Hydrogen peroxide (H ₂ O ₂ ), as a mild oxidant and promising liquid fuel, has widespread application potential in energy and environment fields.

Existing intuitionistic linguistic variables can describe the linguistic information of both the truth/membership and falsity/non-membership degrees, but it cannot represent the indeterminate and inconsistent linguistic information. To deal with the issue, this paper originally proposes the concept of a linguistic neutrosophic number (LNN), which is characterized independently by the truth, indeterminacy, and falsity linguistic variables. Then, we define the basic operational laws of LNNs and the score and accuracy functions of LNN for comparing LNNs. Next, we develop an LNN-weighted arithmetic averaging (LNNWAA) operator and an LNN-weighted geometric averaging (LNNWGA) operator to aggregate LNN information and investigate their properties. Further, a multiple attribute group decision-making method based on the proposed LNNWAA or LNNWGA operator is established under LNN environment. Finally, an illustrative example about selecting problems of investment alternatives is presented to demonstrate the application and effectiveness of the developed approach.

Covalent organic frameworks (COFs) have emerged as promising electrode materials for rechargeable metal-ion batteries and have gained much attention in recent years due to their high specific surface area, inherent porosity, tunable molecular structure, robust framework, and abundant active sites. Moreover, compared with inorganic materials and small organic molecules, COFs have the advantages of multi-electron transfer, short pathways, and high cycling stability. Although great progress on COF-based electrodes has been made, the corresponding electrochemical performance is still far from satisfactory for practical applications. In this review, we first summarize the fundamental background of COFs, including the species of COFs (different active covalent bonds) and typical synthesis methods of COFs. Then, the key challenges and the latest research progress of COF-based cathodes and anodes for metal-ion batteries are reviewed, including Li-ion batteries, Na-ion batteries, K-ion batteries, Zn-ion batteries, et al. Moreover, the effective strategies to enhance electrochemical performance of COF-based electrodes are presented. Finally, this review also covers the typical superiorities of COFs used in energy devices, as well as providing some perspectives and outlooks in this field. We hope this review can provide fundamental guidance for the development of COF-based electrodes for metal-ion batteries in the further research.

We employed RbI additive, constructed heterojunction, and used TOPO post-treatment for suppressing non-radiative recombination of MA-free WBG perovskite. The device showed a record PCE of 23.35%, a high V _OC of 1.3 V and the impressive stability.

Polymer nanosheets (CMPs, COFs, CTFs and carbon nitrides) have many unique advantages. This review summarizes the recent advances in polymer nanosheets for efficient photocatalysis including water splitting, pollutant degradation and CO₂ reduction.