On of ice by leaving freezing macropores around the final freeze-drying procedure ice in the course of the liquid nitrogen abundantprocess. Moreover, thecarbon solution. Aside from the sublimation of ice by leaving abundant macropores on the final carbon on TEM drivesmacropores, quite a few mesopores with sizes of 20 nm is usually observed solution. photos (Figure 1d ). These uniformly distributed mesopores are most likely derived Apart from macropores, quite a few mesopores with sizes of 20 nm can be observed on from a silica (Figure 1d ). These uniformly distributed mesopores are most in all probability TEM photos template. Furthermore, the fairly long-range -Irofulven web parallel stacking of curved carbon from a silica observed as shown the somewhat long-range parallel stacking of derivedlayers could betemplate. Additionally,by arrows around the HR-TEM photos (Figure 1e,g), indicating a relatively great crystallization for HPCs. Meanwhile, curved carbon layers curved carbon layers may very well be observed as shown by arrows around the HR-TEM photos (Fig(as 1e,g), indicating a reasonably fantastic nanoporosity, and serve as an active web-site for energy ure marked in Figure 1e,g) give rise tocrystallization for HPCs. Meanwhile, curved carbon storage in the course of electrochemical measurements. Elemental mappings as HPC8 show for layers (as marked in Figure 1e,g) give rise to nanoporosity, and servefor an active sitethat aside from carbon elements, phosphorus, Inositol nicotinate manufacturer oxygen and Elemental mappings for HPC8 energy storage throughout electrochemical measurements. nitrogen components are uniformly distributed within this carbon sample (Figures 1h,k and S3). The successive phosphorus doping show that aside from carbon components, phosphorus, oxygen and nitrogen elements are was fulfilled, though in this carbon sampledipotassium was introducedsuccessive phosuniformly distributed pretty small phytic acid (Figures 1h,k and S3). The as a phosphorus precursor. XPS evaluation, to be discussed later, additional acid dipotassium was successive phorus doping was fulfilled, despite the fact that pretty tiny phyticconfirms that there’s aintroduced doping of phosphorus. Also, it shows an increase in P content confirms that there as a phosphorus precursor. XPS evaluation, to be discussed later, furtheras the carbonization temperature increases of phosphorus. C and also the P it shows detected to become 2.78 at as is often a successive doping from 600 to 800 In addition,content material is an boost in P contentfor HPC8 (Table 1). the carbonization temperature increases from 600 to 800 along with the P content material is detectedto be 2.78 at for HPC8 (Table 1).Nanomaterials 2021, 11, 2838 terials 2021, 11, x FOR PEER REVIEW5 of5 ofFigure 1. SEM photos of HPC8 (a ), TEM images (d,e) and (d,e) and HPC6 (f,g) element element Figure 1. SEM photos of HPC8 (a ), TEM images for HPC8 for HPC8 HPC6 (f,g) and EDS and EDSmapping for HPC8 mapping for HPC8 (h ). (h ).Gas sorption analyses were employed to further detect the surface area and poreTable 1. Atomic percentage (at ) for each and every element in HPCs detected by EDS and XPS. structure parameters for HPCs. The adsorbed quantities (Figure 2a) of N2 for each samples Sample Ca Oa Pa can reach a plateau in the low relative pressureN a region (P/P0 0.01), b C which suggests the b Ob N Pb existence of micropores and smaller mesopores. Apparent hysteresis loops suggest the presHPC6 90.25 4.23 five.19 0.33 91.01 five.97 2.45 0.58 ence of mesopores in HPCs. The greater adsorbed quantity in the 87.88 relative stress higher HPC8 87.11 five.56 four.55 two.78 eight.67 0.96 two.49 a detec.
