Guoqiang Song

It is not merely the distinctive structural features of MOFs but also the active sites derived from both their metallic nodes and functionalized organic linkers that collectively govern the materials’ catalytic performance. One robust 2D cobalt complex, {[Co2(BTCB)Cl(H2O)(DMF)2]}n (Co-BTCB), was synthesized via solvothermal reaction between CoCl2 and an amide-functionalized tricarboxylic acid ligand. Single crystal structure indicates that Co-BTCB is a 2D laminated structure self-assembled from amide-functionalised tricarboxylic acid and dinuclear cobalt units. The nanoscale cavities within Co-BTCB exhibit abundant Lewis acid/base active sites conferred by Co2+ ions and amide groups, wherein Co2+ ions function as Lewis acid sites and amide groups as Lewis base sites, collectively endowing it with exceptional dual-functional catalytic activity. Co-BTCB demonstrates outstanding stability and heterogeneous catalytic performance in the carbon dioxide fixation to cyclic carbonate reaction and the cyanosilylation transformation of aldehydes employing trimethylsilyl cyanide (TMSCN) as the cyanide source

Lithium manganese iron phosphate (LMFP) has emerged as an ideal alternative to lithium iron phosphate (LFP) due to its higher operating voltage and resultant energy density.

LiFe _1-x Mn _x PO ₄ has emerged as a promising cathode material for lithium-ion batteries, combining the excellent rate capability of LiFePO ₄ with the high operating voltage of LiMnPO ₄ . However, the extremely low electronic conductivity and lithium-ion diffusion rate of LiMnPO ₄ severely limit its electrochemical activity, which in turn restricts the electrochemical performance of LiFe _1-x Mn _x PO ₄ . In this paper, carbon-coated LiFe _0.3 Mn _0.7 PO ₄ /C porous material was successfully synthesized by co-precipitation followed by secondary calcination, employing a stepwise ex situ carbon coating strategy. Specifically, the LiFe _0.3 Mn _0.7 PO ₄ matrix was prepared by co-precipitation, and the carbon source was introduced for secondary ball milling and calcination to achieve an effective carbon coating. The results of the high-resolution transmission electron microscopy characterization clearly demonstrate that the synthesized material consists of nearly-spherical particles with structural units of approximately 5.68 nm in diameter. The initial discharge specific capacity of the material is 169.4 mAhg ^-1 at a 0.1 C multiplication rate. After 200 cycles at a 1 C multiplication rate, the discharge specific capacity remains at 155.74 mAhg ^-1 , corresponding to a capacity retention rate of 99.77%. The kinetic analysis further confirmed its excellent lithium-ion diffusion capability. This multistage porous LMFP/C has been constructed based on a stepwise synthesis strategy and is stacked with nanoscale spherical particles. This system is expected to be a promising candidate for the development of the next-generation high-performance orthogonal cathode materials for high-capacity lithium-ion batteries.

The long-distance transport of wastewater in sewers inevitably leads to the formation of biofilms on the inner wall of sewers. Numerous studies have focused on analyzing the hydrogen sulfide, methane production, and emission patterns associated with sewer biofilms in sewer systems. This study employed bibliometric methods to analyze the research progress in the field of sewer biofilms from 1995 to 2025, and revealed the associated development trend, international cooperation network, and research hotspots. The results demonstrate a substantial increase in the number of annual publications over the past decade, with China and Australia as the primary contributors. The journal Water Research has been found to exert a significant influence. The research hotspots concentrate on the generation and control of hydrogen sulfide and methane, sewer corrosion mechanisms, and microbial community dynamics, with chemical dosing, sulfate-reducing bacteria, and biofilm metabolism as the key directions. The evolution of keywords demonstrates that early research focused on organic matter transformation, and in recent years, there has been a shift towards microbial ecology and wastewater epidemiology, along with other emerging areas. Recent years have seen China as well as China’s institution and authors emerge as the primary contributors in the sewer biofilm field, a development attributable to the country’s policy support, which has precipitated the development of green technologies and smart monitoring systems. This study demonstrates the necessity of international cooperation and provides theoretical references and technological directions for future sewer biofilms research.

The oxidation process of TiCN and its transformation into C/N-doped TiO ₂ with enhanced photocatalytic activity under visible light.

This paper presents a transient-enhanced digital LDO with adaptive clock edge control. An under-strength detector and an adaptive clock edge multiplier are devised to achieve adaptive tuning of the clock signal, which generates a double rising edge clock signal. This method can be combined with traditional digital feedforward techniques to significantly improve the transient response of the digital low-dropout regulator. The proposed DLDO is implemented using a 180nm CMOS process and achieves a maximum current efficiency of 98.8% and quiescent current of 9.8µA when operated at input and output voltages of 0.9V and 0.85V. The proposed method reduces the response time by 50%.

A novel and sustainable carbon‐based material, referred to as hollow porous carbon particles encapsulating multi‐wall carbon nanotubes (MWCNTs) (CNTs@HPC), is synthesized for use in supercapacitors. The synthesis process involves utilizing LTA zeolite as a rigid template and dopamine hydrochloride (DA) as the carbon source, along with catalytic decomposition of methane (CDM) to simultaneously produce MWCNTs and CO_x‐free H₂. The findings reveal a distinctive hierarchical porous structure, comprising macropores, mesopores, and micropores, resulting in a total specific surface area (SSA) of 913 m² g⁻¹. The optimal CNTs@HPC demonstrates a specific capacitance of 306 F g⁻¹ at a current density of 1 A g⁻¹. Moreover, this material demonstrates an electric double‐layer capacitor (EDLC) that surpasses conventional capabilities by exhibiting additional pseudocapacitance characteristics. These properties are attributed to redox reactions facilitated by the increased charge density resulting from the attraction of ions to nickel oxides, which is made possible by the material's enhanced hydrophilicity. The heightened hydrophilicity can be attributed to the presence of residual silicon‐aluminum elements in CNTs@HPC, a direct outcome of the unique synthesis approach involving nickel phyllosilicate in CDM. As a result of this synthesis strategy, the material possesses excellent conductivity, enabling rapid transportation of electrolyte ions and delivering outstanding capacitive performance.