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401.
Suraj Loomba Muhammad Waqas Khan Muhammad Haris Seyed Mahdi Mousavi Ali Zavabeti Kai Xu Anton Tadich Lars Thomsen Christopher F. McConville Yongxiang Li Sumeet Walia Nasir Mahmood 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(18):2207310
Hydrogen is emerging as an alternative clean fuel; however, its dependency on freshwater will be a threat to a sustainable environment. Seawater, an unlimited source, can be an alternative, but its salt-rich nature causes corrosion and introduces several competing reactions, hindering its use. To overcome these, a unique catalyst composed of porous sheets of nitrogen-doped NiMo3P (N-NiMo3P) having a sheet size of several microns is designed. The presence of large homogenous pores in the basal plane of these sheets makes them catalytically more active and ensures faster mass transfer. The introduction of N and Ni into MoP significantly tunes the electronic density of Mo, surface chemistry, and metal-non-metal bond lengths, optimizing surface energies, creating new active sites, and increasing electrical conductivity. The presence of metal-nitrogen bonds and surface polyanions increases the stability and improves anti-corrosive properties against chlorine chemistry. Ultimately, the N-NiMo3P sheets show remarkable performance as it only requires overpotentials of 23 and 35 mV for hydrogen evolution reaction, and it catalyzes full water splitting at 1.52 and 1.55 V to achieve 10 mA cm−2 in 1 m KOH and seawater, respectively. Hence, structural and compositional control can make catalysts effective in realizing low-cost hydrogen directly from seawater. 相似文献
402.
Atif Saleem Jingjie Chen Meng Liu Nian Liu Muhammad Usman Ke Wang Muhammad Haris Yuezhou Zhang Peng Li 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(15):2207348
Contamination of water resources by toxic metals and opportunistic pathogens remains a serious challenge. The development of nano-adsorbents with desired features to tackle this problem is a continuously evolving field. Here, magnetic mesoporous carbon nanospheres grafted by antimicrobial polyhexamethylene biguanidine (PHMB) are reported. Detailed mechanistic investigations reveal that the electrostatic stabilizer modified magnetic nanocore interfaced mesoporous shell can be programmatically regulated to tune the size and related morphological properties. The core–shell nano-adsorbent shows tailorable shell thickness (≈20–55 nm), high surface area (363.47 m2 g−1), pore volume (0.426 cm3 g−1), radially gradient pores (11.26 nm), and abundant biguanidine functionality. Importantly, the nano-adsorbent has high adsorption capacity for toxic thallium (Tl(I) ions (≈559 mg g−1), excellent disinfection against Staphylococcus aureus and Escherichia coli (>99.99% at 2 and 2.5 µg mL−1), ultrafast disinfection kinetics rate (>99.99% within ≈4 min), and remarkable regeneration capability when exposed to polluted water matrices. The Tl(I) removal is attributed to surface complexation and physical adsorption owing to open ended mesopores, while disinfection relies on contact of terminal biguanidines with phospholipid head groups of membrane. The significance of this work lies in bringing up effective synchronic water purification technology to combat pathogenic microorganisms and toxic metal. 相似文献
403.
Joy Anjumol Unnikrishnan Gayathri Megha M. Haris M. Thomas Jibu Kolanthai Elayaraja Muthuswamy Senthilkumar 《Journal of Inorganic and Organometallic Polymers and Materials》2022,32(3):912-930
Journal of Inorganic and Organometallic Polymers and Materials - In recent times, the global demand for multi-biofunctional tissue scaffolds is rising gradually. The present study deals with the... 相似文献