Photothermal synergistic catalysis (PTSC) offers promising potential for the dry reforming of methane (DRM) to produce syngas, but designing suitable catalysts suitable for photothermal processes poses significant challenges. In this study, we present a core -shell catalyst consisting of a SiO2 shell encapsulating Ni loaded on the CeO2-ZrO 2 support, which proved to be well -suited for PTSC-DRM under milder conditions. Compared to traditional thermal catalysis (TC), PTSC at 600 degrees C exhibited superior CH4/CO2 conversions (63.5 %/55.9 %) and higher H 2 /CO yields (137.0 mmol & sdot; g -1 & sdot; h -1 /182.9 mmol & sdot; g -1 & sdot; h -1 ). The TOFs under PTSC-DRM are 1.3-2.9 times higher than the corresponding TOFs in TC-DRM. The catalyst demonstrated strong stability during a 60-h aging test, which can be attributed to the restricted migration of Ni and the accelerated movement of oxygen induced by illumination via structure effect which also lead to the boosted activity benefited from a reduced bandgap of 2.2 eV and improved charge separation/migration efficiency during PTSC reaction.

The bacterial infection and poor osseointegration of Ti implants could significantly compromise their applications in bone repair and replacement. Based on the carrier separation ability of the heterojunction and the redox reaction of pseudocapacitive metal oxides, we report an electrically responsive TiO2-SnO2-RuO2 coating with a multilayered heterostructure on a Ti implant. Owing to the band gap structure of the TiO2-SnO2-RuO2 coating, electron carriers are easily enriched at the coating surface, enabling a response to the endogenous electrical stimulation of the bone. With the formation of SnO2-RuO2 pseudocapacitance on the modified surface, the postcharging mode can significantly change the surface chemical state of the coating due to the redox reaction, enhancing the antibacterial ability and osteogenesis-related gene expression of the human bone marrow mesenchymal stem cells. Owing to the attraction for Ca2+, only the negatively postcharged SnO2@RuO2 can promote apatite deposition. The in vivo experiment reveals that the S-SnO2@RuO2-NP could effectively kill the bacteria colonized on the surface and promote osseointegration with the synostosis bonding interface. Thus, negatively charging the electrically responsive coating of TiO2-SnO2-RuO2 is a good strategy to endow modified Ti implants with excellent antibacterial ability and osseointegration.

The high-efficiency reduction of carbon dioxide (CO2) to high value-added compounds is of paramount importance for ameliorating energy shortage and reducing greenhouse effect. Photo-thermal catalysis (PTC) can be exploited not only to utilize solar energy, but also to enable efficient chemical reactions with comparably moderate circumstances, which has been proven promising for activation and conversion of CO2. Herein, PTC strategy combining photocatalysis (PC) and thermocatalysis (TC) processes, along with the influence of reaction conditions on them are summarized. Particularly, design of the catalyst and their modified materials that can utilize the advantages of photothermal reactions, along with the relevant catalytic mechanisms in the process of CO2 conversion, have been systematically summarized. Besides, the photo-thermal reactor can facilitate concurrent solar photo- and thermo-chemical reactions in laboratory scale and the basic principle would be useful for future design of productive scale are given as well. We expect that this review will stimulate further investigation of novel catalytic materials and apparatuses for PTC reduction of CO2 and of previously un-reported features of existing catalytic materials to uncover underlying “diamonds in the rough”.

Photothermal synergistic catalysis (PTSC) is a potential and attractive technology due to its enhanced performance in medium- and low-temperature conditions. Herein, the present work focuses on investigating PTSC CO2 hydrogenation over Ni/ZrO2 doped with Ru. Compared with thermal catalysis, the NiRu0.23/ZrO2 resulted in higher CO2 conversion and CH4 selectivity at all temperature in PTSC condition. Among all the catalysts, NiRu0.02/ZrO2 exhibits the best performance, which the CO2 conversion reach 48.37

The hydrogenation of CO2 to CH4 presents a captivating and challenging avenue for CO2 reutilization. In this study, we explored the potential of photo-thermal catalytic (PTC) reactions for CO2 conversion to CH4. Herein, we employed a novel catalyst, NiRu/ZrO2, for photothermal CO2 methanation. Remarkably, the Ru-doped Ni/ ZrO2 catalyst demonstrated significantly higher catalytic activity compared to the Ni monometallic catalyst. The optimized Ru doping conditions led to decreased temperature requirements and promoted CO2 conversion rates, achieving an impressive 100% CH4 selectivity. Detailed characterizations of the catalyst revealed several advantageous properties of NiRu/ZrO2, including superior optical absorption performance, a higher temperature of CO2 resolved peak, and an increased binding energy of the Ni2+ peak. Furthermore, density functional theory (DFT) calculations demonstrated that the addition of Ru positively influenced CO2 adsorption, thereby lowering the energy barrier for CO2 decomposition and C species hydrogenation. This research sheds light on the potential of the Ru-doped Ni/ZrO2 catalyst for efficient CO2 conversion to CH4 through photothermal catalysis. These findings offer valuable insights for the development of advanced catalysts in CO2 reutilization strategies.

Dry reforming of methane (DRM) is appealing for syngas production yet challenging due to its high reactive energy barrier and catalyst deactivation.

Photothermal synergistic catalysis (PTSC) offers promising potential for the dry reforming of methane (DRM) to produce syngas, but designing suitable catalysts suitable for photothermal processes poses significant challenges. In this study, we present a core-shell catalyst consisting of a SiO2 shell encapsulating Ni loaded on the CeO2–ZrO2 support, which proved to be well-suited for PTSC-DRM under milder conditions. Compared to traditional thermal catalysis (TC), PTSC at 600 °C exhibited superior CH4/CO2 conversions (63.5 %/55.9 %) and higher H2/CO yields (137.0 mmol·g-1·h-1/182.9 mmol·g-1·h-1). The TOFs under PTSC-DRM are 1.3–2.9 times higher than the corresponding TOFs in TC-DRM. The catalyst demonstrated strong stability during a 60-h aging test, which can be attributed to the restricted migration of Ni and the accelerated movement of oxygen induced by illumination via structure effect which also lead to the boosted activity benefited from a reduced bandgap of 2.2 eV and improved charge separation/migration efficiency during PTSC reaction.

In this paper, performance of ZrO2 and CeO2 supported Ni catalysts on CO2 hydrogenation reaction was investigated in continuous flow reactor. The results revealed that Ni/ZrO2 catalyst exhibited superior performance compared to Ni/CeO2, with a CO2 conversion rate of 71.84

Syngas production from dry reforming (DRM) of CO2 and CH4 is a promising technology to reduce carbon emission, however, harsh reaction condition required in conventional thermal catalytic DRM frequently leads to poor economy and severe carbon deposition in catalysts. Herein, the present work reports a novel photothermal synergistic catalytic (PTSC) DRM over Ce-doping Ni/ZrO2 catalyst at medium-low temperature. The maximum CO2/CH4 conversions (51.6% and 54.6%) were obtained for Ni-Ce/ZrO2 at 600 degrees C via synergy of illumination, which was about 1.3 times higher than that under thermal catalytic DRM. Ce doped catalyst maintained good activity and thermal stability after the aging test over 23 h. The TOF values of Ni-Ce bimetallic catalyst under PTSC condition have 1.2-3.3 times enhancement compared to thermal condition. Characterization and DFT calculation results reveal that Ce doping facilitates the formation of oxygen vacancies and effectively weakens C adsorption on Ni metal to suppress carbon deposition.

Photocatalytic fixation of nitrogen is the most attractive method for the sustainable production of ammonia (NH3), which has attracted increasing attention, but the development of a highly active, stable and low-cost photocatalyst remains a great challenge. Herein, O, S co-doped carbon nitride (HGCNOS) based on carbon nitride (GCN) material was fabricated by a one-pot hydrothermal method at 180 °C. Our results revealed that O, S atoms were successfully doped into GCN and HGCNOS showed better crystallinity and periodicity, shorter interlayer distances and great resistance to electron–hole recombination. The results of nitrogen fixation experiments showed that the ammonium ion yield of HGCNOS photocatalyst was as high as 0.23 mg/L/mg-cat after 2 h. And the minuscule changes in photocatalytic performance after 3 consecutive cycles (4 h for each cycle), demonstrated excellent cycling stability. DFT calculations show that the introduction of O, S atoms promotes photo-excited charge separation, facilitates electrons’ leap and is more conducive to N2 adsorption, and consequently, an excellent photo-reactivity of HGCNOS. The results acquired may shed light on general doping strategies for designing potentially efficient photocatalysts.

Selective CH 4 formation from CO 2 hydrogenation is an appealing yet challenging sunlight-driven or thermal-driven process due to low solar energy utilization efficiency or high energy input.

The bacterial colonization and poor osseointegration of Ti implants significantly compromise their applications in load-bearing bone repair and replacement. To endorse the Ti with both excellent bioactivity and antibacterial ability, we developed a microarc oxidation coating that was modified uniformly by hydroxyapatite (HA) nanodots arrays and loaded regionally with chitosan hydrogel containing ciprofloxacin. The bonding between the HA nanodots covered coating and the chitosan hydrogel is further enhanced via silanization and chemical grafting of glutaraldehyde. Benefiting from the regionally loaded structure of the chitosan hydrogel, the chitosan hydrogel unloaded area can promote the cell adhesion and proliferation with excellent bioactivity, though relatively low OD value of cck8 has been observed at the beginning of the cell culturing. Whereas, the OD value of cck8 rises with the prolongation of the cell culturing time due to the degradation of the regionally loaded chitosan hydrogel. With the help of the laden ciprofloxacin in chitosan hydrogels, the sample effectively sterilizes the bacterial with a bacteriostatic ring. Therefore, regional loading of chitosan hydrogel containing ciprofloxacin on the modified microarc oxidation coating is a good approach to endorse Ti with both excellent bioactivity and antibacterial ability.