Design a novel and efficient adsorption-reutilization system is required urgently to overcome the difficulty of heavy metal-polluted water and secondary pollution of adsorbent-heavy metals. Here, a functional imitation wood-derived adsorbent was fabricated with carboxyl-functionalized ordered mesoporous tube bundles (named as OMTB@CA-IWA), which was successfully used in the high efficiency removal of heavy metal and then reused in chemiluminescence after adsorption. Experimental results indicated that high-density carboxyl groups were grafted onto the ordered mesoporous tube bundles of the delignified parasol via chemical modification, resulting in an efficient adsorption toward various heavy metal from wastewater. More importantly, the adsorbed spent adsorbent (M 2+ @OMTB@CA-IWA) was reused for the first time to act as heterogeneous catalytic cites for the chemiluminescence via an ingenious strategy in the system of N-(4-aminobutyl)-N-ethylisoluminol (ABEI) and H 2 O 2 . The prepared chemiluminescence system presented high intensity (1.42 ×10 6 a.u.) and long duration time (over 10 h), which avoids the traditional secondary pollution and waste reprocessing. In view of the low price, easy availability and renewable of raw materials, the simple facile fabrication process, and the high efficiency of adsorbent as well as the interesting strategy for successive application in adsorption and chemiluminescence, the OMTB@CA-IWA will potentially bring about high speed development and widespread applications in wastewater treatment , biological imaging and cold light sources.
It is crucial but challenging to promote sluggish kinetics of oxygen evolution reaction (OER) for water splitting via finely tuning the hierarchical nanoarchitecture and electronic structure of the catalyst. To address such issues, herein we present iron-doped Ni3Se4/NiSe2 heterostructure-embedded metal–organic framework-derived mesoporous tubes (Ni-MOF-Fe-Se-400) realized by an interfacial engineering strategy. Due to the hierarchical nanoarchitecture of conductive two-dimensional nanosheet-constructed MOF-derived mesoporous tubes, coupled with fine tuning of the electronic structure via Fe-doping and interactions between Ni3Se4/NiSe2 heterostructures, the Ni-MOF-Fe-Se-400 catalyst delivers superior OER activity: it requires only a low overpotential of 242 mV to achieve 10 mA cm–2 (Ej=10), surpassing the benchmark RuO2 (Ej=10 = 286 mV) and displays exceptional durability in the chronoamperometric i–t test with a small current decay (6.2%) after 72 h. Furthermore, the water splitting system comprises a Ni-MOF-Fe-Se-400 anode and a Pt/C cathode requires a low cell voltage of 1.576 V to achieve Ej=10 with an excellent Faradic efficiency (∼100%), outperforming the RuO2–Pt/C combination. This work presents a novel interfacial engineering strategy to finely adjust the morphology and electronic structure of the non-noble metal-based OER catalyst via a facile fabrication method.
危险品化学品经营许可证（带存储）