COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Zewei Liang,Jing Wen,Yuanliang Zhou,Tingting Liu,Jinmei Dong,Weixin Zheng,Chenggong Chang,Xueying Xiao,Qiyuan Liu,Xiaogang Zheng
BiOCl 0.5 X 0.5 (X = F, Br, and I) heterojunctions were prepared via the solvothermal approach to achieve the solar-light induced photodegradation of tetracycline hydrochloride (TCH). The photocatalytic activity of BiOCl coupling with BiOI is greatly affected by the molar ratio of Cl/I. The best photocatalytic efficiency of 97.9 % within 120 min is obtained by flower-like BiOCl 0.5 I 0.5 microspheres with a Cl/I molar ratio of 1:1, and the removal efficiency of TCH over BiOCl 0.5 I 0.5 declines to 93.2 % after five cycles. Compared with BiOCl 0.5 Br 0.5 and BiOCl 0.5 F 0.5 , BiOCl 0.5 I 0.5 presents the better photocatalytic activity . Z-scheme junction between BiOCl and BiOI is favorable for the efficient separation and migration of photo-generated charge carriers, and the narrow band-gap structure of BiOCl 0.5 I 0.5 microspheres favors the visible-light harvesting.·O 2 - plays a vital role in BiOCl 0.5 I 0.5 -assisted photocatalytic reaction. However, the change in valance states induced by photo-corrosion is responsible for the solar-light deactivation of BiOCl 0.5 I 0.5 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Rui Zhang,Ziyin Chen,Yu Li,Chen Zhao,Lu Cai,Junrong Yu,Ze Yang,Jiacheng Jiang
The unique properties of MOFs make them the best candidates for catalytic and photocatalytic applications. In this research, the NH 2 -UiO-66 material was prepared by solvothermal method , and different content of NH 2 -UiO-66 was added before the composite growth of Bi 2 S 3 and BiOBr nanomaterials to obtain the NH 2 -UiO-66/BiOBr/Bi 2 S 3 ternary composite material. In order to investigate the relationship between the structure and properties of the catalyst, XRD , FT-IR, SEM , HRTEM , UV–vis DRS, XPS and other characterization technologies were used to analyze the structure, morphology, optical properties of the samples, showing that NH 2 -UiO-66/BiOBr/Bi 2 S 3 have been successfully synthesized. Their photocatalytic performance was evaluated based on the photocatalytic degradation of tetracycline hydrochloride and rhodamine B under visible light . The results show that 2% NH 2 -UiO-66/BiOBr/Bi 2 S 3 has better photocatalytic activity than other materials. Moreover, NH 2 -UiO-66/BiOBr/Bi 2 S 3 also demonstrated good photocatalytic reusability and stability. The formation of Bi 2 S 3 and BiOBr heterojunctions and the introduction of NH 2 -UiO-66 with more active sites increase the carrier performance and separation efficiency. Then the valence band and conduction band values of the semiconductor material are calculated through the M-S curve, combined with the forbidden bandwidth deduced by UV–vis DRS and the experimental results of radical trapping, a double Z-type electron transfer mechanism suitable for this system is inferred. Finally, taking RhB as an example, the degradation path of dye pollutants was studied.
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
Catalysts
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2022
·Vol. 12
·期 7
·774
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IF 4.501
Wei Qian,Wangtong Hu,Zhifei Jiang,Yongyi Wu,Zihuan Li,Zenghui Diao,Mingyu Li
In recent years, with the large-scale use of antibiotics, the pollution of antibiotics in the environment has become increasingly serious and has attracted widespread attention. In this study, a novel CDs/g-C3N4/BiPO4(CDBPC) composite was successfully synthesized by a hydrothermal method for the removal of the antibiotic tetracycline hydrochloride (TC) in water. The experimental results showed that the synthesized photocatalyst was crystalline rods and cotton balls, accompanied by overlapping layered nanosheet structures, and the specific surface area was as high as 518.50 m2/g. This photocatalyst contains g-C3N4and bismuth phosphate (BiPO4) phases, as well as abundant surface functional groups such as C=N, C-O, and P-O. When the optimal conditions were pH 4, CDBPC dosage of 1 g/L, and TC concentration of 10 mg/L, the degradation rate of TC reached 75.50%. Active species capture experiments showed that the main active species in this photocatalytic system were holes (h+), hydroxyl radicals, and superoxide anion radicals. The reaction mechanism for the removal of TC by CDBPC was also proposed. The removal of TC was mainly achieved by the synergy between the adsorption of CDBPC and the oxidation of both holes and hydroxyl radicals. In this system, TC was adsorbed on the surface of CDBPC, and then the adsorbed TC was degraded into small molecular products by an attack with holes and hydroxyl radicals and finally mineralized into carbon dioxide and water. This study indicated that this novel photocatalyst CDBPC has a huge potential for antibiotic removal, which provides a new strategy for antibiotic treatment of wastewater.Keywords:carbon dots;photocatalysis;graphitic carbon nitride;bismuth phosphate;tetracycline hydrochloride
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Wen Xiao,Huan Yu,Chenghao Xu,Zhongyi Pu,Xiangyu Cheng,Fang Yu,Chao Liu,Qinfang Zhang,Zhigang Zou
Developing high-efficiency photocatalysts for tetracycline hydrochloride (TCH) degradation is of great significance to ecosystems and human beings. In this work, a two-step process of exfoliation and re-stacking was performed to prepare re-stacked HTiNbO 5 nanosheets (R-HTNS) and then coupled with Ti 3 C 2 MXene to construct Ti 3 C 2 MXene/R-HTNS (MX/RTS) with a 2D/2D Schottky heterojunction. These 2D/2D heterostructures between Ti 3 C 2 MXene and R-HTNS can produce an internal electric field and provide maximum interface area for efficient charge transfer across the intimate interface. The photocatalytic performance of samples was evaluated by TCH degradation under simulated sunlight. The MX/RTS composites, with an optimal sample of 3-MX/RTS, show enhanced photocatalytic activity for TCH degradation compared with R-HTNS. The characterization results reveal that the introduction of Ti 3 C 2 MXene can significantly increase specific surface area for providing more reactive sites and broaden the light absorption region. Besides, the incident light energy is absorbed by the Ti 3 C 2 MXene component in MX/RTS composites to generate photothermal energy (heat), which facilitates the charge carrier separation and surface reaction kinetics. Thus, the enhanced TCH photodegradation activity for MX/RTS composites is due to the introduction of Ti 3 C 2 MXene, which possesses the synergistic effect of the increased specific surface area, improved light-harvesting capacity, 2D/2D Schottky heterojunction, and photothermal energy effect. Additionally, the TCH photodegradation behavior is deliberated with a detailed discussion on various coexisting ions. During TCH photodegradation, the active radical species are determined for 3-MX/RTS. According to the characterization results, the possible TCH photodegradation pathway and mechanism over 3-MX/RTS are explored. This work may offer a novel insight for constructing MXene-based heterostructured photocatalysts with high efficiency.
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
Journal of Environmental Sciences
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2023
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IF 6.9
Man Yang,Zhenzhen Shi,Shaodong Sun,Bian Yang,Jie Cui,Jianing Li,Daqin Yun,Nian Lei
Developing heterojunction photocatalyst with well-matched interfaces and multiple charge transfer paths is vital to boost carrier separation efficiency for photocatalytic antibiotics removal, but still remains a great challenge. In present work, a new strategy of chloride anion intercalation in Bi 2 O 3 via one-pot hydrothermal process is proposed. The as-prepared Ta-BiOCl/Bi 24 O 31 Cl 10 (TBB) heterojunctions are featured with Ta-Bi 24 O 31 Cl 10 and Ta-BiOCl lined shoulder-by-shouleder via semi-coherent interfaces. In this TBB heterojunctions, the well-matched semi-coherent interfaces and shoulder-by-shoulder structures provide fast electron transfer and multiple transfer paths, respectively, leading to enhanced visible light response and improved photogenerated charge separation. Meanwhile, a type-II heterojunction for photocharge separation has been obtained, in which photogenerated electrons are drove from the CB (conduction band) of Ta-Bi 24 O 31 Cl 10 to the both of bilateral empty CB of Ta-BiOCl and gathered on the CB of Ta-BiOCl, while the photogenerated holes are left on the VB (valence band) of Ta-Bi 24 O 31 Cl 10 , effectively hindering the recombination of photogenerated electron-hole pairs. Furthermore, the separated electrons can effectively activate dissolved oxygen for the generation of reactive oxygen species (·O 2 − ). Such TBB heterojunctions exhibit remarkably superior photocatalytic degradation activity for tetracycline hydrochloride (TCH) solution to Bi 2 O 3 , Ta-BiOCl and Ta-Bi 24 O 31 Cl 10 . This work not only proposes a Ta-BiOCl/Bi 24 O 31 Cl 10 shoulder-by-shoulder micro-ribbon architectures with semi-coherent interfaces and successive type-II heterojunction for highly efficient photocatalytic activity, but offers a new insight into the design of highly efficient heterojunction through phase-structure synergistic transformation strategy.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
Journal of Industrial Textiles
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2023
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IF 3.2
Xu Yang,Sarkodie Bismark,Dengbing Wang,Zuyi Liu,Yun Tao,Ziwei Sun,Xu Han,Quan Feng
Antibiotics released in the water pose a serious threat to human and ecological health. Therefore, it is of great importance to effectively remove antibiotics from wastewater. In this study, recyclable bacterial cellulose/sodium alginate/zeolitic imidazolate framework-8 (BC/SA/ZIF-8) aerogel composites were prepared by chemical cross-linking and in situ growth in freeze-drying. The successful preparation of the composite aerogel was confirmed by scanning electron microscope (SEM), Fourier Transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. The results reveal that BC/SA/ZIF-8 aerogel composite has significantly high BET specific surface area of 165.24 m2/g than that of BC/SA at 7.39 m2/g. The BC/SA/ZIF-8 composite aerogel exhibited excellent adsorption performance for tetracycline hydrochloride, with a maximum adsorption capacity of 746.27 mg/g. The adsorption process followed the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Moreover, the reusability test on BC/SA/ZIF-8 composite aerogel revealed an insignificant decline in adsorption after six cycles. Therefore, BC/SA/ZIF-8 composite aerogel has a high potential as a novel and recyclable adsorbent for efficient removal of tetracycline hydrochloride from water.
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
Journal of Environmental Sciences
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2023
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IF 6.9
Xiuying Liu,Qianna Xia,Jiao Zhou,Bowen Li,Shuaiqi Zhao,Long Chen,Aimal Khan,Xiaoxia Li,Aihua Xu
The design of efficient heterogeneous catalysts in bicarbonate-activated hydrogen peroxide systems (BAP) is a hot topic in wastewater treatment. In this work, Cu 2 O nanoparticles with different morphologies including cubic shape (c-Cu 2 O), octahedron shape (o-Cu 2 O) and spherical shape (s-Cu 2 O), were applied in BAP for the first time to degrade tetracycline hydrochloride (TC). Compared with Cu 2+ ions and CuO, TC degradation was boosted in the presence of Cu 2 O in the BAP system, with the degradation rate following the order c-Cu 2 O > o-Cu 2 O > s-Cu 2 O. The morphology-dependent effects could be linearly correlated with the ratio of surface oxygen species (O S ), but not with the surface area or Cu(I) ratio. The c-Cu 2 O catalyst with exposure of (100) facets contained 76.6% O S as the active site for H 2 O 2 adsorption and activation, while the value was much lower for o-Cu 2 O and s-Cu 2 O with dominant (111) facets. The presence of HCO 3 − enhanced the interactions among Cu 2 O, H 2 O 2 and TC, leading to facile oxidation of Cu(I) to Cu(II) by H 2 O 2 , and the formation of various reactive species such as hydroxyl radicals and Cu(III) contributed to TC degradation. This work provides a new method for enhancing H 2 O 2 activation with heterogeneous catalysts by crystal facet engineering.
研究领域:
环境科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Feng Zhang,Xiaodong Zhang,Pengyu Han,Jiali Cui,Chaoxu Wang,Qibin Chen
In this study, Pt@MOF(Fe)/NF, which was successfully employed as the cathode in the investigation of electrochemical activation of persulfate (PDS) for degradation of tetracycline hydrochloride (TCH), was successfully prepared by loading Fe-MOF and Pt on NF substrate using hydrothermal method. The loading of Fe-MOF and Pt increases the active site as well as the charge transfer ability, endowing the materials with high catalytic activity. The results revealed a synergistic reinforcing effect in the electrochemical activation of PDS, and the strong oxidizing substances generated by the activation of PDS on the cathode surface facilitated the degradation of TCH. The main active substances are SO 4 − . and OH . , primarily ·OH. The optimal degradation conditions include a current density of 20 mA/cm 2 , an initial concentration of PDS of 5 mmol/L, and an initial pH of 7. The degradation rate of TCH in the activation of PDS based on Pt@MOF(Fe)/NF reached 77.2 % after 120 mins of degradation under the optimal conditions, 32.7 % higher than that of the NF cathode system. In the degradation process of TCH, its characteristic functional groups are attacked and destroyed by active substances such as SO 4 − . and OH . , producing intermediates with structures similar to TCH, followed by further mineralization.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yun Wang,Dan Wang,Qixuan Mu,Yanke Zhai,Jun Hai,Yibing Ji,Ruijun Li
Laccase is utilized as green catalyst in the environmental catalysis. Nevertheless, the drawbacks such as poor stability and difficulty in recycling have seriously restricted its application. Here, we simulated the binding pocket and catalytic active site of nature laccase, and designed a laccase-mimicking nanozyme (named as GA-Cu and the average diameter was 600 nm) with high activity and stability by using Cu 2+ as the active center, 2-aminoimidazole as well as glutathione (GSH) as the ligand. Compared with natural laccase, the GA-Cu nanozymes showed excellent stability and reusability under extreme conditions. Furthermore, to overcome the problems of difficult recycling and easy secondary contamination, we innovatively proposed to load GA-Cu nanozymes onto nylon membranes (GA-Cu@CS/GA-Cu/nylon membranes) by vacuum-assisted filtration using chitosan (CS) as a binder to degrade tetracycline hydrochloride (TC) by filtration. Encouragingly, 50 mg/L of TC was almost completely removed by filtration once at 0.15 MPa pressure. The results have showed that the GA-Cu@CS/GA-Cu/nylon membrane removed TC mainly through degradation, and more than 80 % of TC was degraded through desorption experiments. Finally, some degradation products were identified by LC-MS and three possible degradation pathways were proposed. These findings demonstrate the potential of GA-Cu@CS/GA-Cu/nylon membrane for environmental remediation, and will be a general and important strategy for the design of membrane filters based on the excellent performance of nanozyme.
研究领域:
环境科学
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生物催化
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材料科学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2017
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IF 4.217
Junlei Zhang,Zhen Ma
Novel Ag 3 VO 4 /Bi 2 WO 6 heterojunctions were developed by in situ growing Ag 3 VO 4 particles onto Bi 2 WO 6 nanosheets. Ag 3 VO 4 /Bi 2 WO 6 heterojunction with an optimal Bi 2 WO 6 /Ag 3 VO 4 mass ratio of 10% exhibited much higher activity in the photocatalytic degradation of aqueous dyes and tetracycline hydrochloride under visible light ( λ > 400 nm) irradiation than Ag 3 VO 4 , Bi 2 WO 6 , or a mechanical mixture of Bi 2 WO 6 and Ag 3 VO 4 . The heterojunction catalyst also had good recyclability. The upgraded photocatalytic activity is attributed to the formation of nanojunction between Ag 3 VO 4 and Bi 2 WO 6 . Photogenerated holes and superoxide radical anion are mainly responsible for the photocatalytic activity.
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
Particuology
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2024
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IF 4.1
Hailong Fu,Xue Song,Yongde Liu,Jie Zhang,Jihong Zhao,Feiyue Wang,Zeying Zhang,Zengchen Su,Han Zhang
In this study, a method for preparing activated carbon (AC) from wheat dust (WD) was developed to achieve efficient removal of tetracycline hydrochloride (TCH). The AC, prepared through response surface methodology with a carbonization temperature of 590 °C, a NaOH to WD ratio of 4:1, and an activation temperature of 800 °C, exhibited a high specific surface area of 2821.58 m 2 /g. It demonstrated a remarkable TCH removal capacity of 1414.65 mg/g in aqueous solution. The AC retained an adsorption capacity of 1035.36 mg/g after five cycles and maintained over 80% of its adsorption capacity in different water bodies. The adsorption of TCH by AC, primarily controlled by surface sites through chemical and physical interactions, involved mechanisms such as pore-filling, electrostatic interactions, hydrogen bonding, π-cation interactions, and π-π interactions. This study highlights the potential of WD in preparing effective adsorbents, providing valuable insights for the comprehensive utilization of similar byproducts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Xuanqi Hao,Xiao Zhang,Chenchen Liu,Ping Yang
Metal element doping often can improve the photoluminescence (PL) of carbon dots (CDs). In this paper, blue and green emitting CDs (BCDs and GCDs) were synthesized by using phenylenediamine as the carbon and nitrogen sources. Cu-doped CDs (Cu-CDs) were fabricated by using copper acetylacetone as a precursor. The PL peak wavelengths of sample Cu-doped blue CDs (Cu-BCDs) and green CDs (Cu-GCDs) were 450 and 543 nm, respectively. The full width at half maximum of PL spectra were 67.31 and 93.13 nm, the PL quantum yields (PLQYs) were 13.6 and 38.7 %, and the average fluorescence lifetimes were 4.34 and 20.97 ns, respectively. The PL intensity of the Cu-CDs samples was enhanced with the photostability, and thermal stability test results showed that the Cu-CDs samples also had excellent stability. The Cu-BCDs and Cu-GCDs were employed in the field of sensing applications due to their excellent selectivity towards Cr (VI) and tetracycline hydrochloride (TC) detection. The detection limits for Cr (VI) and TC using Cu-BCDs were 0.34 and 0.86 μM, while Cu-GCDs showed detection limits of 0.47 and 0.50 μM, respectively, demonstrating the broad application prospect for Cu-CDs in sensing applications.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）