Visible light antibacterial potential of cement mortar incorporating Cu-ZnO/g-C<sub>3</sub>N<sub>4</sub> nanocomposites

Liu, Xiaomin; Yang, Zhengxian; Li, Kang; Briseghella, Bruno; Marano, Giuseppe Carlo; Xu, Jiankun

doi:10.1039/d2ra08281k

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…By releasing it from ZnO, Zn 2+ can destroy the cell membrane leading to the inhibition of cell proliferation due to the denaturation of proteins and the disruption of the cellular energy mechanism by disturbing the electron transport. Although there are numerous reports in the literature attributing the potential antibacterial effect of Zn after catalysis, it was demonstrated that a strong antibacterial effect was also obtained in dark conditions [60]. The opinion of some researchers is that the antibacterial effect of Zn does not increase with the rise in Zn 2+ concentration.…”

Section: Zinc Oxide (Zno)mentioning

confidence: 99%

Advanced Geopolymer-Based Composites for Antimicrobial Application

Furtos,

Prodan,

Sarosi

et al. 2023

Materials

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In most studies about geopolymeric materials used in construction, the antibacterial properties of the building materials are treated as secondary features. Today, antimicrobial properties are a key feature in many building applications. The main objective of this article is to summarize the state-of-the-art in the area of design, development, and applications of nanoparticles as additives to geopolymer composites used in construction to improve their physical mechanical properties and induce a potential antibacterial effect, protecting them against alkali-resistant bacteria. On the basis of the literature and authors’ experience, the most important methods of obtaining especially the porous geopolymers, of nanomaterials used as additives, with potential antibacterial effect but also the potential mechanism of action against bacterial development were presented. The main findings show that using graphene oxide (GO) in geopolymer composites, but also other nanoparticles such as silver (Ag), zinc oxide (ZnO), silica (SiO2), titanium dioxide (TiO2), copper (Cu) as additives, is an effective way to induce a potential antibacterial effect and to improve the physical and mechanical properties in building materials.

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Section: Zinc Oxide (Zno)mentioning

confidence: 99%

Advanced Geopolymer-Based Composites for Antimicrobial Application

Furtos,

Prodan,

Sarosi

et al. 2023

Materials

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“…Correspondingly, a small shift in absorption peaks of Z 0.5 C 0.5 CN (approximately at 3320 cm − 1 , 1650 cm − 1 , 1250 and 813 cm − 1 ) towards the lower wavenumber is observed compared to that of pristine g-C 3 N 4 peaks. That alteration in peaks identi es the strong chemical interaction rather than simple physical interaction between the components of the heterostructure catalyst [47]. The Point of Zero Charge (PZC) analysis was applied to surface charge of photocatalyst surface as a function of pH, which in turn to investigate the mode of interaction of EBT onto photocatalyst surface.…”

Section: Ftir Spectroscopy Analysesmentioning

confidence: 99%

Effective removal of Eriochrome black T by a novel ZnxCu01-xFe2O4/C3N4 composite under simulated visible light irradiation

Liu,

et al. 2024

Preprint

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A new ZnxCu1−x Fe2O4/C3N4 composite was successfully prepared through a precipitation-assisted calcining technology. The characterization of the as-synthesized catalysts was performed using various analytical techniques. When compared with pure g-C3N4, pristine ZnFe2O4 and bare CuFe2O4, the ZnxCu1−xFe2O4/g-C3N4 composite exhibits higher photo-catalytic degradation of Eriochrome black T (EBT) under a visible light irradiation. When the molar ratio of Zn/Cu (1/1) and the mass ratio of ZnxCu01−xFe2O4 (50%) in the hybrid nanocomposite, ZnxCu1−xFe2O4/g-C3N4 composite exhibits high EBT removal efficiency of 99.73% by adding sodium persulfate (SPS) in waste water within 120 min of the photocatalytic degradation experiment. Enhanced the visible light absorption ability and the suppression of photoexcited charge carriers is also achieved by forming heterojunctions between Zn0.5Cu0.5Fe2O4 and g-C3N4. The Zn0.5Cu0.5Fe2O4/g-C3N4 exhibited 2.91 times higher degradation efficiency than Zn0.5Cu0.5Fe2O4 nanoparticles and 1.96 times higher degradation efficiency than g-C3N4. The trapping experiments were performed by adding different eliminating agents and it shows that the photodegradation of EBT was mainly caused by electron hole (h+), superoxide ion(·O2−) and sulfate radical (·SO4−). Among these resctive species, electron holes (h+) are the predominant reactive species. This study provided a promising approach for the treatment of contaminated water using ZnxCu1−xFe2O4/g-C3N4 as a photocatalyst.

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“…如, 在 Cu 掺杂 ZnO 材料传感 NO 2 研究方面, Patil 等 [19] 采用湿化学方法合成了纳米棒传感材料; Cu 掺杂浓度改变六边形 ZnO 晶体结构和材料表面形貌, 其器件可实现低温(120～220 ℃)下对 NO 2 气敏性能快速响应和高选择性检测. Salunkhe 和合作者 [13] 采用共沉淀方法制备了 Cu 掺杂 ZnO 薄膜器件; 在 3%原子比掺杂时和 200 ℃工作温度时, 可对 188 mg/m³ NO 2 实现 326%的高响应性, 响应和回复时间分别为 17 和 158 s. Cu 掺杂 ZnO 敏感材料还应用于 NH 3 [20][21] 、丙酮 [22] 、 H 2 S [23] 、CO [24] 、H 2 [25] 等传感研究, 同时还在光催化、抗菌等领域有广泛应用 [26][27][28][29] .…”

Section: 引言unclassified

“…尤其是引入金属杂原子和材料复合的情况下, 材料的结构表征则更加困难. 因此, 在本工作中, [12][13][14][19][20][21][22][23][24][25][26][28][29] . ZOC 中包括两类相邻 Cu• , 而 Cu 的氧化态则介于一价和二价之间, 与实验的 X 射线光电子能谱 (XPS)表征相一致 [24] .…”

Section: 引言unclassified

Density Functional Theory Study of Structures of Copper-doped and Graphitic Carbon Nitride-combined Zinc Oxides and Their Boosted Nitrogen Dioxide-sensing Performance

Wang,

Xiao,

Xie

et al. 2023

Acta Chimica Sinica

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Of numerous environmental problems, the air pollution caused by toxic nitrogen dioxide has become more and more serious. Its timing detection is of utmost importance but challenging. It is known that NO2 sensors fabricated by zinc oxide-derived materials suffer some issues. And thus synthetic strategies such as doping and combining have been developed to improve sensitive performance and modify operation condition. However, the relevant sensing reaction mechanism still remains unclear; moreover, the experimentally structural characterizations on sensitive materials (SMs) and reaction intermediates are rather difficult at the atomic level, which turn much worse for the doped and combined SMs. In the work, density functional theory calculations have been exploited to examine copper-doped zinc oxide (marked as ZOC) and its composites ZOC/CN and ZOC/Gr. CN and Gr are short for 2D materials, graphitic carbon nitride (g-C3N4) and graphene, respectively. The local structures have been accessible for these SMs and their intermediates along the reaction pathway. It is shown that ZOC bears the Cu-Zn heterobimetallic adsorption active sites, which hold NO2 via Cu/Zn-O dative bonds. The introduction of copper increases metal contribution to high-lying occupied molecular orbitals (MOs). Major NO2→ZOC donation and minor back-donation interactions have been recognized by charge decomposition analyses in terms of fragment MOs. Consequently, its adsorption free energy towards NO2 is strengthened by 0.27 eV relative to pristine ZnO. These well interpret the experimental findings that the copper-doped zinc oxide has much faster response time. Further combination with g-C3N4 enhances the NO2-sensing performance, which turns out to be the best SM candidate. Exemplarily, ZOC/CN shows the most negative NO2 adsorption energy (-0.31 eV), very small uphill energy for the rate-determining step (0.27 eV) and modest formation energy of nitrate (-1.06 eV). With these, the SM not only responses NO2 rapidly but also desorbs nitrate at mild

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Visible light antibacterial potential of cement mortar incorporating Cu-ZnO/g-C₃N₄ nanocomposites

Abstract: A hybrid Cu-ZnO/g-C3N4 nanocomposite was synthesized and introduced to fabricate photocatalytic cement mortar whose bactericidal activity was investigated under visible light.

Cited by 9 publications

References 42 publications

Advanced Geopolymer-Based Composites for Antimicrobial Application

Advanced Geopolymer-Based Composites for Antimicrobial Application

Effective removal of Eriochrome black T by a novel ZnxCu01-xFe2O4/C3N4 composite under simulated visible light irradiation

Density Functional Theory Study of Structures of Copper-doped and Graphitic Carbon Nitride-combined Zinc Oxides and Their Boosted Nitrogen Dioxide-sensing Performance

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Visible light antibacterial potential of cement mortar incorporating Cu-ZnO/g-C3N4 nanocomposites

Abstract: A hybrid Cu-ZnO/g-C3N4 nanocomposite was synthesized and introduced to fabricate photocatalytic cement mortar whose bactericidal activity was investigated under visible light.

Cited by 9 publications

References 42 publications

Advanced Geopolymer-Based Composites for Antimicrobial Application

Advanced Geopolymer-Based Composites for Antimicrobial Application

Effective removal of Eriochrome black T by a novel ZnxCu01-xFe2O4/C3N4 composite under simulated visible light irradiation

Density Functional Theory Study of Structures of Copper-doped and Graphitic Carbon Nitride-combined Zinc Oxides and Their Boosted Nitrogen Dioxide-sensing Performance

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Visible light antibacterial potential of cement mortar incorporating Cu-ZnO/g-C₃N₄ nanocomposites