One-pot Synthesis of MoO_(3)/PI Composite with Enhanced Photocatalytic Performance for Oxidative Coupling of Amines to Imines

Organic-inorganic MoO_(3)/PI(MoPI)composites were prepared using a simple one-pot thermal copolymerization method.The resulting composites exhibited enhanced photocatalytic activity for the selective oxidation of benzylamine to N-benzylidene benzylamine(N-BDBA)in ambient air under simulated solar light irradiation compared to pristine MoO_(3) or polyimide(PI).In particular,the MoPI composite with a 0.3:1 molar ratio of Mo to melamine,referred to as MoPI-0.3,demonstrated the best performance in the photo-oxidation of benzylamine,achieving a benzylamine conversion of 95%with a N-BDBA selectivity exceeding 99%after 3 h irradiation.The enhanced photocatalytic activity of the MoPI-0.3 catalyst was attributed to the formation of a direct Z-scheme heterojunction between MoO_(3) and PI,facilitating more efficient separation of the photoinduced electrons and holes.Additionally,the MoPI-0.3 composite maintained considerably high activity over four consecutive cycles,highlighting its good stability and recyclability.Furthermore,the MoPI-0.3 composite could photo-oxidize benzylamine derivatives and heterocyclic amines to their corresponding imines,demonstrating the universal applicability of this composite catalyst.

A Metal-free Polyimide Photocatalyst for the Oxidation of Amines to Imines

Polyimide(PI) is an organic polymer material with good stability and diverse sources that has attracted widespread attention in the field of photocatalysis. In this study, a series of PI photocatalysts were synthesized by a thermal polymerization approach using pyromellitic dianhydride(PMDA) and various diamine monomers(melamine(MA), 4,4′-oxydianiline, and melem) as the precursors as well as different heating rates. The effects of the diamine precursor and heating rate on the structure, composition, morphology, and optical properties of the as-prepared PI materials were systematically investigated by various characterization techniques. The selective photo-oxidation of benzylamine was used as a model reaction to evaluate the photocatalytic activities of the resulting PI samples for the oxidation of amines to imines. The results revealed that the PI sample prepared using MA and PMDA as the precursors and a heating rate of 7 ℃/min(MA-PI-7) exhibited the best catalytic performance, with 98% benzylamine conversion and 98% selectivity for N-benzylidene benzylamine after 4 h of irradiation. Several benzylamine derivatives and heterocyclic amines also underwent the photo-oxidation reaction over the MA-PI-7 catalyst to afford the corresponding imines with good activity. In addition, MA-PI-7 exhibited good stability over four successive photocatalytic cycles.

BiPO_(4)-BiOIO_(3)复合物的水热合成及其光催化降解染料研究

采用一步水热法合成了BiPO_(4)-BiOIO_(3)复合物,并进行了FT-IR、XRD、SEM、XPS、UV-DRS等表征。以不同类型的有机染料罗丹明B(RhB)、甲基橙(MO)和亚甲基蓝(MB)为污染模型,考察了BiPO_(4)-BiOIO_(3)的光催化降解性能。在模拟太阳光照射下,染料的浓度和用量分别为10 mg·L^(-1)、50 mL,催化剂用量为50 mg,照射40 min时,MB被完全降解,照射50 min时,RhB和MO均被完全降解。BiPO_(4)-BiOIO_(3)的光催化机理实验表明,·O_(2)和h+是主要的活性物种。循环实验中,第五次循环时降解率仍有83.5%,表明BiPO_(4)-BiOIO_(3)具有较好的稳定性,具有可重复利用价值。

天玑骨科机器人辅助脊柱手术护理标准操作程序的建立与应用

目的建立天玑骨科机器人辅助脊柱手术护理标准操作程序,并探讨其在临床中的应用效果。方法选择2019年7月至2020年6月行机器人辅助脊柱手术患者112例作为对照组,实行常规围术期护理措施。2020年7月至2021年6月的132例患者作为观察组,按照标准操作程序进行围术期护理。比较两组患者手术体位安置用时,机器人使用时间,围术期意外事件发生率及医生满意度。结果对照组术前体位安置所需时间、机器人使用时间及机器人运行意外事件发生率显著短于或低于对照组,医生满意度显著高于对照组(均P<0.05)。结论天玑骨科机器人辅助脊柱手术护理标准操作程序的建立有效规范了手术室护士的护理行为,可提升手术室工作效率与护理质量。

Selective Hydrogenation of Maleic Anhydride to Succinic Anhydride over Nickel Catalyst Supported on Carbon Microspheres

The colloidal carbon microspheres(CMS)were prepared by the hydrothermal method.The nickel catalysts supported on carbon microspheres(Ni/CMS)were further prepared and were characterized by the Fourier transform infrared spectroscopy(FTIR),the X-ray diffraction(XRD),the scanning electron microscopy(SEM),the transmission electron microscopy(TEM),and the N_(2)adsorption technique.The selective hydrogenation of maleic anhydride(MA)to succinic anhydride(SA)over the Ni/CMS catalysts was investigated.The results indicated that the Ni/CMS catalyst,which was prepared with glucose as carbon source and calcined at 500℃,exhibited the best performance.The hydrogen pressure,reaction temperature,and reaction time could significantly affect the conversion of maleic anhydride during the hydrogenation reaction.A 98.4%conversion of MA and an 100%selectivity to SA were achieved over the Ni/CMS catalyst in acetic anhydride solvent under mild conditions covering a temperature of 90℃,a H2 pressure of 1.0 MPa,and a reaction time of 3 h.

A Highly Efficient and Selective Water-Soluble Bimetallic Catalyst for Hydrogenation of Chloronitrobenzene to Chloroaniline

Selective hydrogenation of chloronitrobenzene(CNB) to chloroaniline(CAN) catalyzed by water-soluble Ru/Pt bimetallic catalyst in an aqueous-organic biphasic system was studied. It was found that the catalytic activity increased obviously due to the addition of platinum. Ru/Pt bimetallic catalysts exhibited a strong synergistic effect when the molar ratio of Pt was in the range of 5%—80%. Under the mild conditions including a temperature of 25 ℃, a hydrogen pressure of 1.0 MPa and a Pt molar ratio of 20%, the conversion of p-chloronitrobenzene(p-CNB) reached 99.9%, with the selectivity to p-chloroaniline(p-CAN) equating to 99.4%. The Ru/Pt catalyst also showed high activity and selectivity for the hydrogenation of other chloro- and dichloro-nitrobenzenes with different substituted positions. In addition, the catalyst can be recycled five times without significant loss of activity.

Promotional Effect of CoO(OH) on Selective Hydrogenation of Maleic Anhydride to γ-Butyrolactone over Supported Ruthenium Catalyst

A decorated ruthenium catalyst was prepared by the coprecipitation method and used for the selective hydrogenation of maleic anhydride(MA) to γ-butyrolactone(GBL). The as-prepared catalyst was characterized by XRD, TGDTG and N2 adsorption techniques. The characterization tests revealed that the catalyst carrier was composed of monoclinic zirconia(m-ZrO2) and hydroxyl cobalt oxide(CoO(OH)). The hydrogenation results showed that the content of CoO(OH), the reaction temperature, the hydrogen pressure and the reaction time significantly affected the catalytic selectivity to GBL. The promotional effect of CoO(OH) was remarkable, which led to an obvious increase in GBL selectivity. An 100% MA conversion and 92.0% selectivity to GBL were achieved over the Ru/ZrO2-CoO(OH)(35%) catalyst in water solvent under the conditions involving a reaction temperature of 180 ℃, a hydrogen pressure of 3.0 MPa, and a reaction time of 6 h.

新能源汽车VCU诊断软件系统开发

近年来,随着新能源汽车技术特别是智能化汽车技术的发展,汽车电子领域发生了重大的变革—汽车电子系统日趋复杂,电控元器件日益增加。汽车电子的变革导致了汽车软件开发平台化及标准流程化占据了更重要地位。对汽车整车控制器(VCU)软件开发,功能安全及诊断模块的开发需要对更多的电子控制单元进行诊断监控,保证车辆的安全与舒适性。基于此,文章对汽车诊断功能软件、平台化的软件开放式架构、功能安全评估手段进行了深入的研究。

多行车非对称平衡载荷吊装技术

为解决生产车间重型构件吊运难题,以长兴分公司锌锅吊运项目为例,创新性地设计多行车非对称平衡载荷吊装技术锌锅的技术方案,并通过工艺强度计算软件校核了该方案的施工可行性。该方案可解决锌锅吊运问题,为车间设备起吊重型设备提供新的思路,可供类似案例借鉴和参考。

间歇式充气加压泵对腹腔镜直肠癌患者下肢深静脉血流变化的影响

目的 探讨间歇式充气加压泵对腹腔镜直肠癌根治术患者术中下肢深静脉血流的影响效果。方法 选取2017年9月至2019年2月在上海交通大学医学院附属仁济医院东院接受腹腔镜直肠癌根治手术患者82例,随机分为试验组36例和对照组46例。对照组采用常规护理,试验组术中采用间歇式充气加压泵。2组均在截石位摆放前及手术结束双下肢复位前采用彩色多普勒超声诊断设备检测股静脉血管内径(mm)、最大血流速度(cm/s)及血流量(ml/s),比较分析2组患者临床资料与术前术后下肢静脉血流动力学变化的相关关系。结果 2组患者在术前术后股静脉流速、流量及管径差值的血流动力学变化比较,差异均有统计学意义(P<0.01)。结论 应用间歇式充气加压泵后能有效改善腹腔镜直肠癌根治患者围手术期下肢静脉的血液流变学变化,改善血液循环。通过血流动力学监测,为预防腔镜直肠癌根治患者术后下肢深静脉血栓的发生提供理论依据。

微信群形式的同伴支持教育对社区2型糖尿病患者代谢指标及自我管理行为的影响

目的 探讨微信群形式的同伴支持教育对社区2型糖尿病患者的代谢指标及自我管理行为的影响.方法 采用随机数字表法将2016年1～10月宁波第四医院2型糖尿病患者78例分为观察组38例和对照组40例,观察组利用微信群实行同伴支持教育,对照组给予常规糖尿病教育.通过12个月的干预,比较两组干预前后血糖、糖化血红蛋白及自我管理行为的变化.结果 干预前后：对照组的空腹血糖[（7.49 ± 0.42）mmol/L比（8.73 ±1.34）mmol/L,t＝5.88,P＜0.05]、餐后2 h血糖[（11.13 ±1.71）mmol/L比（15.26 ± 2.86）mmol/L,t＝12.08,P＜0.05]、糖化血红蛋白[（6.94 ±0.40）%比（8.14 ±0.70）%,t＝13.33,P＜0.05]及自我管理行为[（20.65 ±1.70）分比（11.65 ±1.41）分,t＝-24.89,P＜0.05]均有所改善;观察组的空腹血糖[（6.33 ±0.50）mmol/L比（8.35 ±1.06）mmol/L,t＝11.77,P＜0.05]、餐后2 h血糖[（9.84 ±0.59）mmol/L比（14.5 ±2.46）mmol/L,t＝12.42,P＜0.05]、糖化血红蛋白[（6.37 ±0.35）%比（7.94 ±0.57）%,t＝16.84, P＜0.05]及自我管理行为[（31.05 ±1.66）分比（11.42 ±1.24）分,t＝-72.59,P＜0.05]均有所改善,且观察组改善更为明显.干预后,观察组空腹血糖[（6.33 ±0.50） mmol/L],明显低于对照组空腹血糖[（7.49 ± 0.42）mmol/L]（t＝11.14,P＜0.05）;糖化血红蛋白[（6.37 ±0.35）%]较对照组[（6.94 ±0.40）%]下降更明显（t＝6.72,P＜0.05）;自我管理水平[（31 ±1.66）分]明显高于对照组[（20.65 ±1.70）分]（t＝-27.30,P＜0.05）.结论 微信群形式的同伴支持教育可以提高2型糖尿病患者自我管理水平,更好地控制血糖,使糖化血红蛋白达标率更高.

同伴支持对2型糖尿病患者血糖管理的影响

目的 探讨同伴支持对2型糖尿病患者血糖管理的影响.方法 选取2017年4～12月宁波市第四人民医院内分泌科收住院的所有符合条件的2型糖尿病患者,将1～9床患者作为观察组,10～20床患者作为对照组,采取随机数字表法分配床位.两组患者均给予常规糖尿病健康教育,观察组同时给予同伴支持教育,采用t检验,比较两组患者的平均住院费用、平均住院时间.结果 观察组平均住院费用为（6218.48±1432.75）元,对照组为（6913.32±1426.34）元,观察组平均住院时间为（6.49±1.91）d,对照组（7.41±1.99）d,两组差异均有统计学意义（t=-4.480、-4.347,均P〈0.01）.结论 同伴支持应用于住院2型糖尿病患者的血糖管理可有效提高健康教育效果,减少住院费用,缩短住院周期.