A meta-analysis identifies the optimal temperature range to produce biochar with the best nutritional properties for restoring barren coal mine lands

Surface coal mining leaves behind a desolate landscape of rock fragments and impoverished soil known as spoil. This material is often acidic, lacks organic matter and nutrients, and struggles to hold water, making it extremely difficult for plant life to return. A promising soil amendment called biochar has shown potential for reviving these degraded lands, but its effectiveness depends entirely on how it's made.

Biochar is a charcoal-like substance created by heating organic biomass, such as wood or agricultural waste, in a low-oxygen environment through a process called pyrolysis. When added to soil, it can improve its structure, increase water retention, and supply essential nutrients for plants. However, the temperature of the pyrolysis process directly alters the chemical and physical properties of the final biochar product.

Researchers at Tsinghua University have quantified the extensive climate-change mitigation potential of biochar. Their comprehensive review shows that this material, traditionally used as a soil amendment, can help reduce greenhouse gas emissions by an estimated 2.56 billion tons of CO₂ equivalent each year. This is achieved not only through its carbon-negative production process but also through a wide range of innovative uses that contribute to a more sustainable global economy. The study, led by author Liuwei Wang and corresponding author Deyi Hou, provides a roadmap for leveraging biochar in the pursuit of carbon neutrality by the middle of the century.

A three-decade study in southern China reveals that the physical arrangement of soil particles has a greater influence on the biochemical nature of stored carbon than the type of fertilizer applied.

A long-term agricultural experiment has revealed that the physical structure of soil is more important than the type of fertilizer used in determining the chemical makeup of stored organic carbon. After 32 years of consistent fertilization treatments, researchers from Tianjin Normal University and partner institutions discovered that the size of soil particles where organic matter is stored has the primary influence on its biochemical properties, a finding with significant implications for soil management and carbon sequestration strategies.

A new study published in Big Earth Data applies the INFORM Climate Change model to project future risks of humanitarian crises and disasters by integrating climate hazards, population dynamics, conflict, and socioeconomic development pathways. Incorporating forward-looking projections of vulnerability and coping capacity under different Shared Socioeconomic Pathways, the analysis shows that global risk may decline under moderate and rapid development scenarios but could rise sharply in the high-emission, fragmented SSP3 pathway. The findings provide evidence for prioritizing vulnerable regions and guiding targeted risk reduction and climate adaptation strategies.

Fruit color is a key trait influencing consumer preference, nutritional value, and market competitiveness, yet the molecular coordination behind pigment formation remains incompletely understood.

Quantum dot light-emitting diodes (QLEDs) have emerged as a leading platform for next-generation display technologies, gaining substantial research attention in recent years. Among various patterning strategies, direct photolithography offers distinct advantages through its high resolution, throughput, and process simplicity. However, current direct photolithography approaches face critical limitations in resolution and device performance, primarily arising from surface defect generation and photodamage of quantum dots (QDs) caused by deep-ultraviolet exposure and photochemical byproducts. To overcome these challenges, Xiang, Zhang, and Gu et al.  present a novel benzophenone-derived photosensitive crosslinker featuring a byproduct-free C–H insertion mechanism with native ligands of QDs. Through precise structure design, the photo-absorption of the crosslinker extends to 365 nm, allowing the long-awaited QD patterning under standard i-line photolithography conditions. The developed crosslinker achieves unprecedented patterning resolution (pixel size ≈500 nm) with preserved photoluminescent characteristics. Corresponding QLED devices demonstrate remarkable performance enhancements, including a maximum external quantum efficiency (EQE) of 16.48% and a T₉₅ operational lifetime of 2258.3 hours (approximately 2.1 times longer than pristine devices). These advancements establish a promising pathway toward high-resolution and high-performance QLEDs, thereby accelerating the commercialization of high-end optoelectronic devices.

A multidisciplinary research team has developed a solar-powered photothermal-photocatalytic synergistic platform (SPSP) capable of simultaneously producing fresh water from seawater and degrading antibiotic pollutants. Published in Nano Research on August 21, 2025, the designed SPSP system demonstrates high efficiency in both water evaporation and contaminant removal, thus providing a sustainable, low-carbon solution for integrated water purification and agricultural irrigation.

Researchers from the School of Materials Science and Engineering at Harbin Institute of Technology, led by Professor Jiao's team, report a photoelectrochemical photodetector that integrates α-Ga₂O₃ nanorod arrays with CdS quantum dots. By exploiting the pyro-phototronic effect, the device operates at zero-bias, and exhibits a broadband spectral response from 220 to 700 nm with responsivities of 0.99 mA W⁻¹ at 254 nm and 1.48 mA W⁻¹ at 450 nm. The rise and fall times are 30 ms and 24 ms, respectively. Furthermore, the detector executes “AND”, “OR”, and “NOT” logic functions and successfully transmits the optical message “HIT”. These results provide a route toward broadband, fast-response, and low-power optoelectronic modules for optical communication and sensing.