Photothermal catalytic CO2 reduction has emerged as a promising approach to efficiently utilize solar energy and reduce greenhouse gas emissions. Designing novel catalyst with high activity and selectivity is essential and challenging for practical applications of photothermal CO2 reduction. Herein, we report that natural halloysite nanotubes-supported Ru nanoparticles can boost the photothermal catalytic activity and selectivity of CO2 methanation under continuous flow conditions. The photothermal catalytic performance of optimized catalyst is up to 1704 mmolCH4 gcat−1 h−1 with 93% CH4 selectivity and 68% CO2 conversion, outperforming any other Ru-based catalysts in photothermal CO2 reduction. Mechanistic studies show that the outstanding catalytic performance is mainly attributed to the unique mesoporous tubular structure, excellent ability of light-to-heat and interfacial interactions between the halloysite nanotubes and Ru. This method of utilizing natural minerals as support provides a facile avenue for rational design of abundant and low-cost catalysts for efficient photothermal catalytic CO2 reduction. 

Natural halloysite nanotubes supported Ru as highly active catalyst for photothermal catalytic CO2 reduction

Environmental remediation by tea waste and its derivative products: A review on present status and technological advancements.

Facile fabrication of mesoporosity silica as support for solid amine CO2 adsorbents with enhanced adsorption capacity and kinetics

Heteronanostructures constructed from vertical MoS2 nanosheets on sepiolite nanofibers boosting electrocatalytic hydrogen evolution

Heteroatomic doping of porous carbon materials can give rise to variations in the electronic structure and properties, and has been used to enhance the adsorption and separation of CO2. Herein, N and S doped zeolite-templated carbon (ZTC) are synthesized to study their CO2 adsorption and selective from CO2/N2. ZTC-N, ZTC-S and ZTC-NS exhibit comparatively high CO2 adsorption of 6.12, 7.73 and 9.32 mmol g−1 at 0 °C, which are more than three times than that of ZTC (1.98 mmol g−1). The CO2 adsorption capacity for ZTC-NS at 25 °C and 1 bar can reach as high as 6.03 mmol g−1, which can still occupy approximately 96% after 5 cycles. The obtained carbon materials ZTC-NS with the smallest BET surface area show the highest CO2 adsorption capacity, which indicate an obvious synergistic enhancement effect between sulfur and nitrogen doping. The detailed theoretical calculations indicate N and S co-doping into porous carbon materials assists the change of electrostatic surface potential and local electronic density, thus enhanced the CO2 adsorption. 

N/S co-doped microporous zeolite-templated carbon for efficient CO2 adsorption and separation

Interlayer functionalization of vermiculite derived silica with hierarchical layered porous structure for stable CO2 adsorption

Principle of image edge detection system and advantages of FPGA technique in processing speed and exploitation period are discussed briefly and feasibility based on Sobel operator to implement image edge detection is analyzed Coprocessor module of image edge detection with EDA+FPGA technique is presented to meet the real-time request of image edge detection Synthesis and waveform simulation prove that the design of image edge detection system is correct

Keping Zhao

Papers

Interlayer functionalization of vermiculite derived silica with hierarchical layered porous structure for stable CO2 adsorption

The design of image edge detection system based on EDA technique

Amine-impregnated porous carbon-silica sheets derived from vermiculite with superior adsorption capability and cyclic stability for CO2 capture