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Attitudes Toward People Who Stutter in the Chinese Context: An Exploratory Study on the Impact of Knowledge Sources
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作者 Ran AN Judith D.OXLEY John A.TETNOWSKI 《Chinese Journal of Applied Linguistics》 2024年第4期591-611,687,共22页
The public’s attitudes can affect the experience of stuttering of people who stutter.This study investigated the attitudes held by the public about people who stutter in China.A web-based written survey with closed a... The public’s attitudes can affect the experience of stuttering of people who stutter.This study investigated the attitudes held by the public about people who stutter in China.A web-based written survey with closed and open-ended questions was implemented to develop a rich understanding.One hundred and two respondents in 26 provinces and 3 municipalities provided comments on people who stutter in their life aspects such as personality,speech,social life,work,life participation,education,dating and marriage,capability,and communication skills.The predominantly negative attitudes towards the overall domains were identified.Attitudes to people who stutter varied according to the different sources of knowledge.Familiarity with people who stutter might reduce stereotypes.However,knowledge from the media might aggravate stereotypes.Implications and future research orientation were also discussed. 展开更多
关键词 public’s attitudes people who stutter personality communication skills FAMILIARITY media
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Strengthening Active Aging through Older People’s Association and Economic Activity of the Older People in Nepal
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作者 Hom Nath Chalise James Brightman 《Advances in Aging Research》 CAS 2024年第2期15-24,共10页
Aging is a natural lifelong process ending in death. Many older people are living in poverty. Older people are generally considered dependent on others as they grow older. The purpose of this article is to explore the... Aging is a natural lifelong process ending in death. Many older people are living in poverty. Older people are generally considered dependent on others as they grow older. The purpose of this article is to explore the entrepreneurship activities of Nepalese older adults. Data for this study were collected from the project Help Age International (HAI) implemented in Nepal. Qualitative data observations and interviews were used to collect data. The findings of this study show the formation of the Older People’s Association (OPA) has supported many older people to participate outside the home in various social activities. Moreover, regular deposits through OPAs offer little help. OPAs support older people in their need of financial support to implement minor entrepreneurship. Older people who received support were pleased and were actively involved in their activities and also regularly deposited money in them. Subsequently, older people’s participation in social activities has increased and also helped to lower elderly abuse, loneliness, and depression. Local governments should promote such activities which will help with healthy aging. 展开更多
关键词 Aging in Nepal Active Aging Older peoples Association Older people Healthy Aging
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Four Dimensions of Integrating Chinese Culture Into College English Teaching From the Perspective of Tyler’s Basic Principles
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作者 CHEN Lijuan 《Sino-US English Teaching》 2024年第5期232-237,共6页
Integrating Chinese culture into college English can not only enhance students’humanities literacy and cultivate their cultural confidence,but also facilitate the inheritance and international dissemination of Chines... Integrating Chinese culture into college English can not only enhance students’humanities literacy and cultivate their cultural confidence,but also facilitate the inheritance and international dissemination of Chinese culture.Taking Tyler’s curriculum framework as the starting point,this paper analyzes some factors that affect the integration of Chinese culture into the college English teaching and proposes some strategies for the integration of Chinese culture into college English teaching by innovating teaching objectives,enriching teaching contents,transforming modes of course delivery,and reconstructing the assessment system. 展开更多
关键词 Tyler’s basic principles Chinese culture college English
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Historical review and reflections on the participation of acupuncture and moxibustion in the treatment of epidemics in the People’s Republic of China (from 1950 until now)
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作者 Xiong Xiao 《History & Philosophy of Medicine》 2024年第3期1-5,共5页
Since the establishment of the People’s Republic of China, both the Communist Party and the government have placed great emphasis on the advancement of traditional Chinese medicine. Acupuncture and moxibustion have b... Since the establishment of the People’s Republic of China, both the Communist Party and the government have placed great emphasis on the advancement of traditional Chinese medicine. Acupuncture and moxibustion have been actively involved in combating major epidemics such as malaria, schistosomiasis, and COVID-19. This article conducts a historical review of these three significant cases to elucidate how the acupuncture community has effectively utilized its unique advantages and characteristics through theoretical discussions, clinical practices, experimental research, as well as receiving administrative leadership and political support from the Communist Party of China and government. We provide an objective evaluation of their effectiveness while summarizing historical experiences to serve as a reference for future utilization of acupuncture and moxibustion therapy in epidemic relief efforts. Additionally, propose four suggestions: strengthening Party leadership and enhancing political support;timely summarization of experiences to establish programs and systems;deepening scientific research by integrating experimental findings with clinical practice;focusing on public awareness campaigns and education to solidify grassroots foundations. 展开更多
关键词 acupuncture and moxibustion the peoples Republic of China EPIDEMICs MALARIA sCHIsTOsOMIAsIs COVID-19
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Implement Constitutional Principles to Uncover Tort Cases——An interview with Wang Zhenchuan, deputy chief procurator of the Supreme People's Procuratorate
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作者 STAFF REPORTER CHEN CHUN’AN 《The Journal of Human Rights》 2005年第2期8-12,共5页
EDITOR'S NOTE: Since May 2004, the people's procuratorates in China have concentrated their efforts on uncovering cases of encroaching upon human rights by government functionaries by abusing their power. The ... EDITOR'S NOTE: Since May 2004, the people's procuratorates in China have concentrated their efforts on uncovering cases of encroaching upon human rights by government functionaries by abusing their power. The move has aroused extensive attention. On this, our staff reporter interviewed Deputy Chief Procurator Wang Zhenchuan, who is in charge of the campaign against human rights violations. 展开更多
关键词 over An interview with Wang Zhenchuan Implement Constitutional principles to Uncover Tort Cases deputy chief procurator of the supreme peoples Procuratorate WANG
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Flavor Amidst Plainness:An Examination of the Subjectivity of the“People’s Films”From the Perspective of Classical Aesthetics
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作者 Yang Guang 《Contemporary Social Sciences》 2023年第3期132-144,共13页
The“People’s Films,”when examined from the perspective of classical aesthetics,present a unique visual style that creates artistic conceptions through sparse filming and deliver a scenery-based ideology through bac... The“People’s Films,”when examined from the perspective of classical aesthetics,present a unique visual style that creates artistic conceptions through sparse filming and deliver a scenery-based ideology through background shots,contributing to the overall aesthetic taste dominated by plainness.Chinese national aesthetic tastes,distinguished by implicitness,symbolism,and ethereality,have the magical power to present charming conceptions via plain and simple scenes,thus endowing the“People’s Films”with natural,plain,and harmonious frames that are unique to China.Behind the silent and plain scenes are representations of personal cultivation and essential values cherished by the Chinese people,which are achieved via the momentary presence and entirety of scenes photographed in the films,delivering an internal transcendence of people’s consciousness. 展开更多
关键词 plainness classical aesthetics the“peoples Films subjectivity
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People's Well-rounded Development:The Value Orientation of Common Prosperity in the New Era
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作者 张晗 QIAN Chuijun 《The Journal of Human Rights》 2023年第3期558-575,共18页
Achieving common prosperity for all is an important feature of Chinese modernization and an essential requirement of socialism with Chinese characteristics,with the core value orientation of promoting the people’s we... Achieving common prosperity for all is an important feature of Chinese modernization and an essential requirement of socialism with Chinese characteristics,with the core value orientation of promoting the people’s well-rounded development.This reflects the close relationship between people’s well-rounded development and common prosperity and implies that common prosperity is not just an economic issue,but also a political matter,a moral subject,and a human rights goal.Being“people-centered”is the core positioning of common prosperity,with its inherent collective and individual attributes.In terms of the object dimension of prosperity,it encompasses a wide range of rights such as material and spiritual well-being,which are advanced in a coordinated manner,and a deepening level of guarantee gradually improving.In the practical concept of“shared development,”it emphasizes the unity of state obligations and individual responsibilities,as well as the phased approach and promotion of common prosperity through the rule of law.Therefore,the essence of common prosperity lies in shifting from a“material-centered”perspective to a“people’s well-rounded development-centered”perspective.It combines the principles of fairness and inclusiveness with the recognition of diverse developmental needs.The focus is on enhancing the subjective initiative of the people,aiming to truly achieve the happiness of the people and promote people’s well-rounded development through the realization of“common prosperity.” 展开更多
关键词 common prosperity peoples well-rounded development people-centered shared development subjective initiative
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Human Rights in China:Exploration and Development of Whole-process People’s Democracy
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作者 李君如 《The Journal of Human Rights》 2023年第4期709-721,共13页
Whole-process people’s democracy represents a new exploration of socialism with Chinese characteristics for a new era as well as a novel and important method for protecting the human rights of the Chinese people.It i... Whole-process people’s democracy represents a new exploration of socialism with Chinese characteristics for a new era as well as a novel and important method for protecting the human rights of the Chinese people.It is conducive to solving a multitude of problems hindering the protection of civil rights and political rights.The greatest highlight of whole-process people’s democracy is that the people are the masters of their own country and exercise the power to govern the state through“extensive participation and consultation.”China’s experience and approaches in advancing whole-process people’s democracy provide a reference for other countries. 展开更多
关键词 whole-process peoples democracy human rights in China the 20th National Congress of the Communist Party of China
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主流媒体视觉表达中的国家形象建构——基于《人民日报》海外版抖音“People's Daily”的分析
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作者 高旻珩 梁妤 《媒体融合新观察》 2023年第2期39-41,共3页
讲好中国故事,在国际社会积极传播中国形象,对提高中国在国际社会上的话语权具有积极的现实意义。研究发现,《人民日报》海外版抖音“People’s Daily”立足中国历史、地理、文化、艺术以及人民故事等丰富资源,涉及国内外多元声音,巧妙... 讲好中国故事,在国际社会积极传播中国形象,对提高中国在国际社会上的话语权具有积极的现实意义。研究发现,《人民日报》海外版抖音“People’s Daily”立足中国历史、地理、文化、艺术以及人民故事等丰富资源,涉及国内外多元声音,巧妙运用传播技巧多方位建构中国的立体国家形象。 展开更多
关键词 国家形象 《人民日报》海外版抖音“peoples Daily” 国际传播
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The Utilization of People Oriented Principle on Class Management of Head Teacher in College 被引量:4
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作者 王彬 《边疆经济与文化》 2009年第9期144-145,共2页
以人为本,是贯彻和落实科学发展观的一个基本要求。体现在高校班主任班级管理中,就是要树立以学生为本的管理理念,尊重学生的主体地位,一切从学生的实际出发。根据学生的个性特点和思想动态进行管理,创新班级管理方式,提高班级管... 以人为本,是贯彻和落实科学发展观的一个基本要求。体现在高校班主任班级管理中,就是要树立以学生为本的管理理念,尊重学生的主体地位,一切从学生的实际出发。根据学生的个性特点和思想动态进行管理,创新班级管理方式,提高班级管理质量,增强班级管理的效果,取得班级管理的目标。 展开更多
关键词 以人为本 高校 班级管理
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People’s Daily对我国应对新冠疫情的报道研究 被引量:2
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作者 连少英 王清雨 《青年记者》 北大核心 2021年第4期53-55,共3页
本文用定量与定性相结合的研究方法构建了《人民日报》英文版People’s Daily对我国应对新冠肺炎疫情报道的语料库,从新闻文本、话语实践、社会实践三个维度对其进行批评性话语分析,发现其中或明或暗的意识形态、不甚清晰的权力结构以... 本文用定量与定性相结合的研究方法构建了《人民日报》英文版People’s Daily对我国应对新冠肺炎疫情报道的语料库,从新闻文本、话语实践、社会实践三个维度对其进行批评性话语分析,发现其中或明或暗的意识形态、不甚清晰的权力结构以及政治控制等话语特征,并在此基础上得出相关结论,提出相关建议。 展开更多
关键词 新冠肺炎疫情 peoples Daily 批评性话语分析
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Predicting H2S Oxidative Dehydrogenation over Graphene Oxides from First Principles
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作者 黄斌 陈碧波 陈荣 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第2期143-149,I0001,共8页
Spin-polarized periodic density functional theory was performed to characterize H2S adsorp- tion and dissociation on graphene oxides (GO) surface. The comprehensive reaction network of H2S oxidation with epoxy and h... Spin-polarized periodic density functional theory was performed to characterize H2S adsorp- tion and dissociation on graphene oxides (GO) surface. The comprehensive reaction network of H2S oxidation with epoxy and hydroxyl groups of GO was discussed. It is shown that the reduction reaction is mainly governed by epoxide ring opening and hydroxyl hydrogenation which is initiated by H transfer from H2S or its derivatives, hlrthermore, the presence of another OH group at the opposite side relative to the adsorbed H2S activates the oxygen group to facilitate epoxide ring opening and hydroxyl hydrogenation. For H2S interaction with -O and -OH groups adsorption on each side of graphene, the pathway is a favorable reaction path by the introduction of intermediate states, the predicted energy barriers are 3.2 and 10.4 kcal/mol, respectively, the second H transfer is tile rate-determining step in the whole reaction process. In addition, our calculations suggest that both epoxy and hydroxyl groups can enhance tile binding of S to the C-C bonds and the effect of hydroxyl group is more local than that of the epoxy. 展开更多
关键词 First principles H2s ADsORPTION DIssOCIATION
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湿气环境中CO_(2)-H_(2)S在α-Fe(110)密排面上吸附与点蚀机理研究
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作者 李金灵 马文骏 +2 位作者 朱世东 屈撑囤 付安庆 《表面技术》 EI CAS CSCD 北大核心 2024年第20期82-93,共12页
目的从微观尺度探究CO_(2)-H_(2)S(CO_(2)和H_(2)S共存)在湿气管道顶部的吸附特性,进而揭示点蚀机理。方法基于密度泛函理论的第一性原理,利用Materials Studio构建CO_(2)、H_(2)S和CO_(2)-H_(2)S在α-Fe(110)密排面的吸附模型,对CO_(2)... 目的从微观尺度探究CO_(2)-H_(2)S(CO_(2)和H_(2)S共存)在湿气管道顶部的吸附特性,进而揭示点蚀机理。方法基于密度泛函理论的第一性原理,利用Materials Studio构建CO_(2)、H_(2)S和CO_(2)-H_(2)S在α-Fe(110)密排面的吸附模型,对CO_(2)、H_(2)S和CO_(2)-H_(2)S在α-Fe(110)面的吸附能、局域态密度、分波态密度和差分电荷密度进行仿真;利用高温高压釜模拟CO_(2)-H_(2)S-Cl^(-)腐蚀环境,分析L360钢在湿气环境中的腐蚀行为;最后,揭示含Cl^(-)湿气管道顶部CO_(2)-H_(2)S吸附机制与点蚀机理。结果CO_(2)、H_(2)S、CO_(2)-H_(2)S及CO_(2)-H_(2)S-Cl^(-)在最稳定位置时的吸附能分别为-4.065、-3.961、-8.538、-12.775e V,表明相较于CO_(2)与H_(2)S单独吸附,CO_(2)-H_(2)S在α-Fe(110)面的吸附能更负,Cl^(-)会进一步降低CO_(2)-H_(2)S的吸附能;且CO_(2)在与H_(2)S竞争环境电子中占优势;Cl^(-)会使CO_(2)-H_(2)S的局域态密度峰值降低,转移趋势为失去电子,基体和腐蚀介质的电子向着低能级跃迁释放出更多能量,进而加强了Fe与CO_(2)-H_(2)S间的化学键强度;Cl^(-)的2p轨道与Fe的3d轨道在-6.8 eV和-5.7 eV发生重叠,Cl^(-)被吸附到Fe表面并与Fe形成化学键生成氯化物,进而改变腐蚀产物膜的组分与结构,削弱产物膜的致密性和稳定性,减弱腐蚀阻抗力。在含Cl^(-)湿气的CO_(2)-H_(2)S环境中,液相中的Cl^(-)浓度升高,使L360钢的气相平均腐蚀速率逐渐增大,最高达2.935mm/a,点蚀越发严重。结论CO_(2)与H_(2)S在α-Fe(110)面吸附存在一定的协同和竞争作用,协同促进金属的腐蚀,FeCO3会优先沉积成膜,但H_(2)S会抑制FeCO3的生长,腐蚀产物以FeS为主;Cl^(-)会增强CO_(2)-H_(2)S与α-Fe(110)面间的作用力,弱化腐蚀产物膜层的保护性,进一步加速金属腐蚀、尤其是点蚀。 展开更多
关键词 CO_(2)-H_(2)s Cl^(-) 第一性原理 α-Fe(110)密排面 吸附特征 腐蚀机理
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S-T-S混合式循环互助教学模式用于少学时“化工原理”课程
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作者 吕玲 《教育教学论坛》 2024年第31期157-160,共4页
“化工原理”课程是化工及相关专业的专业基础课程,相关专业的学时少,课程难,需重点解决的问题是“三多”“三不愿”“三不明”。针对痛点问题,提出了线上线下混合式循环互助的创新设计思路,包括:教师帮助学生自制课前、课中、课后习题... “化工原理”课程是化工及相关专业的专业基础课程,相关专业的学时少,课程难,需重点解决的问题是“三多”“三不愿”“三不明”。针对痛点问题,提出了线上线下混合式循环互助的创新设计思路,包括:教师帮助学生自制课前、课中、课后习题,学生帮助教师反馈真实学习情况,学生帮助学生组团互助学习。问卷调查和评教结果显示,在一定程度上解决了“三多”“三不愿”的问题;通过建立“助教团队”反馈不同层次学生的学习情况,较好地解决了“三不明”的问题。学生的成绩与教改前相比有明显提高。 展开更多
关键词 线上线下 s-T-s教学模式 化工原理 痛点问题
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H_(2)S在Cr(111)面上吸附与解离的第一性原理研究 被引量:1
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作者 江佐禹 黄本生 +1 位作者 何子涛 罗霞 《原子与分子物理学报》 CAS 北大核心 2024年第2期9-14,共6页
采用了第一性原理研究了H_(2)S在Cr(111)面的吸附解离过程,利用吸附能、吸附构型和偏态密度图(PDOS)研究了H_(2)S及其解离产物在Cr(111)面上的吸附情况,都偏向倾斜吸附在Cr(111)面.同时研究了HS/H和S/H共吸附情况,得到共吸附物质在Cr(1... 采用了第一性原理研究了H_(2)S在Cr(111)面的吸附解离过程,利用吸附能、吸附构型和偏态密度图(PDOS)研究了H_(2)S及其解离产物在Cr(111)面上的吸附情况,都偏向倾斜吸附在Cr(111)面.同时研究了HS/H和S/H共吸附情况,得到共吸附物质在Cr(111)面上有明显的相互作用.最后使用线性同步和二次同步变换方法确定了解离反应的过渡态,了解到第一、二步解离的活化能分别为1.65 eV、0.82 eV,H_(2)S分子在Cr(111)面上的解离过程是放热反应,反应能为-2.90 eV. 展开更多
关键词 H_(2)s Cr(111) 吸附 解离 第一性原理
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Simulation of people's evacuation in tunnel fire 被引量:5
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作者 杨高尚 彭立敏 +1 位作者 张进华 安永林 《Journal of Central South University of Technology》 EI 2006年第3期307-312,共6页
The simulation model Tunev(tunnel evacuation) was developed for people's evacuation in tunnel fire. It contains simple database of the people's behavioral reaction and structure characteristic parameters of tunnel... The simulation model Tunev(tunnel evacuation) was developed for people's evacuation in tunnel fire. It contains simple database of the people's behavioral reaction and structure characteristic parameters of tunnel fireproofing. The model can be used to calculate the total evacuation time in various scenes when fire occurs in the different locations of the tunnel. Combined with fire simulation soft ware CFD- POENICS3.5, Tunev model can be used to calculate the fire danger coming time; by comparing with these two kinds of time, it can be used to assess the safety of the evacuation, and the evacuation process also have a dynamic demo. The simulation results show that the Tunev model can be used to predict the reliability of safe evacuation for people in tunnel fire and provide references for people's safe escape scheme. Some relevant concepts of the model were described and an evacuation simulation of a typical tunnel case, i.e. Xuefeng Mountain Tunnel was performed by using this model. And the model's validation and actual aoolication were also described. 展开更多
关键词 tunnel fire people's evacuation simulation model
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Climate change impact in the Western Himalaya:people's perception and adaptive strategies 被引量:2
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作者 Vikram S.Negi Rakesh K.Maikhuri +2 位作者 Dalbeer Pharswan Shinny Thakur Pitamber P.Dhyani 《Journal of Mountain Science》 SCIE CSCD 2017年第2期403-416,共14页
The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for... The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for sustenance of millions of people in Himalaya and adjoining areas. However, mountain regions worldwide are impacted by climate change and at the same time represent distinctive area for the assessment of climate related impacts. Climate change impacts in Himalayan region have its implications on food production, natural ecosystems,retreat of glacier, water supply, human and animal health and overall human well being. The livelihood and food security of the people inhabited in region largely depend on climate sensitive sectors i.e.agriculture, livestock, forestry and their interlinkages with each other, and has the potential to break down food and nutritional security as well as livelihood support systems. People's perception and understanding of climate can be an important asset when it comes to adaptation to climate change impact;however it is not taken into consideration for the development of policy design and implementation of modern mitigation and adaptation strategies by governments and other civil society organizations.The knowledge of local people and farming communities for rural landscape management and sustainable use of bioresources is gaining credence as a key strategy to cope up with the climate change.Therefore, the present study analyzes the indigenous knowledge of local people and their perceptions on climate change, and also documented adaptation approaches at local level in mountain ecosystem of western Himalaya. The study could be useful to policy makers to design appropriate adaptation strategies to cope up with the impacts of climate change. 展开更多
关键词 Western Himalaya Climate change people's perception Traditional knowledge ADAPTATION
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Liver Transplantation (in Chinese), revised edition, Edited by Shu-Sen Zheng. Pp843. Beijing: People's Medical Publishing House, 2012. ISBN: 978-7-117-15494-9/R.15495. ¥RMB 158 被引量:3
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《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2012年第6期649-649,共1页
Liver Transplantation (in Chinese), revised edition, edited by Professor Shu-Sen Zheng and prefaced by Professor Guo-Wei Sang, has just been published. The revised edition is mainly based on the clinical practice of t... Liver Transplantation (in Chinese), revised edition, edited by Professor Shu-Sen Zheng and prefaced by Professor Guo-Wei Sang, has just been published. The revised edition is mainly based on the clinical practice of the Liver Transplant Center, the First Affiliated Hospital, Zhejiang University and the experience 展开更多
关键词 in Chinese BEIJING Edited by shu-sen Zheng peoples Medical Publishing House Pp843 R.15495 RMB 158
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Climate Change: Trends and People’s Perception in Nepal 被引量:2
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作者 Rohini P. Devkota 《Journal of Environmental Protection》 2014年第4期255-265,共11页
In the context of climate change, the frequency and intensity of extreme events such as floods and droughts will increase which could put tremendous challenges in water resources management in the coming days. While s... In the context of climate change, the frequency and intensity of extreme events such as floods and droughts will increase which could put tremendous challenges in water resources management in the coming days. While scientific knowledge on climate threats and changing climate patterns are essential, it is also important to consider the impacts in relation to how the threats are perceived and handled by local people. This paper intends to assess the trend and people’s perception on temperature and precipitation. Three focus groups’ discussion and a total number of 240 households were interviewed during field visit. The collected information was scaled from the least preferred-1 to the most preferred-5 based on their preferences. The trend of mean of annual average, maximum and minimum temperature indicates that the temperature has increased significantly and precipitation intensity and magnitude are also in increasing trend in the monsoon and postmonsoon seasons which may raise the extreme flood events. These facts were verified with the people’s perception. This finding could be useful for formulation of effective flood management policy and plan in this river basin as well as very applicable for other similar areas. 展开更多
关键词 CLIMATE CHANGE TRENDs peoples PERCEPTION
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用于低浓度H_(2)S室温稳定监测的CsPbBr_(3)@TiO_(2)异质结微晶气体传感器
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作者 逯江浩 黄胜 +4 位作者 陈露 程永超 高莎莎 陶雪钰 顾修全 《人工晶体学报》 CAS 北大核心 2024年第10期1815-1826,共12页
通过简单的溶液法用TiO(Acac)_(2)原位包覆CsPbBr_(3)全无机钙钛矿材料,在400℃加热后直接制成了CsPbBr_(3)@TiO_(2)核壳结构微晶,使用X射线衍射(XRD)、扫描电子显微镜(SEM)、高倍透射电子显微镜(HRTEM)及X射线光电子能谱(XPS)对CsPbBr_... 通过简单的溶液法用TiO(Acac)_(2)原位包覆CsPbBr_(3)全无机钙钛矿材料,在400℃加热后直接制成了CsPbBr_(3)@TiO_(2)核壳结构微晶,使用X射线衍射(XRD)、扫描电子显微镜(SEM)、高倍透射电子显微镜(HRTEM)及X射线光电子能谱(XPS)对CsPbBr_(3)@TiO_(2)微晶的晶体结构、微观形貌、化学组成进行表征。结果表明,原位金属氧化物包覆钙钛矿形成分散良好、大小为4~8μm的球壳结构。用旋涂法在掺氟氧化锡(FTO)电极上构筑了CsPbBr_(3)@TiO_(2)薄膜气体传感器,在室温下测试其对H_(2)S气体的检测灵敏度,结果发现,该传感器对H_(2)S气体的检测下限达25 ppb(1 ppb=10-9),对100 ppb H_(2)S响应/恢复时间为24/21 s,灵敏度为0.59,响应曲线具有良好的循环稳定性。另外,传感器暴露在空气中30 d内的稳定性高于90%,且具有优异的气体选择性和抗湿度干扰性。通过光致发光(PL)光谱、时间分辨光致发光(TRPL)光谱、紫外-可见漫反射光谱(UV-Vis)及紫外光电子能谱(UPS)测试分析了其能带位置、电荷动力学和配位机理,并用氧吸附原理对其传感机理进行了解释。该工作为室温下低浓度H_(2)S气体的稳定监测提供了一种新的思路。 展开更多
关键词 CsPbBr_(3) 钙钛矿 核壳结构 异质结 H_(2)s气体传感器 氧吸附原理
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