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Chinese Chemical Letters 2021年第6期32卷 2038-2042页

作者： Xiaoqian Xie qadeer-ul hassan Huan Lu Fei Rao Jianzhi Gao Gangqiang Zhu School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China School of Geography and Tourism Shaanxi Normal UniversityXi'an 710062China

Surface oxygen vacancy defects and metal deposition on semiconductor photocatalysts play a critical role in photocatalytic *** this work,oxygen-deficient Bi_(2)WO_(6)microspheres have been prepared by a facile ethylene glycol-assisted solvothermal ***0 nanoparticles were reduced by in situ thermaltreatment on Bi_(2)WO_(6)microspheres to obtain Bi^(0)@Bi_(2)WO_(6)-x as well as maintaining the oxygen vacancies(OVs)under N_(2)***,photocatalytic NO oxidation removal activities of these photocatalysts were investigated under visible light irradiation and Bi^(0)@Bi_(2)WO_(6)-x shows the best NO removal activity than other *** photogenerated cha rge separation and trans fe r are promoted by Bi0 nanoparticles deposited on the surface of semiconductor *** defects promote the activation of reactants(H_(2)O and O_(2)),thereby enhancing the formation of the active ***,both OVs defects and Bi0 metal have the characteristics of extending light absorption and enhancing the efficient utilization of solar ***,the photocatalytic NO oxidation mechanism of Bi^(0)@Bi_(2)WO_(6)-xwas investigated by in situ FTIR spectroscopy for reaction intermediates and final *** work furnishes insight into the synthesis strategy and the underlying photocatalytic mecha nism of the surfacemodified Bi^(0)@Bi_(2)WO_(6)-x composite for pollutants removal.

关键词： Bi_(2)WO_(6)microspheres Oxygen vacancies Bi metal Photocatalytic reaction In situ FTIR

Au nanoparticles loaded on hollow BiOCl microstructures boosting CO_(2)photoreduction

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Chinese Chemical Letters 2022年第9期33卷 4385-4388页

作者： Siwen Gong Fei Rao Weibin Zhang qadeer-ul hassan Zhaoqing Liu Jianzhi Gao Jiangbo Lu Mirabbos Hojamberdiev Gangqiang Zhu School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China School of Chemistry and Chemical Engineering Institute of Clean Energy and MaterialsGuangzhou UniversityGuangzhou 510006China Institute of Chemistry Technical University of BerlinBerlin 10623Germany

The BiOCl(BOC)synthesized by the water bath heating method was treated with sodium borohydride(NaBH_(4))to introduce oxygen vacancies(OVs).At the same time,Au nanoparticles were loaded to prepare a series of Au/BiOCl samples with different *** and Au nanoparticles can promote the light absorption of host photocatalyst in the visible *** calculated work function of BiOCl and Au can verify the existence of Ohmic contact between the interface of them,which is conducive to the separation of charge *** a series of photoelectric tests,it was verified experimentally that the separation of charge carriers is indeed *** high-energy hot electrons produced by Au under the surface plasmon resonance(SPR)effect can increase the counts of electrons to participate in the CO_(2)reduction *** for 1.0%-Au/BOC,the yields of CO can reach 43.16μmol g^(−1)h^(−1),which is 6.6 times more than that of ***,loading precious metal on semiconductors is an effective strategy to promote the photocatalytic performance of CO_(2)reduction reactions.

关键词： BiOCl Au nanoparticles Oxygen vacancy Ohmic contact CO_(2)photoreduction

通过实验和理论验证Pt0/SrTiO_(3)-δ复合催化剂双反应路径促进CO_(2)还原

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Chinese Journal of Catalysis 2023年第3期46卷 113-124页

作者：李卓根 qadeer ul hassan 张伟斌朱陆军高健智石先进黄宇刘鹏朱刚强陕西师范大学物理与信息技术学院陕西西安710062 云南师范大学物理和电子信息学院云南昆明650500 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室陕西西安710061

在以H_(2)O为质子源的光催化二氧化碳还原反应(CO_(2)RR)过程中,光解H_(2)O产氢气(H_(2))被认为是一个竞争反应.因此,光催化CO_(2)RR过程需要抑制H_(2)的产生,以提高碳氢产物的选择性和产率.以CO_(2)和H_(2)为反应物的逆水气变换反应(RW... 详细信息

在以H_(2)O为质子源的光催化二氧化碳还原反应(CO_(2)RR)过程中,光解H_(2)O产氢气(H_(2))被认为是一个竞争反应.因此,光催化CO_(2)RR过程需要抑制H_(2)的产生,以提高碳氢产物的选择性和产率.以CO_(2)和H_(2)为反应物的逆水气变换反应(RWGS)是常见的CO_(2)加氢反应,在较高的温度和催化剂作用下生成CO和H_(2)O.目前,光催化CO_(2)RR研究主要聚焦于产物的选择性,而有关光解H_(2)O产生的还原性气体H_(2)在光热效应的促进下成为CO_(2)RR中新的质子源研究较少.光热催化是一种新的高效催化反应方式,在反应过程中需要光照和加热.光照能够促进半导体光生载流子的激发,热效应则能降低反应物分子的活化势垒,并能够促进中间产物的表面迁移以及生成物的脱附.利用光热催化热力学和动力学上的有利条件,为以H_(2)O为质子源的光热催化CO_(2)RR中RWGS反应提供了H_(2)源以及所需的能量.本文合成了具有强电子转移能力、高热稳定性和化学稳定性的Pt纳米颗粒(NPs)负载在具有丰富氧空位(OVs)的SrTiO_(3)-δ纳米片,形成金属-半导体相互作用的Pt-OVs-STO纳米复合催化剂,并利用该纳米复合催化剂系统地研究了以H_(2)O为质子源的光热催化CO_(2)RR的反应路径.结合X射线粉末衍射、X射线光电子能谱、高角度环形暗场和明场球差校正扫描电子显微镜、电子顺磁共振和紫外可见吸收光谱等表征手段,研究了表面负载的Pt^(0)NPs与SrTiO_(3)-δ之间的相互作用.这种金属-半导体之间的强相互作用和独特的电子结构促进了复合半导体结构的光吸收能力,提升了光生载流子的分离以及对反应物分子的吸附.由H_(2)O分解产生的H_(2)能够有效地促进在Pt-OVs-STO纳米复合结构的双路径CO_(2)还原反应:CO_(2)直接质子化和RWGS反应.DFT理论计算结果表明,该纳米复合结构能够有效地促进半导体表面电荷转移和H_(2)生成,并且降低RWGS反应和CO_(2)质子化的反应势垒.综上,本文阐明了在H_(2)O为质子源的光热催化CO_(2)RR中Pt^(0)/SrTiO_(3)-δ纳米复合结构上光解H_(2)O产生的H_(2)和RWGS反应之间的关系,并为后续的CO_(2)RR的研究提供了新视角.

关键词：光热催化析氢反应逆水煤气反应钙钛矿金属-半导体相互作用

多级孔Ti-MOFs负载超细Pd纳米颗粒实现高效光热CO_(2)还原

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Science China Materials 2023年第6期66卷 2317-2328页

作者：吕虹娟 qadeer ul hassan 范书聪王颖安玉蓉朱刚强蒋育澄袁文玉翟全国 School of Chemistry&Chemical Engineering Shaanxi Normal UniversityXi’an 710062China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

设计钛基金属有机骨架(MOF)实现高效光催化CO_(2)还原具有重要意义但仍极具挑战.本文发展了一种新的一步原位水蚀刻方法制备超细Pd纳米颗粒/多级孔Ti-MOFs高效光催化剂,其中水刻蚀在形成多级孔结构的同时也为Pd的锚定提供了丰富位点,进... 详细信息

设计钛基金属有机骨架(MOF)实现高效光催化CO_(2)还原具有重要意义但仍极具挑战.本文发展了一种新的一步原位水蚀刻方法制备超细Pd纳米颗粒/多级孔Ti-MOFs高效光催化剂,其中水刻蚀在形成多级孔结构的同时也为Pd的锚定提供了丰富位点,进而在光还原的作用下一步实现Pd纳米颗粒在MOFs表面和内部的负载.得益于多级孔结构和超细Pd颗粒负载,Pd/hMUV-10在350℃光照下的CO产率高达65.9 mmol g^(-1)h^(-1),比目前最先进的MOF基催化剂高出约两个数量级,并超过大多数已报道的无机半导体基催化剂.在200℃相对温和的条件下,CO的产率也达到3.36 mmol g^(-1)h^(-1).在350℃的连续循环测试中,催化剂活性几乎没有衰减.理论计算表明,Pd负载可增强对CO_(2)的吸附和降低CO_(2)还原能垒,从而实现高效光热CO_(2)还原.本文所报道的Pd/hMUV-10催化剂有望在工业CO_(2)捕获和转化中得到应用.

关键词： Pd纳米颗粒多级孔结构光还原无机半导体能垒光催化循环测试

Effect of body material and temperature variation on the performance of the time delay pyrotechnic compositions

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Defence Technology（防务技术） 2018年第3期14卷 261-265页

作者： Azizullah Khan Abdul qadeer Malik Zulfiqar Hameed Lodhi Zain ul Abdin School of Chemical and Materials Engineering (SCME) National University of Sciences and Technology (NUST)

Significance of body material and temperature variation on burning time and burning rate of Si/Pb O/Pb_3O_4/FG and B/BaCrO_4/FG pyrotechnic delay compositions were experimentally studied. Brass and stainless steel were used as delay body materials. High resolution oscilloscope and a customized chronometer were simultaneously used for the measurement of burning time and burning rate. Results reveal that brass material with controlled column dimensions reduced the variation in burning time of Si/Pb O/Pb_3O_4/FG delay mixture from 7.43% to 4.17% and that of B/Ba CrO_4/FG mixture from 16.83% to 9.39%.Similarly the variation in burning rate was reduced from 7.57% to 4.12% and from 17% to 9.69% for Si/Pb O/Pb_3O_4/FG and B/BaCrO_4/FG mixtures respectively. Si/PbO/Pb_3O_4/FG delay mixture was also subjected to temperature ranging from -54℃ up to+100℃. The burning rate of this composition varied linearly with temperature. Burning rate increased from 28.01 mm/s to 34.38 mm/s when the temperature was varied from -54℃ to +100℃.

关键词：温度变化体材料时间烟火身体表演混合物高分辨率

Enhancing Childhood TB Notifications by Strengthening Linkages with Large Hospitals in Pakistan<br/>—Childhood TB in Large Hospitals, Pakistan

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Journal of Tuberculosis Research 2018年第1期6卷 63-67页

作者： Ali Saeed Mirza Razia Fatima Aashifa Yaqoob Ejaz qadeer Ahmed Wali Afshan Khurshid Mahboob ul Haq Ajay M. V. Kumar National TB Control Program Islamabad Pakistan Provincial TB Control Program Quetta Pakistan Provincial TB Control Program Sindh Pakistan International Union against Tuberculosis and Lung Disease Paris France International Union against Tuberculosis and Lung Disease South-East Asia Office New Delhi India

To improve childhood Tuberculosis management, the National Tuberculosis Program implemented a package of interventions Hospital DOTS linkages (HDL) in 2015 in 144 tertiary and secondary care hospitals across Pakistan. This included systematic engagement of hospital administration and all specialist doctors, staff training and regular facility-based review meetings. HDL was associated with 35% increase in childhood TB notifications in 2015 (versus 2014) in HDL sites as compared to 16% increase in non-HDL sites. The increase was seen across provinces, age-groups and sexes, but did not correlate with presence of Xpert MTB/RIF®?or “screeners” (health workers deployed to screen children for TB).

关键词： Tuberculosis Childhood Tuberculosis Hospital DOTS Linkages Pakistan SORT IT