ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 24
·66303-66313
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IF 5.8
Xu Zhimin,Ju Shaohua,Gao Peng,Lin Junjian,Niu Yifan,Meng Fei,Li Shunling,Li Fangfang,Du Jiahao,Xu Li,Peng Hongbo,Pan Bo
In this study, ferrous composites (Fe x O 4 ) were prepared by microreactor to activate peroxydisulfate (PDS) for the degradation of bisphenol A (BPA) with visible (Vis) light irradiation. X-ray diffraction (XRD), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) were used to characterize the morphology and crystal phase of Fe X O 4 . Photoluminescence (PL) spectroscopy combined with amperometric tests were used to determine the role of PDS on the performance of photocatalytic reaction. The main reactive species and intermediates for BPA removal were determined by electron paramagnetic resonance (EPR) measurement and quenching experiments. The result indicated that singlet state oxygen ( 1 O 2 ) contributed more to the BPA degradation than that of other reactive radicals (·OH, SO 4 ·− and ·O 2 − ); these reactive radicals and 1 O 2 formed by the reaction between photo-generated electrons (e − ) and holes (h + ) of Fe x O 4 and PDS. During this process, the consumption of e − and h + also improved their separation efficiency and thus enhanced the degradation of BPA. In addition, the photocatalytic activity of Fe x O 4 in Vis/Fe x O 4 /PDS system was 3.2-fold and 6.6-fold higher than that of single Fe x O 4 and PDS under Vis light, respectively. The Fe 2+ /Fe 3+ cycle could effectively drive the photocatalytic activation of PDS through indirect electron transfer and the formation of reactive radicals. This work illustrated that the degradation of BPA was rapidly in Vis/Fe x O 4 /PDS system mainly through 1 O 2 , which further improve our understanding on the efficient removal of organic contaminants in the environment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zheng Lian,Ting Wu,Xining Zhang,Shuangfei Cai,Youlin Xiong,Rong Yang
Advanced oxidation processes (AOPs) based on photocatalysis and peroxymonosulfate (PMS) activation have shown potential in antibiotics degradation by generating series of reactive oxygen species (ROS). However, construction of AOP materials with easy preparation and high reusability is still a challenge. Herein, we prepared a Mo 2 C/MoO x thin film through one-step chemical vapor deposition (CVD), and this film could synergistically promote PMS activation and visible-light photocatalysis due to the redox cycles of multiple Mo valence states and staggered bandgap structures of Mo-based components in the film. The generated oxygen species (mainly 1 O 2 radical, accompanying by other ones involving OH, SO 4 − and O 2 − radicals) could efficiently degrade the uneasily degradable antibiotics, tetracycline (TC), with a removal efficiency of 91.7 % within 60 min. Meanwhile, the film could maintain the TC degradation capability for at least 10 cycles, exhibiting promising reusability. The work could provide feasible approaches to develop easily prepared AOP thin film materials for antibiotic pollutant degradation.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Yanli Zhang,Meixue Zhao,Xu Li,Qingping Xin,Xiaoli Ding,Lizhi Zhao,Hui Ye,Ligang Lin,Hong Li,Yuzhong Zhang
The incorporation of porous nano-fillers into mixed matrix membranes (MMMs) has a great impact on CO 2 separation. In this study, a series of F-Ln (Ln is the Light Lanthanide, Ln = La, Ce, Pr, Nd) nanosheets with mesoporous structure was fabricated as a filler in Pebax®1657 matrix to improve the performance of CO 2 separation. F-Ln nanosheets are uniformly distributed in the membrane and the mesoporous structure can construct multiple channels for CO 2 fast transport in Pebax/F-Ln MMMs. The pore diameter of nanosheet is in order: F-La > F-Ce > F-Pr > F-Nd, and the smaller pore diameter of nanosheets is beneficial to improve the CO 2 separation performance. In humidified conditions, Pebax/F-Nd-6 MMMs show optimum separation performance among MMMs, and the CO 2 permeability is up to 1265 Barrer and CO 2 /CH 4 selectivity is 36.7, which are 2.3 times and 1.9 times higher than pure Pebax and approaches 2019 upper bound. Meanwhile, to demonstrate the potential universal applicability of F-Ln nanosheets in CO 2 separation, XLPEO/F-Ce MMMs were fabricated to separate CO 2 /N 2 and the performance exceeds the 2019 upper bound. The efficient CO 2 separation performance of 2D F-Ln nanosheets with mesoporous structure in membranes reveals the potential application of these nanosheets in industrial CO 2 separation.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 18
·4569-4578
·
IF 4.3
Li Meng Xiao,Kang Kai Wen,Huang Min,Cheng Ru,Wang Wei,Gao Jie,Wang Jian
Tyrosinase (TYR), as an important biological enzyme, has been widely used in synthetic biology, medical hairdressing, environmental detection, biological sensors, and other fields. In clinical practice, tyrosinase activity is an important indicator for detecting melanoma. Therefore, the detection of tyrosinase activity is of great importance. Based on the polyphenol oxidase activity of tyrosinase, a simple and rapid detection method was proposed based on the adjustable light scattering properties of cobalt hydroxyl oxide nanoflakes (CoOOH NFs). It was found that the amount and size of CoOOH NFs decreased due to the redox reaction mediated by catechol (CC), resulting in a lower light scattering signal of CoOOH NFs. However, in the presence of tyrosinase, catechol was oxidized to a quinone structure, resulting in the reduced decomposition of CoOOH NFs and recovered light scattering signal, which was developed for the quantitative detection of tyrosinase activity. It was found that in the range of 10–400 U/L, the light scattering intensity was correlated linearly with tyrosinase activity, and the limit of detection was 6.71 U/L (3 σ / k ). To verify the feasibility of the proposed method in clinical samples, the spiked recovery experiments were carried out with human serum samples, which showed recovery rates between 93.0% and 104.6%, suggesting the high accuracy. The proposed assay provides a simple and rapid method for detection of a natural enzyme based on the adjustable light scattering properties of CoOOH nanoflakes, which lays the foundation for the development of various enzyme sensing applications in the future. Graphical abstract
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Feiran Jia,Qing Liu,Liyan Xie,Zhishan Luo,Jianhui Huang,Yingying He,Lirong Qiu
The use of heterojunctions with Z-scheme photocatalysts holds great promise for enhancing the photocatalytic degradation efficiency of antibiotics. In this study, we report the construction of a novel heterostructure by in-situ growth of the ultrathin polymeric carbon nitride (PCN) on the electrospun Bi 2 WO 6 nanofibers for improved photocatalytic tetracycline (TC) degradation under visible light. Our gas–solid reaction strategy enables the formation of uniform and intimate junctions between the PCN nanosheets and the Bi 2 WO 6 nanofibers, resulting in a well-contacted interface that remarkably accelerates the separation and transfer of the photogenerated charge carriers. The optimized PCN/Bi 2 WO 6 photocatalyst exhibits a significant TC degradation rate of 89.5 % under visible light, which is 1.4-fold and 2.0-fold of the pure PCN and Bi 2 WO 6 photocatalysts, respectively. Our innovative design philosophy opens up a new horizon for the development of efficient Z-scheme heterostructured photocatalysts for antibiotic degradation.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 20
·6799-6803
·
IF 4
Jiayue Hao,Ran An,Yao Li,Ke Wang,Shuyan Song,Jing Feng,Xinyu Wang,Hongjie Zhang
Organic–inorganic metal hybrid halides (OIMHs) as a new kind of photoelectric material have gained much attention in recent years because of their excellent performance in solid-state lighting applications. However, the preparation of most OIMHs is complex and requires a long preparation time in addition to the solvent providing the reaction environment. This greatly limits their further applications. Here, we synthesized zero-dimensional lead-free OIMH (Bmim)2InCl5(H2O) (Bmim = 1-butyl-3-methylimidazolium) by a facile grinding method at room temperature. Through Sb3+ doping, Sb3+:(Bmim)2InCl5(H2O) shows a bright broadband emission centered at 618 nm under UV excitation, which could be attributed to the self-trapped exciton (STE) emission of Sb3+ ions. To explore their ability in the field of solid-state lighting, a white-light-emitting diode (WLED) device based on Sb3+:(Bmim)2InCl5(H2O) with a high color rendering index of 90 was fabricated. This work enriches In3+-based OIMHs and provides a new direction for the simple fabrication of OIMHs.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Mei Cai,Bin Du,Anze Shui,Chao He
The photodegradation of pollutants is a significant and friendly technology to protect the environment. The fabrication of hierarchical heterojunction is the efficient method to improve the photocatalytic performance. Herein, the hierarchical type-II BiOBr@ZnIn 2 S 4 heterojunction is fabricated successfully via a simple chemistry method. The optimal sample BS170 (the volume of 170 mL ethylene glycol) exhibits the higher photodegradation under the visible light and presents 2.3 times higher than that of pure BiOBr for degradation of MO and the mass of BS170 is the half of BiOBr could achieve the same photocatalytic effect as BiOBr for the photodegradation of RhB. The results indicate the fabric of heterojunction could enhance the absorption capacity of visible light and separation efficiency of photoinduced electron-hole pairs to increase the photodegradation. Therefore, this work provides the novel strategy for fabricating the hierarchical type-II heterojunction photocatalyst for the degradation of dyes.
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RSC Advances
·
2023
·Vol. 13
·期 8
·5208-5218
·
IF 3.9
Thi Viet Ha Luu,Ngoc Nhiem Dao,Hoang Ai Le Pham,Quang Bac Nguyen,Van Cuong Nguyen,Phuc Huu Dang
In this work, Ta-doped ZnO (Ta-ZnO) nanomaterials were synthesized by the hydrothermal method at different temperatures (110, 150, and 170 °C) for the photodegradation of methylene blue (MB) under visible light. Ta doping significantly affects the crystal defects, optical properties, and MB photocatalytic efficiency of ZnO materials. The optical absorption edge of Ta-ZnO 150 was redshifted compared to undoped ZnO, correlating to bandgap narrowing (EgTa–ZnO = 2.92 eV; EgZnO = 3.07 eV), implying that Ta doped ZnO is capable of absorbing visible light. Besides, Ta-doping was the reason for enhanced blue light emission in the photoluminescence spectrum, which is related to the oxygen defect V0O. It is also observed in the XPS spectra, where the percentage of oxygen in the oxygen-deficient regions (O531.5 eV) of Ta-ZnO150 is higher than that of ZnO150. It is an important factor in enhancing ZnO's photocatalytic efficiency. The MB degradation efficiency of Ta-doped ZnO reached the highest for Ta-ZnO 150 and was 2.5 times higher than ZnO under a halogen lamp (HL). Notably, the influence of hydrothermal temperature on the structural, morphological, and photoelectrochemical properties was discussed in detail. As a result, the optimal hydrothermal temperature for synthesizing the nanorod is 150 °C. Furthermore, photocatalytic experiments were also performed under simulated sunlight and natural sunlight. The nature of the photo-oxidative degradation of MB was also investigated.
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Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 5
·1650-1659
·
IF 7
Lina Wang,Zhiping Wan,Xiaoxiang Xu,Jun Qian
Semiconductor heterostructures are of critical importance in steering the flow of photocarriers (i.e. e− and h+). Here, we have fabricated heterostructure-based semiconductor fibers comprising electrospun In2O3 nanofibers coaxially wrapped by CaIn2S4 nanofoils. The hybrid fibers are characterized by a strong interplay between CaIn2S4 and In2O3, enabling fast photocarrier separation to generate copious reactive species for disinfection. When illuminated by visible light (λ ≥ 400 nm), the hybrid fibers deliver exceptionally high photocatalytic activity for bacterial inactivation (7 log-reduction in viable cell count for 20 min), well-outcompeting the parent compounds, CaIn2S4–In2O3 mixtures, and many active photocatalysts reported. The hybrid fibers are type-II semiconductor heterojunctions in nature that can enrich photogenerated e− and h+ at the different components of the hybrid fibers. This work justifies the importance of semiconductor heterostructures in guiding photocarrier flows and offers a paradigm for the design of semiconductor hybrid fibers in the area of photocatalytic bacterial inactivation.
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CELLULOSE
·
2022
·Vol. 30
·期 3
·1841-1855
·
IF 6.123
Shuaib Suhaib Shuaib Adam,Niu Zixuan,Qian Zhiyi,Qi Shengyang,Yuan Weizhong
The development of phase change materials (PCMs)-based energy storage devices for both thermal and light energy has the potential to greatly enhance solar energy use efficiency, which is important in addressing the worldwide energy problem. Due to the environmentally friendly, good thermal and chemical stability, easy degradation, and good mechanical strength of ethyl cellulose, it was used to fabricate the shape-stabilized composite phase change material (ss-CPCM) with polyethylene glycol. The ss-CPCMs have a high latent enthalpy (174.33 J/g), high form stability, excellent thermal regulation abilities for both thermal energy storage and thermal insulation, and great cycle thermal performance. After adding long afterglow luminescence particles, the self-luminous ss-CPCMs were obtained. They can absorb and store visible and ultraviolet light, as well as emit green light in the dark for an extended period of time. The excellent properties of the self-luminous ss-CPCMs promise them great potential in applications, such as energy-saving, emergency lighting, furniture, smart building, and smart highway.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 19
·2215032
·
IF 19
Meng Fan,Jinpeng Huang,Lyudmila Turyanska,Zhenfeng Bian,Liancheng Wang,Chunyang Xu,Nan Liu,Hongbo Li,Xiaoyu Zhang,Chengxi Zhang,Xuyong Yang
Metal halide perovskite quantum dots (QDs) have emerged as potential materials for high brightness, wide color gamut, and cost-effective backlight emission due to their high photoluminescence quantum yields, narrow emission linewidths, and tunable bandgaps. Herein, CsPbX 3 /SBA-15 nanocomposites are prepared with outstanding optical properties and high stability through an in situ growth strategy using mesoporous silica particles. According to finite-difference time-domain simulations, the mesoporous structure provides a strong waveguide effect on perovskite QDs and the uniform dispersion suppresses reabsorption losses, improving the overall photoconversion efficiency of perovskite QDs. The as-fabricated perovskite monochromatic light-emitting diode (LED) has a maximum luminous efficiency of 183 lm W −1 , which is the highest for monochromatic perovskite LEDs reported to date. A further benefit of this work is that the white devices, which combine the green and red perovskite nanocomposites with commercial blue LED, exhibit a high luminous efficiency of 116 lm W −1 and a wide color gamut (125% for NTSC and 94% for Rec. 2020) with coordinates of (0.33,0.31).
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mingwei Shen,Guoqing Zhang,Jiayou Liu,Yuhang Liu,Jiayuan Zhai,Haochuan Zhang,Hesheng Yu
Photocatalysis has been widely employed as a promising method for wastewater treatment. However, existing studies are primarily conducted in batch reactors. To the best of our knowledge, a continuous reactor has not been used to degrade xanthate residual in mineral beneficiation wastewater. In this work, a continuous fixed-bed photoreactor (CFPR) was first designed, and Bi 2 WO 6 photocatalysts coated on silica sands were used to degrade sodium isobutyl xanthate (SIBX) under visible light irradiation. The effects of various parameters, including catalyst loading, pH level, initial SIBX concentration, wastewater flow rate, calcium ion (Ca 2+ ) concentration, magnesium ion (Mg 2+ ) concentration, and zinc ions (Zn 2+ ), on the degradation efficiency, were systematically investigated. The results show that the photodegradation percentage of SIBX increases with increasing catalyst loading, decreasing initial concentration, and decreasing flow rate within the scope under investigation. Additionally, low concentrations (30 mg·L −1 ) of Ca 2+ and Mg 2+ ions favor the photodegradation of SIBX, whereas excessive Ca 2+ and Mg 2+ ions (240 mg·L −1 ) inhibit photocatalytic activity. The presence of Zn 2+ ions inhibits photodegradation percentage. Furthermore, the photodegradation percentage is slightly higher at alkaline than at acidic pH. The maximum degradation percentage reached 95.40 % after 70 min of visible light irradiation under optimal conditions. In addition, a fixed bed reactor model considering surface reaction kinetics and mass transfer constraints was established by combining the Langmuir-Hinshelwood (L-H) kinetic equations and the series resistance theory. This model can accurately estimate the intrinsic kinetic parameters and can well predict degradation efficiency with a root-mean-square-error (RMSE) of 4.24 %. Finally, the bottleneck for improving the performance of the reactor can be identified under different conditions.
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