APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2022
·Vol. 128
·期 9
·1-10
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IF 2.983
Wu Xiang-Feng,Fu Yun-Xuan,Chang Tian-Long,Jia Yun-Ning,Shang Jia-Lu,Wang Hui,Fan Zi-Hao,Wang Chen-Xu,Su Jun-Zhang,Ci Li-Jie
Bi nanoparticles were used to fabricate Bi/Bi 2 O 3 heterojunction by an in situ sintering method in a muffle furnace. The experimental results show that the surface plasmon resonance (SPR) effect and oxygen vacancy (OV) defects of Bi/Bi 2 O 3 hybrids can enhance the visible-light absorption and carrier separation efficiency, and thus improve the photocatalytic activity of Bi/Bi 2 O 3 composites for tetracycline (TC) degradation under visible-light illumination. Moreover, by means of increasing the calcination time of Bi nanoparticles, the photocatalytic degradation efficiency of the as-prepared hybrids shows a tendency of first increasing and then decreasing. When the calcination time was 15 min, a maximum value of 81.7% was reached within 60 min. This is higher than that of 16% of the pristine Bi nanoparticles. In addition, h + plays a major role during the degradation reaction of TC. This study can provide promising guide for the rational design and development of Bi-based photocatalysts and degradation of antibiotics under solar light illumination.
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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纳米技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Mingjie Cai,Yanping Liu,Kexin Dong,Chunchun Wang,Shijie Li
S-scheme heterojunction structure can endow the photocatalysts with high-performance photo-degradation of pharmaceuticals and personal care products (PPCPs) since it can remain the photogenerated electrons/holes with stronger redox ability. Herein, an integrative S-scheme heterojunction photocatalyst building from Cd 0.5 Zn 0.5 S nanoparticles and BiOCl microflowers with oxygen vacancies (OVs) was developed. Moreover, the in-situ grown process ensures the firm contact and intense electron coupling between BiOCl and Cd 0.5 Zn 0.5 S. As a result, Cd 0.5 Zn 0.5 S/BiOCl exhibited a significant reinforcement of photo-activity and stability for the abatement of antibiotic norfloxacin, manifesting a 2.8-fold or 9.6-fold enhancement compared to pristine Cd 0.5 Zn 0.5 S or BiOCl. Cd 0.5 Zn 0.5 S/BiOCl also shows good resistance to alkaline, sodium salts and humic acid. The performance of Cd 0.5 Zn 0.5 S/BiOCl to photocatalytically degrade other PPCPs with different molecular structures was further confirmed. At last, the ability of Cd 0.5 Zn 0.5 S/BiOCl for PPCPs de-toxicity was verified by evaluating the toxicity of norfloxacin and its degradation intermediate. This study demonstrates a new S-scheme heterojunction photocatalyt for efficient removal of PPCPs as well as provides some insights into developing high-performance metal sulfide solid-solution-based S-scheme heterojunctions for water decontamination.
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
Nanomaterials
·
2023
·Vol. 13
·期 1
·216
·
IF 5.3
Wenxi Wang,Junjie Zhang,Zhiran Hou,Pei Chen,Xu Zhou,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao
Carbon nanotubes (CNTs) were considered a promising activator for persulfates due to their high electrical conductivity, large specific surface area and low toxicity. The functional groups and surface defects of CNTs could significantly affect their activation performance. In this study, CNTs with high C=O ratio and defect density (CNT-O-H) were prepared through a facile treatment of raw CNTs with HNO3oxidation followed by calcination at 800 °C under an argon atmosphere. X-ray photoelectron spectroscopy (XPS) and Raman results showed that the C=O proportion and defect degree (ID/IG) rose to 75% and 1.53, respectively. The obtained CNT-O-H possessed a superior performance towards peroxydisulfate (PDS) activation, and the degradation efficiency of tetracycline (TC) in the CNT-O-H/PDS system was increased to 75.2% from 56.2% of the raw CNTs/PDS system within 40 min. Moreover, the activity of CNT-O-H after use could be easily recovered with re-calcination. In addition, the CNT-O-H/PDS system exhibited high adaptabilities towards wide solution pH (2–10), common coexisting substances and diverse organic pollutants. Singlet oxygen (1O2) was confirmed to be the dominant reactive oxygen species (ROS) generated in the CNT-O-H/PDS system. It was inferred that surface C=O groups and defects of CNTs were the key site to activate PDS for TC degradation.Keywords:carbon nanotube;carbonyl group;surface defect;peroxydisulfate activation;singlet oxygen;tetracycline 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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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 4
·1-12
·
IF 2.8
Kang Ye-Wei,Fu Yun-Xuan,Liu Shu-Nan,Zhang Xue-Feng,Wang Hui,Yan-Li,Ma Xiao-Ye,Liu Lei,Wu Xiang-Feng
In 2.77 S 4 nanosheets were first synthesized and then used to construct the In 2.77 S 4 /COFs composite photocatalyst by an in situ hydrothermal growth method. The structure, optical properties, morphology, chemical composition and photo-generated carriers behavior of the as-synthesized In 2.77 S 4 /COFs composites were discussed, respectively. The tetracycline dilute solution was selected to evaluate its photocatalytic activity. Experimental results show that COFs can improve the photocatalytic activity and recyclability of In 2.77 S 4 under visible light irradiation. With the increase in COFs dosage, the photocatalytic efficiency of the as-synthesized composite samples is first increased and then decreased. When the amount of COFs is 10 wt%, the as-synthesized In 2.77 S 4 /COFs composite photocatalyst shows the maximum photocatalytic degradation efficiency of 93.8% in 90 min, which is higher than that of 75.1% of In 2.77 S 4 and 0.1% of COFs, respectively. Furthermore, the separation and migration efficiency of the photo-generated electron–hole pairs of the as-synthesized composite are improved in comparison of the pure samples and the transient photocurrent intensity of In 2.77 S 4 /COFs composite is about 2.5 times than that of pure In 2.77 S 4 and 10 times than that of pure COFs. In addition, holes play a major role during the photocatalytic degradation process.
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
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yifeng Zeng,Fan Wang,Dongqin He,Jianqiang Sun,Jun Li,Hongwei Luo,Xiangliang Pan
Bone char is a hydroxyapatite-rich product obtained by calcining animal bones. However, the role of inorganic hydroxyapatite is often overlooked in bone char-catalyzed persulfate systems. In this work, iron was doped into swine bone-derived biochar (Fe-BC) by simple impregnation, and the Fe-BC catalysts were used for the first time to activate peroxymonosulfate (PMS). The obtained Fe-BC/PMS system could rapidly degrade the target pollutants (0.0529 s −1 , 90 s) employing singlet oxygen ( 1 O 2 ) as the dominant reactive oxygen species (ROS). The characterization results demonstrated that iron was mainly intercalated into the catalyst by substituting calcium sites in swine bone biochar, and the Fe-BC composition was significantly affected by annealing temperature. A comprehensive study including quenching experiments, electron paramagnetic resonance (EPR), chemical probes, and linear sweep voltammetry (LSV) revealed that 1 O 2 was the dominant ROS. According to the characterization results, 1 O 2 was generated from the conversion of superoxide radical (O 2 •− ) and the self-dissociation of PMS. Iron was the main active site of Fe-BC catalysts, and the carbon defects and oxygen-containing groups also played roles in catalyzing PMS. The Fe-BC/PMS system exhibited outstanding oxidative capability over a wide pH range (3.0–9.0) and was resistant to interference from some high concentrations of anions (Cl − , NO 3 – , and SO 4 2− ). This work provides a new perspective on using animal bone-derived biochar catalysts in advanced oxidation processes.
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
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Ruijin Li,Danlian Huang,Yashi Chen,Guangfu Wang,Zhen Wei,Wei Zhou,Ruihao Xiao
Selective oxidation of vanillyl alcohol (VAL) to vanillin (VN) is a key step towards sustainable valorization of lignin biomass. The combination of Cu metal and TEMPO has been shown to be an effective catalytic system for the oxidation of alcohols to aldehydes. However, most previous studies have stayed in homogeneous catalytic systems, where the catalysts are difficult to recycle. In this study, Carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) were utilized as the substrate, and the carboxyl functional groups could provide partial ligands for MOFs (Cu 3 (BTC) 2 ), thus allowing MOFs to be encapsulated by MWCNTs. And the hydroxyl group of 4-OH-TEMPO could be dehydrated and condensed with the carboxyl group to graft with carbon nanotubes to form a multiphase catalytic system. The addition of carbon nanotubes improved the stability and thermal conductivity of the catalyst, which was beneficial to the catalytic conversion of VAL. Under the conventional oven heating, the conversion of VAL and the selectivity of VN could reach 98.33% and 91.37% at 120 ℃ for 2 h, respectively. And under microwave radiation , the complete conversion of VAL to VN could be achieved at 120 ℃ for 1 h. After five cycles, the efficiency of the catalyst could still reach more than 85%, which proved to be a stable and reusable integrated catalyst for the oxidation of VAL to VN.
研究领域:
化学工程
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材料科学
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催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Zhengkun Yu,Yunlei Zhou,Haowei Zhang,Miao Zhang,Rongyu Zhang,Huanshun Yin,Jun Wang
Bi 2 SiO 5 /CuBi 2 O 4 Z-Scheme heterojunction enriched with oxygen vacancies were prepared by a simple one-pot hydrothermal method. The photocatalytic activity of Bi 2 SiO 5 /CuBi 2 O 4 nanocomposites was evaluated under visible light irradiation using tetracycline, antibiotic-resistant Escherichia coli (AR E. coli ), and tetracycline-resistant genes as the target pollutants. The results showed that Bi 2 SiO 5 /CuBi 2 O 4 nanocomposites had the best photocatalytic activity, which could degrade 83.3 % of tetracycline within 2 h, completely inactivate AR E. coli within 2.5 h, and almost completely destroy tetracycline-resistant genes within 3 h. In addition, the scavenging experiments and ESR experiments not only showed that the active substances of O 2 - , h + and OH played a dominant role and 1 O 2 played a secondary role in the photocatalytic system of Bi 2 SiO 5 /CuBi 2 O 4 nanocomposites, but also confirmed that the Z-Scheme heterojunction was successfully constructed between Bi 2 SiO 5 and CuBi 2 O 4 . Oxygen vacancies were detected by EPR experiments. The formation of oxygen vacancies and Z-Scheme heterojunction enhanced the light absorption properties of the Bi 2 SiO 5 /CuBi 2 O 4 nanocomposites and improved the separation efficiency of the photogenerated electron-hole pairs compared to the single Bi 2 SiO 5 and CuBi 2 O 4 materials. This work showed that Bi 2 SiO 5 /CuBi 2 O 4 was a new and efficient photocatalyst for the removal of tetracycline, AR E. coli and tetracycline-resistant genes, which provided a feasible idea for the management of water environment pollution.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yuan Wei,Yubing Liu,Chao Liu,Xin Li,Kai Song,Runquan Wang,Wanping Chen,Guanghong Zhao,Ronghui Liu,Hongyu Wang,Gaofeng Shi,Guoying Wang
Graphitic phase carbon nitride (g-C3N4) demonstrates tremendous potential for photocatalytic degradation of organic pollutants, but its performance is severely limited by the high recombination of photogenerated electron–hole pairs. This study introduces an innovative approach oxalic acid-assisted thermal polycondensation to construct a series of oxygen-doped porous g-C3N4 (OCN) nanostructured materials, which simultaneously utilizes the heat-induced foaming mechanism of oxalic acid to achieve element doping modification. The results indicate that modified OCN-1.5 exhibited the optimal photocatalytic activity. Under visible light conditions, the degradation efficiency of OCN-1.5 catalyst toward bisphenol A (BPA, 30 mg L–1) reached 82.55% (240 min light irradiation). This represents a significant improvement of 60% compared to the traditional g-C3N4 catalyst. The mechanism is as follows: on the one hand, the doping of oxygen atoms alter the charge distribution and symmetry of g-C3N4, thereby enhancing the separation efficiency of photogenerated charge carriers. Furthermore, under visible light irradiation, it facilitates the formation of conjugated delocalized systems associated with e– and h+ on the surface, leading to an accelerated mineralization degradation of OCN and BPA at the interface. Additionally, the •O2– radicals generated from the interfacial reactions can also directly oxidize BPA simultaneously. On the other hand, the construction of a porous nanostructure provides a larger specific surface area and channels for the diffusion of charge carriers, thereby enhancing light capture and transfer. Moreover, this structure offers more active sites for the adsorption and degradation of pollutants. Therefore, the synthetic strategy proposed in this study overcomes the long-standing aggregation issue in the synthesis of g-C3N4, providing a perspective for the scalable preparation of high-performance g-C3N4 photocatalysts and the removal of organic pollutants.
研究领域:
材料科学
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环境科学
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化学
·
光催化
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Tianhao Zhang,Yuhang Bian,Luming Wang,Hui Zhao,Gang Wang,Chunshan Li
Herein, a novel continuous fixed-bed process for methacrolein (MAL) production via aldol condensation of formaldehyde with propionaldehyde over a sulfonic acid resin was developed, which exhibited high efficiency and remarkable catalytic stability. The influence of Brønsted acid strength and solvent permittivity on aldol reaction was revealed, and the optimal sulfonic acid resin (NKC-9) with suitable acid strength (H0 = 0.46) was identified. Meanwhile, the occupancy of water molecules on acid sites, which would lead to side reactions and catalyst deactivation, could be effectively inhibited through the construction of a liquid–solid catalytic system in non-polar media. The propionaldehyde conversion and MAL yield could reach up to 97.3 and 90.1% after optimization using the response surface method, respectively. Kinetic studies revealed that the surface reaction was the rate-limiting step with an activation energy of 57.1 kJ/mol. No deactivation behavior was observed for this kind of catalyst after 300 h on stream.
研究领域:
化学工程
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催化
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有机化学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Zhixia Wang
It has been shown that tropine-based ionic liquid surfactant (TILS) possesses exceptional biological, botanical, and pharmacological capabilities. Significantly, little research has been done on its essential characteristics, which are greatly influenced by its structural makeup. In this study, the essential properties, such as thermal stability, surface activity, foaming properties, and solubilization, were examined. The results demonstrate that the temperature stability of TILS was influenced by the nucleophilicity, coordination, and hydrophilicity of anions. Surface tension, solubility, and the HLB value of the TILS solution all worked together to affect the performance of the foam. The micellar and acid-base characteristics of TILS contributed to the solubilization of curcumin in its solution. The solubilization of curcumin in water was improved by TILS from 11 ng·mL −1 to more than 30 mgmmL −1 , an increase of at least 10 6 times. These positive and adaptable physical and chemical characteristics highlight TILS potential in a variety of industrial-related applications.
研究领域:
化学
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生物学
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药学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Yiping Feng,Jingyi Wu,Haijian Lu,Wenhao Lao,Hongda Zhan,Longyong Lin,Guoguang Liu,Yirong Deng
The widespread application of rare earth elements (REEs) has raised concerns about their potential release into the environment and subsequent ingestion by humans. Therefore, it is essential to evaluate the cytotoxicity of REEs. Here, we investigated the interactions between three typical REEs (La, Gd, and Yb) ions as well as their nanometer/μm-sized oxides and red blood cells (RBCs), a plausible contact target for nanoparticles when they enter the bloodstream. Hemolysis of REEs at 50–2000 μmol L −1 was examined to simulate their cytotoxicity under medical or occupational exposure. We found that the hemolysis due to the exposure of REEs was highly dependent on their concentration, and the cytotoxicity followed the order of La 3+ > Gd 3+ > Yb 3+ . The cytotoxicity of REE ions (REIs) is higher than REE oxides (REOs), while nanometer-sized REO caused more hemolysis than that μm-sized REO. The production of reactive oxygen species (ROS), ROS quenching experiment, as well as the detection of lipid peroxidation, confirmed that REEs causes cell membrane rupture by ROS-related chemical oxidation. In addition, we found that the formation of a protein corona on REEs increased the steric repulsion between REEs and cell membranes, hence mitigating the cytotoxicity of REEs. The theoretical simulation indicated the favorable interaction of REEs with phospholipids and proteins. Therefore, our findings provide a mechanistic explanation for the cytotoxicity of REEs to RBCs once they have entered the blood circulation system of organisms.
研究领域:
毒理学
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纳米技术
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生物医学工程
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 2
·e54774
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IF 3
Wenyu Zhang,Yu Zhang,Weijie Cai,Dazhi Wang,Shaoyin Zhang
2,2,6,6-Tetramethylpiperidinium-nitroxide (TEMPO) is a mild and efficient catalyst, which is important in the industrial production of selective oxidation of alcohols to the corresponding aldehyde or ketone compounds. However, it is a challenge to recover the expensive TEMPO catalyst in homogeneous catalytic systems. In this study, a novel polymer-supported catalyst was prepared using 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxy (4-OH-TEMPO) and polyaromatic ether sulfone (PAES). The successful grafting of 4-OH-TEMPO in PAES-C was demonstrated by 1 H nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared (FT-IR), load capacity can be calculated by elemental analysis (EA). BET and scanning electron microscopy (SEM) to depict the structure-performance relationship. Herein, SEM images revealed the existence of porous structure. This structure can effectively adsorb NO molecules to form a PAES-TEMPO/NO x catalytic system to selectively oxidize benzyl alcohol. The experimental results indicated the high activity, the subsequent benzyl alcohol oxidation cycle can reach more than 93% conversion without showing a large loss of selectivity. More importantly, the as-prepared catalyst exhibited the attractive recyclability (recovery rate is 98%). After 10 consecutive runs, no significant loss of conversion and selectivity was observed (the conversion rate of benzyl alcohol was more than 93% and the selectivity was more than 95%). This study might provide some recommendation on the development of highly efficient catalysts for alcohol oxidation.
研究领域:
化学工程
·
催化材料
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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）