JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhiwei Liang,Guiming Ba,Haiping Li,Na Du,Wanguo Hou
Non-metal doping is an effective strategy to enhance the photocatalytic performance of polymeric carbon nitride (CN), but silicon (Si) doping in CN has never been realized yet. Herein, Si-doped CN (CNSi) was firstly prepared via a simple calcination process, by using (NH 4 ) 2 SiF 6 as the Si source, and exhibits prominently enhanced photocatalytic activity in H 2 evolution from water splitting and for environmental purification. Its photocatalytic H 2 production rate under visible light irradiation is 2.24 mmol g −1 h −1 which is ∼3 times that of CN, with an apparent quantum yield reaching ∼7% at 420 nm. The photoactivity improvement of CNSi arises from its prominent increase in photoinduced charge separation and transfer efficiencies. The doping mechanism of Si in CN is well illustrated. CNSi exhibits a high chemical stability and also great potential for application in solar energy conversion and environmental remediation. This work provides a novel way to modify CN and paves an avenue for synthesizing other Si-containing CN photocatalysts .
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
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Longfei Zhang,Qi Zhang,Yunpu Wang,Xian Cui,Yuhuan Liu,Roger Ruan,Xiaodan Wu,Leipeng Cao,Lantian Zhao,Hongli Zheng
Microplastics (MPs) have already spread across the globe and have been found in drinking water and human tissues. This may pose severe threats to human health and water environment. Therefore, this study accurately evaluated the removal effect of metal-modified biochar on polystyrene microplastics (PS-MPs) (1.0 μm) in the water environment using a high-throughput fluorescence quantification method. The results indicated that Fe-modified biochar (FeBC) and Fe/Zn-modified biochar (Fe/ZnBC) had good removal efficiencies for PS-MPs under the dosage of 3 g/L, which were 96.24% and 84.77%, respectively. Although pore effects were observed (such as “stuck”, “trapped”), the electrostatic interaction was considered the main mechanism for the adsorption of PS-MPs on metal-modified biochar, whereas the formation of metal-O-PS-MPs may also contribute to the adsorption process . The removal efficiency of PS-MPs by FeBC was significantly reduced under alkaline conditions (pH = 9 and 11) or in the presence of weak acid ions (PO 4 3− , CO 3 2− , HCO 3 − ). A removal efficiency of 72.39% and 78.33% of PS-MPs was achieved from tap water (TW) and lake water (LW) using FeBC when the initial concentration was 20 mg/L. However, FeBC had no removal effect on PS-MPs in biogas slurry (BS) and brewing wastewater (BW) due to the direct competitive adsorption of high concentrations of chemical oxygen demand (COD). The findings of this study highlighted that metal-modified biochar had a potential application in purifying tap water or lake water which contaminated by MPs.
研究领域:
环境科学
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材料科学
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生态学
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DOI
PubMed
高影响因子
PLoS One
·
2020
·Vol. 15
·期 4
·e0231286
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IF 2.74
Chao Zeng,Mei Deng,Hao Qiao,Boming Tang,Yongjie Ding,Xuejuan Cao
The application of photocatalyst in pavements has received comprehensive attention in recent years due to its ability to decontaminate nitrogen oxides (NOx). However, it’s remarkable that NOx also accumulated extensively in parking lots. The purpose of this study is to develop a movable photocatalytic plate (remarked photocatalytic KT plates) coupled with high activity to purify NOx. Firstly, the type of photocatalytic KT plates was determined according to NO removal experiment in laboratory. Then the plates were employed in the parking lots for removing NOx. One sample T-test, normality test and paired sample T-test methods for NOx concentration variation were conducted to determine the appropriate comparative means of dates under both dark and illuminated conditions. The difference of NO X concentration between dark and illuminated conditions was obtained to evaluate the photocatalytic removal efficiency. The results indicated that NO removal efficiency in laboratory and parking lots were 51.31% and 9.2%, respectively.
研究领域:
环境科学
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材料科学
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城市规划
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Wenting Zhao,Huan Zhang,Qingdong He,Lei Han,Tianyang Wang,Fang Guo,Wenbo Wang
Converting naturally abundant Coal Gangue (CG) waste into new materials with special functions or excellent performance has always been desirable. Here, the new porous heterogeneous silicate@carbon composites with high specific surface area of 650.96 m 2 /g (52.88 times of CG), excellent adsorption and removal ability to cationic dyes were synthesized by a controllable one-pot reconstitution reaction process of calcined CG. The optimal composite adsorbent composed of 10.179% Mg and 0.35% carbon can adsorb 269.86 mg/g of Methylene blue (MB) and 504.91 mg/g of Basic Red 14 (BR), which are 29.2 and 28.6 times higher than that of original CG and calcined CG, respectively. The MB and BR dyes in 200 mg/L of the initial dye solution can be removed almost completely after adsorption with 2 g/L of the composite adsorbent, which is significantly superior to raw CG and calcined CG. The dynamic column adsorption curves indicate the adsorption equilibrium was attained at C / C 0 values of 0.78 (for MB adsorption) and 0.75 (for BR adsorption). The used adsorbent can be regenerated and reused for multiple cycles, and the removal efficiency of the adsorbent towards dye is still higher than 90% after 5 regenerations. The adsorption isotherms and adsorption kinetics were studied and the adsorption mechanism was explored. This study demonstrates a feasible way to achieve a sustainable cycle "from waste to environmental purification materials".
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bo Xue,Le Du,Junsu Jin,Hong Meng,Jianguo Mi
The development of a green, efficient, and reusable photocatalyst is of great importance for degradation of organic pollutants in water. Herein, MIL-88A@PA, a composite consisting of macroporous polyacrylate (PA) and metal organic frameworks (MOFs), was prepared by suspension polymerization, amine functionalization, and in-situ growth of MOFs. The nanosized MIL-88A of only 50–100 nm in diameter was reduced by approximately 90% owing to the control of heterogeneous nucleation and growth. More catalytic active sites were exposed and the photocatalytic activity of MIL-88A was significantly improved. The specific surface area of MIL-88A was increased from 132.79 to 219.78 m 2 /g owing to the decreased crystal size, and the corresponding degradation rate constant of Rhodamine B (RhB) was 9.4 times than that of pure MIL-88A. Under visible light irradiation, RhB could be completely degraded in 60 min using MIL-88A@PA with a loading amount of 45%. The degradation rate was still 97% after 5 cycles. The high photocatalytic activity of MIL-88A@PA can be attributed to the effective separation of photogenerated carriers, lower transfer resistance, and more active sites. The composite MIL-88A@PA material exhibits high stability and photocatalytic activity, which offers the potential in environmental cleaning.
研究领域:
环境科学
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材料科学
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化学工程
·
光化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tong Zhou,Guohui Dong,Jiahao Geng,Kai Han,Chenyang Xiao
In this study, a novel Z-scheme + II-type ternary heterojunction nanocomposite was prepared by one-step solvothermal method using g-C 3 N 4 , FeS 2 and Fe 2 O 3 as raw materials. The successful preparation of this ternary heterojunction was confirmed by the structural analysis and the surface morphology study. Compared with g-C 3 N 4 , the ternary photocatalyst showed excellent photocatalytic performance for the degradation of tetracycline (TC). The enhancement of photocatalytic activity is mainly due to the increase of light absorption capacity, effective separation of carrier in space, and increase of electron transfer channels in this Z-Scheme + II-type composite system. The scavenger test and electron spin resonance spectroscopy show that O 2 − is the main oxidizing free radical in the photocatalytic system. Based on liquid chromatograph-mass spectrometer, a possible degradation pathway of TC was proposed. This study opens up a new idea for the design and synthesis of efficient Z-Scheme + II-type photocatalysts for environmental purification.
研究领域:
环境科学
·
材料科学
·
化学
·
光催化
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Qing-rui Zeng,Zi-ang Jia,Xu Liu,Bo-wen Xiu,Jin-ping Cheng
The rational application of piezoelectric polarization properties in non-centrosymmetric heterojunctions to improve charge separation efficiency is a novel approach for enhancing their photoelectrocatalytic capabilities for environmental purification. Herein, a noval 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 multiple heterostructures with two types S-scheme heterojunctions was formed by multi-functional materials NaBi(MoO 4 ) 2 with Y 3+ ion-doping and multi-phase state (1T, 2H and 1T-2H) MoS 2 quantum dots multi-interface polarization engineering. Material characterization and DFT calculations revealed that 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 multiple heterostructures produce highly-efficient Bi-S-Mo(IV) and Mo(IV)-S-Mo(VI) charge-transfer channels induced by multi-interface polarization engineering. 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 heterostructures were developed as photoanodes using the pressed tablet stainless-steel mesh (PT-SSM) method, and demonstrated conspicuous piezoelectric-photoelectrocatalytic (PZ-PEC) efficiency (99.88% removal within 40 min) for the degradation of organic pollutant phosphodiesterase-5 inhibitor (PDE-5i) under visible light illumination, direct-current external bias and mechanical force. This work provides new insight for synergy and mechanism between piezoelectric effect and photoelectrocatalysis for environmental clean-up.
研究领域:
材料科学
·
环境科学
·
电化学
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2023
·
IF 5.8
Kaibo Xu,Liqin Cao,Zhouyu Wang,Liu-ping Chen
Hemoperfusion (HP) is one of the most prominent therapies for treating uremia, hyperbilirubinemia, and acute drug toxicity. The comprehensive performance of currently used porous HP adsorbents needs to be improved due to the impediment to their synthesis strategy. Herein, green carbon dioxide-in-water high internal phase emulsions (C/W HIPEs) were utilized and emulsified with poly(vinyl alcohol) (PVA) for the formation of a heparin-mimetic chitosan oligosaccharides/poly(acrylamide-co-sodium 4-styrenesulfonate) [COS/P(AM-co-SSS)] monolith, which exhibited good mechanical properties, stable swelling performance, hydrophilic properties, anticoagulant effect, and low hemolysis. It showed a strong toxin adsorption capacity (415.2 mg/g for creatinine, 199.3 mg/g for urea, 279.5 mg/g for bilirubin, and 160 mg/g for tetracycline). The adsorption process of porous COS/P(AM-co-SSS) followed the pseudo-second-order kinetic and Langmuir isotherm models. Moreover, the porous materials had a strong electrostatic force on creatinine. The removal of creatinine by simulated in vitro blood perfusion was 80.2% within 30 min. This work provides a green preparation strategy for developing novel HP materials, highlighting their potential application value in blood and environmental purification.
研究领域:
材料科学
·
生物医学工程
·
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Meng Xiaoyu,Zhao Huiru,Zhao Ajiao,Shi Xuan,Qiu Hua,Chen Kunlin
Functional textiles featuring odor adsorption, controlled release, and antibacterial properties have attracted considerable interest for applications in personal care and environmental purification. To address the limited stability and durability of native β-cyclodextrin (β-CD) in health-protective textile coatings, a chemically modified β-CD was synthesized using DPT as a functionalizing agent. The successful chemical modification of β-CD was validated through Fourier Transform Infrared (FT-IR) and Proton Nuclear Magnetic Resonance ( 1 H NMR) spectroscopy. These microcapsules were then applied to fabric coatings, endowing the textiles with multifunctional properties, including odor control and ultraviolet (UV) protection. The results demonstrated that increasing the modified β-CD content from 10 to 25% improved the adsorption rate of trans-2-nonenal from 23.97 to 64.48% at room temperature. Under UV irradiation, brominated diphenylthiophene acts as a photosensitizer that generates reactive radicals and enhances molecular activity, effectively degrading trans-2-nonenal via radical attack and photooxidation reactions. Additionally, the treated fabrics also exhibited significantly enhanced UV-shielding performance, achieving an UPF value of 73.5, which remained at 40.29 even after 30 abrasion cycles. These findings indicate the potential of modified β-CD microcapsules in creating durable, multifunctional textiles with superior sensory and protective capabilities. Graphical
研究领域:
材料科学
·
纺织工程
·
高分子化学
·
功能材料
·
环境净化
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2023
·
IF 0
Xiaoya Bu,Yan-gai Liu,Ci’an Xie,Baochen Wang
The long-afterglow luminescent material Sr2MgSi2O7:(Eu, Dy) was combined with the photocatalytic material g-C3N4 to construct a type of Sr2MgSi2O7:(Eu, Dy)/g-C3N4 self-luminous photocatalytic composite. This overcomes the limitation that photocatalytic experiments can only be carried out under an external light source, and it provides a more flexible way to use photocatalytic technology in environmental purification. The morphology, structure, luminescence, and photocatalytic properties of the samples were investigated using a variety of advanced characterization techniques. The results show that the significant improvement in the photocatalytic performance is attributed to the formation of a Z-scheme heterojunction between the luminescent and photocatalytic materials and the promotion of the photocatalytic reaction by the properties of the long-afterglow luminescent material itself. A possible mechanism for the photocatalytic process of the composite is proposed, and it is speculated that the reason for the increased photocatalytic activity is internal electron transfer and electron–hole pair separation based on tests such as X-ray photoelectron spectroscopy and density functional theory calculations. This study provides a strategy for enhancing the photocatalytic activity of photocatalysts and achieving round-the-clock degradation of pollutants.
研究领域:
材料科学
·
环境净化
·
光催化
·
纳米技术
✓ 已验证
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Chade Lv,Jingxue Sun,Gang Chen,Yansong Zhou,Danying Li,Zukun Wang,Boran Zhao
Tubular nanostructure becomes the researchful focus in environmental purification because of its unique features, however, the hollow fibrous BiVO 4 , famous as an efficient photocatalyst for water purification and oxidation, has not been achieved yet. Here, we employ organic vanadium salt to fabricate BiVO 4 nanotubes by single-spinneret electrospinning without template. The organic salt can induce electrospinning gradient effect which plays a key role in the achievement of tubular nanostructure . Benefit from the unique structural properties of tubular nanostructure , BiVO 4 nanotubes possess hollow interior, leading to strong light harvesting ability and large surface areas. For photocatalytic reduction of Cr(VI), these contributions from tubular nanostructure could promote the photocatalytic performance relative to solid BiVO 4 nanofibers. This organic salt induced electrospinning gradient effect is not subject to the usage amount, ratio and kind of as-employed salt, endowing the electrospinning method with bright vista for the fabrication of other materials with tubular nanostructure.
研究领域:
材料科学
·
纳米技术
·
环境净化
·
光催化
✓ 已验证
DOI
高影响因子
NANO
·
2023
·
IF 1.2
Chengsha Huang,Jin Li,Benze Wu
To obtain highly efficient photocatalysts, we successfully prepared the GO/ZnO/CdS/Cu 2 S composite that possesses superior photocatalytic degradation performance via a three-step solvothermal process. A series of characterization techniques were used to verify the composition and performance of prepared samples, such as X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), scanning electron microscopy (SEM), Raman spectra, photoluminescence (PL) spectroscopy and so on. SEM reveals that copper ions are supported on the surface of CdS to form active sites for photocatalysis. Under the irradiation of ultraviolet (UV) and visible light, GO/ZnO/CdS/Cu 2 S photocatalyst exhibited relatively excellent photocatalytic degradation efficiency of methylene blue (MB), with 100% (80 min) and 95% (30 min), respectively. Compared with pure ZnO ( k = 7 . 1 4 × 1 0 − 4 ) under the illumination of UV light, the kinetic constant of GO/ZnO/CdS/Cu 2 S catalyst is up to 8 . 1 3 × 1 0 − 2 , and as for visible light illumination, up to 9 . 8 7 × 1 0 − 2 , showing relatively excellent visible-light-induced photocatalytic activity. Besides, under UV and visible light, after three cycles of photodegradation, GO/ZnO/CdS/Cu 2 S still maintains the degradation efficiency of 78.3% and 74.8%, respectively, indicating that it has good stability. This work might inspire a new perspective that introduces the surface reaction sites (Cu 2 S) in the design of other graphene oxide/mental oxide-based heterojunctions for environmental purification.
研究领域:
材料科学
·
光催化
·
环境净化
·
纳米复合材料
·
半导体异质结
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）