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| 1 | Plasmonic photo-assisted electrochemical sensor for detection of trace lead ions based on Au anchored on two-dimensional g-C_(3)N_(4)/graphene nanosheets显示文摘In this paper,a plasmonic photo-assisted electrochemical sensor,Au anchored on two-dimensional(2 D)graphitic carbon nitride(g-C_(3)N_(4))/reduced graphene oxide(rGO)nanosheets(Au/g-C_(3)N_(4)/rGO),was facile fabricated.The morphology and structure of the composite are characterized by transmission electron microscope,X-ray photoelectron spectroscopy,X-ray diffraction and ultraviolet-visible spectrophotometer(UV-Vis).Based on the semiconductor of g-C_(3)N_(4) and optical properties of surface plasmon resonance for Au,the as-prepared Au/g-C_(3)N_(4)/rGO showed high sensitivity for the detection of trace lead ion[Pb(Ⅱ)]by differential pulse anodic stripping voltammetry in the presence of visible light illumination.Under optimized conditions,the limit of detection(signal-to-noise ratio(S/N)=3)Pb(Ⅱ)detection can be low to0.1 nmol·L^(-1).In addition,the interference research and real soil sample detection were measured to confirm the possibility of practical applications. | Jia-Yue Hu Zhi Li Chun-Yang Zhai Jun-Feng Wang Li-Xi Zeng Ming-Shan Zhu | 2021 | Rare Metals2021，40，7： | 3 |
| 2 | 具有接近C_(6)N_(7)结构和优异可见光吸收的新型氮化碳应用于高效光催化显示文摘合理设计并制备新型氮化碳是化学和材料领域的研究热点.本文受尿素聚合的启发,以草酰二胺替代部分尿素制备了C-C桥联、结构接近C_(6)N_(7)的新型氮化碳UO_(x)(x为尿素与草酰二胺的物质的量之比,x=1、1.5、2、2.5和3).密度泛函理论计算表明,UO_(x)的共轭性由单个庚嗪环扩展到了整个材料框架.因此,其禁带宽度缩小到2.05 e V,吸收带边被大幅扩展到600 nm.此外,它的载流子传输和分离也得到显著增强,因而展现出优异的光催化活性.在一系列样品中,UO_(2)具有最佳的光催化活性,其光催化析氢速率约为108.59μmol h^(-1)(10mg催化剂),表观量子效率在420和600 nm下分别为36.12%和0.33%.此外,UO_(2)对二苯肼氧化以及酚类降解也呈现明显优于传统g-C_(3)N_(4)的优异光催化活性和稳定性,它是一类极具发展前景的新型二维材料. | 赵鑫宇 赵英男 谭华桥 孙慧颖 覃星 何永基 周敏 林锦良 李阳光 | 2021 | Science Bulletin2021，66，17： | 1 |
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