical, and photocatalytic properties for the heterojunctions are investigated systematically by XRD, FT-IR, SEM–EDX, TEM, BET, VB-XPS, UV–vis DRS, PL, etc. The results confirm that p–n junction significantly improves the visible light adsorption and the separation efficiency of photogenerated carriers. Specifically, MZFO-25%@ZIS shows the highest photodegradation performance toward Congo red (CR), and its reactive kinetic constant is about 9.6, 7.8, and 7.0 times higher than that of P25 TiO 2 , MZFO, and ZIS, respectively, and MZFO-25%@ZIS still possesses a high reusability and simple magnetic separation after 5 cycles of reuse. The radical trapping experiments and electronic paramagnetic resonance (EPR) tests show that · O 2 − , · OH, and h + are the most important active substance for degrading CR. The pathways for the CR degradation are further proposed based on the intermediate analysis. DFT + U calculations confirm that the high charge density of Zn–O, Fe–O, and Zn–S bonds in the MZFO and ZIS molecules provides the electrons for the sufficient production of free radicals. This work also provides a novel high value-added strategy for the green utilization of spent batteries.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2014
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IF 0
Wei Chen,Zhouli Chen,Tianyu Liu,Zhimin Jia,Xiaoheng Liu
Novel hybridization of g-C 3 N 4 /Zn 0.28 Cd 0.72 S heterjunctions photocatalysts was successfully synthesized via the combination of chemisorptions and thermal post-treatment, wherein the g-C 3 N 4 serves as substrates to provide sites to anchor the Zn 0.28 Cd 0.72 S nanorods . These nanostructured g-C 3 N 4 /Zn 0.28 Cd 0.72 S composites were extensively characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), ultraviolet–visible diffuse reflection spectroscopy (UV–vis-DRS) and X-ray photoelectron spectrometer (XPS). The UV–vis-DRS results revealed that absorption spectral range of hybrid composites is a monotonous enhancement with the increasing Zn 0.28 Cd 0.72 S concentration in the visible light region. Interestingly, the catalytic performance of the g-C 3 N 4 /Zn 0.28 Cd 0.72 S is strongly dependent on the loading of Zn 0.28 Cd 0.72 S. The photocatalytic results demonstrate that 70 wt% g-C 3 N 4 /Zn 0.28 Cd 0.72 S hybrid photocatalyst exhibits the highest efficiency for the degradation of RhB and 4-ABA pollutants under visible light irradiation. And cycling photocatalytic tests for photocatalytic decomposition of RhB also indicate this photocatalyst is stable enough. The Fermi level ( E F ) and band position calculations reveal that g-C 3 N 4 and Zn 0.28 Cd 0.72 S are well-matched overlapping band structure, which may be in favour of enhanced separation rate of holes and electrons for reason of the development of heterogeneous interface. The interfacial charge transfer process was further verified in the photoreaction system of g-C 3 N 4 /Zn 0.28 Cd 0.72 S on the basis of VB-XPS and photoluminescence spectra (PL) analysis.
研究领域:
材料科学
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环境科学
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DOI
CATALYSIS TODAY
·
2018
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IF 4.667
Xiaoyan Zhang,Jinfei Zhou,Da-Peng Yang,Shaoyun Chen,Jiale Huang,Zibiao Li
Diatom frustules with hierarchical structures have been widely investigated in many fields due to their unique optical features, excellent mechanical resistance and extraordinarily intricate pore patterns. Herein, Cu 2-x S modified diatomite has been successfully fabricated for the first time via a mild method at room temperature. The Cu 2-x S nanoparticles with diameters of 50–100 nm were uniformly distributed on the diatomite. The as-prepared Cu 2-x S-diatomite (Cu 2-x S-DE) exhibits excellent photocatalytic degradation efficiencies for MB and MO, which reach to 99.1% and 96.9% respectively in 40 min under the irradiation of UV–vis light with 20 mg photocatalyst. The degradation mechanism of the organic pollutant over the Cu 2-x S-DE/H 2 O 2 reaction system was also proposed. This work provides an effective strategy to design and prepare of the diatom-based nanomaterials with efficient photocatalytic degradation activity, which is of great value for the environmental applications.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2020
·
IF 5.715
Shan Chen,Xiudan Liu,Shiyuan Gao,Yanchao Chen,Longjun Rao,Yuyuan Yao,Zhiwei Wu
CuCo 2 O 4 was synthesized via a relatively simple method, and innovatively supported onto the activated carbon (AC) by calcination to obtain a novel heterogeneous catalyst (AC-CuCo 2 O 4 ). Brilliant red 3BF (3BF) was selected as the probe compound to investigate the catalytic activity of AC-CuCo 2 O 4 in the presence of peroxymonosulfate (PMS). The results showed that 98% removal rate could be achieved and the reaction rate constant (0.476 min −1 ) was 5.2 times greater than that of CuCo 2 O 4 alone (0.091min −1 ), suggesting that the introduction of AC could greatly enhance the catalytic activity of pure CuCo 2 O 4 . Typically, the 3BF removal was as high as 96% after five cycles, showing the good stability of catalyst reuse. Additionally, the effects of the initial pH, catalyst dosage, PMS concentration and reaction temperature on the 3BF removal were investigated, demonstrating that AC-CuCo 2 O 4 effectively remove 3BF over a wide pH range (5.0–10.0) and possessed temperature-tolerant performance. To further explore the 3BF removal mechanism, electron paramagnetic resonance technology combining with trapping agents was employed to confirm the involvement of reactive oxygen species including SO 4 •− , • OH, O 2 •− and 1 O 2 , which distinctly differed from the reported CuCo 2 O 4 for PMS activation . These findings provided an addition promising strategy in environmental remediation.
研究领域:
环境科学
·
催化化学
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Shuaishuai Man,Dehui Luo,Qing Sun,Haifeng Yang,Hebin Bao,Ke Xu,Xuzhong Zeng,Miao He,Zehao Yin,Li Wang,Zhihong Mo,Wenjing Yang,Xueming Li
Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment . Herein, high conductive MXene (Ti 3 C 2 T x ) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO 2 electrode. The well-conducted Ti 3 C 2 T x interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO 2 (EPD time was 2.0 min) electrode with the charge transfer resistance decreased by 9.51 times, the inner active sites increased by 5.21 times and the ∙OH radicals generation ability enhanced by 4.07 times than the control EPD-0/PbO 2 anode. Consequently, the EPD-2.0/PbO 2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO 2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti 3 C 2 T x middle layer could also be used to fabricate other efficient and stable anodes, such as SnO 2 , MnO 2 , TiO 2 , etc.
研究领域:
环境科学
·
材料科学
·
电化学
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jingting Su,Junyi Xia,Huijun Liang,Jun Xiao,Ruohu Zhang,Shuhong Xu,Li Zhu
Amorphous materials have recently garnered significant interest due to their low-cost fabrication methods, extensive surface area and plentiful surface defects , which offer numerous active sites for catalytic reactions . However, carriers self-trapping and recombination caused by bulk defects limit the employment of amorphous materials as photocatalysts . As such, it is essential to adjust the structure and defects to improve carriers utilization for creating high-performance amorphous photocatalysts. In this study, we developed a novel and facile strategy to fabricate a quasi-2D amorphous crepe-like TiO x -Au (cTiO x -Au) photocatalyst, in which the cTiO x was synthesized simply through one-step hydrolysis method at room temperature by constructing discrete reaction system with mass-confinement of the precursor to guide the morphology of the cTiO x . The removal efficiencies of the cTiO x -Au to antibiotic tetracycline (TC) and gaseous pollutant formaldehyde (HCHO) under visible light were 84.43 % and 95.92 %, respectively, which greatly surpassed those of its counterparts, normal amorphous TiO x (amTiO x )-Au (54.32 % and 73.67 %) and crystalline catalyst TiO 2 -P25-Au (49.29 % and 54.03 %). The remarkable visible-light photocatalytic capacity of cTiO x -Au can be attributed to the unique quasi-2D morphology of cTiO x . The ultrathin nanostructure not only maximizes surface defects and minimizes bulk defects, but also effectively shortens the carriers transport time and reduces recombination probability, on the other hand, it provides ample adsorption sites and accessible binding sites for plasmonic Au nanoparticles to amplify the effect of surface plasmon resonance enhancement. The excellent photocatalytic performances of cTiO x -Au for removing both aqueous and atmospheric pollutants endow it great potential in real environmental remediation applications.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xiaochen Yu,Xiao He,Xu Zhang,Yadi Peng,Pengfei Zhao,Ziqiao Zhang,Yifan Liu,Lingcheng Zhang,Peng Zhao
Element doping strategies are commonly employed to achieve effective photocatalysts. In this work, a novel form of P and Ce co-doped g-C 3 N 4 nanosheets was synthesized using a one-step thermal polymerization technique, exhibiting remarkable efficiency in the degradation of organic pollutants under visible light. The prepared catalysts underwent comprehensive characterization through XRD, FT-IR, SEM, TEM, BET, XPS, UV–vis, PL, and electrochemical testing. The electronic and optical properties of the catalysts were further elucidated using first-principles density functional theory (DFT). In the photocatalytic experiment of degrading Rhodamine B (RhB), the photocatalytic ability of g-C 3 N 4 nanosheets was improved at different degrees, among which g-C 3 N 4 nanosheets co-doped with P and Ce showed the highest photocatalytic activity, with a degradation efficiency of 90.58 % for RhB. Furthermore, the photocatalytic mechanism was confirmed through free radical capture experiments. This study presents a novel approach for the development of efficient photocatalysts to remove pollutants.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Dongfang Hou,Qian Zhu,Junjie Wang,Min Deng,Xiu-qing Qiao,Bojing Sun,Qingwen Han,Ruan Chi,Dong-Sheng Li
Optimized fabrication of Z-scheme photocatalyst based on MOF materials offers sustainable energy generation and environmental improvement due to their attractive properties. The Z-scheme heterojunctions consisting of UiO-66 cubes covered with Zn 0.5 Cd 0.5 S nanoparticles were fabricated by a facile solvothermal method. Thanks to the Z-scheme carrier transport under simulated sunlight irradiation, UiO-66@Zn 0.5 Cd 0.5 S exhibited enhanced photocatalytic performance of H 2 generation synchronized with organic pollutant degradation in fluoroquinolone antibiotic wastewater. Synergistically, the highest comprehensive performance was obtained in ciprofloxacin solution. The H 2 yield reached 224 μmol∙ g −1 ∙ h −1 and simultaneously the removal efficiency was up to 83.6 %. The degradation pathways revealed that the process of piperazine ring cleavage and decarboxylation also generates H protons, further promoting the production of H 2 . Therefore, the effective spatial separation and transfer of the photoinduced carriers are attributed to the good band structure, large specific surface area, and cooperative reduction and oxidation reactions of UiO-66@Zn 0.5 Cd 0.5 S, resulting in significant photocatalytic activity. The toxicity assessment of antibiotics and intermediate products during the photocatalytic reaction also verifies the reduction of environmental risk. This study highlights a promising way to expand the application of the MOFs-based photocatalyst in clean energy conversion coupling with water remediation.
研究领域:
材料科学
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环境科学
·
能源科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）