新型消防移动通信指挥系统设计开发

提出了新型移动消防通信指挥车系统的研究设计与开发方法。此消防移动通信指挥系统采用无线移动流媒体传输设备与单兵、支队级指挥车、中队级指挥车和指挥中心之间构成临时局域网络,能快速、及时、准确地收集到现场数据、实时语音、图像信息,通过多种方式接入与指挥中心进行高效地信息传输,实施灵活机动的指挥。支队级指挥车可向现场指挥人员提供所需实时的图像、视频、语音、数据等决策信息,实现现场的应急指挥功能。中队级指挥车将无线移动通信网络、本地视频监控和计算机网络有机地融合为一个整体。该系统技术先进,传输能力强。     

Ta/BDD薄膜材料电极在检测苯胺中的应用

制作钽衬底掺硼金刚石薄膜材料电极(Ta/BDD),并利用此薄膜材料电极为工作电极通过阴极溶出伏安法检测水中的苯胺.用热丝化学气相沉积(HFCVD)方法沉积Ta/BDD薄膜电极,扫描电镜和拉曼光谱表明电极具有良好的物理性质,循环扫描测试表明电极具有宽的电势窗口4.1V(-1.8～+2.3V vs SCE)和低背景电流,此特性对于电化学检测有着明显的优势.发现苯胺在氧化处理的Ta/BDD电极上有可逆的氧化还原峰,检测过程中未发生电极钝化现象.Ta/BDD电极在酸性介质中苯胺检测效果较明显,苯胺在1～40靘ol/L范围内浓度与溶出峰电流值有较好的线性关系.     

热丝化学气相沉积制备BDD薄膜电极的电催化特性

研究了热丝化学气相沉积法(HFCVD)制备得到掺硼金刚石膜电极电催化氧化典型有机物苯酚的特性.Raman光谱测试显示制备BDD电极具有较好的金刚石相,循环伏安测试表明该电极具有较高的析氧过电位(+2.3V vsSCE).在电催化氧化苯酚过程中,化学需氧量(COD)能够有效去除,降解过程中有较高的电流效率,在COD较高的情况下,瞬时电流效率(ICE)可达100%,随着COD的降低ICE逐渐减少.催化实验结果表明,BDD电极是一种优良的电催化降解有机物新型电极.     

Characterization of sputtered ZnO films under different sputter-etching time of substrate

Polycrystalline ZnO films are prepared using radio frequency magnetron sputtering on glass substrates which are sputteretched for different time. Both the size of ZnO grains and the root-mean-square (RMS) roughness decrease, as the sputteretching time of the substrate increases. More Zn atoms are bound to O atoms in the films, and the defect concentration is decreased with increasing sputter-etching time of substrate. Meanwhile, the crystallinity and c-axis orientation are improved at longer sputter-etching time of the substrate. The Raman peaks at 99 cm⁻¹, 438 cm⁻¹ and 589 cm⁻¹ are identified as E₂(low), E₂(high) and E₁(LO) modes, respectively, and the position of E₁(LO) peak blue shifts at longer sputter-etching time. The transmittances of the films, which are deposited on the substrate and etched for 10 min and 20 min, are higher in the visible region than that of the films deposited under longer sputter-etching time of 30 min. The bandgap increases from 3.23 eV to 3.27 eV with the increase of the sputter-etching time of substrate.     

Internal stress in MPCVD diamond films on the Si substrate based on XRD line shape

The diamond films adherent to Si substrate are deposited with the microwave plasma CVD （MPCVD） at microwave powers of 6000 W and 4000 W fTom 6 h to 10 h, respectively, the internal stresses of the films are measured by XRD. Spectral peak shift and widening arc applied to calculate the magnitudes of macro and micro stresses. The results show that the macro stress is tensile. The internal stress can be controlled by the microwave power. With the microwave power increasing,the intrinsic and macro stresses decrease, and the micro stress increases significantly. Also, it can be found that the macro and micro stresses increase with deposited time when the other conditions are the same.     

原位铋修饰掺硼金刚石电极检测分析锌离子

以原位铋修饰掺硼金刚石(BDD)电极为传感电极对锌离子进行检测分析,方法迅速、简便、绿色环保.相对裸电极原位铋修饰BDD电极,锌离子响应电流信号有较大提高.考察了扫描方式、铋离子浓度、电极硼掺杂浓度对锌离子传感分析的影响,优化了传感分析中脉冲频率和尺寸、支持电解液pH值、沉积电位、沉积时间等参数.锌离子浓度与溶出峰电流值在50~300μg/L范围内呈线性关系,相关系数为0.9979,检出限为2.32μg/L.电极表现出较好的重复性.常见离子除铜离子对锌离子测定有很大干扰外,其他离子干扰相对较小.     

Ta衬底B掺杂金刚石薄膜电极极化特性

研究了热丝化学气相沉积(HFCVD)方法在Ta衬底上制备B掺杂金刚石(BDD/Ta)薄膜电极的极化特性.扫描电镜(SEM)和Raman光谱显示,BDD/Ta薄膜电极具有较好的成膜质量.电化学测试表明,BDD/Ta薄膜电极具有比常规电极如Pt、IrO2和RuO2更宽的电势窗口,在Na2SO4溶液中的电势窗口为4.1 V(-1.8V～+2.3 V vs SCE),电势窗口受沉积C源浓度和支持电解液PH值的影响.BDD/Ta薄膜电极在[Fe(CN)6]3-/4-体系中电化学反应具有良好的准可逆性,其动力学主要是受扩散过程所控制.紫外-可见吸收光谱显示,BDD/Ta薄膜电极能够有效阳极电催化降解苯酚,降解过程中化学需氧量(COD)去除率达98.6%.