ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Wen-Long Wang,Zi-Bo Jing,Yi-Lin Zhang,Qian-Yuan Wu,Jörg E. Drewes,Min-Yong Lee,Uwe Hübner
Low-pressure mercury lamps with high-purity quartz can emit both vacuum-UV (VUV, 185 nm) and UV (254 nm) and are commercially available and promising for eliminating recalcitrant organic pollutants. The feasibility of VUV/UV as a chemical-free oxidation process was verified and quantitatively assessed by the concept of H2O2 equivalence (EQH2O2), at which UV/H2O2 showed the same performance as VUV/UV for the degradation of trace organic contaminants (TOrCs). Although VUV showed superior H2O activation and oxidation performance, its performance highly varied as a function of light path length (Lp) in water, while that of UV/H2O2 proportionally decreased with decreasing H2O2 dose regardless of Lp. On increasing Lp from 1.0 to 3.0 cm, the EQH2O2 of VUV/UV decreased from 0.81 to 0.22 mM H2O2. Chloride and nitrate hardly influenced UV/H2O2, but they dramatically inhibited VUV/UV. The competitive absorbance of VUV by chloride and nitrate was verified as the main reason. The inhibitory effect was partially compensated by •OH formation from the propagation reactions of chloride or nitrate VUV photolysis, which was verified by kinetic modeling in Kintecus. In water with an Lp of 2.0 cm, the EQH2O2 of VUV/UV decreased from 0.43 to 0.17 mM (60.8% decrease) on increasing the chloride concentration from 0 to 15 mM and to 0.20 mM (53.5% decrease) at 4 mM nitrate. The results of this study provide a comprehensive understanding of VUV/UV oxidation in comparison to UV/H2O2, which underscores the suitability and efficiency of chemical-free oxidation with VUV/UV.
研究领域:
环境工程
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yu Wang,Jie Tang,Cong Peng,Meifeng Xu,Lei Zhang,Chaonan Wang,Yonglong Jin,Tian Xu
Local surface plasmon resonance (LSPR) based on metal nanostructures was widely used in enhanced light capture and light absorption . In addition, LSPR can also facilitate processes such as exciton dissociation and charge transfer (CT) in solar cells. We developed perovskite solar cells (PSCs) by coating chips with hexagon-like nanostructures on the backside of Indium tin oxide (ITO) conductive glass using the double metal cladding waveguide (DMCW) technology. The optical absorption and photoelectric conversion efficiency (PCE) of the PSCs with different morphologies of chips were analyzed. The LSPR of the chips corresponded with the absorption capacity of perovskite . LSPR enhanced the scattering, gathering, and capture of light energy . Because the strong absorption rates at the long wavelengths after 600 nm in the ultraviolet visible (UV–Vis) spectrum, the properties of PSCs with the chips are improved. The PCE and short circuit current density (J sc ) increased by 27.21%, and 6.78%, respectively, attributed to the increase in the optical path of incident light and the light absorption capacity of the active layer.
研究领域:
材料科学
·
光子学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiaojie Luo,Zhenzhen Zhang,Yadong Chen,Chang Shu,Yajie Cheng,Yanji Lu,Jiajia Xu,Xiaodong Li
Deep caries management faces a critical dilemma: preserving pulp vitality versus ensuring durable restoration. Current dentin bonding technique and materials fail to eliminate residual pathogens in preserved soft dentin or stabilize resin-dentin interfaces against enzymatic/microbial degradation. Here, we present a light-programmable AgCl@Ag nanoparticle system that overcomes these dual challenges through dynamic nanochemistry. By orchestrating in situ AgCl deposition and photoreduction, our strategy achieves three breakthroughs: (1) Structural reinforcement: Polarity-driven Ag + chelation masks polar groups in demineralized dentin matrix (DDM), releasing interface confined water while doubling DDM modulus, greatly enhancing BisGMA infiltration to realize hermetic seal at the cavity periphery; (2) Sequential antibacterial action: Ag + rapidly penetrates biofilms to form AgCl NPs, followed by light-triggered transformation from AgCl NPs to AgCl@Ag NPs to generate Cl₂/HClO for residual pathogen eradication, to achieve a bacteria-free environment; (3) Self-stabilizing interface: Reducible AgCl@Ag nanoparticles inhibit MMPs and resist microbes and aging-induced delamination. This photo-responsive system eliminates secondary caries risk while maintaining pulp vitality, seamlessly integrating with clinical workflows. Through spatiotemporal control of silver chemistry, we redefine dental adhesion as intelligent platform to construct a biointerface that concurrently achieve sterilization, structural optimization, and enzymatic resistance. Our work establishes a paradigm for adaptive material design in moist biological environments, with implications extending to bone adhesives and chronic wound management.
研究领域:
牙科材料
·
纳米医学
·
抗菌治疗
·
粘接牙科学
·
生物界面工程
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Cuixia Guo,Zhijie Pan,Zeyu Huang,Zhanghuang Zou,Feng Huang
The precise biomolecular detection is crucial in medical diagnosis, biological research, and bioengineering. In this paper, a phase multiplexing based molecularly imprinted polymer biosensor (PM-MIPB) is proposed. It considers the high throughput and non-labeling detection mode by multiplexing without increasing the number of scanning and detecting elements, as well as the high specificity and affinity of molecular imprinting technology, to improve the throughput and accuracy of molecular detection. Phase multiplexing originates from phase-sensitive spectral-domain optical coherence tomography, where the low-coherence interferometric spectra with multiple optical path differences are spectrally analyzed to identify and extract the interferometric phases across these paths. Based on this principle, simultaneous quantitative detection and interaction analysis of multiple analytes can be realized by preparing multiple optical-path difference-encoded (also thickness-encoded) detection channels and simultaneously extracting the phases of the interfering signals. Furthermore, PM-MIPB utilizes molecularly imprinted polymer as an alternative to antigen-antibody systems, creating selective recognition sites through specific template molecules to achieve highly selective, specific and stable detection of target molecules. Theoretically, PM-MIPB can simultaneously measure up to 255 biomolecules, with a detection speed of 0.025 seconds, recovery rate ranging from 95.65% to 103.41%, and sensitivity of 4.05×10
-3
nm·mL/μg. By integrating phase multiplexing with molecular imprinting, PM-MIPB meets the high demand for efficient, high-throughput, and accurate biomolecular detection in life science field.
研究领域:
生物医学工程
·
分析化学
·
光学传感
·
分子生物学
✓ 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）