一种具有硅藻土形貌的多级孔道结构丝光沸石及其制备方法

本发明公开了一种具有硅藻土形貌的多级孔道结构丝光沸石及其制备方法。本发明采用具有独特大孔结构的廉价硅藻土为沸石制备的模板和硅/铝源，在制备过程中，首先制备出硅藻土-多孔炭中间体，进而以多孔炭为模板、硅藻土为硅源和铝源，制备出具有硅藻土形貌的、大/微孔并存的多孔丝光沸石。不仅使所得丝光沸石具有硅藻土的形貌，还使之具有高的大孔性，从而具备多级孔道结构，进而使其吸附具有高效性。并且，较之其它模板法所得丝光沸石工艺更加简单、环境潜在危害性更低

一种硅藻土基硅肥及其制备方法

本发明涉及肥料领域，提供了一种硅藻土基硅肥的制备方法，其包括：将硅藻土置于碱性溶液中形成悬浊液，对悬浊液加热保温后，冷却，进行固液分离，取分离液；向分离液中加入酸性溶液调节分离液的pH值至8～10，加热充分搅拌后冷却。该制备方法有效地将有害金属分离，达到降低硅藻土内重金属含量的目的，硅藻土基硅肥呈碱性，有利于改善土壤的酸度，进而改良土壤，该制备方法具有简单易行、成本低廉、易于推广等优点。此外，还提供了一种硅藻土基硅肥，其是由上述硅藻土基硅肥的制备方法制得。该硅藻土基硅肥的含硅量高，更易于作物吸收，仅少量施用即可大大增加作物产量，并且其施用方式多样化，可以进行根系施肥，也可以作为叶面肥施用

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies