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Qingwei Shi
School of Management Science and Real Estate, Chongqing University, Chongqing 400045, China

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Journal article
Published: 25 June 2021 in Chemosensors
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As an extremely harmful gas, H2S gas is the major pollutant in construction waste landfill. Herein, a one-dimensional oxide nanomaterial was produced from a simple wet chemical method to serve as a H2S gas sensing material. The SEM observation indicates that the nanomaterial with network structure is constructed by a lot of nanowires with an approximate diameter from 24 nm to 40 nm. The sensing film was formed on a ceramic substrate using a slurry composed of the as-prepared network nanowires. Furthermore, a gas sensing measurement was carried out to determine the gas sensing performances towards the H2S gas. The detection results at different working temperature towards various gas concentrations demonstrate that the network nanowires-based sensor exhibits a higher gas response to H2S as compared to that of the rod-like one. The optimum working temperature of the network and rod-like nanomaterials is both 300 °C, and the corresponding maximum gas response is 24.4 and 13.6, respectively. Namely, the gas response of the network-based gas sensor is almost larger than that of the rod-like oxide. Moreover, the network nanowires-based gas sensor display a faster gas response and recovery speed. In addition, the fabricated gas sensors all exhibit excellent repeatability. Such improved sensing properties may offer a promising potential to realize an efficient detection of harmful H2S gas released from construction waste landfill.

ACS Style

Pengyu Ren; Qingwei Shi; Lingling Qi. A Gas Sensor Based on Network Nanowire for H2S Monitor in Construction Waste Landfill. Chemosensors 2021, 9, 156 .

AMA Style

Pengyu Ren, Qingwei Shi, Lingling Qi. A Gas Sensor Based on Network Nanowire for H2S Monitor in Construction Waste Landfill. Chemosensors. 2021; 9 (7):156.

Chicago/Turabian Style

Pengyu Ren; Qingwei Shi; Lingling Qi. 2021. "A Gas Sensor Based on Network Nanowire for H2S Monitor in Construction Waste Landfill." Chemosensors 9, no. 7: 156.

Journal article
Published: 14 December 2020 in Sustainability
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The improvement of the energy and carbon emission efficiency of activities in the building sector is the key to China’s realization of the Paris Agreement. We can explore effective emission abatement approaches for the building sector by evaluating the carbon emissions and energy efficiency of construction activities, measuring the emission abatement potential of construction activities across the country and regions, and measuring the marginal abatement cost (MAC) of China and various regions. This study calculates the energy and carbon emissions performance of the building sector of 30 provinces and regions in China from 2005 to 2015, measures the dynamic changes in the energy-saving potential and carbon emission performance of the building sector, conducts relevant verification, and estimates the MAC of the building sector by using the slacks-based measure-directional distance function. The level of energy consumption per unit of the building sector of China has been decreasing yearly, but the energy structure has changed minimally (considering that clean energy is used). The total factor technical efficiency of the building sector of various provinces, cities, and regions is generally low, as verified in the evaluation of the energy-saving and emission abatement potential of the building sector of China. The energy saving and emission abatement of the building sector of China have great potential—that is, in approximately 50% of the total emissions of the building sector of China. In particular, Northeast and North China account for more than 50% of the total energy-saving and emission abatement potential. The study of the CO2 emissions and MAC of the building sector indicates that the larger the CO2 emissions are, the smaller MAC will be. The emission abatement efficiency is proportional to MAC. Based on this research, it can be more equitable and effective in formulating provincial emission reduction policy targets at the national level, and can maximize the contribution of the building sector of various provinces to the national carbon emission reduction.

ACS Style

Qingwei Shi; Hong Ren; Weiguang Cai; Jingxin Gao. How to Set the Proper CO2 Reduction Targets for the Provincial Building Sector of China? Sustainability 2020, 12, 10432 .

AMA Style

Qingwei Shi, Hong Ren, Weiguang Cai, Jingxin Gao. How to Set the Proper CO2 Reduction Targets for the Provincial Building Sector of China? Sustainability. 2020; 12 (24):10432.

Chicago/Turabian Style

Qingwei Shi; Hong Ren; Weiguang Cai; Jingxin Gao. 2020. "How to Set the Proper CO2 Reduction Targets for the Provincial Building Sector of China?" Sustainability 12, no. 24: 10432.

Journal article
Published: 30 March 2020 in Sustainability
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The role of urban residential buildings (URBs) in the carbon reduction goal of China is becoming increasingly important because of the rising energy consumption and carbon emission of such buildings in the region. Considering the increasing spatial interaction of the carbon emission of URBs (URBCE) in the region, this study investigates the influence of climate and economic factors on the URBCE in North and South China. First, the URBCE is calculated by using a decomposition energy balance table based on the carbon emission coefficient of electric and thermal power, thereby improving the estimation of the basic data of URBCE. Second, the influence of economic and climatic factors on the URBCE intensity in 30 provinces of China is explored by using a spatial econometric model. Results show that the URBCE intensity in China had a spatial autocorrelation from 2000 to 2016. Climatic and economic factors have great differences in the degree and direction of influencing the URBCE intensity in the country. Formulating emission reduction policies for climate or economic zones is more scientific and effective than developing national policies. Among these factors, urbanization rate, climate, and GDP per capita have a significant positive impact on the URBCE intensity in the region, whereas other factors have varying degrees of negative impact. In addition, climate, consumption level, and building area have significant spatial spillover effects on URBCE intensity, whereas other factors do not pass the significance test. Relevant conclusions should be given special attention by policymakers.

ACS Style

Qingwei Shi; Jingxin Gao; Xia Wang; Hong Ren; Weiguang Cai; Shi Qingwei. Temporal and Spatial Variability of Carbon Emission Intensity of Urban Residential Buildings: Testing the Effect of Economics and Geographic Location in China. Sustainability 2020, 12, 2695 .

AMA Style

Qingwei Shi, Jingxin Gao, Xia Wang, Hong Ren, Weiguang Cai, Shi Qingwei. Temporal and Spatial Variability of Carbon Emission Intensity of Urban Residential Buildings: Testing the Effect of Economics and Geographic Location in China. Sustainability. 2020; 12 (7):2695.

Chicago/Turabian Style

Qingwei Shi; Jingxin Gao; Xia Wang; Hong Ren; Weiguang Cai; Shi Qingwei. 2020. "Temporal and Spatial Variability of Carbon Emission Intensity of Urban Residential Buildings: Testing the Effect of Economics and Geographic Location in China." Sustainability 12, no. 7: 2695.