Collective Effect in Hierarchical Porous MOFs Combining Single Atoms and Nanoparticles for Enhanced CO Photoreduction to CO.

Reasonable construction of atomically accurate photocatalysts is the key to building efficient photocatalytic systems. Herein, we propose a collective effects strategy that enables the consolidation of both cobalt single atoms (Co) and nickel nanoparticles (Ni) in hierarchical porous MOFs for the foundational features for the preparation of high-performance photocatalysts. Among them, the optimal sample Co/Al-bpydc/Ni achieved a CO generation rate of 12.

Clustering-Resistant Cu Single Atoms on Porous Au Nanoparticles Supported by TiO for Sustainable Photoconversion of CO into CH.

Photocatalysts based on single atoms (SAs) modification can lead to unprecedented reactivity with recent advances. However, the deactivation of SAs-modified photocatalysts remains a critical challenge in the field of photocatalytic CO reduction. In this study, we unveil the detrimental effect of CO intermediates on Cu single atoms (Cu-SAs) during photocatalytic CO reduction, leading to clustering and deactivation on TiO.

Distribution characteristics and influencing factors of household consumption carbon emissions in China from a spatial perspective.

Household consumption carbon emissions (HCCEs) have become the main growth point of China's carbon emissions in the future. It is important to investigate the factors affecting the demand-side carbon emissions in order to find the accurate entry point of emission reduction and achieve carbon peaking and carbon neutrality goals. Different from previous studies, this study analyzed the spatial and temporal evolution characteristics of provincial HCCEs in China from a spatial perspective by using the Theil index and spatial auto-correlation and explored the key influencing factors and spatial spillover effects of HCCEs in different regions by using an econometric model.

High performance C-A-S-H seeds from fly ash-carbide slag for activating lithium slag towards a low carbon binder.

In this work, one-step synthesis of high-performance C-A-S-H (calcium alumina silicate hydrate) seeds from low-calcium fly ash (FA) and carbide slag (CS) by 7 days of mechanochemical mixing was proposed and used to activate lithium slag (LS) cement. The results showed that the seeding effect of C-A-S-H seeds was increased with the increasing Ca/Si (i.e.

Empirical research on household consumption carbon emissions and key impact factors in urban and rural China.

The analysis of household consumption carbon emissions (HCCEs), a significant source of CO emissions, is essential to achieving China's carbon peak before 2030 and carbon neutrality before 2060. Based on the calculation of urban and rural HCCEs during 2005-2019, the differences between urban and rural areas, spatial-temporal pattern and agglomeration characteristics of HCCEs were analyzed, and the panel quantile STIRPAT model was constructed to empirically test the influence of socioeconomic factors on urban and rural HCCEs at different quantile levels. The results indicate that, first, China's HCCEs are generally growing, indirect HCCEs are more than direct HCCEs, urban HCCEs are far more than rural, and the gap has a growing trend.

Robust flexural performance and fracture behavior of TiO decorated densified bamboo as sustainable structural materials.

High-performance, fast-growing natural materials with sustainable and functional features currently arouse significant attention. Here, facile processing, involving delignification, in situ hydrothermal synthesis of TiO and pressure densification, is employed to transform natural bamboo into a high-performance structural material. The resulting TiO-decorated densified bamboo exhibits high flexural strength and elastic stiffness, with both properties more than double that of natural bamboo.

Evaluation of the Social Effects of Enterprise Carbon Accounts Based on Variable Weight CFPR Fuzzy VIKOR.

The carbon account is a digital path for an enterprise to achieve low-carbon transformation and high-quality sustainable development under the 'dual carbon' strategy. The carbon account has a good social effect while generating economic benefits. An evaluation index system of the social effects of enterprise carbon accounts has been established, including the concepts of energy conservation and carbon reduction, contributions, technological innovation, and customer trust.

Precipitation Behavior during Aging Operations in an Ultrafine-Grained Al-Cu-Mg Alloy Produced by High-Strain-Rate Processing.

An ultrafine-grained (UFG) Al-Cu-Mg alloy (AA2024) was produced by surface mechanical grinding treatment (SMGT) with a high strain rate, and the precipitation behavior inside the grain and at the grain boundary was investigated. During SMGT, element segregation at the boundary was rarely observed, since the solute atoms were impeded by dislocations produced during SMGT. During early aging, the atomic fraction of Cu at the grain boundary with SMGT alloys was approximately 2.

The Influence of Different Microstructure on Tensile Deformation and Acoustic Emission Behaviors of Low-Alloy Steel.

The effect of different microstructures, obtained under different tempering temperatures on acoustic emission (AE) characteristics and source mechanisms during tensile deformation, was investigated in this study. Different heat treatments were carried out on hot-rolled low-alloy steels to obtain different microstructures (ferrite/pearlite, tempered martensite and tempered sorbite) and the AE was used to monitor the deformation and fracture process of samples of different types (BM, 200 °C tempered and 600 °C tempered). The results showed that the microstructure had different influences on the high amplitude burst-type signals and low amplitude continuous-type signals during the deformation and fracture process of low-alloy steels.

The Effects of Grain Size and Twins Density on High Temperature Oxidation Behavior of Nickel-Based Superalloy GH738.

In the present study, surface treatment techniques such as room temperature machining (RTM) and low temperature burnishing (LTB) processing have been used to improve the microstructure of GH738 superalloy. Nano-grains and nano-twins are obtained on the top surface of RTM and LTB specimens. It is found that although the grain size of RTM and LTB specimens is almost the same, different types of nano-twins have been produced.

Water effects on the deformation and fracture behaviors of the multi-scaled cellular fibrous bamboo.

Unlabelled: Natural bamboo with different water weight contents (0%, 6% and 22%) had distinguishingly different mechanical properties, where samples with water contents of 22% had tensile strength and elongations increased by ∼30% and ∼200% than the dry (0%), respectively. The deformation and fracture process was synchronously recorded and analyzed with the aid of the acoustic emission (AE), during which there were three kinds of real time fracture behaviors recognized: matrix (multi-walled parenchyma cells) failure, interfacial (fiber/fiber or fiber/parenchyma cell walls) dissociations and fiber breakage. More interfacial dissociations and higher fracture energy were detected as more water was added, since water molecules can make great differences on the bamboo's inner micro-structures and the mechanical properties.

Effects of strain and strain-induced α'-martensite on passive films in AISI 304 austenitic stainless steel.

In this paper, the effects of strain and heat treatment on strain-induced α'-martensite of AISI 304 stainless steel tubes were measured by X-ray diffraction. Moreover, the effects of strain and content of α'-martensite on passivated property on the surface of the material in borate buffer solution were evaluated by electrochemical technique. The results showed that the volume fraction of α'-martensite increased gradually with the increase of tensile strain for as-received and solid solution samples.