ACS Sensors
·
2025
·
IF 9.1
Wenbin Ren,Jinfeng Luan,Liang Yin,Huijuan Chen,Changchun Wang,Pinhua Zhang,Guangliang Cui,Li Lv
The development of real-time trace-level NO2 quantification platforms that can be operated at room temperature constitutes a critical advancement for occupational safety and public health monitoring systems. This study demonstrates a room-temperature NO2 sensor using MXene–Cu2O composites prepared via a hydrothermal method. Systematic evaluation of MXene-introduced effects identified the 0.84 wt % MXene–Cu2O composite as optimal, exhibiting 4-fold enhanced sensitivity and shorter response (55 s)/recovery (35 s) time compared to pure Cu2O. Additionally, the sensor exhibits a low detection limit (10 ppb), high selectivity, great reversibility, and long-term stability. The enhanced sensing performance originates from precisely engineered interfacial architectures between MXene and Cu2O, which effectively adjust the charge-transfer behavior through the conduction tunnel in the sensing material. Furthermore, oxygen vacancy engineering creates defect-mediated adsorption centers that promote selective NO2 chemisorption through charge polarization effects. This research offers a novel strategy for designing optimized structures to enhance the sensitivity of MOS-based materials for NO2 gas detection.
研究领域:
材料科学
·
环境监测
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jianhong Han,Xinyuan Teng,Wenhui Jia,Pai Liu,Yumei Li,Weida Wang
Benzotriazole (BTA) is a kind of nitrogen-containing organic matter with great impact on the environment and biology. In order to further improve the degradation effect of BTA, SnO 2 /Fe 2 O 3 /Cu 2 O (SFC) photocatalytic materials have been successfully prepared by one-pot hydrothermal method . According to the material characterization and experimental results, SFC has a uniform distribution of active sites, which is conducive to the efficient degradation of BTA in water. When the pH is 6.68, the dosage is 0.09 g/L, and the time is 40 min, the degradation effect is the best. The removal rate of BTA by SFC reached 99.89 %. The repeatability test showed that the removal rate of SFC can reach more than 99.27 % after five cycles of experiments.Through PL , UV–Vis and i-t curve analysis, it proved the main mechanism of degradation of BTA by PEC enhanced by SFC. Finally, the possible degradation pathways of BTA were speculated, which provided a new technical support and theoretical basis for the effective treatment of wastewater containing BTA.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Water Science and Engineering
·
2022
·
IF 0
Jian-hong Han,Wen-hui Jia,Yi Liu,Wei-da Wang,Lian-ke Zhang,Yu-mei Li,Peng Sun,Jian Fan,Shu-ting Hu
Given the difficulties of degrading benzotriazole (BTA), this study used a one-pot hydrothermal method to prepare α-Fe 2 O 3 /Cu 2 O (FC) composites for photoelectrocatalytic (PEC) degradation of BTA. The characterization of FC structure showed that Cu 2 O in cubic crystals was loaded with circular sheets of Fe 2 O 3 . Owing to this structure, FC showed efficient PEC degradation of BTA when exposed to ultraviolet light. The experimental results demonstrated that FC efficiently degraded BTA. When the PEC degradation continued for 60 min, 100% degradation of BTA was achieved because FC enhanced the photoelectron-hole separation and the separation and transfer of articulated carriers. High performance liquid chromatography–mass spectrometry showed that intermediates formed during the PEC degradation of BTA. Finally, various pathways for degradation of BTA were postulated. This FC-based PEC system provides a harmless and effective method for degradation of BTA.
研究领域:
环境科学
·
催化材料
·
化学工程
✓ 已验证
产品关联
DOI
Journal of Coatings Technology and Research
·
2024
·
IF 2.3
Chen Lvxin,Yu Zhijie,Fang Yinchun
Structural colorization as a new green coloring method has received more and more attention. However, structural colors with only color can no longer meet the actual needs. It is of great practical significance to develop functional structural colors with brilliant colors and special function. In this study, Cu 2 O single crystal spheres with different sizes were successfully prepared and were sprayed on the surface of polyester/cotton fabric to obtain bright purple, purple red, light blue, dark green, grass green, and orange–yellow structural colors. Due to the introduction of polyacrylate (PA) adhesive, Cu 2 O structural colorized fabrics had excellent abrasion and washing colorfastness and stability. Meanwhile, the Cu 2 O structural color has little influence on the original softness and air permeability of fabric. The structural colorized fabric showed excellent antibacterial properties against E. coli and S. aureus , and the antibacterial rates decreased with the increasing of particle sizes of Cu 2 O spheres. The large-scale preparation of uniform structural colors on fabric can be realized by the spraying method. The fine and complex structural color patterns can also be obtained by spraying Cu 2 O single crystal spheres, showing good industrial application prospects. Therefore, this study provides experimental basis for the development of functional structural colors with brilliant colors and excellent antibacterial properties. Graphical abstract
研究领域:
材料科学
·
纺织工程
·
生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Wenbei Yu,Jing Liu,Ming Yi,Jiuxiang Yang,Wenda Dong,Chao Wang,Heng Zhao,Hemdan S.H. Mohamed,Zhao Wang,Lihua Chen,Yu Li,Bao-Lian Su
We report the well-designed active {1 1 0} and {1 1 1} faceted Cu 2 O hollow nanospheres (Cu 2 O-HNs) for the quick removal of the high concentration pollutants in water. For the first time, these Cu 2 O-HNs combine the advantages of the active facets, hollow structure and nanostructures. The abundance of dangling Cu atoms in two active facets results in positively charged surface to effectively react with the negatively charged pollutants. The hollow structure provides the opportunity to take full use of these active sites. Consequently, the active faceted Cu 2 O-HNs demonstrate excellent adsorption and photodegradation capacities for high concentrated anionic dyes. The smallest Cu 2 O-HNs (~100 nm) can adsorb ~90% of methyl blue (MB) (100 mg L −1 ) in 10 min and degrade ~92% of MB (100 mg L −1 ) in 10 min under visible-light. In particular, a film consisting of the smallest Cu 2 O-HNs can quickly remove high concentrated organic dyes and be reused after solar light irradiation for 10 min in air, showing the promising practical application for the removal of organic pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
TETRAHEDRON LETTERS
·
2020
·
IF 2.275
Youming Huang,Hongyi Chen,Wenting Zheng,Qingle Zeng
A new protocol for the synthesis of (enantioenriched) benzylic sulfones via the Cu 2 O-catalyzed C–S bond cross coupling of alkane-/arene-sulfinates and (enantioenriched) benzylic quaternary ammonium salts has been developed. The product benzylic sulfones were obtained in good to high yields (75–96%). Chiral arylmethyl sulfones with high enantiomeric excess (90–94% ee) were also synthesized in the presence of Cu 2 O and 1,1′-bis-(diphenylphosphino)ferrocene (dppf).
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Lei Zheng,Haili Yu,Yaling Yue,Fengjuan Wu,Yi He
We report a visual chronometric assay for Cr3+ based on the Cu2O nanocube-mediated clock reaction of methylene blue (MB) and N2H4. MB with a blue color can be easily reduced by excess N2H4 to form colorless leuco-MB in the presence of Cu2O nanocubes as a catalyst in a short time. However, the addition of Cr3+ decreases the catalytic activity of Cu2O nanocubes owing to the coordination interactions between them, leading to an increase in the reaction time. The reaction time change was employed for selective detection of Cr3+. This assay has a wide dynamic range from 0.03 to 600 μM with a limit of detection of 2.7 nM. Remarkably, different concentrations of Cr3+ can be directly detected with the naked eye by observing the color-fading speed. Additionally, this assay was successfully used to determine Cr3+ in real water samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2017
·
IF 0
Huanfeng Tang,Xiaolin Liu,Ming Xiao,Zaiyin Huang,Xuecai Tan
In-situ microcalorimetry was used to obtain the molar surface Gibbs energy, molar surface enthalpy and molar surface entropy of Cu 2 O nanoparticles, and their influences of particle size and morphology were investigated. The activity and mechanism of photocatalytic degradation of methyl orange were discussed with a correlation between the Cu 2 O surface energy. Results indicated that the surface thermodynamic functions increased with the decrease of the particle size. The Cu 2 O surface energy was of the following order: spherical > octahedral > tremella-like with corresponding values of 9.826, 8.438 and 6.901 kJ mol −1 , respectively. The order of catalytic activity was tremella-like > particle spherical > octahedral with a corresponding degradation rate of 94.79, 70.10 and 68.19%, respectively. The photocatalytic activity was significantly related to surface energy. Interestingly, we found that nano-Cu 2 O with low surface energy exhibited a high photocatalytic activity. This study provided a new understanding of the surface-activity relationship between nanomaterial surface energy and catalytic properties.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 7
·1715-1721
·
IF 5.976
Baofang Cai,Yanjie Su,Jing Hu,Cheng Zou,Yafei Zhang
One-dimensional C60 nanostructures with tunable bandgaps and a wide optical absorption range are considered as potential candidates for ultraviolet/visible photodetectors. Herein, we report a low-cost visible photodetector based on C60 nanorods (NRs), which was synthesized using the liquid–liquid interfacial precipitation method. The experimental results demonstrate that the photosensitivity of C60 NR-based visible photodetectors can be enhanced significantly by coupling with Cu2O nanocubes (NCs, ∼20 nm in size). The photosensitivity of a photodetector based on the C60 NR/Cu2O NC is ∼72.5 and 40 fold higher after ratio optimization with 405 and 532 nm light illumination, respectively, which are 3.8 and 5.6 times correspondingly higher than those of pure C60 NRs. Furthermore, the energy band structure of the C60 NR/Cu2O NC heterojunction was analyzed using cyclic voltammetry to illustrate the dramatically enhanced photosensitivity. The enhanced mechanism of photosensitivity is ascribed mainly to the fact that the formation of a p/n heterojunction in the C60 NR/Cu2O hybrid strengthens the separation of photo-induced electrons/holes at the interface.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Bingqing Wang,Tao Fu,Baohua An,Yong Liu
Sulfate radicals-based advanced oxidation process (SRAOP) has received increasing attention in the wastewater treatment area because sulfate radicals have high redox potential. The key for SRAOP is to develop high efficient catalysts that can effectively and stably activate persulfate (PS) to produce sulfate radicals. Cu 2 O is a good activator of PS and photo-catalyst. However, its catalytic activity is relatively low because of the poor stability and the recombination of electron and holes. In theory, Cu 0 can reduce Cu 2+ to form Cu + , which can decrease the recombination of electron and holes from the Cu 2 O by the formation of heterojunction. In this study, Cu 0 -Cu 2 O was synthesized by a simple ball-milling method. The as-prepared Cu 0 -Cu 2 O was characterized and used to activate PS for sulfamerazine (SMZ) degradation by means of UV illumination. In the Cu 0 -Cu 2 O/PS/UV system, the removals of 100% SMZ and 30% TOC within 30 min were achieved, respectively, and the removal efficiency of SMZ decreased by only 12.2% after 5 cycles. The high efficiency and good catalytic stability of Cu 0 -Cu 2 O for the activation of PS were due to that Cu 0 and photo-induced electron of Cu 2 O promoted the conversion of Cu 2+ to Cu + . Quenching experiments demonstrated that the hydroxyl radicals and sulfate radicals contributed to SMZ degradation. However, the concentrations and fractions of radicals was affected by the initial pH of solution. Nine intermediate products were identified, and the degradation pathways were proposed, including the fission of sulfur and nitrogen bond, the oxidation of methyl group and the hydroxylation of benzene ring. The effects of initial pH, PS concentration, Cu 0 -Cu 2 O dosage and SMZ initial concentration on the degradation of SMZ were investigated. This study provided an effective catalyst that could simultaneously activate PS and utilize UV to form photo-induced electron, which could enhance the degradation and mineralization of organic pollutants.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 8
·087503
·
IF 4.316
Fangzhao Pu,Zhipeng Yu,Wenjing Lu,Chuncai Kong,Ruijun Lin,Xingyu Bai,Xiaojing Zhang,Jian Lv,Zhimao Yang
Fast, reliable, and low-cost glucose detection methods are of great importance for the control of diabetes. In this study, Cu2O combined with Cu nanoparticles anchored on reduced graphene oxide (RGO), was synthesized to function as the electrode in a non-enzymatic glucose sensor. The synergistic effect between Cu nanoparticles and Cu2O, together with the high conductivity of RGO enabled considerably lower resistivity with greater glucose oxidation activity than pure Cu2O. The RGO@Cu2O@Cu electrode exhibited a high sensitivity of 1.112 mA mM−1 cm−2 with a detection limit of 0.019 μM, and the linear range is up to 4 mM. Additionally, the RGO@Cu2O@Cu electrode displayed good anti-interference performance within human blood and high stability while operating for a long duration. Significantly, the glucose detection capability of the as-designed electrode was comparable to commercial sensors, representing a valuable design for future non-enzymatic glucose sensing.
研究领域:
生物医学工程
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Zhenhua Zhang,Liping Fan,Weiqi Liao,Feiyue Zhao,Cen Tang,Jing Zhang,Ming Feng,Ji-Qing Lu
Several CeO 2 -CuO/Cu 2 O nanocomposites with different CuO structures were used to identify the structure sensitivity of CuO in the CeO 2 -CuO/Cu 2 O catalyzed CO oxidation. The CO oxidation catalyzed by various CuO-CeO 2 interfacial sites involves a typical Mars-van Krevelen mechanism, in which the CuO-CeO 2 interfaces in the CeO 2 -CuO/c-Cu 2 O (cubes) nanocomposites are more intrinsically active, exhibiting ca. 15 kJ mol −1 lower activation energy than those in the CeO 2 -CuO/o-Cu 2 O (octahedra) and CeO 2 -CuO/d-Cu 2 O (rhombic dodecahedra) nanocomposites at CeO 2 loadings no less than 0.75 wt%. The higher activity is relevant to lower coordinated oxygen ions on CuO/c-Cu 2 O surface and thus better CO reactivity for the CeO 2 -CuO/c-Cu 2 O nanocomposites, which therefore indicates that the active oxygen species on CuO-CeO 2 interface should come from CuO rather than CeO 2 . Moreover, a highly active 13.2 %CeO 2 -CuO/c-Cu 2 O(s) catalyst for CO oxidation is realized on fine Cu 2 O cubes, which thus has high density of active sites.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）