排序方式: 共有63条查询结果,搜索用时 62 毫秒
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Mn-CeOx/Ti-PILC的制备、表征及脱硝性能研究 总被引:1,自引:0,他引:1
采用钛酸丁酯溶胶法制备了钛基柱撑黏土(Ti-PILC),通过浸渍法制备Mn-CeOx/Ti-PILC,运用BET、FT-IR、XRD、NH3-TPD、XPS等技术对催化剂进行表征分析。结果说明,经过钛交联柱撑制备的Mn-CeOx/Ti-PILC是一种具备较大比表面积(133.7 m2/g)的多孔性介孔材料;活性成分主要为CeO2以及Mn2O3。Mn-CeOx/Ti-PILC低温下具有较好的选择性能催化剂还原(SCR)脱硝活性,180 ℃下,脱硝活性达到83.1%。 相似文献
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We present our lab cryocooler-based superconducting nanowire single photon detection (SNSPD) system. The dark count rate and system quantum efficiency are investigated at the bath temperature of 3.1 K with a 300-inK temperature fluctuation. The polarization sensitivity of the SNSPD is also measured, and the system counting rate and the timing jitter are discussed. 相似文献
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本文证明了在相对于子范畴的情形下上有界复形的同伦分解的存在性,推广了经典的复形的同伦分解,是使得相对导出范畴具有可操作性的基础.进一步,证明了在R-模范畴和相对于特殊子范畴的情形下,任意无界复形的同伦分解的存在性.最后,建立了同伦范畴和相对导出范畴的(余)局部化序列. 相似文献
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Design of Highly Sensitive Surface Plasmon Resonance Sensors Using Planar Metallic Films Closely Coupled to Nanogratings 下载免费PDF全文
We investigate the sensitivity enhancement of surface plasmon resonance (SPR) sensors using planar metallic films closely coupled to nanogratings. The strong coupling between localized surface plasmon resonances (LSPRs) presenting in metallic nanostructures and surface plasmon polaritons (SPPs) propagating at the metallic film surface leads to changes of resonance reflection properties, resulting in enhanced sensitivity of SPR sensors. The effects of thickness of the metallic films, grating period and metal materials on the refractive index sensitivity of the device are investigated. The refractive index sensitivity of nanograting-based SPR sensors is predicted to be about 543 nm/RIU (refractive index unit) using optimized structure parameters. Our study on SPR sensors using planar metallic films closely coupled to nanogratings demonstrates the potential for significant improvement in refractive index sensitivity. 相似文献
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本文给出了一个简单的测定溶质分子在不同吸附剂上吸附参数的前沿分析方程,它给出了平均突破时间和进口溶质浓度之间的关系。通过它的线性形式能够测定两个重要的吸附参数,一个是溶质分子在吸附剂表面吸附的热力学平衡常数KSL,一个是分布在吸附剂表面的总的吸附点的数目nt。通过一些芳香烃在RP-C18反相介质和一些蛋白质在RP-C18反相介质、WCX-1离子交换介质、PEG-400疏水介质以及Zn2+ 和 Cu2+螯合的Che1ating SepharoseFast-flow亲和介质的前沿分析对此方程进行了验证,并测定了它们的吸附参数。结果表明,所有这些前沿分析体系都能够用此方程良好描述,它们的参数nt分别近似保持一个常数且独立于所用的溶质分子,而它们的参数KSL不仅与所用的介质有关,而且与所用的溶质分子有关。 相似文献
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